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Heat treatment technique of low-alloy steel

A technology of low-alloy steel and heat treatment method, which is applied in the field of heat treatment of low-alloy steel, can solve the problems of insufficient hardness of low-carbon alloy steel material, easy wear of bucket teeth, and failure to meet the needs of bucket teeth, etc., to achieve high hardness, The effect of improving quality

Inactive Publication Date: 2015-10-07
柳州市建西机械厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during use, the bucket teeth need to be constantly contacted and rubbed by hard things such as stones and mud, so the bucket teeth are easily worn out after a period of use.
[0003] The current bucket teeth are made of low-carbon alloy steel, but the hardness of low-carbon alloy steel is not enough to meet the needs of bucket teeth

Method used

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Embodiment Construction

[0010] The present invention discloses a heat treatment process for low alloy steel. The low alloy steel includes the following components by weight percentage: C: 0.9 to 1.00%; Mn: 1.5 to 1.7%; Cr: 1.40 to 1.90%: Mo: 0.2 to 0.3%; Si: 0.25 ~ 0.33%, both S and P <0.020%, the rest is Fe and unavoidable impurities;

[0011] The heat treatment method adopted for the low alloy steel is as follows: heat to 1050~1070℃ for 15~25min, so that the material is completely transformed into austenite, and the carbides are dissolved in the austenite; then the temperature is isothermally treated at 400~480℃2 ~4.5h, carbides are uniformly precipitated, austenite is transformed into lower bainite, then low temperature tempering at 160~180℃, holding for 0.8~1.5h, air cooling.

[0012] As an embodiment of the present invention, in the heat treatment method of low alloy steel, heating to 1060° C. and holding for 20 min.

[0013] As an embodiment of the present invention, in the heat treatment method of l...

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Abstract

The invention provides a heat treatment technique of low-alloy steel. The manufactured low-alloy steel has the advantages of higher hardness, higher toughness and higher wear resistance, and can obviously enhance the quality of cutting teeth when being used for manufacturing cutting teeth.

Description

Technical field [0001] The invention relates to a heat treatment method, in particular to a heat treatment process of low alloy steel. Background technique [0002] The bucket teeth are generally fixed on the lower end of the excavator bucket, and directly contact the road surface and the material that needs to be shoveled, such as sand, stone, mud and other hard things, so as to protect the bucket from damage. However, since the bucket teeth need to be constantly contacted and rubbed with hard objects such as stones and soil during use, the bucket teeth are easily worn out after a period of use. [0003] Current bucket teeth use low-carbon alloy steel materials, but the hardness of low-carbon alloy steel materials is not enough to meet the needs of bucket teeth. Summary of the invention [0004] In order to solve the problems in the prior art, the present invention provides a heat treatment process for low alloy steel. [0005] The present invention provides a heat treatment proces...

Claims

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Application Information

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IPC IPC(8): C21D6/00C21D1/20C22C38/38
Inventor 赖日海
Owner 柳州市建西机械厂