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A method for measuring the tensile strength of gleeble high temperature compression specimens

A tensile strength, high temperature compression technology, applied in the direction of applying stable tension/compression to test material strength, strength characteristics, measuring devices, etc., can solve problems such as difficulty in determining accuracy, and achieve true tensile strength and accurate results. Effect

Active Publication Date: 2020-09-25
INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hardness value conversion method is an indirect method. Although the efficiency is high, the accuracy is difficult to judge. Therefore, there is no sufficient basis for using it as a parameter index to guide the mechanical properties.

Method used

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  • A method for measuring the tensile strength of gleeble high temperature compression specimens
  • A method for measuring the tensile strength of gleeble high temperature compression specimens
  • A method for measuring the tensile strength of gleeble high temperature compression specimens

Examples

Experimental program
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Effect test

Embodiment 1

[0019] 1) Cut the Gleeble high-temperature compressed small round cake sample into thin slices with a thickness of 1 mm to 2 mm in the radial direction by wire cutting;

[0020] 2) After inlaying the cut thin slice sample with a hot mounting machine, grind and polish it with a metallographic grinding machine to make the thickness uniform and the surface roughness better than R a 1.6μm, remove the mounting material and take out the thin slice sample; repeat the above steps to grind and polish the other side;

[0021] 3) Cut the ground and polished thin slice sample into an I-shaped sample with a width of 1 mm to 2 mm, a parallel length of 3 mm, and a transition arc R of 1.5 mm;

[0022] 4) Cut the I-shaped sample (such as figure 1 shown) fixed on a small cloth grinder, and the side of the sample was ground to make the surface roughness on both sides better than R a 1.6μm;

[0023] 5) Put the ground I-shaped wheel sample into the self-made fixture matched with the 5kN materia...

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Abstract

The invention relates to a method for determining the tensile strength of a Gleeble high-temperature compression sample. According to the method, a small cylinder compression sample is cut into an I-shaped sample through linear cutting; the I-shaped sample is subjected to grinding and polishing so as to allow the surface roughness of the I-shaped sample to meet the requirements of GB / T 228.1-2010on room-temperature tension testing methods; and a self-made tensile fixture is mounted on a material testing machine for tension testing so as to obtain the actual tensile strength value of the I-shaped sample. Compared with traditional methods for converting hardness values into strength values, the method provided by the invention is more accurate and reliable and can be applied to the technical field of simulated rolling.

Description

technical field [0001] The invention belongs to the technical field of simulated rolling, in particular to a method for measuring the tensile strength of Gleeble high-temperature compressed small round cake samples. Background technique [0002] In the research and development of metal products, a series of tests such as rolling simulation (high-temperature compression, high-temperature tension) are usually carried out on the thermal simulation testing machine Gleeble, and because the sample that has completed the high-temperature compression test is too small (usually the diameter Less than 16mm), so the tensile strength cannot be obtained directly by tensile test. At present, the more commonly used method is to convert the measured Vickers hardness value according to the GB / T 1172-1999 standard to obtain the tensile strength value. The hardness value conversion method is an indirect method. Although the efficiency is high, the accuracy is difficult to determine. Therefore...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08G01N3/04
CPCG01N3/04G01N3/08G01N2203/0017G01N2203/0282G01N2203/0423
Inventor 岑风张珂褚峰
Owner INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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