Deep cooling treatment method of high speed steel tool

A cryogenic treatment, high-speed steel technology, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problems of insignificant effect and high energy consumption, and achieve the effects of uniform distribution, energy saving, and increase in the number of dimples
CN1718774AInactive Publication Date: 2006-01-11大连理工模具研究所有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
大连理工模具研究所有限公司
Publication Date
2006-01-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

A deep cooling method for treating the cutting tool made of high-speed steel in order to elongate its service life includes such steps as quenching, tempering, precooling, deep cooling in liquefied N2 at -185--196 deg.C , holding the temp for a certain time calculated by an equation, recovering its temp to room temp and heating it in boiling water for 60 min. For the large cutting tool, said steps can be performed 2-3 times.
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Description

technical field

[0001] The invention belongs to the technical field of heat treatment technology for metal materials, and relates to the heat treatment of steel workpieces, in particular to a cryogenic treatment method for high-speed steel cutting tools. Background technique

[0002] In the prior art, the cryogenic treatment process with better effect for high-speed steel cutting tools is: quenching + tempering once + deep cooling + tempering once, and the holding time of cryogenic treatment is the effective thickness or effective diameter of the workpiece multiplied by 5 ~8 minutes / mm, the direct immersion method of the liquid method is mostly used in cryogenic treatment.

[0003] The problem existing in the current cryogenic treatment process of high-speed steel cutting tools is that there are many times of tempering and high energy consumption. The calculation of the cryogenic holding time in the cryogenic treatment process does not consider the incubation period of the ...

Claims

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