Hot-rolled high-strength steel for automobiles and preparation equipment and method
Through smelting, rolling, cleaning rollers to clean dust and winding equipment with adjustable limit rings, the problems of inflexible limiting and dust corrosion of existing winding mechanisms are solved, and the effective storage and corrosion protection of high-strength steel strips are achieved.
Patent Information
- Application Number
- CN202510940542.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-09
- Publication Date
- 2025-09-12
AI Technical Summary
The existing winding mechanism cannot adjust the position of the limit ring, resulting in only limiting the position of steel strips of the same size, which reduces the reuse rate. At the same time, dust and impurities on the steel strip are prone to corrosion damage after winding.
A preparation method for hot-rolled high-strength steel for automobiles was designed, including smelting, rolling, cleaning of dust by cleaning rollers, and winding roller storage. The preparation equipment was combined with an adjustable limit ring to ensure the limiting and dust cleaning of steel strips of different widths.
It realizes effective positioning and dust cleaning of steel strips of different widths, avoids corrosion damage to the steel strips during storage, and improves the reuse rate of the winding mechanism.
Smart Images
Figure CN120619092A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of steel material production, and in particular to hot-rolled high-strength steel for automobiles, and a preparation device and method thereof. Background Art
[0002] Body parts made of high-strength steel can not only effectively reduce the weight of the vehicle and reduce fuel consumption, but also improve the comfort and safety of the vehicle. Therefore, hot-rolled high-strength steel is usually used to prepare related parts of the vehicle during the automobile production process. After the existing hot-rolled high-strength steel is prepared, a winding mechanism is required to coil the obtained steel strip for easy storage.
[0003] When the winding roller on the existing winding mechanism is winding the steel strip, a limit ring is needed to limit the steel strip. However, the position of the limit ring cannot be adjusted, so that the limit ring can only limit the steel strips of the same size and cannot limit the steel strips of different widths, thereby reducing the reuse rate of the winding mechanism.
[0004] Existing steel strips are directly coiled and stored after production is completed. Dust and other impurities that are contaminated on the steel strips during processing are also coiled together, making the steel strips susceptible to corrosion and damage by dust and other impurities during long-term storage. Summary of the Invention
[0005] The purpose of the present invention is to provide a hot-rolled high-strength steel for automobiles, a preparation device and a method, which solves the technical problem that the existing steel strips are directly coiled and stored after production is completed, and dust and other impurities contaminated on the steel strips during the processing are also coiled together, so that the steel strips are easily corroded and damaged by dust and other impurities attached to the steel strips during long-term storage.
[0006] To achieve the above object, the present invention provides a method for preparing hot-rolled high-strength steel for automobiles, comprising the following steps:
[0007] Molten steel is smelted and then cast into strip for rolling after refining;
[0008] The cast strip is heated, initially rolled, finally rolled, water-cooled after rolling, slowly cooled, and then air-cooled to obtain a hot-rolled high-strength steel strip for automobiles;
[0009] The obtained steel strip is conveyed by a conveyor belt. When the steel strip is conveyed to the bottom of a cleaning roller, the cleaning roller is rotated to clean the dust and other impurities attached to the steel strip;
[0010] After the cleaning roller cleans the dust and other impurities attached to the steel strip, the steel strip continues to be conveyed;
[0011] When the steel strip is conveyed to the vicinity of the winding roller, the front end portion of the steel strip is adhered to the winding roller, and then the winding roller is rotated, thereby driving the steel strip to be wound on the winding roller, thereby realizing the winding and storage of the steel strip.
[0012] The present invention also provides a preparation device for hot-rolled high-strength steel for automobiles, including a conveyor belt, a roller is provided on the inner side of the conveyor belt, the roller is slidingly connected to the conveyor belt, and a fixed frame is provided on the outer side of the roller, the fixed frame is rotatably connected to the roller.
[0013] Wherein, a base is provided below the fixing frame, and the base is fixedly installed on the lower surface of the fixing frame.
[0014] Wherein, a rotating rod and a control motor are provided on the outside of the cleaning roller, and the rotating rod is fixedly installed on the side of the cleaning roller away from the conveyor belt; the output end of the control motor is connected to the rotating rod and fixedly installed on the upper surface of the base.
[0015] Wherein, a rotating shaft and a rotating motor are provided on the outside of the winding roller, and the rotating shaft is fixedly connected to the winding roller; the output end of the rotating motor is connected to the rotating shaft and fixedly mounted on the upper surface of the base.
[0016] The present invention also provides a hot-rolled high-strength steel for automobiles, which is produced by the above-mentioned equipment for producing hot-rolled high-strength steel for automobiles.
[0017] The hot-rolled high-strength steel comprises the following composition in weight percentage: 0.03% to 0.06% carbon, 1.50% to 1.70% manganese, 0.15% to 0.25% silicon, 0.07% to 0.13% titanium, 0.05% to 0.12% molybdenum, 0.025% to 0.050% aluminum, 0.005% to 0.015% phosphorus, 0.005% to 0.012% sulfur and the remainder iron.
[0018] The high-strength steel has a tensile strength of 670 MPa to 800 MPa and an elongation of 18% to 23%.
[0019] The present invention relates to a hot-rolled high-strength steel for automobiles, a preparation device and a preparation method. After the steel strip is rolled, the steel strip is placed on the conveyor belt for conveyance. When the conveyor belt conveys the steel strip to the bottom of the cleaning roller, the cleaning roller is rotated, so that the bristles on the cleaning roller can clean the dust and other impurities attached to the steel strip conveyed by the conveyor belt, and then the steel strip is continued to be conveyed. When the steel strip is conveyed near the winding roller, the front end portion of the steel strip is adhered to the winding roller, and the winding roller is rotated, so that the winding roller can wind up and store the steel strip. The dust and other impurities attached to the steel strip are cleaned by the cleaning roller, thereby avoiding the dust and other impurities contaminated during the processing on the steel strip from being wound together, which will cause the dust and other impurities attached to the steel strip during long-term storage to cause corrosion and damage to the steel strip. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.
[0021] Figure 1 1 is a flowchart of the process steps of hot-rolled high-strength steel for automobiles according to the first embodiment of the present invention.
[0022] Figure 2 2 is a schematic diagram of the connection between the control motor and the rotating rod according to the second embodiment of the present invention.
[0023] Figure 3 1 is a schematic diagram of the connection between the fixing bolt and the fixing nut according to the second embodiment of the present invention.
[0024] In the figure: 101-base, 102-fixed frame, 103-roller, 104-conveyor belt, 105-control motor, 106-rotating rod, 107-cleaning roller, 108-rotating motor, 109-rotating shaft, 110-winding roller, 111-limiting ring, 112-fixing bolt, 113-fixing nut. DETAILED DESCRIPTION
[0025] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.
[0026] First embodiment:
[0027] See also Figure 1 ,in Figure 1 1 is a process flow chart of a first embodiment of the present invention for producing hot-rolled high-strength steel for automobiles. The present invention provides a method for producing hot-rolled high-strength steel for automobiles, comprising the following steps:
[0028] S101, smelting molten steel, casting it into strip after refining and rolling;
[0029] S102, heating the cast strip, performing start rolling, final rolling, water cooling after rolling, slow cooling, and then air cooling, to finally obtain a hot-rolled high-strength steel strip for automobiles;
[0030] S103, using the conveyor belt 104 to convey the obtained steel strip. When the steel strip is conveyed to the bottom of the cleaning roller 107, the cleaning roller 107 is rotated to clean the dust and other impurities attached to the steel strip.
[0031] S104: After the cleaning roller 107 cleans the dust and other impurities attached to the steel strip, the steel strip continues to be conveyed;
[0032] S105. When the steel strip is conveyed to the vicinity of the winding roller 110, the front end portion of the steel strip is adhered to the winding roller 110, and then the winding roller 110 is rotated, thereby driving the steel strip to be wound on the winding roller 110, thereby achieving the winding and storage of the steel strip.
[0033] When using the preparation method of hot-rolled high-strength steel for automobiles of the present embodiment, the molten steel after the proportioning is completed is smelted, cast after smelting, and after being cast into a cast strip, the cast strip is heated, started rolling, final rolling, water-cooled after rolling, slowly cooled, and then air-cooled to finally obtain a hot-rolled high-strength steel strip for automobiles. The obtained steel strip is conveyed to the bottom of the cleaning roller 107, and the cleaning roller 107 is rotated so that the cleaning roller 107 can clean the dust and other impurities attached to the steel strip. After cleaning, the steel strip is continuously conveyed. When the steel strip is near the winding roller 110 of the conveyor belt 104, the front end of the steel strip is adhered to the winding roller 110, and then the winding roller 110 is rotated so that the steel strip can be wound on the winding roller 110, thereby realizing the winding and storage of the steel strip.
[0034] Second embodiment:
[0035] Based on the first embodiment, please refer to Figure 2 and Figure 3 , Figure 2 1 is a schematic diagram showing the connection between the control motor 105 and the rotating rod 106 according to the second embodiment of the present invention. Figure 3 It is a connection diagram of a fixing bolt 112 and a fixing nut 113. The present invention also provides a preparation device for hot-rolled high-strength steel for automobiles, including a base 101, a fixing frame 102, a roller 103, a conveyor belt 104, a control motor 105, a rotating rod 106, a cleaning roller 107, a rotating motor 108, a rotating shaft 109, a winding roller 110, a limiting ring 111, a fixing bolt 112 and a fixing nut 113.
[0036] Among them, a roller 103 is provided on the inner side of the conveyor belt 104, and the roller 103 is slidingly connected to the conveyor belt 104. A fixed frame 102 is provided on the outer side of the roller 103, and the fixed frame 102 is rotatably connected to the roller 103. The roller 103 is connected to the starting motor through a belt, and the starting motor and the belt are hidden on the inner side of the conveyor belt 104. The power output from the output end of the starting motor drives the belt to rotate, so that the roller 103 rotates on the fixed frame 102. Through the rotation of the roller 103 on the fixed frame 102, the conveyor belt 104 can be driven to slide on the roller 103, and then the steel belt can be transmitted on the conveyor belt 104.
[0037] Secondly, a base 101 is provided below the fixing frame 102 . The base 101 is fixedly mounted on the lower surface of the fixing frame 102 , so that the base 101 can support the fixing frame 102 .
[0038] Again, a rotating rod 106 and a control motor 105 are provided on the outside of the cleaning roller 107. The rotating rod 106 is fixedly installed on the side of the cleaning roller 107 away from the conveyor belt 104; the output end of the control motor 105 is connected to the rotating rod 106 and is fixedly installed on the upper surface of the base 101. The output end of the control motor 105 is connected to the rotating rod 106 and drives the rotating rod 106 to rotate, thereby driving the cleaning roller 107 to rotate. Bristles are evenly distributed on the cleaning roller 107, so that the rotation of the cleaning roller 107 can drive the bristles of the cleaning roller 107 to rotate, and then the bristles of the cleaning roller 107 can clean the dust and other impurities attached to the conveyed steel belt.
[0039] At the same time, a rotating shaft 109 and a rotating motor 108 are provided on the outside of the winding roller 110, and the rotating shaft 109 is fixedly connected to the winding roller 110; the output end of the rotating motor 108 is connected to the rotating shaft 109 and is fixedly installed on the upper surface of the base 101, and the output end of the rotating motor 108 is connected to the rotating shaft 109 and drives the rotating shaft 109 to rotate, thereby driving the winding roller 110 to rotate, and then the winding roller 110 can wind up the steel strip.
[0040] In addition, a limiting ring 111 is provided on the outside of the winding roller 110. The limiting ring 111 is slidably connected to the winding roller 110. The limiting ring 111 can slide laterally on the winding roller 110. There are two limiting rings 111, which are respectively located on the left and right sides of the limiting ring 111, so that the limiting ring 111 can limit the steel strip wound on the winding roller 110 to avoid the steel strip from deviating during the winding process.
[0041] Finally, a fixing bolt 112 and a fixing nut 113 are provided on the side of the limiting ring 111 close to the winding roller 110. The fixing bolt 112 is slidably connected to the limiting ring 111 and is detachably connected to the winding roller 110, and passes through the limiting ring 111 and the winding roller 110; the fixing nut 113 is detachably connected to the fixing bolt 112 and is sleeved on the outside of the fixing bolt 112. Circular through holes are evenly distributed on the winding roller 110, and the limiting ring 111 has a circular through hole. The size of the circular through hole of the winding roller 110 is consistent with the size of the circular through hole of the limiting ring 111. The fixing bolt 112 passes through the circular through holes of the winding roller 110 and the limiting ring 111, and the fixing nut 113 is threadedly connected to the fixing bolt 112, so that the fixing nut 113 can be tightened or loosened on the fixing bolt 112.
[0042] When using a preparation method of hot-rolled high-strength steel for automobiles according to the present embodiment, the molten steel after the proportioning is completed is smelted, cast after smelting, and after being cast into a cast strip, the cast strip is heated, started rolling, final rolling, water-cooled after rolling, slowly cooled, and then air-cooled to finally obtain a hot-rolled high-strength steel strip for automobiles. The position of the limiting ring 111 outside the winding roller 110 is adjusted according to the width of the obtained steel strip. When the position of the limiting ring 111 is adjusted to the required position, the fixing bolt 112 is inserted into the circular through holes of the winding roller 110 and the limiting ring 111, and the fixing nut 113 is tightened on the outside of the fixing bolt 112, so that the limiting ring 111 is in the position of the winding roller 110. 0 is limited and fixed, the starting motor hidden in the conveyor belt 104 is started, so that the output end of the starting motor drives the belt to rotate, thereby causing the roller 103 to rotate on the fixed frame 102, and then the conveyor belt 104 can convey the steel belt placed on the conveyor belt 104. When the conveyor belt 104 conveys the steel belt to the bottom of the cleaning roller 107, the control motor 105 is started, so that the power output by the output end of the control motor 105 drives the rotating rod 106 to rotate, thereby driving the cleaning roller 107 to rotate, and then the bristles on the cleaning roller 107 can clean the dust and other impurities attached to the steel belt conveyed by the conveyor belt 104. The material is cleaned, and after the cleaning is completed, the steel strip is continued to be conveyed. When the steel strip is conveyed near the winding roller 110, the front end of the steel strip is adhered to the winding roller 110, and then the rotating motor 108 is started, so that the power output by the output end of the rotating motor 108 drives the rotating shaft 109 to rotate, thereby causing the winding roller 110 to rotate. Through the rotation of the winding roller 110, the steel strip can be wound on the winding roller 110. Since the limiting ring 111 is fixed to the outside of the winding roller 110, the limiting ring 111 can limit the steel strip wound by the winding roller 110, thereby avoiding the steel strip from being wound on the winding roller 110. The position of the limit ring 111 is adjusted according to the width of the steel strip, so that the limit ring 111 can be fixed to the outside of the winding roller 110, so that the steel strips of different widths can be wound and stored on the winding roller 110. The dust and other impurities attached to the steel strip are cleaned by the cleaning roller 107.This prevents the steel strip from being rolled up with dust and other impurities that are contaminated during processing, which can lead to corrosion and damage to the steel strip during long-term storage.
[0043] Third embodiment:
[0044] Based on the second embodiment, the present invention also provides a hot-rolled high-strength steel for automobiles, comprising the following composition in weight percentage: 0.03% to 0.06% carbon, 1.50% to 1.70% manganese, 0.15% to 0.25% silicon, 0.07% to 0.13% titanium, 0.05% to 0.12% molybdenum, 0.025% to 0.050% aluminum, 0.005% to 0.015% phosphorus, 0.005% to 0.012% sulfur and iron balance.
[0045] Among them, the high-strength steel has a tensile strength of 670MPa to 800MPa and an elongation of 18% to 23%. By adding less alloy elements and taking ferrite and granular bainite as the matrix, the maximum effects of fine grain strengthening and precipitation strengthening are exerted, and finally a high-strength steel for automobiles with a tensile strength of 670MPa to 800MPa, an elongation of 18% to 23%, and good hole expansion performance can be obtained, which meets the requirements of lightweight automobiles and is suitable for the process performance of automobile beam steel.
[0046] When using the method for preparing hot-rolled high-strength steel for automobiles according to this embodiment, the raw material concentrations for preparing the hot-rolled high-strength steel for automobiles are adjusted to: 0.05% carbon, 1.70% manganese, 0.2% silicon, 0.1% titanium, 0.08% molybdenum, 0.035% aluminum, 0.01% phosphorus, and 0.009% sulfur. During the preparation of the hot-rolled high-strength steel for automobiles, the relatively inexpensive element Ti is used as a strengthening element, and a trace amount of Mo is added to achieve a maximum combination of fine grain strengthening, precipitation strengthening, and phase transformation strengthening, ensuring that the steel has a tensile strength of greater than or equal to 670 MPa while possessing excellent plasticity and toughness.
[0047] The above disclosure is merely one or more preferred embodiments of the present application and is not intended to limit the scope of the present application. A person skilled in the art will understand that all or part of the processes of the above embodiments and equivalent changes made in accordance with the claims of the present application are still within the scope of the present application.
Claims
1. A method for preparing hot-rolled high-strength steel for automobiles, characterized in that: The following steps are involved: Molten steel is smelted and then cast into strip for rolling after refining; The cast strip is heated, initially rolled, finally rolled, water-cooled after rolling, slowly cooled, and then air-cooled to obtain a hot-rolled high-strength steel strip for automobiles; The obtained steel strip is conveyed by a conveyor belt. When the steel strip is conveyed to the bottom of a cleaning roller, the cleaning roller is rotated to clean the dust and other impurities attached to the steel strip; After the cleaning roller cleans the dust and other impurities attached to the steel strip, the steel strip continues to be conveyed; When the steel strip is conveyed to the vicinity of the winding roller, the front end portion of the steel strip is adhered to the winding roller, and then the winding roller is rotated, thereby driving the steel strip to be wound on the winding roller, thereby realizing the winding and storage of the steel strip.
2. A production equipment for hot-rolled high-strength steel for automobiles, using the production method for hot-rolled high-strength steel for automobiles according to claim 1, characterized in that: Including conveyor belt, A roller is provided on the inner side of the conveyor belt, and the roller is slidably connected to the conveyor belt. A fixing frame is provided on the outer side of the roller, and the fixing frame is rotatably connected to the roller.
3. The production equipment for hot-rolled high-strength steel for automobiles according to claim 2, characterized in that: A base is provided below the fixing frame, and the base is fixedly installed on the lower surface of the fixing frame.
4. The production equipment for hot-rolled high-strength steel for automobiles according to claim 3, characterized in that: A rotating rod and a control motor are provided on the outside of the cleaning roller. The rotating rod is fixedly mounted on the side of the cleaning roller away from the conveyor belt. The output end of the control motor is connected to the rotating rod and fixedly mounted on the upper surface of the base.
5. The production equipment for hot-rolled high-strength steel for automobiles according to claim 3, characterized in that: A rotating shaft and a rotating motor are provided on the outside of the winding roller, and the rotating shaft is fixedly connected to the winding roller; the output end of the rotating motor is connected to the rotating shaft and is fixedly mounted on the upper surface of the base.
6. A hot-rolled high-strength steel produced by the production equipment for hot-rolled high-strength steel for automobiles according to any one of claims 2 to 5.
7. The hot-rolled high-strength steel according to claim 6, characterized in that: The hot-rolled high-strength steel comprises the following composition in weight percentage: 0.03% to 0.06% carbon, 1.50% to 1.70% manganese, 0.15% to 0.25% silicon, 0.07% to 0.13% titanium, 0.05% to 0.12% molybdenum, 0.025% to 0.050% aluminum, 0.005% to 0.015% phosphorus, 0.005% to 0.012% sulfur and the balance iron.
8. The hot-rolled high-strength steel for automobiles according to claim 7, wherein: The high-strength steel has a tensile strength of 670 MPa to 800 MPa and an elongation of 18% to 23%.