Thermal treatment process for connector of 42CrMo texture

A connector and material technology, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problems of poor hardenability, shorten the service life of connectors, etc., to improve hardenability, reduce internal stress, improve tensile strength and The effect of stress resistance

Inactive Publication Date: 2019-01-01
温岭市大山热处理厂(普通合伙)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The two carriages of the train are often connected and fixed by the connector. The connector is a buffer part when the train brakes. It will bear a huge impact force when it works. Therefore, the traditional heat treatment method will easily lead to poor hardenability. Then the service life of the connector is greatly reduced, which needs to be improved

Method used

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Embodiment Construction

[0032] A heat treatment process for a connector made of 42CrMo material, comprising the steps of:

[0033] S1: Heating, after heating the furnace continuously to 900-920°C, place the connector in the furnace and keep it warm for 30-40min;

[0034] S2: Carburizing, including the following steps:

[0035] S21: Strong infiltration, keep the temperature constant, continue to feed methanol and propane into the heating furnace, keep warm

[0036] 390-410min, wherein the heating temperature is preferably 910°C, and the holding time is preferably 400min;

[0037] S22: Diffusion, keep the temperature constant, continue to feed methanol and propane into the heating furnace, keep warm

[0038] 190-210min, wherein the heating temperature is preferably 910°C, and the holding time is preferably 200min;

[0039] S23: keep warm, keep cooling down to 830-850°C, keep the temperature constant, keep warm for 25-35min, wherein the heating temperature is preferably 840°C, and the holding time is...

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Abstract

The invention discloses a thermal treatment process for a connector of 42CrMo texture, relating to the field of thermal treatment process. The process mainly comprises a heating phase, a carburizationphase at 900-920 DEG C, a graded oil cooling phase at 100-120 DEG C and a high-temperature tempering phase at 410-430 DEG C, wherein the carburization phase comprises the phases of strong permeability, diffusion and heat preservation. The thermal treatment process has the following advantages and effects: by arranging a long-time strong permeability phase and a high-temperature diffusion phase, the hardenability of the connector is improved, the tensile resistant and anti-pressure ability thereof are improved, and the effect of long service life is achieved. Meanwhile, graded oil cooling is adopted to reduce internal stress inside the connector, and the connector is prevented from deforming and cracking; by additionally arranging a heat preservation phase after the diffusion phase, the decarbonization phenomeon of the connector is prevented from occurrence. The tempered cable troostite tissue is obtained as well through high-temperature tempering, the comprehensive mechanical propertyof the connector is improved, and the service life of the connector is further improved.

Description

technical field [0001] The invention relates to the field of heat treatment technology, in particular to a heat treatment technology for a connector made of 42CrMo material. Background technique [0002] In the field of material processing and equipment processing, heat treatment is a common process for strengthening the surface of materials and equipment to make them have various good characteristics. Wear resistance, fatigue strength and toughness, etc., so as to meet the different requirements of various mechanical parts and tools. [0003] The two carriages of the train are often connected and fixed by the connector. The connector is a buffer part when the train brakes. It will bear a huge impact force when it works. Therefore, the traditional heat treatment method will easily lead to poor hardenability. Then the service life of the connector is greatly reduced, which needs to be improved. Contents of the invention [0004] The purpose of the present invention is to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/22C21D1/18C21D9/00C21D6/00
CPCC21D1/18C21D6/002C21D9/0068C21D2211/003C21D2211/005C23C8/22
Inventor 叶振羽
Owner 温岭市大山热处理厂(普通合伙)
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