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Heat treatment process for 65Mn steel

A process, box-type resistance furnace technology, applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problems of wear-resistant parts failure, etc., and achieve the effect of prolonging the life of parts and improving wear resistance.

Inactive Publication Date: 2016-07-06
CHONGQING LINGYUN TOOLS CO LTD
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Problems solved by technology

The existing heat treatment process is: quenching 830°C ± 20°C, oil cooling, tempering 540°C ± 50°C, the existing heat treatment can improve the hardness of 65Mn steel, but its wear resistance needs to be further improved, and wear resistance is often is an important reason for the failure of its parts

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Embodiment Construction

[0007] The present invention will be further described below in conjunction with embodiment:

[0008] A heat treatment process for 65Mn steel, characterized in that the heat treatment process includes the following steps: cleaning and degreasing in an ultrasonic cleaner → drying at a temperature of 80°C → preheating at a constant temperature of 350°C in a SX2-4-10 box-type resistance furnace 10min→Nitriding in a nitriding salt bath at 560°C in the SXQF-1200 nitrogen-protected box-type resistance furnace for 3h→Oxidation in an oxide salt bath at 370°C in a SX2-4-10 box-type resistance furnace for 20min→cold water Wash to remove salt → wash with hot water at 70°C → dry → immerse in oil.

[0009] A kind of heat treatment process of 65Mn steel of the present invention, influences the tissue composition and the phase structure of composite permeation layer by strictly controlling process parameters such as nitriding temperature, nitriding time, oxidation temperature and oxidation t...

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Abstract

The invention discloses a heat treatment process for 65Mn steel. The heat treatment process is characterized by including the following steps of cleaning and degreasing in an ultrasonic cleaning machine, drying at the temperature of 60-80 DEG C, preheating in an SX2-4-10 type chamber electric furnace for 5-10 min at the constant temperature of 350 DEG C, nitriding in a nitriding salt bath of 550-570 DEG C in an SXQF-1200 type nitrogen-protecting chamber electric furnace for 2.5-3 h, oxidation in an oxidation salt bath of 350-370 DEG C in the SX2-4-10 type chamber electric furnace for 15-20 min, cleaning in cold water for desalting, cleaning in hot water of 65-70 DEG C, drying and oil immersion. According to the heat treatment process for the 65Mn steel, the structural constituents and the phase structure of a composite permeation layer are affected by strictly controlling process parameters such as the nitriding temperature, nitriding time, the oxidation temperature and oxidation time, and therefore abrasion resistance of the steel is improved, and the service life of a part is prolonged.

Description

technical field [0001] The invention belongs to the field of heat treatment technology, in particular to a heat treatment technology for 65Mn steel. Background technique [0002] 65Mn steel is a commonly used spring steel. Its composition is simple, its hardenability, comprehensive mechanical properties and decarburization resistance are better than carbon steel, its price is lower, and its consumption is large. It is used to manufacture various valve springs, Spring rings, shock absorbers, clutch reeds and brake springs, etc. The existing heat treatment process is: quenching 830°C ± 20°C, oil cooling, tempering 540°C ± 50°C, the existing heat treatment can improve the hardness of 65Mn steel, but its wear resistance needs to be further improved, and wear resistance often It is an important reason leading to the failure of its parts. Contents of the invention [0003] The purpose of the present invention is to address the deficiencies in the above-mentioned technologies. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/58
Inventor 喻富春
Owner CHONGQING LINGYUN TOOLS CO LTD
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