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Micro-deformation controlling heat treatment process for forming position of special-shaped curved surface part

A technology for micro-deformation and parts, applied in the field of heat treatment, can solve the problems of difficult processing and difficult micro-deformation, and achieve the effects of easy tempering, simplified processing technology, and improved processing efficiency.

Inactive Publication Date: 2017-12-08
CHENGDU LIANYU PRECISION MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a heat treatment process for controlling the micro-deformation of the forming position of curved surface special-shaped parts, which can solve the problem of difficult control of the micro-deformation of the forming position of high-hardness and difficult-to-process special-shaped curved surface parts, and simplify the special-shaped curved surface Parts processing technology, improve its processing efficiency

Method used

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  • Micro-deformation controlling heat treatment process for forming position of special-shaped curved surface part

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Effect test

Embodiment 1

[0029] A heat treatment process controlled by micro-deformation at the forming position of curved surface special-shaped parts, which includes the following steps:

[0030] S1. Preliminary molding processing: processing the curved surface and irregular size at the point to be formed of the part, reducing the tolerance level of its size by 1;

[0031] S2. Furnace loading: put the processed parts into a vacuum heating furnace, and vacuumize to make the pressure at 0.1Pa;

[0032] S3, such as figure 1 As shown, the heating treatment includes the following heating steps: a. Heating up at a uniform speed until the furnace temperature reaches 550°C, the heating rate is 1.5°C / s, and holding for 50 minutes; 30min; c. Continue to heat up to 1000°C at a constant speed, with a heating rate of 8°C / min, and hold for 30 minutes; d. Continue to heat up to 1120°C at a constant speed, with a heating rate of 5°C / min, and hold for 25 minutes;

[0033] S4. Micro-deformation heat treatment: Intr...

Embodiment 2

[0040] A heat treatment process controlled by micro-deformation at the forming position of curved surface special-shaped parts, which includes the following steps:

[0041] S1. Preliminary processing of forming: processing of curved surface and special-shaped size at the point to be formed of the part, the tolerance level of the size is required to be reduced by 2 levels;

[0042] S2. Furnace loading: put the processed parts into a vacuum heating furnace, and vacuumize to make the pressure at 0.001Pa;

[0043] S3. Heating treatment, including the following heating steps: a. Heating up at a constant speed until the furnace temperature reaches 500°C, with a heating rate of 1°C / s, and holding for 55 minutes; b, continuing to heat up at a uniform speed to 750°C, with a heating rate of 8°C / min, and holding for 35 minutes ; c. Continue to heat up to 950°C at a constant speed, with a heating rate of 10°C / min, and keep warm for 35 minutes; d, continue to heat up to 1100°C at a constan...

Embodiment 3

[0051] A heat treatment process controlled by micro-deformation at the forming position of curved surface special-shaped parts, which includes the following steps:

[0052] S1. Preliminary processing of forming: processing of curved surface and special-shaped size at the point to be formed of the part, the tolerance level of the size is required to be reduced by 2 levels;

[0053] S2. Furnace loading: put the processed parts into a vacuum heating furnace, and vacuumize to make the pressure at 0.02Pa;

[0054] S3. Heating treatment, including the following heating steps: a. Heating up at a constant speed until the furnace temperature reaches 600°C, with a heating rate of 2°C / s, and holding for 60 minutes; b, continuing to heat up at a constant speed to 850°C, with a heating rate of 10°C / min, and holding for 40 minutes ; c. Continue to heat up to 980°C at a constant speed, with a heating rate of 9°C / min, and hold for 40 minutes; d, continue to heat up to 1200°C at a constant spe...

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Abstract

The invention discloses a micro-deformation controlling heat treatment process for a forming position of a special-shaped curved surface part. The process comprises the following steps of: S1, preliminary working of forming; S2, charging; S3, temperature raising: raising the temperature at a uniform speed till the furnace temperature reaches 500-600 DEG C, continuously raising the temperature to 750-850 DEG C at the uniform speed, continuously raising the temperature to 950-1000 DEG C at the uniform speed and continuously raising the temperature to 1100-1200 DEG C at the uniform speed; S4, micro-deformation heat treatment: introducing protective gas for cooling, performing quick cooling to 300-400 DEG C, and performing discharge at a constant temperature for 5-10min; S5, high-temperature tempering treatment; S6, deep cooling treatment; S7, hard control tempering; S8, stable structure tempering; and S9, polishing treatment. The process disclosed by the invention has the beneficial effects that the problem that the micro-deformation of the forming position of the special-shaped curved surface part which is high in hardness and hard to process is hard to control; the machining process of the special-shaped curved surface part is simplified, and the processing efficiency is increased.

Description

technical field [0001] The invention relates to the technical field of heat treatment, in particular to a heat treatment process for micro-deformation control of the forming position of curved surface special-shaped parts. Background technique [0002] In the mold industry, due to the continuous improvement of product functions, its product structure is becoming more and more complex, and there will be more and more types of curved surface special-shaped parts, such as processing an undercut structure with precision requirements on a curved surface. Molds need to have high hardness and wear resistance, and at the same time have very strict requirements on their dimensions, and their dimensional tolerances often reach IT2-IT8. IT2 parts are mainly used for high-precision measuring tools, especially important precision The matching size is also the tolerance level that needs to be achieved in the mold. Especially for mold companies, the molding position for parts with high ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/773C21D8/00C21D6/04C21D9/00B23P15/00
CPCC21D1/773B23P15/00C21D6/04C21D8/00C21D9/0068
Inventor 赵东陈斌
Owner CHENGDU LIANYU PRECISION MACHINERY
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