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Cold-pressed steel plate for automotive axle housing and production method thereof

A production method and axle housing technology, applied in the field of iron and steel smelting technology, can solve problems affecting vehicle safety, high scrap rate, inconsistent product quality, etc., and achieve the effect of improving cold forming performance and strength

Inactive Publication Date: 2016-11-23
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above-mentioned patent discloses 600MPa-grade steel for automobile axle housings, the process is outdated, the scrap rate is high, and the steel formula is not suitable for the direct stamping and forming process of cold steel plates. The product quality is not uniform during mass production, and the overall quality of the product declines, which directly affects the vehicle. Safety

Method used

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  • Cold-pressed steel plate for automotive axle housing and production method thereof
  • Cold-pressed steel plate for automotive axle housing and production method thereof
  • Cold-pressed steel plate for automotive axle housing and production method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] C: 0.15%, Si: 0.4%, Mn: 1.5%, P≤0.015%, S≤0.005%, V: 0.05%, Nb: 0.02%, Als: 0.04%, the balance is Fe and a small amount of impurities.

Embodiment 2

[0045] C: 0.16%, Si: 0.45%, Mn: 1.60%, P≤0.015%, S≤0.005%, V: 0.060%, Nb: 0.030%, Als: 0.050%, the balance is Fe and a small amount of impurities.

Embodiment 3

[0047] C: 0.10%, Si: 0.30%, Mn: 1.45%, P≤0.015%, S≤0.005%, V: 0.045%, Nb: 0.015%, Als: 0.025%, the balance is Fe and a small amount of impurities.

[0048] Embodiments 1 to 3 are all produced by the above method. Embodiment 1 to 3 steel detection data are as follows:

[0049]

[0050]Through the above form and figure 1 , 2 The above-mentioned steel materials shown above all meet the 600MPa steel standard for automobile axle housings, and the tensile, impact and other mechanical properties of steel plates, ultrasonic flaw detection and other indicators are superior to similar products, and meet the production requirements of automobile axle housing manufacturers.

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Abstract

The invention relates to a steel and iron smelting technology, in particular to a cold-pressed steel plate for an automotive axle housing and a production method of the cold-pressed steel plate. The cold-pressed steel plate for the automotive axle housing comprises, by mass percentage, 0.10%-0.16% of C, 0.30%-0.45% of Si, 1.45%-1.60% of Mn, smaller than or equal to 0.15% of P, smaller than or equal to 0.005% of S, 0.045%-0.060% of V, 0.015%-0.030% of Nb, 0.025%-0.050% of Als and the balance Fe. According to the cold-pressed steel plate for the automotive axle housing and the production method, a trace of V elements and a trace of Nb elements are added to ordinary carbon structural steel, and the content of P elements and the content of S elements are reduced, so that the rolling and cooling technology is appropriately changed to improve the strength of the steel plate, and the cold forming performance of the steel plate is improved. By means of the element design and the design of the production technology process, various performance indexes of the steel plate are guaranteed, and the indexes, such as mechanical properties including the stretching property and the impact property, and the ultrasonic flaw detection index, of the steel plate are better than those of similar products.

Description

technical field [0001] The invention relates to a steel smelting process, in particular to a cold-pressed steel plate for an automobile axle housing and a production method thereof. Background technique [0002] At present, the manufacturing of rear axle housings of automobiles mainly adopts hot stamping after heating and direct stamping of cold steel plates. The hot stamping process after heating is relatively complicated and the cost increases, while the direct stamping of cold steel plates is easy to control and save cost. In addition, the use of high-strength grade steel plates instead of low-strength grade steel plates as shell materials can also reduce the weight of automobiles, which is the development trend of the automobile industry. [0003] The relevant technical content has been disclosed in the prior art, such as the Chinese invention patent with the patent publication number CN 104630629 A, which discloses a kind of automobile axle housing steel and its prepar...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/12C21D8/02
CPCC22C38/02C21D8/0226C21D8/0236C21D2211/005C21D2211/009C22C38/04C22C38/06C22C38/12
Inventor 刘国良郭营利姜军梁立辉董建军
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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