Introduction to Cold and Hot Impact Test Methods

Date：2023-08-24 16:40:00Views：229

Cold and hot impact testing is a method of testing the durability and stability of products or materials under extreme temperature changes. Usually, this experiment exposes the tested product or material to extreme high and low temperature environments to simulate temperature changes in the real world, and then quickly transitions to another extreme temperature. This process will be repeated multiple times to simulate temperature changes and impacts during prolonged use. This article summarizes some materials and hopes to provide valuable references for readers.

The main function of cold and hot impact testing is to simulate severe changes in environmental temperature. It is mainly applicable to fields such as batteries, automotive components, semiconductors, aviation, automobiles, scientific research, etc., to test the reliability of products. The physical or chemical changes that occur through the principle of thermal expansion and contraction within a short period of time through testing can greatly shorten the natural testing cycle of products and improve product efficiency.

In cold and hot shock tests, the sample is usually placed in a closed laboratory with controllable temperature and humidity. The sample is first exposed to extreme high temperature environments and then quickly transferred to extreme low temperature environments, or vice versa. This rapid temperature change can lead to thermal expansion and contraction of the material, resulting in stress and strain, which in turn affect the performance and reliability of the material.

Cold and hot impact tests can be divided into two types, namely linear and nonlinear. In the linear thermal shock test, the temperature change of the sample is linear, such as from room temperature to -40 ° C, and then to+85 ° C. In nonlinear cold and hot impact tests, the temperature change of the sample is irregular, for example, from room temperature to -70 ° C in a short period of time, and then from room temperature to+150 ° C in another short period of time.

The results of cold and hot impact tests can be used to evaluate the reliability and durability of materials. For example, plastic parts used in electronic devices may be affected by temperature changes, leading to cracks and deformation, leading to equipment failure. By conducting cold and hot impact tests, the maximum operating temperature range of the material can be determined to avoid these issues.

This test method can be used for various materials, including plastics, metals, and ceramics. If conducting liquid testing, the test sample (liquid) needs to be transported back and forth through a basket to two different zones, namely the high temperature zone and the low temperature zone. This is not applicable to electrical products.

The above is the relevant introduction of cold and hot impact testing, hoping to provide you with some reference! Before conducting the test, we need to confirm what material the test sample is made of, and then make a distinction, choose a suitable test method, and better accelerate the process of the test.