Heat treatment distortion control method for leaf spring parts

A technology of heat treatment deformation and control method, which is applied in the field of heat treatment of spring leaf parts and heat treatment deformation control of spring leaf parts. The effect is obvious, the rebound effect is small

Inactive Publication Date: 2017-08-18
BEIJING HANGXING MACHINERY MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The spring piece is a wide and thin weakly rigid part, and it is easy to be twisted and deformed after quenching. Because of its high elasticity after tempering, it is not easy to use cold correction method, and the correction effect is poor.

Method used

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  • Heat treatment distortion control method for leaf spring parts
  • Heat treatment distortion control method for leaf spring parts

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as figure 1 , 2 As shown in the figure, between the pressure plate and the base in the shape-correcting fixture, the bolts that apply pre-tightening force to the parts are arranged symmetrically.

[0022] The first step, quenching treatment: place the cold-formed 65Mn reed in a carbon box to reduce the high-temperature oxidation of the parts, put them into the furnace together and heat them at 800-820°C for quenching treatment;

[0023] The second step is pre-calibration: place the quenched spring in the shape-calibration fixture. Because the deformation of the reed is different and the hardness is high, you can moderately pre-tighten the bolts that fix the pressure plate and the base first, so that most of the reed will stick to the shape. Put it into the furnace and heat it at the specified tempering temperature, wherein the tempering temperature is 350 ° C ~ 400 ° C;

[0024] The third step is to finalize the shape: the total tempering time is h. When the temp...

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PUM

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Abstract

The invention discloses a heat treatment deformation control method for spring sheet parts, which belongs to the field of heat treatment deformation control. The method is as follows: ①Quenching the parts after cold forming; ②Put the spring piece into the shape-correcting fixture, fix it with appropriate pre-tightening bolts, and temper them together at the specified temperature; ③Tighten the bolts fully after half the tempering time, Put it into the furnace again and heat until the tempering process is over. The invention has the advantages that the method of fixture shape maintenance and heat correction can effectively correct the distortion and deformation of the spring sheet after quenching, ensure the corresponding structure and hardness requirements, and achieve the purpose of heat treatment shape control.

Description

technical field [0001] The invention relates to a heat treatment method for leaf spring parts, in particular to a heat treatment deformation control method for leaf spring parts. It is suitable for correcting the distortion and deformation of reed parts, and relates to the field of heat treatment deformation control. Background technique [0002] The spring sheet is usually made of 65Mn steel strip, which is generally made by annealing, cold forming, quenching + medium temperature tempering, and is widely used in electronic information, machinery manufacturing, aerospace and other fields. The spring leaf is a wide and thin weakly rigid part, and it is easy to be twisted and deformed after quenching. Because of its high elasticity after tempering, it is not easy to use the cold correction method, and the shape correction effect is poor. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the present invention discloses a heat treatment deformati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/02C21D1/18C21D11/00
CPCC21D9/02C21D1/18C21D11/00
Inventor 陈磊贺晓军
Owner BEIJING HANGXING MACHINERY MFG CO LTD
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