Compressive strength test method for surface strengthening layer and substrate of axial part

A technology of surface strengthening layer and compressive strength, which is applied in the direction of applying stable tension/compression to test the strength of materials and the preparation of test samples, so as to achieve reliable and accurate data and strong operability

Active Publication Date: 2015-01-14
TIANJIN ENG MACHINERY INST
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  • Summary
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Problems solved by technology

Therefore, in order to ensure the normal use of the parts and the safe operation of the machine, the compressive strength of the carburized shaft must be measured, but so far, there is no published data

Method used

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  • Compressive strength test method for surface strengthening layer and substrate of axial part
  • Compressive strength test method for surface strengthening layer and substrate of axial part

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Embodiment Construction

[0026] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0027] The structural shape of a workpiece that has been ground to a flat side is as follows figure 1 figure 2 shown.

[0028] A method for testing the compressive strength of a surface strengthening layer and a matrix of a shaft part, comprising the following steps:

[0029] a. Carburizing heat treatment steps: For the workpiece after machining, the gas carburizing method is adopted, the heating temperature is 900-930°C, the holding time is 4-7h, the carburized test part is cooled to 760-850°C and quenched directly, and then Temper at 160-200°C for 2-3 hours.

[0030] b. The finishing step of the surface of the tested part, the finishing step is grinding the outer circle of the part on a cylindrical grinding machine, and the surface roug...

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Abstract

The invention relates to a compressive strength test method for the surface strengthening layer and the substrate of an axial part. The method comprises the following steps: loading workpieces step by step to determine the pressure range for realizing damage on the workpieces, and then adopting a bisection approach method to precisely determine the pressure value for realizing damage. The method is simple, convenient and intuitive and has the advantages of strong operability reliable and accurate data and the like.

Description

technical field [0001] The invention belongs to the technical field of mechanical property detection technology of metal materials, and in particular relates to a method for testing the compressive strength of a surface strengthening layer and a matrix of shaft parts. Background technique [0002] In practical applications, shaft parts are often required to have comprehensive properties such as high strength, toughness, surface hardness and wear resistance. Carburizing is a chemical heat treatment process that is often used. After carburizing, quenching and low-temperature tempering can improve the surface and core structure, and obtain a high-hardness and high-strength surface layer, a certain toughness sub-surface layer and the core. Hard and tough inside, combining high strength and certain toughness on the same part. [0003] Under certain conditions of use, the compressive strength of carburized shafts is an important factor in determining the service life of shaft par...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08G01N1/44G01N1/28
Inventor 刘俊英蒋伯平张慧星胡晓丽张国胜
Owner TIANJIN ENG MACHINERY INST
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