Large-scale non-quenched-and-tempered steel rolling equipment and rolling production method thereof

A non-quenched and tempered steel, rolling equipment technology, applied in metal rolling, metal rolling, metal processing equipment and other directions, can solve the process temperature cooling rate is difficult to control, can not guarantee the structure and performance requirements, low toughness and mechanical properties and other problems, to achieve the effect of removing surface iron oxide scale and scratching defects of water tank, effectively controllable structure and performance, and good surface quality

Active Publication Date: 2018-07-06
安徽钢研新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Technical problems to be solved: This application mainly solves the problems of large-scale non-quenched and tempered steel microstructure and performance control in the prior art, and is prone to surface cracks, strong crack sen

Method used

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  • Large-scale non-quenched-and-tempered steel rolling equipment and rolling production method thereof
  • Large-scale non-quenched-and-tempered steel rolling equipment and rolling production method thereof
  • Large-scale non-quenched-and-tempered steel rolling equipment and rolling production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0048] Example 1:

[0049] like figure 1 , 2 As shown in , 3, a large-scale non-quenched and tempered steel rolling equipment includes a walking furnace 1, a high-pressure water descaling machine 2, a rough rolling unit 3, a 1# simple control cooling device 4, and a hot continuous rolling unit 7 , finishing rolling unit 8, 2# simple control cooling device 9, tail-cutting crank type flying shear 10, traverse mechanism 11, hot saw 12, cooling bed 13 and collection device 14; the walking heating furnace 1, high pressure Water descaling machine 2, rough rolling unit 3, 1# simple control cooling device 4, hot tandem rolling unit 7, finishing rolling unit 8, 2# simple control cooling device 9, tail-cutting crank type flying shear 10, traverse mechanism 11 , the hot saw 12, the cooling bed 13 and the collection device 14 are connected in sequence, the hot tandem rolling unit 7 is provided with a cutting head flying shear 6, the collection device 14 is located at the outlet of the c...

Example Embodiment

[0052] Example 2:

[0053] like figure 1 , 2 As shown in , 3, a large-scale non-quenched and tempered steel rolling equipment includes a walking furnace 1, a high-pressure water descaling machine 2, a rough rolling unit 3, a 1# simple control cooling device 4, and a hot continuous rolling unit 7 , finishing rolling unit 8, 2# simple control cooling device 9, tail-cutting crank type flying shear 10, traverse mechanism 11, hot saw 12, cooling bed 13 and collection device 14; the walking heating furnace 1, high pressure Water descaling machine 2, rough rolling unit 3, 1# simple control cooling device 4, hot tandem rolling unit 7, finishing rolling unit 8, 2# simple control cooling device 9, tail-cutting crank type flying shear 10, traverse mechanism 11 , the hot saw 12, the cooling bed 13 and the collection device 14 are connected in sequence, the hot tandem rolling unit 7 is provided with a cutting head flying shear 6, the collection device 14 is located at the outlet of the c...

Example Embodiment

[0057] Example 3:

[0058] like figure 1 , 2As shown in , 3, a large-scale non-quenched and tempered steel rolling equipment includes a walking furnace 1, a high-pressure water descaling machine 2, a rough rolling unit 3, a 1# simple control cooling device 4, and a hot continuous rolling unit 7 , finishing rolling unit 8, 2# simple control cooling device 9, tail-cutting crank type flying shear 10, traverse mechanism 11, hot saw 12, cooling bed 13 and collection device 14; the walking heating furnace 1, high pressure Water descaling machine 2, rough rolling unit 3, 1# simple control cooling device 4, hot tandem rolling unit 7, finishing rolling unit 8, 2# simple control cooling device 9, tail-cutting crank type flying shear 10, traverse mechanism 11 , the hot saw 12, the cooling bed 13 and the collection device 14 are connected in sequence, the hot tandem rolling unit 7 is provided with a cutting head flying shear 6, the collection device 14 is located at the outlet of the co...

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Abstract

The invention provides large-scale non-quenched-and-tempered steel rolling equipment and a rolling production method thereof. Through rolling with temperature control, the finish rolling temperature of large-scale non-quenched-and-tempered steel bars is controlled stably, low-temperature deformation is achieved, and grains are refined, so that plasticity and toughness are obviously improved whilethe high strength of large-scale non-quenched-and-tempered steel is ensured; and by intervening control cooling after rolling, precipitation strengthening, segregation strengthening and change of microstructure of micro alloying elements in large-scale non-quenched-and-tempered round steel are controlled, so that a stable metallographic structure and comprehensive mechanical properties are obtained. According to the rolling production method, the product surface quality is ensured, meanwhile, the defects that controlled rolling and controlled cooling cannot be achieved by a large-scale round steel production line; as for the large-scale non-quenched-and-tempered round steel obtained through the method, scratch on the surface of rolled pieces by a traditional water tank is avoided, oxidizedscale is controlled, and the surface quality of a rolled material is improved; and the mechanical property of the steel is stable, the requirements of controlled rolling and controlled cooling of thenon-quenched-and-tempered steel are met, and thus the mechanical property of the large-scale non-quenched-and-tempered steel is stabilized.

Description

technical field [0001] The invention relates to steel rolling equipment and a rolling method thereof, in particular to a large-scale non-quenched and tempered steel rolling equipment and a rolling production method thereof, belonging to the field of rolling processing of steel materials. Background technique [0002] Non-quenched and tempered steel is a new type of mechanical structural steel. Compared with the traditional, quenched and tempered mechanical structural steel, it has its own characteristics in terms of chemical composition, production process, mechanical properties, process performance and technical economy. Reference: Dong Chengrui et al., Microalloy Quenched and Tempered Steel, 2000.15. [0003] Since non-quenched and tempered steel avoids the quenching and tempering process in the machining process, it is particularly outstanding in reducing costs and increasing efficiency. It is the development direction of steel for automotive structural parts and has imp...

Claims

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Application Information

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IPC IPC(8): B21B1/02B21B1/04B21B45/02B21B37/74
CPCB21B1/026B21B1/04B21B37/74B21B45/0209
Inventor 陈子坤王启丞王忠英
Owner 安徽钢研新材料科技有限公司
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