Online water cooling device for eliminating precipitated phase of super dual-phase steel hot-rolled round steel
Through the design of the online water -cooled device, the combination of steel runway, step -by -step cold bed and solid -soluble pool solves the problem of the phase of super double steel during the heat processing process, and realizes the rapid cooling and precipitated phase of round steel. Elimination, reduced energy consumption and production costs.
Patent Information
- Application Number
- CN202323437353.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-15
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2033-12-15
AI Technical Summary
Super duplex steel is prone to brittle precipitation phases during hot processing, resulting in stress cracking and difficult to perform cold processing. The existing offline solution treatment is low efficiency, high energy consumption and high cost.
A kind of online water -cooled device is designed to achieve the rapid and uniform cooling of round steel through the combination of steel runway, step -by -step cold bed and solid -soluble pool, eliminating the precipitation phase, and reducing the subsequent offline solid -soluble processes.
The round steel was quickly cooled from 1020 ° C to less than 600 ° C within 1 minute, eliminating the precipitated phase, reducing energy consumption and production costs, and improving the convenience and product quality of cold processing.
Smart Images
Figure CN222411673U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a processing device for hot-rolled round steel of dual-phase steel, in particular to an online water cooling device for eliminating precipitation phase of hot-rolled round steel of super dual-phase steel. Background Art
[0002] Super duplex steel has strong seawater corrosion resistance, and its pitting coefficient is ≥40. The steel grades are S32750 / S32760, which are widely used in the manufacture of seamless pipes and machining. However, this type of steel is very easy to produce precipitation phases during hot working. The precipitation phases are brittle phases and will precipitate at different speeds on the grain boundaries in the range of 800-950℃, generating stress, which will cause stress cracking in the subsequent cold working process and make it difficult to cold work. Only by first performing offline solid solution treatment on the round steel and eliminating the precipitation phases in the group can it be ensured that the duplex steel is not prone to stress cracking in the subsequent cold working process, which is convenient for subsequent cold working and ensures product quality.
[0003] However, the currently used cold working offline solution treatment requires the steel to be cooled and then heated and annealed separately. There are many processing steps, and the cooling, heating and annealing of the steel take a long time and have low efficiency, resulting in high processing energy consumption and high production costs. Utility Model Content
[0004] The purpose of the utility model is to provide an online water cooling device for eliminating the precipitation phase of hot-rolled round steel of super dual-phase steel. The utility model has the characteristics of saving processing time, reducing energy consumption and cost.
[0005] The technical solution of the utility model is: an online water cooling device for eliminating the precipitation phase of hot-rolled round steel of super duplex steel, comprising a steel running track, a walking cooling bed and a solid solution water pool arranged in sequence, a collecting rack is arranged outside the solid solution water pool, a first lifting device is arranged between the solid solution water pool and the walking cooling bed, a second lifting device is arranged between the solid solution water pool and the collecting rack, the first lifting device is used to put the round steel into the solid solution water pool for water cooling, and the second lifting device is used to transfer the round steel on the first lifting device to the collecting rack.
[0006] In the aforementioned online water cooling device for eliminating precipitation phase of hot-rolled round steel of super dual-phase steel, an arc-shaped transition plate is provided between the steel passing track and the walking cooling bed.
[0007] In the aforementioned online water cooling device for eliminating precipitation phase of hot-rolled round steel of super dual-phase steel, a baffle assembly is provided at the tail end of the steel passing track.
[0008] In the aforementioned online water cooling device for eliminating precipitation phase of hot-rolled round steel of super dual-phase steel, the baffle assembly includes a fixed seat, and the baffle facing the steel running track is connected to the fixed seat via a spring.
[0009] In the aforementioned online water cooling device for eliminating the precipitation phase of super dual-phase steel hot-rolled round steel, the stepping cooling bed includes a fixed rack and a movable rack distributed in parallel, the fixed rack is installed on a fixed base, the movable rack is installed on a movable base, the movable base is connected to the eccentric wheel of the eccentric transmission shaft, and the eccentric transmission shaft is installed on a bearing seat and driven by a stepping motor.
[0010] In the aforementioned online water cooling device for eliminating the precipitation phase of hot-rolled round steel of super dual-phase steel, the first lifting device and the second lifting device both include a lifting shaft, on which a plurality of lifting hooks are provided, the lifting hooks of the first lifting device and the lifting hooks of the second lifting device are staggered and relatively distributed, and a transmission connecting rod is also provided on the lifting shaft, one end of the transmission connecting rod is fixedly connected to the lifting shaft, and the other end of the transmission connecting rod is hinged to the movable shaft of the hydraulic cylinder.
[0011] In the aforementioned online water cooling device for eliminating precipitation phase of hot-rolled round steel of super dual-phase steel, the transmission connecting rod and the lifting hook are distributed at 90 degrees.
[0012] In the aforementioned online water cooling device for eliminating precipitation phase of hot-rolled round steel of super duplex steel, a first temperature detector is provided at the steel passing track; and a second temperature detector is provided at the tail of the walking cooling bed.
[0013] In the aforementioned online water cooling device for eliminating precipitation phase of hot-rolled round steel of super duplex steel, the solid solution water pool is provided with a water inlet pipe and a water outlet pipe, and the water inlet pipe and the water outlet pipe are both provided with solenoid valves.
[0014] In the aforementioned online water cooling device for eliminating precipitation phase of hot-rolled round steel of super dual-phase steel, a third temperature detector is provided in the solid solution water pool, and the third temperature detector is connected to the solenoid valve via a signal line.
[0015] Compared with the prior art, the beneficial effects of the utility model are:
[0016] The utility model designs an online water cooling device. The hot-rolled round steel products are directly conveyed through the steel runway, the walking cooling bed and the first lifting device, and are completely immersed in the water of the solid solution pool for rapid and uniform cooling, so that the round steel is rapidly cooled from 1020°C to below 600°C within 1 minute, realizing online solid solution heat treatment, avoiding the situation where the round steel is cooled for too long at 800-950°C to produce precipitation phase structure, eliminating the precipitation phase, reducing the subsequent offline solid solution process, and reducing energy consumption and production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of the utility model;
[0018] Figure 2 It is a structural schematic diagram of a walking cooling bed;
[0019] Figure 3 It is a schematic diagram of the structure of the first lifting device and the second lifting device.
[0020] The markings in the attached drawings are: 1. Steel runway; 11. Transition plate; 12. First temperature detector; 2. Step cooling bed; 21. Fixed rack; 22. Movable rack; 23. Fixed base; 24. Movable base; 25. Eccentric wheel; 26. Eccentric transmission shaft; 27. Second temperature detector; 3. Solid solution water tank; 31. Water inlet pipe; 32. Water outlet pipe; 33. Solenoid valve; 34. Third temperature detector; 35. Collection rack; 41. First lifting device; 42. Second lifting device; 43. Lifting shaft; 44. Lifting hook; 45. Hydraulic cylinder; 46. Transmission connecting rod; 51. Fixed seat; 52. Spring; 53. Baffle; 6. Round steel. DETAILED DESCRIPTION
[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.
[0022] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0023] Example:
[0024] like Figure 1-Figure 3 As shown, an online water cooling device for eliminating precipitation phase of hot-rolled round steel of super duplex steel comprises a steel runway 1, a walking cooling bed 2 and a solid solution water pool 3 which are arranged in sequence. The solid solution water pool 3 is filled with cooling water and is provided with an inlet pipe 31 and an outlet pipe 32. A collecting rack 35 is provided outside the solid solution water pool 3. A first lifting device 41 is provided between the solid solution water pool 3 and the walking cooling bed 2. A second lifting device 42 is provided between the solid solution water pool 3 and the collecting rack 35. The first lifting device 41 is used to put the round steel 6 into the solid solution water pool 3 for water cooling. The second lifting device 42 is used to transfer the round steel 6 on the first lifting device 41 to the collecting rack 35.
[0025] The steel track 1 is composed of a plurality of rollers driven by a motor, and gaps are left between adjacent rollers for the stepping cooling bed 2 to work. The steel track 1 is provided to convey round steel 6 under the action of rollers and motors; the stepping cooling bed 2 is provided to drive the stepping motor so that the movable rack 22 performs stepping motion, and the round steel 6 on the steel track 1 is transferred to the stepping cooling bed 2, and further transported to the first lifting device 41; the first lifting device 41 is provided to put the round steel 6 into the solid solution water pool 3 and immerse it in water for cooling, and the second lifting device 42 is provided to transfer the round steel 6 on the first lifting device 41 after cooling to the collection rack 35.
[0026] The hot-rolled round steel product is directly transported by the steel runway 1, the stepping cooling bed 2, and the first lifting device 41, and is completely immersed in the cooling water of the solid solution pool 3 for rapid and uniform cooling, so that the round steel 6 is rapidly cooled from 1020°C to below 600°C within 1 minute, realizing online solid solution heat treatment, avoiding the situation where the round steel 6 is cooled for too long at 800-950°C to produce precipitation phase structure, eliminating the precipitation phase, reducing the subsequent offline solid solution process, and reducing energy consumption and production costs.
[0027] An arc-shaped transition plate 11 is provided between the steel running track 1 and the walking cooling bed 2. The arc-shaped plate is provided to buffer the round steel 6 to prevent the round steel 6 from being damaged by impact and affecting the surface quality.
[0028] A baffle assembly is provided at the tail end of the steel track 1. The baffle assembly is used to block and limit the position of the round steel 6, so that the round steel can be accurately transmitted, transferred and cooled, and at the same time, multiple round steels 6 are neatly arranged for easy collection in bundles.
[0029] As an implementation of the baffle assembly, the baffle assembly includes a fixing seat 51 , and a baffle 53 facing the steel runway 1 is connected to the fixing seat 51 via a spring 52 .
[0030] As another implementation of the baffle assembly, the baffle assembly includes a fixing plate, on which an elastic pad is provided facing the steel runway 1 .
[0031] The impact force transmitted by the round steel 6 is buffered by the spring 52 or the elastic pad.
[0032] The stepping cooling bed 2 includes a fixed rack 21 and a movable rack 22 which are arranged in parallel. The fixed rack 21 is mounted on a fixed base 23, and the movable rack 22 is mounted on a movable base 24. The movable base 24 is connected to an eccentric wheel 25 of an eccentric transmission shaft 26. The eccentric transmission shaft 26 is mounted on a bearing seat and driven by a stepping motor. When the eccentric transmission shaft 26 rotates under the drive of the stepping motor, the movable base 24 performs stepping motion under the drive of the eccentric wheel 25, thereby transferring the round steel 6 on the steel runway 1 to the stepping cooling bed 2 and transporting it.
[0033] The first lifting device 41 and the second lifting device 42 both include a lifting shaft 43, and a plurality of lifting hooks 44 are fixedly connected to the lifting shaft 43. The lifting hooks 44 of the first lifting device 41 and the lifting hooks 44 of the second lifting device 42 are staggered and relatively distributed. A transmission connecting rod 46 is also provided on the lifting shaft 43, one end of the transmission connecting rod 46 is fixedly connected to the lifting shaft 43, and the other end of the transmission connecting rod 46 is hinged to the movable shaft of the hydraulic oil cylinder 45. When the hydraulic oil cylinder 45 retracts the movable shaft, the lifting hook 44 is lowered, and when the movable shaft of the hydraulic oil cylinder 45 is extended, the lifting hook 44 is lifted, thereby achieving the acceptance and flipping of the round steel 6.
[0034] The transmission connecting rod 46 and the lifting hook 44 are arranged at 90 degrees.
[0035] The head and tail of the steel running track 1 are both provided with a first temperature detector 12, and the first temperature detector 12 measures the temperature of the round steel before entering the walking cooling bed 2; the tail of the walking cooling bed 2 is provided with a second temperature detector 27 corresponding to the first temperature detector 12, and the second temperature detector 27 is used to measure the temperature of the round steel before entering the solid solution water pool 3. The first temperature detector 12 and the second temperature detector 27 can be a temperature measuring gun.
[0036] The solid solution water pool 3 is provided with an inlet pipe 31 and an outlet pipe 32, and both the inlet pipe 31 and the outlet pipe 32 are provided with a solenoid valve 33. The inlet pipe 31 and the outlet pipe 32 allow circulating flowing water to be supplied in the solid solution water pool 3, thereby accelerating the cooling speed and effect; the solenoid valve 33 controls the water inlet and outlet of the inlet pipe 31 and the outlet pipe 32, and the control is convenient and intelligent.
[0037] The solid solution water pool 3 is provided with a third temperature detector 34, which is used to measure the temperature of cooling water in the solid solution water pool 3. The third temperature detector 34 is connected to the electromagnetic valve 33 via a signal line. The electromagnetic valve 33 controls the water flow rate of the water inlet pipe 31 according to the temperature measured by the third temperature detector 34 to ensure that the water temperature in the solid solution water pool 3 is lower than 60°C. The third temperature detector 34 can be a thermocouple.
[0038] Working principle: Hot rolled φ65-130 super dual-phase steel S32750 / S32760 round steel is driven by the steel runway 1, moves to the baffle assembly and is blocked by the limit. When the first temperature detector 12 detects that the round steel temperature is 1020-1050℃, the movable rack 22 of the stepping cooling bed 2 is driven by the stepping motor to move to the steel runway 1, and moves the round steel 6 on the steel runway 1 toward the first lifting device 41. When the second temperature detector 27 detects that the round steel temperature reaches 1020-1050℃, the movable rack 22 of the stepping cooling bed 2 moves to the steel runway 1. When the temperature is 1000-1030℃, the walking cooling bed 2 moves the round steel to the lifting hook 44 in the first lifting device 41; when the third temperature detector 34 detects that the cooling water temperature in the solid solution water pool 3 is less than 60℃, the lifting hook 44 of the first lifting device 41 puts the round steel 6 into the solid solution water pool 3 under the drive of the hydraulic cylinder 45, and immerses the round steel 6 in the cold water of the solid solution water pool 3 for cooling, while the round steel 6 is located above the lifting hook 44 of the second lifting device 42. After cooling, the lifting hook 44 in the second lifting device 42 lifts the round steel 6 on the first lifting device 41 under the drive of the hydraulic cylinder 45 and flips it to the collection rack 35 for collection and bundling.
[0039] After many tests and inspections, the surface temperature of the φ65-130 super duplex steel S32750 / S32760 round steel 6 was measured after being cooled for different times after entering the water pool. It was concluded that when the water temperature is ≤60℃, the surface temperature of the round steel 6 is lower than 600℃ within 60s of water cooling, which meets the actual process requirements.
[0040] The parts not described in detail in the present invention are prior art and thus will not be described in detail here.
Claims
1. An online water cooling device for eliminating precipitation phase of hot-rolled round steel of super dual-phase steel, characterized in that: The invention comprises a steel running track (1), a walking cooling bed (2) and a solid solution water pool (3) which are arranged in sequence. A collecting rack (35) is arranged outside the solid solution water pool (3). A first lifting device (41) is arranged between the solid solution water pool (3) and the walking cooling bed (2). A second lifting device (42) is arranged between the solid solution water pool (3) and the collecting rack (35). The first lifting device (41) is used to place round steel (6) into the solid solution water pool (3) for water cooling. The second lifting device (42) is used to transfer the round steel (6) on the first lifting device (41) to the collecting rack (35).
2. The online water cooling device for eliminating precipitation phase of hot-rolled round steel of super dual-phase steel according to claim 1, characterized in that: An arc-shaped transition plate (11) is provided between the steel running track (1) and the walking cooling bed (2).
3. The online water cooling device for eliminating precipitation phase of hot-rolled round steel of super dual-phase steel according to claim 1, characterized in that: A baffle assembly is provided at the rear end of the steel runway (1).
4. The online water cooling device for eliminating precipitation phase of hot-rolled round steel of super dual-phase steel according to claim 3, characterized in that: The baffle assembly comprises a fixing seat (51), and a baffle (53) facing the steel runway (1) is connected to the fixing seat (51) via a spring (52).
5. The online water cooling device for eliminating precipitation phase of hot-rolled round steel of super dual-phase steel according to claim 1, characterized in that: The step-type cooling bed (2) comprises a fixed rack (21) and a movable rack (22) which are arranged in parallel. The fixed rack (21) is mounted on a fixed base (23), and the movable rack (22) is mounted on a movable base (24). The movable base (24) is connected to an eccentric wheel (25) of an eccentric transmission shaft (26). The eccentric transmission shaft (26) is mounted on a bearing seat and driven by a stepping motor.
6. The online water cooling device for eliminating precipitation phase of hot-rolled round steel of super dual-phase steel according to claim 1, characterized in that: The first lifting device (41) and the second lifting device (42) both comprise a lifting shaft (43), a plurality of lifting hooks (44) are provided on the lifting shaft (43), the lifting hooks (44) of the first lifting device (41) and the lifting hooks (44) of the second lifting device (42) are staggered and relatively distributed, and a transmission connecting rod (46) is also provided on the lifting shaft (43), one end of the transmission connecting rod (46) is fixedly connected to the lifting shaft (43), and the other end of the transmission connecting rod (46) is hinged to the movable shaft of the hydraulic cylinder (45).
7. The online water cooling device for eliminating precipitation phase of hot-rolled round steel of super dual-phase steel according to claim 6, characterized in that: The transmission connecting rod (46) and the lifting hook (44) are arranged at an angle of 90 degrees.
8. The online water cooling device for eliminating precipitation phase of hot-rolled round steel of super dual-phase steel according to claim 1, characterized in that: A first temperature measuring device (12) is provided at the steel running track (1); and a second temperature measuring device (27) is provided at the tail of the walking cooling bed (2).
9. The online water cooling device for eliminating precipitation phase of hot-rolled round steel of super dual-phase steel according to claim 1, characterized in that: The solid solution water pool (3) is provided with a water inlet pipe (31) and a water outlet pipe (32), and both the water inlet pipe (31) and the water outlet pipe (32) are provided with a solenoid valve (33).
10. The online water cooling device for eliminating precipitation phase of hot-rolled round steel of super dual-phase steel according to claim 9, characterized in that: A third temperature detector (34) is provided in the solid solution water pool (3), and the third temperature detector (34) is connected to the electromagnetic valve (33) via a signal line.