Device for low-temperature stretching test of metal material

Abstract

The invention discloses a device for a low-temperature stretching test of a metal material. The device comprises a box body device for containing samples, a liquid nitrogen device system for cooling and a temperature control system for controlling the test temperature, wherein the box body device comprises an inner layer, a middle protection layer, an outer layer, a base and a box cover; the liquid nitrogen device system comprises a liquid nitrogen tank, a guide pipe, a guide pipe interface, an internal liquid nitrogen pipe, a gasification net and a liquid discharging valve; the temperature control system consists of a temperature sensor and a temperature control adjustment system. The device is simple and convenient to operate, reasonable in design, uniform in temperature and accurate in test results, can be used for accurately controlling the test temperature to range from 0 DEG C to minus 196 DEG C, omitting the trouble of modifying an existing stretching test machine and saving the cost, and is safe and efficient.

Description

technical field [0001] The invention relates to a testing device, in particular to a device for low-temperature tensile testing of metal materials. Background technique [0002] With the rapid development of various modern industries, more and more steel materials need to be used in low temperature environments, such as low temperature pressure vessels, bridges, low temperature rebar for building materials, etc. It is very important, especially the tensile performance indicators such as yield strength, tensile strength, elongation and area shrinkage of the sample. However, due to the limitations of equipment and related conditions, there has not been an accurate and simple measurement method for the measurement of mechanical properties of materials in low temperature environments, especially tensile tests. [0003] The temperature of liquid nitrogen is minus 196 degrees, and the sample for measuring the performance of minus 196 degrees can be directly measured in the li...

AI Technical Summary

Problems solved by technology

However, for the measurement of mechanical properties of materials in low temperature environments, especially tensile tests, due to the limitations of equipment and related conditions, there has not been an accurate and simple measurement method.

[0003] The temperature of liquid nitrogen is minus 196 degrees, and the sample for measuring the performance of minus 196 degrees can be directly measured in the liquid, but when the temperature range of the performance of the sample to be tested is between 0°C and (-196°C), it is difficult to accurate temperature control

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