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High-strength seamless steel tube for integrated drawing automobile axle housing and production process thereof

A technology of seamless steel pipe and production process, applied in temperature control, metal rolling and other directions, can solve the problems of inability to obtain low temperature impact, ductility and strength, reduce the online normalizing process or heat treatment process links, improve strength, The effect of improving the overall performance of the product

Active Publication Date: 2021-04-16
HEILONGJIANG JIANLONG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above key processes cannot obtain steel pipes with superior properties such as low temperature impact, ductility and strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A high-strength seamless steel pipe for one-piece drawn automobile axle housing, the composition and weight percentage of the steel pipe are 0.13% for C, 0.2% for Si, 1.35% for Mn, 0.027% for V, and 0.02% for Al, P is 0.006%, S is 0.004%, Fe and unavoidable impurities are 98.263%.

Embodiment 2

[0016] A high-strength seamless steel pipe for one-piece drawn automobile axle housing, the composition and weight percentage of the steel pipe: C is 0.145%, Si is 0.275%, Mn is 1.425%, V is 0.0335%, and Al is 0.03% , P is 0.013%, S is 0.07%, Fe and unavoidable impurities are 98.0085%.

Embodiment 3

[0018] A high-strength seamless steel pipe for one-piece drawn automobile axle housing The composition and weight percentage of the steel pipe: 0.16% for C, 0.35% for Si, 1.5% for Mn, 0.04% for V, and 0.04% for Al, P is 0.020%, S is 0.01%, Fe and unavoidable impurities are 97.754%.

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Abstract

The invention belongs to the technical field of steel production, and particularly relates to a high-strength seamless steel tube for an integrated drawing automobile axle housing. The high-strength seamless steel tube comprises the following components in percentage by weight: 0.145% of C, 0.275% of Si, 1.425% of Mn, 0.0335% of V, 0.03% of AL, 0.013% of P, 0.07% of S, and 98.0085% of Fe and impurities. The process comprises the following steps of: smelting, deoxidizing, alloying, refining and continuous casting in a converter or an electric furnace, protecting casting, tube blank sawing, heating, adding of a re-line temperature monitor in perforating, adding of a re-line temperature monitor in a rolled tube, online micro-control cooling, adding of temperature measurement in the process, micro-tension reducing and intermediate cooling bed, adding of a re-line temperature monitor in the process, cooling bed air cooling, straightening and saw cutting, and sampling inspection, flaw detection, surface inspection, mark spraying warehousing. On the premise that the axle machining quality is met, online normalizing process or heat treatment process links are reduced, and the comprehensive performance of the product is improved.

Description

Technical field: [0001] The invention belongs to the technical field of iron and steel production, and in particular relates to an integrated high-strength seamless steel pipe for drawing automobile axle housings and a production process thereof. Background technique: [0002] With the vigorous development of the automobile industry supported by the national industry in recent years, the axle assembly has formed a complete industrial chain as the main part of the automobile, and the axle housing mainly undertakes the functions of driving, carrying and braking. The axle housing is both a load-bearing part and a force-transmitting part, and at the same time it is also the shell of the final reducer, differential and drive wheel transmission. According to the manufacturing process, automobile axle housings are divided into three types: casting integral type (heavy-duty off-road, construction machinery), steel plate stamping and welding type and steel pipe expansion forming draw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/12B21B1/46B21B37/74
Inventor 于勇赵雪松胥传海李宏波
Owner HEILONGJIANG JIANLONG IRON & STEEL
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