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Heat treatment process for 65Mn spring washer

A spring washer and process technology, used in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve problems such as decarburization, and achieve the effect of preventing oxidation and decarburization and ensuring performance.

Active Publication Date: 2013-07-10
HANGZHOU BRANCH ZHEJIANG GEELY AUTOMOBILE RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a heat treatment process for a 65Mn spring washer that improves the quality stability of the 65Mn spring washer in order to solve the defect that a certain degree of decarburization will occur on the surface of the existing spring washer produced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A heat treatment process for a 65Mn spring washer. The heat treatment process includes blanking, electric spark drilling, wire cutting, fitter correction, heat treatment, performance testing and surface treatment. The heat treatment includes quenching and tempering. During the quenching of heat treatment, the 65Mn spring washer is preheated first, and the preheating refers to putting the 65Mn spring washer into the preheated quenching tool; firstly, the temperature of the quenching furnace is raised to 820°C, Then add charcoal into the quenching furnace, the charcoal is pulverized before being added into the quenching furnace, the particle size range is 200 mesh, the amount of charcoal added is 8kg, and the temperature is kept at a constant temperature for 10 minutes; Put the 65Mn spring washer into the quenching tool, and quench it immediately after keeping it warm for 10 minutes, and the quenching and holding time is 5 minutes; before putting the 65Mn spring washer int...

Embodiment 2

[0022] A heat treatment process for a 65Mn spring washer. The heat treatment process includes blanking, electric spark drilling, wire cutting, fitter correction, heat treatment, performance testing and surface treatment. The heat treatment includes quenching and tempering. During quenching of heat treatment, the 65Mn spring washer should be preheated first. The preheating refers to putting the 65Mn spring washer into the preheated quenching tool; Charcoal, charcoal is crushed before adding to the quenching furnace, the particle size range is 250 mesh, the amount of charcoal added is 10kg, and the temperature is kept at a constant temperature for 12 minutes. In the quenching tool, quench immediately after keeping warm for 12 minutes, and the quenching and holding time is 8 minutes; before the 65Mn spring washer is put into the quenching tool, paint the anti-oxidation and decarburization paint on the surface of the 65Mn spring washer; after quenching, the 65Mn spring washer is A...

Embodiment 3

[0025] A heat treatment process for a 65Mn spring washer. The heat treatment process includes blanking, electric spark drilling, wire cutting, fitter correction, heat treatment, performance testing and surface treatment. The heat treatment includes quenching and tempering. During quenching of heat treatment, the 65Mn spring washer should be preheated first. The preheating refers to putting the 65Mn spring washer into the preheated quenching tool; Charcoal, charcoal is crushed before adding to the quenching furnace, the particle size range is 300 mesh, the amount of charcoal added is 12kg, and the temperature is kept at a constant temperature for 15 minutes. In the quenching tool, quench immediately after holding for 15 minutes, and the quenching and holding time is 10 minutes; before the 65Mn spring washer is put into the quenching tool, apply anti-oxidation and decarburization paint on the surface of the 65Mn spring washer. After quenching, oil-cool the 65Mn spring washer unt...

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Abstract

The invention relates to a heat treatment process for a 65Mn spring washer. The heat treatment process comprises the following steps: blanking; electric spark perforation of basic bores; linear cutting and forming; correction by a fitter; heat treatment; performance test; and surface treatment; wherein during quenching in the step of heat treatment, firstly, the 65Mn spring washer is subjected to preheating which means the 65Mn spring washer is put into a quenching tool heated in advance, then a quenching furnace is heated, charcoal is added into the quenching furnace, the quenching tool is placed into the quenching furnace with a temperature maintained to be constant, then the quenching tool is taken out, the 65Mn spring washer is put into the quenching tool, quenching is carried out immediately after thermal insulation, and the surface of the 65Mn spring washer is coated with an anti-oxidation decarburization paint before the 65Mn spring washer is placed into the quenching tool. According to the invention, the charcoal is added into the quenching furnace for generation of protective gas, the anti-oxidation decarburization paint is coated on the surface of the spring washer for prevention of oxidation and decarburization, so desired performances of the spring washer are guaranteed.

Description

technical field [0001] The invention relates to a heat treatment process of 65Mn spring steel, in particular to a heat treatment process of a 65Mn spring washer which improves the quality stability of the 65Mn spring washer. [0002] Background technique [0003] Spring is an important general-purpose basic part with a wide range of applications. There are many factors that affect the quality of the spring, and heat treatment has an important impact on the various properties and service life of the spring. Spring washers are often made of 65Mn spring steel strips, which are required to have high elastic limit, yield strength and fatigue strength. Therefore, they have high requirements for heat treatment technology and must ensure certain shape accuracy and elastic performance requirements. In production, it often happens that the hardness value of the test block is qualified, but the elasticity index of the spring washer is not stable enough. Therefore, heat treatment engi...

Claims

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Application Information

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IPC IPC(8): C21D9/40C21D1/18
Inventor 郭秋彦张应飞李莉刘强杨安志赵福全
Owner HANGZHOU BRANCH ZHEJIANG GEELY AUTOMOBILE RES INST
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