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380 MPa grade automobile wheel steel hot rolling acid pickling plate and production method thereof

A hot-rolled pickling and production method technology, applied in metal rolling, metal rolling, rolling mill control devices, etc., can solve the problems of excessive surface scale, poor quality, low qualified rate of finished products, etc., and achieve good surface quality, The effect of reducing the generation of iron oxide scale and improving the welding performance

Inactive Publication Date: 2020-04-24
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a 380MPa-grade automobile wheel steel hot-rolled pickling plate and its production method, aiming at solving the problem that the current 380MPa-grade automobile wheel steel hot-rolled pickling plate has many oxide scales on the surface, poor quality and qualified finished products. low rate technical issues

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  • 380 MPa grade automobile wheel steel hot rolling acid pickling plate and production method thereof
  • 380 MPa grade automobile wheel steel hot rolling acid pickling plate and production method thereof
  • 380 MPa grade automobile wheel steel hot rolling acid pickling plate and production method thereof

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specific Embodiment approach

[0037] As a specific embodiment of the production method of a 380MPa grade automotive wheel steel hot-rolled pickled plate provided by the present invention, the rolling includes: rolling the slab that has been dephosphorized by high-pressure water through a rough rolling mill and a finish rolling mill. system.

[0038]In this embodiment, the slab dephosphorized by high-pressure water is sequentially subjected to rough rolling, hot coil box and finish rolling to obtain a hot-rolled plate.

[0039] As a specific embodiment of the production method of a 380MPa grade automotive wheel steel hot-rolled pickled plate provided by the present invention, the outlet temperature of the rough rolling mill is 1020-1080°C, and the outlet temperature of the finishing mill is 840-890°C.

[0040] As a specific embodiment of the production method of a 380MPa grade automotive wheel steel hot-rolled pickled plate provided by the present invention, the slab is rolled in five passes in the rough ro...

Embodiment 1

[0044] A 380MPa-grade automobile wheel steel hot-rolled pickled plate, in terms of weight percentage, its composition includes: C: 0.04%, Si: 0.04%, Mn: 0.45%, P: 0.020%, S: 0.008%, V: 0.01% , Ti: 0.005%, and the rest are iron and unavoidable impurities; prepare qualified slabs with the above composition and through 150 tons of converter to extract vanadium, 150 tons of converter smelting, LF refining, and slab continuous casting; place the slab Heating in the heating furnace, the heating time is 120 minutes, the heating time is 1180 ° C, and then the slab is taken out of the heating furnace and dephosphorized by high-pressure water. The coil box, after 7 passes of the finishing mill, the outlet temperature is 840°C, after centralized cooling, the coiling temperature is 550°C, and the coiled slab is stacked and cooled in the coil warehouse for 24 hours, and the thickness is 2.0mm. Qualified 380MPa-grade automotive wheel steel hot-rolled pickled plate with a width of 1250mm, a ...

Embodiment 2

[0046] A 380MPa-grade automobile wheel steel hot-rolled pickled plate, in terms of weight percentage, its composition includes: C: 0.05%, Si: 0.04%, Mn: 0.50%, P: 0.018%, S: 0.007%, V: 0.02% , Ti: 0.008%, and the rest are iron and unavoidable impurities; prepare qualified slabs with the above composition and through 150 tons of converter to extract vanadium, 150 tons of converter smelting, LF refining, and slab continuous casting; place the slab Heating in the heating furnace, the heating time is 130 minutes, and the heating time is 1190 ° C. After the slab is taken out of the heating furnace, it is dephosphorized by high-pressure water. The coil box, after 7 passes of the finishing mill, the outlet temperature is 860°C, after centralized cooling, the coiling temperature is 570°C, and the coiled slabs are stacked and cooled in the coil warehouse for 28 hours, and the thickness is 6.0mm. Qualified 380MPa-grade automotive wheel steel hot-rolled pickled plate with a width of 1250...

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Abstract

The invention provides a 380 MPa grade automobile wheel steel hot rolling acid pickling plate and a production method thereof and belongs to the technical field of steel rolling. The 380 MPa grade automobile wheel steel hot rolling acid pickling plate comprises the following components in percentage by weight: 0.04-0.09% of C, equal to or less than 0.04% of Si, 0.45-0.60% of Mn, equal to or less than 0.020% of P, equal to or less than 0.008% of S, 0.005-0.015% of Ti, 0.01-0.03% of V and the balance of Fe and unavoidable impurities. The production method comprises the following steps: preparinga plate slab, putting the plate slab in a heating furnace to be heated, then, adopting high pressure water to remove phosphorus, and then, carrying out rolling, cooling and coiling on the plate slab.According to the 380 MPa grade automobile wheel steel hot rolling acid pickling plate, vanadium and titanium are added in steel to improve the strength, so that the performance demand of automobile wheel steel is met, generation of an oxide scale is reduced, and the surface quality after acid pickling is high.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and more specifically relates to a 380MPa grade automobile wheel steel hot-rolled pickling plate and a production method thereof. Background technique [0002] Wheel steel is the steel used to produce automobile wheels. Wheel steel requires high strength, toughness and plasticity, high fatigue resistance, wear resistance and thermal crack resistance. Automobile steel wheels are formed by steel plates and welded. YB / T 4151-2015 stipulates that CL is added after the tensile strength value to indicate automobile wheel steel. Low-carbon manganese steel is mostly used, and the tensile strength level ranges from 330MPa to 590MPa. [0003] In recent years, the use of wheel steel has been increasing, and the requirements for use have become more and more stringent. The rim is an important part of the steel wheel, and it is mostly welded by flash butt welding or resistance butt welding. Higher re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/12C22C38/14B21B1/22B21B3/02B21B37/00B21B37/74
CPCB21B1/22B21B3/02B21B37/00B21B37/74B21B2201/06C22C38/002C22C38/02C22C38/04C22C38/12C22C38/14
Inventor 梁静召张斯杨永波王倩赵颖郭增盈
Owner HEBEI IRON AND STEEL
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