Quenching process for 5CrNiMo steel hammer forging die

A forging die and process technology, applied in the field of quenching process of 5CrNiMo steel hammer forging die, can solve the problems of low die life, thermal fatigue cracks, wear, etc., and achieve the effects of improving performance in all aspects, improving life, and simple quenching process method.

Inactive Publication Date: 2017-05-31
巴南区伟鹏机械加工厂
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0002] The original process of the steel hammer forging die is to quench the oil at 850 degrees, and then cool it to about 200 degrees and let it cool in the air. Relatively low, after a long time of use, it is prone to fracture, thermal fatigue cracks, wear and other forms of failure, which greatly increases the production cost

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] A 5CrNiMo steel hammer forging die quenching process, including the following steps: (1) Preheating at 500°C, heating quenching oil at 840°C, then isothermal at 245°C, and finally tempering at 480°C;

[0010] (2) Make a special induction coil to meet the requirements of the contour size of the mold cavity. First, preheat the mold as a whole to 500-520°C, and keep it for a period of time to make it even temperature. Adjust the electrical parameters of high-frequency induction heating and quenching. The part is induction heated and quenched, and after quenching, it is tempered at 180°C.

[0011] The quenching process of the invention is simple, can improve the performance of various aspects of the mold, so that the life of the mold is significantly improved, and the overall preheating method is adopted to effectively reduce the adverse effects of the hardness zone caused by induction quenching.

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PUM

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Abstract

The invention relates to a quenching process for a 5CrNiMo steel hammer forging die. The quenching process comprises the following steps that (1) preheating is conducted at 500 DEG C, quenching oil is heated at 830-850 DEG C, then, the temperature is kept at 240-250 DEG C, and finally, tempering is carried out at 480-500 DEG C; and (2) a special induction coil is manufactured to meet the overall dimension requirement of a die cavity, the die is entirely preheated to 500-520 DEG C at first, and the temperature is maintained for a period of time, so that the temperature of the whole die is uniform, high-frequency induction quenching electrical parameters are adjusted, induction quenching is conducted on related parts, and after quenching, tempering is carried out at 180 DEG C. According to the quenching process, the method is simple, all properties of the die can be improved, and thus, the life of the die is obviously prolonged.

Description

technical field [0001] The invention belongs to the field of heat treatment, in particular to a 5CrNiMo steel hammer forging die quenching process. Background technique [0002] The original process of the steel hammer forging die is to quench the oil at 850 degrees, and then cool it to about 200 degrees and let it cool in the air. Relatively low, after a long time of use, it is prone to fracture, thermal fatigue cracks, wear and other forms of failure, which greatly increases the production cost. Contents of the invention [0003] The purpose of the present invention is to provide a 5CrNiMo steel hammer forging die quenching process, the quenching process method is simple, can improve all aspects of the performance of the die, so that the life of the die is significantly improved. [0004] In order to achieve the above object, the technical scheme of the present invention is as follows: 1. A 5CrNiMo steel hammer forging die quenching process, which is characterized in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18C21D6/00C21D1/42
CPCY02P10/25
Inventor 余一祥
Owner 巴南区伟鹏机械加工厂
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