Device for testing on thermal simulation test machine

Abstract

The invention discloses a device for realizing a high temperature plane strain compression test on a thermal simulation test machine. High hardness profiled pressure heads are located at upper and lower ends of a sample. Insulation and high pressure-resistant side base plate and end base plate are respectively located in grooves in the end surface and inner side of a high-strength fixed plate. Thecombined fixed plates are respectively located in left and right sides of the sample. The combined fixed plates are fixed through four through holes of the fixed plate, high-strength bolts, washers and nuts to limit the deformation of the sample in the normal line of the fixed plate so that plane strain is formed. Compared with the existing test device, the device has the characteristics of uniform temperature distribution of the sample, high accuracy of the test data, small size, simple structure and convenient disassembling.

Description

technical field [0001] The invention relates to a device for realizing plane strain compression test of metal materials in a high temperature state. Background technique [0002] The plane strain problem is one of the typical deformation behaviors of metal materials, such as spinning deformation, rolling deformation, etc. There is no strain in the direction perpendicular to the strain plane during deformation. The conventional plane strain compression test was carried out on a Gleeble thermal simulation testing machine. The long and wide plate was used as the sample, and the narrow, long and narrow hammer was used as the compression anvil to test the stress-strain curves under different deformation parameters. This kind of test method generally has three shortcomings: first, the neglected strain in the unstrained direction, although its value is small but real, the data obtained from the test cannot really describe the plane strain problem; second, due to the relatively smal...

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Problems solved by technology

This type of test method generally has three deficiencies: First, the strain that is neglected in the no-strain direction, although its value is small, actually exists, and the data obtained from the test cannot really describe the plane strain problem; second, due to the small size of the sample Large, there is an uneven temperature distribution when the sample is heated, which does not match the set deformation temperature, resulting in inaccurate test data; third, when the compression deformation is tested, the tangential deformation trend along the 45° direction is obvious, which is very important for the deformation test. Observation of sample tissue has a greater influence

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