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Non-quenched and tempered steel and method for manufacturing automobile semi-axle using non-quenched and tempered steel

A technology of non-quenched and tempered steel and automobile half shafts, which is applied in the field of automobile metal material processing to achieve the effects of simplifying the straightening process, reducing costs, and reducing deformation and cracking

Inactive Publication Date: 2019-04-02
SHAANXI AUTOMOBILE GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the main purpose of the present invention is to provide a non-quenched and tempered steel and a method for manufacturing automobile half shafts using non-quenched and tempered steel, in order to overcome the problems of high-performance non-quenched and tempered steel development and expansion of industrial applications in the prior art

Method used

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  • Non-quenched and tempered steel and method for manufacturing automobile semi-axle using non-quenched and tempered steel
  • Non-quenched and tempered steel and method for manufacturing automobile semi-axle using non-quenched and tempered steel
  • Non-quenched and tempered steel and method for manufacturing automobile semi-axle using non-quenched and tempered steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1. Smelting and manufacturing of a non-quenched and tempered steel 45MnSiVSQ;

[0052] Non-quenched and tempered steel 45MnSiVSQ is prepared by electric furnace or converter steelmaking → ladle refining LF → ladle vacuum degassing VD → continuous casting → controlled rolling and controlled cooling Round steel, its chemical composition is (wt / %): C:0.45; Si:0.74; Mn:1.45; P:0.008; S:0.021; Cr:0.27; V:0.13; Al:0.014; N:0.017; :0.005; Ti:0.018, Ni≤0.25; Mo≤0.10; Sn≤0.03; Cu≤0.20, the rest are Fe and other impurities.

[0053] The contents of the above Ni, Mo, Sn, and Cu are all greater than zero.

[0054] 2. Controlled forging and controlled cold forging:

[0055] The non-quenched and tempered steel 45MnSiVSQ round steel produced in the step 1 is sawn and blanked → induction heating → upsetting → pendulum milling flange → controlled cooling → stack cooling → shot blasting, wherein in the forging controlled forging and controlled cooling process, The workpiece is cooled ...

Embodiment 2

[0065] Different from Example 1, the chemical composition of non-quenched and tempered steel 45MnSiVSQ is (wt / %): C:0.46; Si:0.56; Mn:1.26; P:0.010; S:0.004; Cr:0.26; V:0.12 ; Al: 0.02; N: 0.0144; Nb: 0.018; Ti: 0.02, Ni≤0.25; Mo≤0.10; Sn≤0.03; Cu≤0.20, the rest is Fe and unavoidable impurities.

[0066] The contents of the above Ni, Mo, Sn, and Cu are all greater than zero.

Embodiment 3

[0068] The difference from Example 1 is that the chemical composition of non-quenched and tempered steel 45MnSiVSQ is (wt / %), C:0.45; Si:0.58; Mn:1.35; P:0.011; S:0.004; Cr:0.22; V:0.12 ; Al: 0.021; N: 0.0157; Nb: 0.025; Ti: 0.020, Ni≤0.25; Mo≤0.10; Sn≤0.03; Cu≤0.20, the rest is Fe and unavoidable impurities.

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Abstract

The invention discloses non-quenched and tempered steel and a method for manufacturing an automobile semi-axle by using the non-quenched and tempered steel. The non-quenched and tempered steel is prepared from the components in percentage by mass: 0.43-0.47% of C, 0.50-0.80% of Si, 1.20-1.60% of Mn, less than or equal to 0.015% of P, less than or equal to 0.035% of S, 0.15-0.30% of Cr, 0.10-0.15%of V, 0.01-0.05% of Al, less than or equal to 0.045% of Nb, 0.015-0.035% of Ti, 0.01-0.02% of N, less than or equal to 0.25% of Ni, less than or equal to 0.10% of Mo, less than or equal to 0.03% of Sn, less than or equal to 0.20% of Cu and the balance of Fe and impurities. According to the non-quenched and tempered steel and the method for manufacturing the automobile semi-axle by using the non-quenched and tempered steel, the high-performance micro-alloyed non-quenched and tempered steel is adopted to replace 42CrMoH quenched and tempered steel for the implementation of a semi-axle controlled-forging and controlled cooling manufacturing process, and the quenching and tempering heat treatment process is eliminated, so that energy consumption of the automobile semi-axle manufacturing can besaved by 40-50%, the cost can be reduced by 10-20%, meanwhile, deformation and cracking caused by quenching during quenching and tempering can be reduced, the straightening process is simplified, andthe technical level reaches the domestic leading position.

Description

technical field [0001] The invention relates to the technical field of processing and application of automotive metal materials, in particular to a non-quenched and tempered steel 45MnSiVSQ (SQ is the code of the new type of non-quenched and tempered steel, which is derived from the abbreviation of Shaanxi Automobile) and a method for manufacturing automobile axle shafts using it. Background technique [0002] Non-quenched and tempered steel is a kind of high-quality or special quality structural steel that reaches or approaches the mechanical properties of quenched and tempered steel through microalloying, controlled rolling (forging) and controlled cooling, etc., without quenching and tempering heat treatment. The abbreviation of medium-carbon micro-alloy structural steel, also known as micro-alloyed steel, was developed in the 1970s due to the promotion of the oil crisis, mainly to simplify the process and cancel quenching and tempering heat treatment, reduce energy consum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/58C22C38/06C22C38/46C22C38/48C22C38/50C22C38/44C22C38/42
CPCC22C38/001C22C38/008C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C38/58
Inventor 严超峰包耀宗董立社王欢锐李栋谢余
Owner SHAANXI AUTOMOBILE GROUP
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