Analysis method of material failure crack source

An analysis method and material failure technology, applied in the direction of analyzing materials, instruments, measuring devices, etc., can solve the problems of wear, determine the crack source, cannot observe the crack source extension line, scallop line, etc., to avoid serious wear, reduce Interfere, avoid exposure to oxidative effects

Active Publication Date: 2021-06-01
BAOSTEEL SPECIAL STEEL SHAOGUAN CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In one case, if the crack source of the part is generated during the processing, and after multiple subsequent processing or processing, the crack source fracture of the part will be oxidized many times. At this time, the crack source cannot be determined by the fracture or structure of the crack source. link
[0006] In another case, if the working conditions of the part are relatively complicated, after the crack source is generated in the part, the fracture near the crack source will be worn under stress, severely oxidized, rusted or polluted by oil, and the expansion line and shell pattern of the crack source cannot be observed. line, the location of the crack source cannot be determined

Method used

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  • Analysis method of material failure crack source
  • Analysis method of material failure crack source
  • Analysis method of material failure crack source

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0076] An analysis method for a material failure crack source, comprising:

[0077] S1. Take 4 forged blanks made of 60Si2Mn from the same batch as samples. The processing technology of the forged blank is blanking, heating and then forging, and there are cracks at the end after the forging is completed.

[0078] Among them, a forged blank was forged to complete a sample for one forging cycle, and a fractured part with severe cracking at the end was obtained, as shown in figure 1 shown. The part where the end of the sample is cracked is taken as the failure sample, and one cycle of its forging is the failure cycle.

[0079] The other three samples were forged for 1 / 4 forging cycle, 2 / 4 forging cycle and 3 / 4 forging cycle respectively, and then the ends were cut off, respectively used as intermediate samples, and numbered as sample No. 1 in sequence , No. 2 sample and No. 3 sample. And number the broken part as No. 4 sample. No. 1 sample, No. 2 sample, No. 3 sample and No....

Embodiment 2

[0094] An analysis method for a material failure crack source, comprising:

[0095] S1. Take a round steel with a material of GCr15 (YF) and a diameter of 42 mm as a sample. The processing technology of this sample is blanking, turning chips, heat treatment, abrasives, and then a mandrel is obtained.

[0096] Among them, the rod body that is abnormally broken after the mandrel is used is used as the broken part, such as Figure 5 ~ Figure 7 As shown in Fig. 1, the height of the fracture at the end of the sample fluctuates seriously, and the crack source is more than one, which is multi-source cracking. The fracture at the end of the sample is taken as the failure sample.

[0097] Take a sample at a distance of 10mm from the fracture, numbered as sample No. 5, such as Figure 8 shown.

[0098] Take a sample at a distance of 20mm from the fracture, numbered as sample No. 6, such as Figure 9 shown.

[0099] S2. Observe No. 5~6 samples, please refer to Figure 8 , No. 5 sam...

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Abstract

The invention provides an analysis method of a material failure crack source, and belongs to the field of material detection. The analysis method of the material failure crack source comprises the steps of acquiring a failure sample and at least one intermediate sample from parts in the same batch or the same part, wherein the failure sample is taken from the fractured part of the part, and the intermediate sample is taken from the unfractured part of the part; selecting an intermediate sample with an intermediate crack as a crack sample, wherein the the position of the intermediate crack corresponds to the fracture position of the failure sample; and determining the position of the failure crack source of the part according to the position of the intermediate crack in the crack sample. According to the analysis method, the interference of the use environment and the machining process of the part on crack source searching can be effectively reduced.

Description

technical field [0001] The present application relates to the field of material testing, and in particular, to an analysis method for material failure crack sources. Background technique [0002] The failure of materials, especially the failure of metal mechanical parts during the use of metal materials, has a great impact on personal safety and property safety. In order to prevent repeated failures and effectively improve product quality, it is necessary to find out the cause of material failure, and conduct a systematic analysis of the material failure mechanism, then prevent and control the cause of material failure, and then carry out technological development and improvement, and finally improve product quality . Therefore, material failure analysis has strong practical significance for improving product quality and arbitrating failure accidents. [0003] Material failure analysis begins with finding the source of the failure crack. The existing techniques for findin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/2045
CPCG01N33/2045
Inventor 廖美华陆伟成刘年富李华强彭娟董凤奎王银国何健楠杨雄强杨明梅刘文姗
Owner BAOSTEEL SPECIAL STEEL SHAOGUAN CO LTD
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