High-speed steel heat treatment process applied in manufacturing field of moulds

Abstract

The invention discloses a high-speed heat treatment process applied in manufacturing field of moulds. One time of quenching at 1250 DEG C-1280 DEG C and three or four times of tempering heat treatment at 550 DEG C-570 DEG C in the prior art is changed into a process comprising one time of quenching at 1180 DEG C-1230 DEG C and two times of tempering heat treatment at 300 DEG C-400 DEG C, so that the process can ensure that high-speed steel obtains higher hardness and lower surface roughness; the heat treatment time of the process in the invention is 60% of the original heat treatment time, the quenching and tempering temperatures are reduced, the energy consumption is reduced, and a better economic processing precision is achieved. Besides, the high-speed steel treated in the process can be applied to mould products, and the service life and the strength of the high-speed steel are both obviously longer and higher than those of prior engineering steel profiles.

Description

technical field [0001] The invention relates to the field of high-speed steel processing technology, in particular to a high-speed steel heat treatment technology applied in the field of mold manufacturing. Background technique [0002] 1. Application of high speed steel [0003] The high-speed steel structure contains a large number of high-hardness carbides, which have the advantages of high strength, high hardness and high wear resistance, excellent wear resistance and high surface precision. [0004] 2. A commonly used theoretical process scheme for high-speed steel [0005] Theoretically, high-speed steel usually adopts the following process route: [0006] Forging→pretreatment→rough machining→semi-finishing→heat treatment (quenching 1250℃~1280℃+tempering 550℃~570℃, three to four times)→finishing→finished product [0007] The heat treatment of high-speed steel generally requires one quenching and three to four temperings. The quenching temperature is 1250°C to 1280°C...

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to propose a high-speed steel heat treatment process applied to the field of molds in view of the problems of high energy consumption, long time consumption and low production efficiency of the existing high-speed steel heat treatment process, which restrict the application field of high-speed steel Compared with the existing heat treatment process, this heat treatment process can make the high-speed steel have higher hardness, lower surface roughness, greatly reduce heat treatment time, and greatly reduce energy consumption

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