Huanren Lab

 Project Introduction

High temperature testing is a reliability test that simulates the high temperature resistance of a product during storage, assembly and use. High temperature testing is also the longest accelerated life test. The purpose of high-temperature testing is to determine the adaptability and durability of storage and use of military and civilian equipment and components under normal temperature conditions. Confirm the performance of the material at high temperatures.

The purpose of low-temperature testing is to check whether the test pieces can be stored and operated and controlled in a long-term low-temperature environment, and to determine the adaptability and durability of military and civilian equipment in storage and operation under low-temperature conditions. Physical and chemical properties of materials at low temperatures. The standard has specifications for pre-test treatment, initial test testing, sample installation, intermediate test testing, post-test treatment, temperature increase speed, load conditions of the temperature cabinet, and volume ratio of the measured object to the temperature cabinet.

Failure mode of test pieces under low temperature conditions: the parts and materials used in the product may crack, brittleness, movable part stuck, and change characteristics at low temperatures.

The impact of low temperature

1. Make the material hard and brittle;
2. The viscosity of the lubricant increases, the flow capacity decreases, and the lubricating effect decreases;
3. The performance of electronic components changes;
4. Water-cooled condensation and freezing;
5. The seal fails;
6. The shrinkage of the material causes changes in the mechanical structure.

High temperature application range

High and low temperature testing mainly targets electricians, electronic products, their original devices, and other materials. The strictness of the test depends on the temperature of the high and low temperatures and the continuous test time. High and low temperatures may overheat the product, affect the safety and reliability of use, and even damage, such as:

· Due to the different expansion coefficients of various materials, bonding and migration between materials

· Change material properties

· Degrading the electrical performance of components

· The elastic or mechanical properties of elastic components are reduced, shortening the service life of the product

· Accelerate the deterioration and aging process of polymer materials and insulating materials, and shorten the service life of the product.

· The elasticity of flexible materials such as rubber is reduced and cracks occur;

· The brittleness of metals and plastics increases, resulting in cracks or cracks;

· Making the material brittle, such as plastics and steel easily become brittle and cracked at low temperatures, increasing the hardness of rubber materials, and decreasing elasticity.

Low temperature application range

Low temperature testing is mainly used for scientific research, preservation of medical and Liaoning products, low temperature experiments and storage of special materials such as biological products, ocean products, electronic components, chemical materials, etc.

High temperature reference standard

Test standards reference: GB/T 2423.1, GB/T 2423.2, IEC 60068-2-1, IEC 60068-2-2, EN 60068-2-1, EN 60068-2-2, etc.

Low temperature reference standard

GB/T2423.1-2008 "Environmental Test of Electrical and Electronic Products Part 2: Test Method Test A: Low Temperature"
IEC 60068-2-1:2007 "Environmental Test of Electrical and Electronic Products Part 2: Test Method Test A: Low Temperature"