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Testing experiment method for reducing heat treatment deformation and optimizing heat treatment technology

A technology of heat treatment deformation and test method, which is used in the field of testing and testing to reduce heat treatment deformation and optimize heat treatment process to achieve the effects of improving fatigue resistance, quality and uniformity of quality.

Pending Publication Date: 2019-09-06
沈阳中金模具集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is the heat treatment process optimization and improvement test problem for reducing heat treatment deformation, and a test method for reducing heat treatment deformation and optimizing heat treatment process is provided

Method used

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  • Testing experiment method for reducing heat treatment deformation and optimizing heat treatment technology
  • Testing experiment method for reducing heat treatment deformation and optimizing heat treatment technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1 A test method for reducing heat treatment deformation and optimizing heat treatment process scheme

[0036] Distortion sample material 40CrNi2Mo, its chemical composition: C: 0.42wt.%; Si: 0.27wt.%; Mn: 0.61 wt.%; Cr: 0.71 wt.%; Ni: 1.68wt.%; S: 0.005 wt. %; P: 0.012 wt.%; Mo: 0.23 wt.%; Fe: balance, to conduct a test experiment to reduce heat treatment deformation and optimize heat treatment process plan, including the following steps:

[0037] (1) Sample shape and size according to figure 1 Distortion test sample, processed and manufactured by the method of the present invention;

[0038] (2) Apply anti-carburization coating with a thickness of 0.3mm, adopt the method of dip coating, and dry naturally for 2 hours;

[0039] (3) The original size of the sample is measured, and the measured original size is shown in Table 1: "opening size before normalizing";

[0040] (4) Optimized heat treatment process plan, normalizing at 860°C + quenching at 860°C + temp...

Embodiment 2

[0050] Example 2 A test method for reducing heat treatment deformation and optimizing heat treatment process parameters

[0051] Distortion sample material 40CrNi2Mo, its chemical composition: C: 0.42wt.%; Si: 0.27wt.%; Mn: 0.61 wt.%; Cr: 0.71 wt.%; Ni: 1.68wt.%; S: 0.005 wt. %; P: 0.012 wt.%; Mo: 0.23 wt.%; Fe: balance, to conduct a test experiment to reduce heat treatment deformation and optimize heat treatment process parameters, including the following steps:

[0052] (1) Sample shape and size according to figure 1 Distortion test sample, processed and manufactured by the method of the present invention;

[0053] (2) Apply anti-carburization coating with a thickness of 0.3mm, adopt the method of dip coating, and dry naturally for 2 hours;

[0054] (3) The original size of the sample is measured, and the measured original size is shown in "Original Size" in Table 3;

[0055] (4) Optimized heat treatment process parameters, 860°C quenching (650°C for 1 hour, heating rate ...

Embodiment 3

[0065] Example 3 A test method for reducing heat treatment deformation and optimizing heat treatment furnace loading

[0066] Distortion sample material 40CrNi2Mo, its chemical composition: C: 0.42wt.%; Si: 0.27wt.%; Mn: 0.61 wt.%; Cr: 0.71 wt.%; Ni: 1.68wt.%; S: 0.005 wt. %; P: 0.012 wt.%; Mo: 0.23 wt.%; Fe: balance, to reduce heat treatment deformation and optimize heat treatment furnace test, test the deformation of different parts of the furnace under two different process parameters, and use The furnace loading operation for this optimized heat treatment includes the following steps:

[0067] (1) Sample shape and size according to figure 1 Distorted sample, processed and manufactured according to the method of the present invention;

[0068] (2) Apply anti-carburization coating with a thickness of 0.3mm, adopt the method of dip coating, and dry naturally for 2 hours;

[0069] (3) The original size of the sample is measured, and the measured original size is shown in Ta...

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Abstract

The inventio discloses a testing experiment method for reducing heat treatment deformation and optimizing heat treatment technology. The testing experiment method for reducing the heat treatment deformation and optimizing the heat treatment technology can be used for a deformed testing sample of conventional heat treatment, and includes steps: using slow wire cutting for processing the deformed testing sample, using a metallographic abrasive paper for sanding the deformed testing sample, measuring the original size of the deformed testing sample, using gasoline for washing the deformed testingsample, painting the deformed testing sample with anti-carburizing paint and anti-oxidation paint, setting the deformed testing sample according to the profile of a heat treatment furnace and the structure size of a workpiece, performing a testing experiment for reducing the heat treatment deformation in the heat treatment furnace, measuring the size of the deformed testing sample after being treated, calculating and analyzing deformation rate, performing the testing experiment once more after optimizing the heat treatment technology, and enabling deformation resistance to reach the optimization by optimizing the heat treatment technology. The testing experiment method for reducing the heat treatment deformation and optimizing the heat treatment technology can save a large amount of experiment material and processing cost, substantially reduces the heat treatment deformation of the workpiece, substantially improves heat treatment quality of the workpiece, substantially improves quality uniformity of the workpiece, substantially improves fatigue resistance of the workpiece, and thereby substantially prolongs use life of the workpiece.

Description

technical field [0001] The invention relates to the technical field of heat treatment process, in particular to a test method for reducing heat treatment deformation and optimizing heat treatment process. Background technique [0002] At present, the methods for improving the deformation of the heat treatment process are all based on the technical analysis of the actual workpiece deformation to propose improvement measures, and then directly carry out the improvement test on the actual workpiece. Experimenting with actual workpieces is inconvenient to operate and difficult to implement. There is a risk of scrapping the workpiece, wasting a lot of raw materials, affecting the manufacturing cycle, and taking a long time to improve. The effect is not ideal because it affects the heat treatment deformation. There are 77 factors, and these 77 factors are mixed together and interacted together. It is difficult to find out the main factor or root cause of heat treatment deformation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D11/00C21D1/18G01B5/30
CPCC21D1/18C21D11/00G01B5/30
Inventor 赵仲宁
Owner 沈阳中金模具集团有限公司
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