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

A technology of surface strengthening layer and shaft parts, which is applied in the field of compressive strength testing of the surface strengthening layer and matrix of shaft parts, to achieve the effect of strong operability, reliable and accurate data

Active Publication Date: 2013-04-17
TIANJIN ENG MACHINERY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

[0025] In order to further understand the content of the invention, features and effects of the present invention, the following embodiments are exemplified and described in detail with the accompanying drawings as follows:

[0026] The structural shape of a workpiece that has been ground to a flat side such as figure 1 figure 2 shown.

[0027] A method for testing the compressive strength of a surface strengthening layer and a matrix of a shaft part, comprising the following steps:

[0028] a. Carburizing heat treatment steps: The gas carburizing method is used for the machined workpiece, the heating temperature is 900-930 °C, the holding time is 4-7 h, the carburizing test block is cooled to 760-850 °C and directly quenched, and then quenched at 160 °C. Temper at ~200℃ for 2~3h.

[0029] b. The finishing step of the surface of the shaft part, the finishing step is to grind the outer circle of the part on the cylindrical grinding machine, and the surface roughness of the ...

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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, in particular to a method for testing the compressive strength of a surface strengthening layer and a matrix of a shaft part. 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, the parts are quenched and tempered at low temperature, which can improve the surface and core structure, and obtain a surface layer with high hardness and high strength, a subsurface layer and a core with certain toughness. Hard inner toughness, combining high strength and certain toughness on the same part. [0003] Under certain conditions of use, the compressive strength of the carburized shaft is an important factor in determining the servi...

Claims

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Application Information

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Patent Type & Authority Applications(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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