Heat treatment process for 20CrMnTi gear steel

Abstract

The invention discloses a heat treatment process for 20CrMnTi gear steel. The heat treatment process for the 20CrMnTi gear steel is characterized in that the process includes the following steps that (1) blanking is performed, (2) forging is conducted, (3) normalizing is carried out, specifically, the heating temperature is 920 to 950 DEG C, heat preservation is performed for two to three hours, and then air cooling is performed; (4) machining is conducted; (5) cleaning is carried out; (6) carburizing is performed, specifically, gas carburizing is performed, the heating temperature is 900 to 920 DEG C, the heat preservation time is calculated according to 0.15 to 0.2 mm / h, and the heating temperature does not exceed 920 DEG C; (7) quenching is conducted, specifically, the heating temperature is 860 to 900 DEG C, heat preservation, oil cooling and vertical quenching into oil are performed in sequence, a large part is quenched into oil firstly, up-and-down movement is conducted after quenching into oil, and proper horizontal movement cooperates so as to improve the cooling speed of a workpiece; (8) tempering is performed, specifically, the heating temperature is 500-650 DEG C, heat preservation is performed for two hours, and then oil cooling is conducted; and (9) cleaning is carried out. The gear steel fabricated through the process is high in strength, good in tenacity and high in fatigue resistance.

Description

technical field [0001] The invention relates to a heat treatment process of 20CrMnTi gear steel. Background technique [0002] At present, the heat treatment process used for steel parts is relatively complicated, and there is no uniform specification and standard, resulting in uneven quality of the produced steel parts, and many repeated processes also make the production efficiency low, increase the labor burden of workers, and make the products market competitiveness is not high. For some operators who have just entered the industry, there is no clear method and process, resulting in frequent mistakes and omissions during operation, and may even cause serious consequences. Contents of the invention [0003] In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a heat treatment process for 20CrMnTi gear steel. The gear steel produced by this process has high strength, good toughness and strong ...

AI Technical Summary

Problems solved by technology

[0002] At present, the heat treatment process used for steel parts is relatively complicated, and there is no uniform specification and standard, resulting in uneven quality of the produced steel parts, and many repeated processes also make the production efficiency low, increase the labor burden of workers, and make the products The market competitiveness is not high

For some operators who have just entered the industry, there is no clear method and process, resulting in frequent mistakes and omissions during operation, and may even cause serious consequences