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High-strength pinion steel for vehicles

A gear steel, high-strength technology, applied in the field of gear steel, can solve the problems of stable and high-efficiency automobile performance, insufficient hardenability zone control, and rich and scarce metal resources, etc., to achieve performance reduction, small deformation, and comprehensive improvement The effect of mechanical properties

Inactive Publication Date: 2009-04-01
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing domestic gear steels have problems of insufficient hardenability or narrow hardenability zone control, which cannot meet the requirements of stable

Method used

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Abstract

The invention discloses a pinion steel of high-strength automobile, which comprises the following parts: 0.20-0.40% C, 0.20-0.50% Si, 0.50-1.00% Mn, 0.80-1.30% Cr, 0.015-0.080% Nb, 0.030-0.090% V, 0.15-0.55% Mo, 0.015-0.050% Al. The invention minimizes the heat processing deformation quantity with high matching rate, which lengthens the life with low cost.

Description

technical field [0001] The invention relates to a gear steel, especially a high-strength gear steel for automobiles. Background technique [0002] Recently, with the development of the automobile industry such as automobile lightweight, environmental protection and fuel saving, increasing the design stress of gears, that is, requiring high-strength steels, has become the main direction for the development of automobile gear steels at home and abroad. However, the existing imported new grades In the use of gear steel, there are often problems such as insufficient hardenability of the core and wide control of the hardenability zone at the end. Therefore, improving the stability of gear steel performance has become a top priority. [0003] So far, 22CrMoH steel (equivalent to SCM822H in Japan) has been widely used in automobile rear axle gears. The end quenching hardness range of these gear steels is 33-41HRC, the hardenability bandwidth is ≦8HRC, and the grain size requiremen...

Claims

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Application Information

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IPC IPC(8): C22C38/26
Inventor 徐文亮张忠铧张弛
Owner BAOSHAN IRON & STEEL CO LTD