Steel plate heat treatment pilot plant and use method thereof

Abstract

The invention belongs to the technical field of steel plate heat treatment and relates to a steel plate heat treatment pilot plant and a using method thereof. The device takes a roller quenching machine as a center, and mechanisms on the two sides of the device have consistent functions and are symmetrically arranged; the mechanisms on the two sides respectively comprise a cantilever crane, a conveying roller way group, a centering mechanism, a C-shaped hook, a vehicle bottom type heating furnace and an input / output roller way group, and the functions of sample feeding centering, transferring, normalizing heating, quenching, tempering heating, slow cooling and the like can be continuously and automatically realized. According to the device, the steel plate heat treatment industrial production line is reduced in equal proportion, the industrial steel plate heat treatment process is fully reduced, unmanned automatic operation can be realized, a simple, feasible, safe and reliable test means is provided for research and development of new steel types, new steel grades and new heat treatment processes of quenched and tempered steel plates, and favorable conditions are created for shortening the research and development period and reducing the research and development cost.

Description

Technical Field

[0001] The present invention relates to the technical field of heat treatment of steel plates, and in particular to a pilot device for heat treatment of steel plates and a method for using the same. Background Art

[0002] High-strength high-quality steel plates are key raw materials in the fields of equipment manufacturing, transportation, petrochemicals, military industry, etc., and are essential for the large-scale, safe and stable operation of equipment. After rolling and forming, such steel plates need to be heat treated, and different heating and cooling systems are used to adjust the steel plate structure and shape to obtain better performance.

[0003] The heat treatment of quenched and tempered steel plates usually includes normalizing, quenching, tempering and other processes. Its characteristics are as follows: ① There are many types of steel and the heat treatment process is complicated. Conventional quenched and tempered steel plates include low-alloy high-strength steel, marine and shipbuilding steel, energy and chemical steel, pressure vessel steel, power steel, transportation steel, wear-resistant and corrosion-resistant steel, bridge high-rise steel, military steel and other categories. The strength and toughness, service performance and processing performance required by various types of steel plates are different. The heat treatment processes such as heating rate, heating temperature, holding time, quenching cooling rate, final cooling temperature, tempering temperature, tempering time, etc. are quite different. It is very difficult to accurately control the heat treatment process parameters and scientifically and continuously control the heat treatment process. ② The steel plate specifications span a large range. At present, the quenched and tempered heat treated steel plates can be achieved in the thickness range of 2 to 400 mm, the width range of 900 to 5350 mm, and the length range of 3 to 25 m. It is very difficult to formulate and implement the heat treatment process to take into account the heat treatment plate shape, surface quality, performance and uniformity of large-size span steel plates. ③ The heat treatment production line has many equipments, including shot blasting machines, normalizing / quenching furnaces, quenching machines, tempering furnaces, marking machines, straightening machines, cooling beds and other single equipments, as well as connecting rollers, hydraulic and lubrication systems, three-electric systems, water treatment systems, air compressor stations and other supporting and ancillary facilities. The energy consumption of steel plate heat treatment production is high, the equipment maintenance cost is high, and the production organization is very difficult.

[0004] As users' requirements for the toughness, service performance and processing performance of quenched and tempered steel plates gradually increase, the upgrading of steel plate heat treatment process technology and the development of new steel grades are gradually receiving attention from steel companies, and new steel grades and new steel grades with excellent performance, surface quality and plate shape continue to emerge. However, due to the constraints of production line equipment technology level, energy consumption indicators, production plans and other conditions, the research and development of new steel grades, new steel grades and new processes often consumes a lot of manpower and material resources, occupies a lot of normal production time, and the test impacts the equipment limit level, causing equipment damage. These unfavorable factors have exacerbated the contradiction between production and research and development, and the test results often fail to meet expectations.

[0005] The present invention aims to develop a pilot plant for heat treatment of steel plates, which can fully restore the actual production conditions and reduce the scale of the production line by a certain proportion. R&D personnel can freely design the heat treatment process without being restricted by equipment level, production plan, etc., with low energy consumption and short test cycle, providing an effective R&D means for promoting the performance upgrade of quenched and tempered steel plates.

[0006] Among the existing patents, the Chinese patent application (publication number CN221254639U) proposes a steel plate heat treatment equipment, including a heating furnace, a quenching device, a tempering furnace and a conveying device. This patent is used for steel plate heat treatment production rather than pilot production, and the equipment configuration, function, etc. are very different from the present invention.

[0007] A Chinese patent application (publication number CN117340034A) proposes a steel plate heat treatment equipment, including a uncoiler, a straightener, a transverse shearing machine, a heating furnace and a quenching machine arranged in sequence along the running direction of the strip. This patent is used for continuous or single-piece heat treatment production of steel plates (strips), and the equipment configuration, functions, etc. are very different from the present invention.

[0008] The Chinese patent application (publication number CN213232403U) proposes a steel plate heat treatment equipment, including a heating furnace, a quenching device, and a tempering furnace. The patent is used for continuous heat treatment production of steel plates, and is very different from the steel plate heat treatment pilot device of the present invention in terms of equipment layout and structure, production line functions and working methods. Summary of the invention

[0009] In view of the problems existing in the research and development of new steel types, new steel grades and new processes for quenched and tempered steel plates, such as the difficulty in production organization and coordination, the wide variety of steel types and specifications, limited test processes, high test costs and energy consumption, the purpose of the present invention is to provide a pilot device for heat treatment of steel plates, which can proportionally reduce the scale of the production line, restore the actual conditions of large-scale industrial production, reduce R&D costs, shorten the R&D cycle, give full play to the technical level of R&D personnel, and promote the continuous upgrading of quenched and tempered steel plates.

[0010] The invention is suitable for pilot heat treatment of steel plate samples with a thickness of 3 to 350 mm, a width of 100 to 550 mm, and a length of 600 to 800 mm.

[0011] The technical solution of the present invention is as follows: a pilot plant for heat treatment of steel plates, with a roller quenching machine 9 as the center, and the functions of the mechanisms on both sides are consistent and symmetrically arranged; the mechanisms on both sides respectively include a cantilever crane, a transport roller group, a centering mechanism, a C-type hook, a car-bottom heating furnace and an input / output roller group; the roller quenching machine 9, the input / output roller group, the car-bottom heating furnace, and the transport roller group are arranged in sequence; the centering mechanism is arranged on the transport roller group; the cantilever crane is used to hoist the sample 2, and the C-type hook hoists the sample 2.

[0012] The transport roller set is symmetrically arranged at the outermost ends of both sides of the steel plate heat treatment pilot device 1, and is mainly composed of multiple rollers and brackets 16. It adopts a centralized chain transmission method, and the roller speed range is 1 to 10 m / min.

[0013] The centering mechanism adopts cylinder clamping mechanisms on both sides to center the sample 2 on the transport roller set.

[0014] The car bottom heating furnace is arranged on one side of the steel plate heat treatment pilot device 1, and the car bottom 18 is retractable to accommodate the sample 2 to be heated or the sample 2 to be lifted out after heating; the car bottom heating furnace is a normalizing / tempering dual-purpose furnace with a maximum operating furnace temperature of 1200°C, and the heating rate and insulation time can be automatically adjusted. The retraction of the car bottom 18 and the opening and closing of the furnace door are interlocked with the lifting or moving action of the C-hook, which is used to automatically load and unload the sample 2.

[0015] The lifting mechanism of the C-shaped hook adopts an electric cylinder lifting method, and the lifting is controlled by a servo control system; the transverse movement mechanism of the C-shaped hook is driven by a servo control system.

[0016] The input / output roller set is used to connect the car bottom heating furnace and the roller quenching machine 9, to receive and transfer the heated or quenched sample 2, and the roller speed range is 1-40m / min.

[0017] The roller quenching machine 9 is mainly composed of a forward high-pressure section 19, a reverse high-pressure section 20, and a low-pressure section 21. The water supply pressure of the forward high-pressure section 19 and the reverse high-pressure section 20 is 10 bar, and the maximum water supply flow rate is 1000m 3 / h, low pressure section 21 water supply pressure 3 ~ 6bar, maximum water supply 800m 3 / h; the flow rate of each nozzle is controlled by the control valve group 23 on each branch water supply pipeline 22; the upper row of rollers 25 of the roller quenching machine 9 are connected to the mobile frame 24, and the mobile frame 24 is controlled to lift and lower to drive the upper row of rollers 25, and the roller gap of the roller quenching machine 9 is controlled, and the roller gap adjustment range is 0 to 400 mm; the transmission system 26 is respectively connected to the upper row of rollers 25 and the lower row of rollers 27 to drive the two to rotate and transfer the sample 2 to the specified position; the roller line speed range of the upper row of rollers 25 and the lower row of rollers 27 is 1 to 40 m / min.

[0018] A method for using a steel plate heat treatment pilot device, wherein the steel plate heat treatment pilot device can perform forward heat treatment and reverse heat treatment; the forward heat treatment process is: forward sample loading → sample normalizing heating → sample quenching → sample tempering → sample unloading; the reverse heat treatment process is: reverse sample loading → sample normalizing heating → sample quenching → sample tempering → sample unloading.

[0019] During forward heat treatment, one side transport roller group is used to realize the loading, transportation and positioning of sample 2; one side transport roller group transports sample 2 to the position of one side C-hook, and at the same time, the bottom 18 of the car-type heating furnace on one side is extended, and the one side C-hook lifts sample 2 and moves it upward and horizontally to the top of the bottom 18, and places sample 2 on the bottom 18 of the car-type heating furnace, and the bottom 18 is retracted to perform normalizing heating; after normalizing heating, the bottom 18 is extended, and sample 2 is transferred from one side C-hook to one side input / output roller group, and two actions are performed at the same time: ① the bottom 18 of the car-type heating furnace on one side is retracted, and the car-type heating furnace on one side stops heating; ② the forward high-pressure section 19 and low-pressure section 21 of the roller quenching machine 9 are supplied with water by the branch water supply pipeline 22, and the water volume and water pressure are controlled by the control valve group 23; one side input / output roller group is used to The sample 2 is transported to the roller quenching machine 9 for quenching and cooling at the same process speed as the roller quenching machine 9; the sample 2 passes through the forward high-pressure section 19, the low-pressure section 21 and the reverse high-pressure section 20 in sequence, and is transported out of the roller quenching machine 9 by the input / output roller table group on the other side, and the reverse high-pressure section 20 is not put into use at this time; the cooled sample 2 is transported to the input / output roller table group on the other side at the same process speed as the roller quenching machine 9; while the sample 2 moves on the input / output roller table group on the other side, two actions are performed: ① the bottom 18 of the car bottom heating furnace on the other side extends out, and the C-type hook on the other side waits at the end of the input / output roller table group on the other side; ② the water supply pipelines 22 of the forward high-pressure section 19 and the low-pressure section 21 of the roller quenching machine 9 are closed by the control valve group 23, and the upper roller 25 and the lower roller 27 stop rotating;

[0020] When the sample 2 moves to above the C-hook on the other side, the input / output roller group on the other side stops rotating; the sample 2 is lifted up and moved laterally to above the car bottom 18 in the extended position, and the C-hook on the other side places the sample 2 on the car bottom 18. The car bottom 18 is retracted, and the sample 2 is tempered and heated in the car bottom heating furnace on the other side; the sample 2 is transferred from the car bottom 18 of the car bottom heating furnace on the other side to the transport roller group on the other side; the transport roller group on the other side is used to realize the unloading of the sample 2 and the swing cooling of the sample 2 after tempering.

[0021] During the reverse heat treatment, the transport roller group on the other side is used for loading, transporting and positioning the sample 2; the transport roller group on the other side transports the sample 2 to the position of the C-hook on the other side, and at the same time, the bottom 18 of the car bottom heating furnace on the other side is extended, and the C-hook on the other side lifts the sample 2 and moves it upward and horizontally to the top of the bottom 18 in the extended position, and the C-hook on the other side places the sample 2 on the bottom 18 of the car bottom heating furnace on the other side, and the bottom 18 is retracted, and the sample 2 is normalized and heated in the car bottom heating furnace on the other side; the sample 2 after normalization and heating in the car bottom heating furnace on the other side is transferred from the C-hook on the other side to the input / output roller on the other side. After the assembly, two actions are performed simultaneously: ① The bottom of the car 18 of the car bottom heating furnace on the other side is retracted, and the car bottom heating furnace on the other side stops heating; ② The reverse high-pressure section 20 and the low-pressure section 21 of the roller quenching machine 9 are supplied with water by the branch water supply pipeline 22, and the water volume and water pressure are controlled by the control valve group 23; the input / output roller table group on the other side transports the sample 2 to the roller quenching machine 9 at the same process speed as the roller quenching machine 9 for quenching and cooling; the sample 2 passes through the reverse high-pressure section 20, the low-pressure section 21 and the forward high-pressure section 19 in turn, and is transported out of the roller quenching machine 9 by the input / output roller table group on one side, and the forward high-pressure section 19 is not put into use at this time;

[0022] The cooled sample 2 is transported to one side input / output roller table group at the same process speed as the roller quenching machine 9; while the sample 2 is moving on the one side input / output roller table group, two actions are performed simultaneously: ① the car bottom 18 of the car bottom heating furnace on one side is extended, and the C-type hook on one side is waiting at the end of the one side input / output roller table group; ② the reverse high pressure section 20 and low pressure section 21 water supply pipeline 22 of the roller quenching machine 9 are closed by the control valve group 23, and the upper roller 25 and the lower roller 27 stop rotating;

[0023] When the sample 2 moves to above the C-hook on one side, the input / output roller group on one side stops rotating, the C-hook on one side lifts the sample 2 and moves it upward and horizontally to above the bottom 18 of the car-type heating furnace on one side in the extended position, the C-hook on one side places the sample 2 on the bottom 18 of the car-type heating furnace on one side, the bottom 18 is retracted, and the sample 2 is tempered and heated in the car-type heating furnace on one side; the sample 2 is transferred from the bottom 18 of the car-type heating furnace on one side to the transport roller group on one side; the transport roller group on one side is used to realize the unloading of the sample 2 and the swing cooling of the sample 2 after tempering.

[0024] The advantages and beneficial effects of the present invention are:

[0025] 1. The present invention follows the production mode of large-scale industrialized heat treatment line for steel plates, omits auxiliary mechanisms irrelevant to the heat treatment performance and surface quality of steel plates, and configures various components based solely on the influence of the heat treatment process on the performance of steel plates, thereby proportionally reducing and restoring the industrial production process, so that the originally complex and costly research and development process of new steel types, new steel grades, and new processes can be realized on a simple pilot device, thereby accelerating the research and development cycle, reducing research and development costs, and providing effective experimental means for the development of tempered heat-treated steel types and process upgrades for steel enterprises.

[0026] 2. The equipment of the present invention is simple to operate and has complete functions. It can realize forward heat treatment and reverse heat treatment, organically combine the heat treatment furnace and the quenching machine, and is convenient for switching multiple specifications, multiple steel types, and complex heat treatment process systems at any time. It can implement process flows that cannot be completed by conventional industrial large-scale production heat treatment lines, and create favorable conditions for the research and development of new heat treatment technologies.

[0027] 3. The equipment of the present invention has a high degree of automation and can realize unmanned operation. On the one hand, it effectively reduces the energy consumption of the test and reduces the waste emission indicators. On the other hand, it effectively reduces the risk of personnel operation. R&D personnel can complete the test process in a closed and safe environment with low noise and dust pollution and non-high temperature, which is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a plan view of the steel plate heat treatment pilot plant in the present invention.

[0029] Figure 2 It is a schematic diagram of the structure of the roller quenching machine equipment in the present invention.

[0030] In the figure, 1 is a pilot plant for heat treatment of steel plates; 2 is a test sample; 3 is a cantilever crane I; 4 is a transport roller group I; 5 is a centering mechanism I; 6 is a C-type hook I; 7 is a car-bottom heating furnace I; 8 is an input / output roller group I; 9 is a roller quenching machine; 10 is an input / output roller group II; 11 is a car-bottom heating furnace II; 12 is a C-type hook II; 13 is a centering mechanism II; 14 is a transport roller group II; 15 is a cantilever crane II; 16 is a roller and a bracket; 17 is a cylinder clamping mechanism; 18 is a car-bottom; 19 is a forward high-pressure section; 20 is a reverse high-pressure section; 21 is a low-pressure section; 22 is a water supply pipeline; 23 is a control valve group; 24 is a movable frame; 25 is an upper row of rollers; 26 is a transmission system; 27 is a lower row of rollers. DETAILED DESCRIPTION

[0031] like Figure 1The present invention proposes a pilot plant for heat treatment of steel plates, which is composed of a cantilever crane I3, a transport roller group I4, a centering mechanism I5, a C-type hook I6, a car-bottom heating furnace I7, an input / output roller group I8, a roller quenching machine 9, an input / output roller group II10, a car-bottom heating furnace II11, a C-type hook II12, a centering mechanism II13, a transport roller group II14, and a cantilever crane II15. The roller quenching machine 9 is the center, and the mechanisms on both sides have the same functions and are arranged symmetrically to realize the functions of forward sample loading → sample normalizing heating → sample quenching → sample tempering → sample unloading, and reverse sample loading → sample normalizing heating → sample quenching → sample tempering → sample unloading. It can continuously and automatically realize the functions of sample loading centering, transfer, normalizing heating, quenching, tempering heating, slow cooling, etc. Among them:

[0032] The cantilever crane I3 and cantilever crane II15 are respectively installed at both ends of the steel plate heat treatment pilot device 1, and are used for hoisting the sample 2 for loading or unloading, and for overhauling the mechanical parts of the device.

[0033] The transport roller group I4 and the transport roller group II14 are symmetrically arranged at the outermost ends of both sides of the steel plate heat treatment pilot device 1, respectively, and are composed of multiple rollers and brackets 16, and adopt a centralized chain transmission method, with a roller speed range of 1 to 10 m / min. During forward heat treatment, the transport roller group I4 is used to realize the functions of loading, transporting, and positioning the sample 2, and the transport roller group II14 is used to realize the functions of unloading the sample 2 and swing cooling the sample 2 after tempering. During reverse quenching, the transport roller group II14 is used to realize the functions of loading, transporting, and positioning the sample 2, and the transport roller group I4 is used to realize the functions of unloading the sample 2 and swing cooling the sample 2 after tempering.

[0034] The centering mechanism I5 and the centering mechanism II13 are respectively installed on the transport roller group I4 and the transport roller group II14, and a cylinder clamping mechanism is used to realize the centering of the sample 2 on the transport roller group I4 or the transport roller group II14.

[0035] The C-type hook I6 is used to lift the sample 2. When the forward heat treatment is carried out, the sample 2 is transferred from the transport roller group I4 to the bottom 18 of the car-type heating furnace I7, and the sample 2 is transferred from the bottom 18 of the car-type heating furnace I7 to the input / output roller group I8. When the reverse heat treatment is carried out, the sample 2 is transferred from the input / output roller group I8 to the bottom 18 of the car-type heating furnace I7, and the sample 2 is transferred from the bottom 18 of the car-type heating furnace I7 to the transport roller group I4. The C-type hook II12 It is used to lift the sample 2. When the reverse heat treatment is realized, the sample 2 is transferred from the transport roller group II14 to the bottom 18 of the car-type heating furnace II11, and the sample 2 is transferred from the bottom 18 of the car-type heating furnace II11 to the input / output roller group II10. When the forward heat treatment is realized, the sample 2 is transferred from the input / output roller group II10 to the bottom 18 of the car-type heating furnace II11, and the sample 2 is transferred from the bottom 18 of the car-type heating furnace II11 to the transport roller group II14. The lifting mechanism of the C-type hook I6 and the C-type hook II12 adopts an electric cylinder lifting method, and the lifting is controlled by a servo control system; the transverse movement mechanism of the C-type hook I6 and the C-type hook II12 is driven by a servo control system to realize accurate and rapid transverse movement of the sample 2.

[0036] The car bottom heating furnace I7 and car bottom heating furnace II11 are arranged on one side of the pilot device 1, and the car bottom 18 is retractable to accommodate the sample 2 to be heated or the sample 2 to be lifted out after heating. Both the car bottom heating furnace I7 and the car bottom heating furnace II11 are dual-purpose normalizing / tempering furnaces, with a maximum operating furnace temperature of 1200°C, and the heating rate and insulation time can be automatically adjusted. The actions of the car bottom 18 extension and contraction, the furnace door switch, etc. are interlocked with the actions of the C-type hook I6 and the C-type hook II12 lifting or moving, so as to realize the automatic loading and unloading of the sample 2. During forward heat treatment, the car bottom heating furnace I7 performs the normalizing heating function, and the car bottom heating furnace II11 performs the tempering heating function. During reverse heat treatment, the car bottom heating furnace II11 performs the normalizing heating function, and the car bottom heating furnace I7 performs the tempering heating function.

[0037] The input / output roller table group I8 and the input / output roller table group II10 are used to connect the car-bottom heating furnace I7 or the car-bottom heating furnace II11 with the roller quenching machine 9, and receive and transfer the heated or quenched sample 2, and the roller speed range is 1 to 40 m / min. During the forward heat treatment, after the sample 2 is normalized and heated in the car-bottom heating furnace I7, it is transferred to the input / output roller table group I8 by the C-type hook I6. The input / output roller table group I8 transports the sample 2 to the roller quenching machine 9 for quenching and cooling at the same process speed as the roller quenching machine 9. The cooled sample 2 is transported to the input / output roller table group II10 at the same process speed as the roller quenching machine 9, and is transferred to the car-bottom heating furnace II11 by the C-type hook II12 for tempering and heating. During reverse heat treatment, after normalizing heating in the car-bottom heating furnace II11, the sample 2 is transferred to the input / output roller group II10 by the C-hook II12. The input / output roller group II10 transports the sample 2 to the roller quenching machine 9 for quenching and cooling at the same process speed as the roller quenching machine 9. The cooled sample 2 is transported to the input / output roller group I8 at the same process speed as the roller quenching machine 9, and is transferred to the car-bottom heating furnace I7 by the C-hook I6 for tempering heating.

[0038] like Figure 2 As shown, the roller quenching machine 9 is composed of a forward high-pressure section 19, a reverse high-pressure section 20, and a low-pressure section 21. The water supply pressure of the forward high-pressure section 19 and the reverse high-pressure section 20 is 10 bar, and the maximum water supply flow rate is 1000m 3 / h, low pressure section 21 water supply pressure 3 ~ 6bar, maximum water supply 800m 3 / h. The flow of each nozzle is controlled by the control valve group 23 on each branch water supply pipeline 22; the roller gap of the roller quenching machine 9 is controlled by the lifting of the mobile frame 24, which drives the upper roller 25 to lift and lower, and the roller gap adjustment range is 0 to 400mm; the upper roller 25 and the lower roller 27 of the roller quenching machine 9 are driven by the transmission system 26 to rotate, and the sample 2 is transferred to the specified position. The roller line speed range of the upper roller 25 and the lower roller 27 is 1 to 40m / min. During the forward heat treatment, after the sample 2 is transferred to the input / output roller group I8, the input / output roller group I8 transports the sample 2 into the roller quenching machine 9, passes through the forward high-pressure section 19, the low-pressure section 21 and the reverse high-pressure section 20 in turn, and is transported out of the roller quenching machine 9 by the input / output roller group II10. At this time, the reverse high-pressure section 20 is not put into use. During reverse heat treatment, after sample 2 is transferred to the input / output roller group II10, the input / output roller group II10 transports sample 2 to the roller quenching machine 9, passes through the reverse high-pressure section 20, the low-pressure section 21 and the forward high-pressure section 19 in sequence, and is transported out of the roller quenching machine 9 by the input / output roller group I8. At this time, the forward high-pressure section 19 is not put into use.

[0039] Take 50mm thick, 500mm wide, 700mm long high-strength structural steel plate Q960 as an example, combined with the attached Figure 1-2 , describing a specific implementation method of forward heat treatment of a pilot plant for heat treatment of steel plates. In the initial state, the C-hook I6 is positioned at the loading position of the transport roller group I4 and is in a descending state, the temperature of the car bottom heating furnace I7 rises to 920°C, the car bottom 18 is retracted, the roller quenching machine 9 moving frame 24 drives the upper row of rollers 25 to adjust the position, so that the roller gap value between the upper row of rollers 25 and the lower row of rollers 27 is 55mm, the C-hook II12 is positioned at the material receiving position of the input / output roller group II10 and is in a descending state, the temperature of the car bottom heating furnace II11 rises to 600°C, and the car bottom 18 is retracted.

[0040] When the heat treatment test starts, the sample 2 is hoisted by the cantilever crane I3 and placed on the transport roller group I4. The cylinder clamping mechanism 17 drives the centering mechanism I5 to realize the centering of the sample 2 on the transport roller group I4. Then the transport roller group I4 transports the sample 2 to the position of the C-hook I6 at a roller speed of 3m / min. At the same time, the bottom 18 of the car-type heating furnace I7 is extended. The C-hook I6 lifts the sample 2 and moves it up 200mm, then moves it horizontally to the top of the bottom 18 of the car-type heating furnace I7 in the extended position. The C-hook I6 drops 200mm, and the sample 2 is placed on the bottom 18 of the car-type heating furnace I7. The bottom 18 is retracted, and the sample 2 is normalized and heated in the car-type heating furnace I7.

[0041] After the sample 2 is heated in the car bottom heating furnace I7 for 105min, the car bottom 18 extends out, the C-type hook I6 lifts the sample 2 up 200mm, and then moves horizontally to the top of the input / output roller table group I8. The C-type hook I6 descends 200mm and places the sample 2 on the input / output roller table group I8. At the same time, the steel plate heat treatment pilot device 1 performs two actions simultaneously: ① the car bottom 18 of the car bottom heating furnace I7 is retracted, and the car bottom heating furnace I7 stops heating; ② the forward high pressure section 19 of the roller quenching machine 9 is supplied with water by the branch water supply pipeline 22, and the control valve group 23 controls the water volume to 900m 3 / h water pressure 10bar, roller quenching machine 9 low pressure section 21 is supplied with water by water supply pipeline 22, control valve group 23 controls the water volume to 700m 3 / h. After that, the sample 2 is carried by the input / output roller group I8 and enters the roller quenching machine 9 at a speed of 3m / min. It is carried by the lower roller 27 of the roller quenching machine 9, passes through the forward high-pressure section 19, the low-pressure section 21 and the non-open reverse high-pressure section 20 in sequence, and is transported to the corresponding position of the C-type hook II12 of the input / output roller group II10. While the sample 2 moves on the input / output roller group II10, the steel plate heat treatment pilot device 1 performs two actions at the same time: ① The bottom 18 of the car-type heating furnace II11 extends out, and the C-type hook II12 waits under the end of the input / output roller group II10; ② The water supply pipelines 22 of the forward high-pressure section 19 and the low-pressure section 21 of the roller quenching machine 9 are controlled to be closed by the control valve group 23, and the upper roller 25 and the lower roller 27 of the roller bottom quenching machine stop rotating.

[0042] When the sample 2 moves to above the C-hook II12, the input / output roller group II10 stops rotating, the C-hook II12 lifts the sample 2 and moves it up 200mm, then moves it horizontally to above the bottom 18 of the car-type heating furnace II11 in the extended position, the C-hook II12 descends 200mm, and the sample 2 is placed on the bottom 18 of the car-type heating furnace II11. The bottom 18 is retracted, and the sample 2 is tempered and heated in the car-type heating furnace II11.

[0043] After the sample 2 is heated in the car bottom heating furnace II11 for 160 minutes, the car bottom 18 extends out, the C-type hook II12 lifts the sample 2 up 200mm, and then moves horizontally to the top of the transport roller group II14. The C-type hook II12 drops 200mm, and the sample 2 is placed on the transport roller group II14. The transport roller group II14 runs forward and reverse at a speed of 3m / min, carrying the sample 2 to do a swinging motion. At the same time, the car bottom 18 of the car bottom heating furnace II11 is retracted, and the car bottom heating furnace II11 stops heating. Sample 2 swings on the transport roller group II14 until the temperature is below 100℃, and then the cantilever crane II15 lifts the sample 2 and places it at the designated position. At this point, the forward heat treatment of the 500mm wide and 700mm long high-strength structural steel plate Q960 is completed.

[0044] Similarly, we take 50mm thick, 500mm wide, 700mm long high-strength structural steel plate Q960 as an example, combined with the attached Figure 1-2 , describing a specific implementation method of reverse heat treatment of a pilot plant for heat treatment of steel plates. In the initial state, the C-hook II12 is positioned at the loading position of the transport roller group II14 and is in a descending state, the temperature of the car bottom heating furnace II11 rises to 920°C, the car bottom 18 is retracted, the roller quenching machine 9 moving frame 24 drives the upper row of rollers 25 to adjust the position, so that the roller gap value between the upper row of rollers 25 and the lower row of rollers 27 is 55mm, the C-hook I6 is positioned at the material receiving position of the input / output roller group I8 and is in a descending state, the temperature of the car bottom heating furnace I7 rises to 600°C, and the car bottom 18 is retracted.

[0045] When the heat treatment test starts, the sample 2 is hoisted by the cantilever crane II15 and placed on the transport roller group II14. The cylinder clamping mechanism 17 drives the centering mechanism II13 to center the sample 2 on the transport roller group II14. Then the transport roller group II14 transports the sample 2 to the position of the C-hook II12 at a roller speed of 3m / min. At the same time, the bottom 18 of the car-type heating furnace II11 is extended. The C-hook II12 lifts the sample 2 up 200mm and moves it horizontally to above the bottom 18 of the car-type heating furnace II11 in the extended position. The C-hook II12 descends 200mm and places the sample 2 on the bottom 18 of the car-type heating furnace II11. The bottom 18 is retracted and the sample 2 is normalized and heated in the car-type heating furnace II11.

[0046] After the sample 2 is heated in the car bottom heating furnace II11 for 105min, the car bottom 18 extends out, the C-type hook II12 lifts the sample 2 up 200mm, and then moves horizontally to the top of the input / output roller table group II10. The C-type hook II12 descends 200mm and places the sample 2 on the input / output roller table group II10. At the same time, the steel plate heat treatment pilot device 1 performs two actions simultaneously: ① the car bottom 18 of the car bottom heating furnace II11 is retracted, and the car bottom heating furnace II11 stops heating; ② the reverse high pressure section 20 of the roller quenching machine 9 is supplied with water by the branch water supply pipeline 22, and the control valve group 23 controls the water volume to 900m 3 / h water pressure 10bar, roller quenching machine 9 low pressure section 21 is supplied with water by water supply pipeline 22, control valve group 23 controls the water volume to 700m 3 / h. After that, the sample 2 is carried by the input / output roller group II10 and enters the roller quenching machine 9 at a speed of 3m / min. It is carried by the lower roller 27 of the roller quenching machine 9, passes through the reverse high-pressure section 20, the low-pressure section 21 and the non-opened forward high-pressure section 19 in sequence, and is transported to the corresponding position of the C-type hook I6 of the input / output roller group I8. While the sample 2 moves on the input / output roller group I8, the steel plate heat treatment pilot device 1 performs two actions at the same time: ① The bottom 18 of the car-type heating furnace I7 extends out, and the C-type hook I6 waits at the end of the input / output roller group I8; ② The water supply pipelines 22 of the reverse high-pressure section 20 and the low-pressure section 21 of the roller quenching machine 9 are closed by the control valve group 23, and the upper roller 25 and the lower roller 27 of the roller bottom quenching machine stop rotating.

[0047] When the sample 2 moves to the top of the C-hook I6, the input / output roller table group I8 stops rotating, the C-hook I6 lifts the sample 2 and moves it up 200 mm, then moves it horizontally to the top of the bottom 18 of the car-type heating furnace I7 in the extended position, the C-hook I6 descends 200 mm, and the sample 2 is placed on the bottom 18 of the car-type heating furnace I7. The bottom 18 is retracted, and the sample 2 is tempered and heated in the car-type heating furnace I7.

[0048] After the sample 2 is heated in the car bottom heating furnace I7 for 160 minutes, the car bottom 18 extends out, the C-type hook I6 lifts the sample 2 up 200mm, and then moves horizontally to the top of the transport roller group I4. The C-type hook I6 drops 200mm and places the sample 2 on the transport roller group I4. The transport roller group I4 runs forward and reverse at a speed of 3m / min, carrying the sample 2 to do a swinging motion. At the same time, the car bottom 18 of the car bottom heating furnace I7 is retracted and the car bottom heating furnace I7 stops heating. The sample 2 swings on the transport roller group I4 until the temperature is below 100℃, and the cantilever crane I3 lifts the sample 2 and places it at the designated position. At this point, the reverse heat treatment of the 500mm wide and 700mm long high-strength structural steel plate Q960 is completed.

Claims

1. A pilot plant for heat treatment of steel plates, characterized in that: The steel plate heat treatment pilot plant (1) is centered on a roller quenching machine (9), and the mechanisms on both sides have the same functions and are arranged symmetrically; the mechanisms on both sides respectively include a cantilever crane, a transport roller table group, a centering mechanism, a C-type hook, a car-bottom heating furnace and an input / output roller table group; the roller quenching machine (9), the input / output roller table group, the car-bottom heating furnace and the transport roller table group are arranged in sequence; the centering mechanism is arranged on the transport roller table group; the cantilever crane is used to hoist the sample (2); and the C-type hook is used to hoist the sample (2).

2. A steel plate heat treatment pilot plant according to claim 1, characterized in that: The transport roller set is symmetrically arranged at the outermost ends of both sides of the steel plate heat treatment pilot device (1), mainly composed of multiple rollers and brackets (16), adopts a centralized chain transmission method, and the roller speed range is 1 to 10 m / min.

3. The steel plate heat treatment pilot plant according to claim 1, characterized in that: The centering mechanism adopts cylinder clamping mechanisms (17) on both sides to center the sample (2) on the transport roller set.

4. The steel plate heat treatment pilot plant according to claim 1, characterized in that: The car bottom type heating furnace is arranged on one side of the steel plate heat treatment pilot device (1), and the car bottom (18) is retractable and used to receive the sample (2) to be heated or to be lifted out after being heated; the car bottom type heating furnace is a normalizing / tempering dual purpose furnace, with a maximum working furnace temperature of 1200°C, and the heating rate and insulation time can be automatically adjusted. The retractable movement of the car bottom (18) and the opening and closing action of the furnace door are interlocked with the lifting or moving action of the C-type hook, and are used to automatically load and remove the sample (2).

5. The steel plate heat treatment pilot plant according to claim 1, characterized in that: The lifting mechanism of the C-shaped hook adopts an electric cylinder lifting method, and the lifting is controlled by a servo control system; the transverse movement mechanism of the C-shaped hook is driven by a servo control system.

6. The steel plate heat treatment pilot plant according to claim 1, characterized in that: The input / output roller table group is used to connect the car bottom heating furnace and the roller quenching machine (9), receive and transfer the heated or quenched sample (2), and the roller speed range is 1 to 40 m / min.

7. A steel plate heat treatment pilot plant according to any one of claims 1 to 6, characterized in that: The roller quenching machine (9) is mainly composed of a forward high-pressure section (19), a reverse high-pressure section (20), and a low-pressure section (21). The water supply pressure of the forward high-pressure section (19) and the reverse high-pressure section (20) is 10 bar, and the maximum water supply flow rate is 1000m 3 / h, low pressure section (21) water supply pressure 3 ~ 6bar, maximum water supply 800m 3 / h; the flow rate of each nozzle is controlled by a control valve group (23) on each branch water supply pipeline (22); the upper row of rollers (25) of the roller quenching machine (9) are connected to a mobile frame (24), and the mobile frame (24) is controlled to rise and fall to drive the upper row of rollers (25), thereby controlling the roller gap of the roller quenching machine (9), and the roller gap adjustment range is 0 to 400 mm; the transmission system (26) is respectively connected to the upper row of rollers (25) and the lower row of rollers (27) to drive the two to rotate, and transfer the sample (2) to a specified position; the roller line speed range of the upper row of rollers (25) and the lower row of rollers (27) is 1 to 40 m / min.

8. A method for using the steel plate heat treatment pilot plant according to any one of claims 1 to 7, characterized in that: The steel plate heat treatment pilot device can perform forward heat treatment and reverse heat treatment; the forward heat treatment process is: forward sample loading → sample normalizing heating → sample quenching → sample tempering → sample unloading; the reverse heat treatment process is: reverse sample loading → sample normalizing heating → sample quenching → sample tempering → sample unloading.

9. The method for using the steel plate heat treatment pilot plant according to claim 8, characterized in that: During the normal heat treatment, the transport roller group on one side is used to realize the loading, transportation and positioning of the sample (2); the transport roller group on one side transports the sample (2) to the position of the C-shaped hook on one side, and at the same time, the bottom (18) of the car bottom type heating furnace on one side is extended, and the C-shaped hook on one side lifts the sample (2) and moves it upward and horizontally to the top of the bottom (18), and the sample (2) is placed on the bottom (18) of the car bottom type heating furnace, and the bottom (18) is retracted to perform normalizing heating; after normalizing heating, the bottom (18) is extended, and the sample (2) is After the C-hook on one side is transferred to the input / output roller table group on one side, two actions are performed simultaneously: ① the bottom of the car-type heating furnace on one side is retracted, and the heating of the car-type heating furnace on one side is stopped; ② the forward high-pressure section (19) and the low-pressure section (21) of the roller quenching machine (9) are supplied with water by the branch water supply pipeline (22), and the water volume and water pressure are controlled by the control valve group (23); the input / output roller table group on one side transports the sample (2) to the roller quenching machine (9) at the same process speed as the roller quenching machine (9) for quenching and cooling; The sample (2) passes through the forward high pressure section (19), the low pressure section (21) and the reverse high pressure section (20) in sequence, and is transported out of the roller quenching machine (9) by the input / output roller table group on the other side. At this time, the reverse high pressure section (20) is not put into use; the cooled sample (2) is transported to the input / output roller table group on the other side at the same process speed as the roller quenching machine (9); while the sample (2) moves on the input / output roller table group on the other side, two actions are performed: ① the bottom of the car-type heating furnace on the other side (18) is extended, and the C-type hook on the other side waits at the end of the input / output roller table group on the other side; ② the water supply pipelines (22) of the forward high pressure section (19) and the low pressure section (21) of the roller quenching machine (9) are closed by the control valve group (23), and the upper roller (25) and the lower roller (27) stop rotating; When the sample (2) moves to above the C-hook on the other side, the input / output roller group on the other side stops rotating; the sample (2) is lifted and moved upward and horizontally to above the vehicle bottom (18) in the extended position, and the C-hook on the other side places the sample (2) on the vehicle bottom (18), the vehicle bottom (18) is retracted, and the sample (2) is tempered and heated in the vehicle bottom heating furnace on the other side; the sample (2) is transferred from the vehicle bottom heating furnace on the other side to the transport roller group on the other side; the transport roller group on the other side is used to realize the unloading of the sample (2) and the swing cooling of the sample (2) after tempering.

10. The method for using the pilot plant for heat treatment of steel plates according to claim 8, characterized in that: During the reverse heat treatment, the transport roller group on the other side is used for loading, transporting and positioning the sample (2); the transport roller group on the other side transports the sample (2) to the position of the C-shaped hook on the other side, and at the same time, the bottom (18) of the car bottom type heating furnace on the other side is extended, and the C-shaped hook on the other side lifts the sample (2) and moves it upward and horizontally to the top of the bottom (18) in the extended position, and the C-shaped hook on the other side places the sample (2) on the bottom (18) of the car bottom type heating furnace on the other side, and the bottom (18) is retracted, and the sample (2) is normalized and heated in the bottom type heating furnace on the other side; the bottom type heating furnace on the other side is After the sample (2) is normalized and heated in the hot furnace, it is transferred from the C-hook on the other side to the input / output roller table group on the other side, and two actions are performed simultaneously: ① the bottom of the car-type heating furnace on the other side (18) is retracted, and the heating of the car-type heating furnace on the other side is stopped; ② the reverse high-pressure section (20) and low-pressure section (21) of the roller quenching machine (9) are supplied with water by the branch water supply pipeline (22), and the water volume and water pressure are controlled by the control valve group (23); the input / output roller table group on the other side transports the sample (2) to the roller quenching machine (9) for quenching and cooling at the same process speed as the roller quenching machine (9); The sample (2) passes through the reverse high-pressure section (20), the low-pressure section (21) and the forward high-pressure section (19) in sequence, and is transported out of the roller quenching machine (9) by the input / output roller table group on one side, and the forward high-pressure section (19) is not put into use at this time; The cooled sample (2) is transported to one side input / output roller table group at the same process speed as the roller quenching machine (9); while the sample (2) is moving on the one side input / output roller table group, two actions are performed simultaneously: ① the bottom of the car-type heating furnace (18) on one side is extended, and the C-type hook on one side is waiting at the end of the one side input / output roller table group; ② the reverse high-pressure section (20) and low-pressure section (21) water supply pipelines (22) of the roller quenching machine (9) are closed by the control valve group (23), and the upper row rollers (25) and lower row rollers (27) stop rotating; When the sample (2) moves to the top of the C-shaped hook on one side, the input / output roller group on one side stops rotating, the C-shaped hook on one side lifts the sample (2) and moves it upward and horizontally to the top of the bottom of the car-type heating furnace (18) on the extended position, the C-shaped hook on one side places the sample (2) on the bottom of the car-type heating furnace (18) on the one side, the bottom of the car (18) is retracted, and the sample (2) is tempered and heated in the bottom of the car-type heating furnace on one side; the sample (2) is transferred from the bottom of the car-type heating furnace (18) on the one side to the transport roller group on one side; the transport roller group on one side is used to realize the unloading of the sample (2) and the swing cooling of the sample (2) after tempering.

Images