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What is the Stress?How to relieve it?

Trwy admin Mewn Celf, Newyddion Postiwyd 2020-07-14

Annealing heat treatment or tempering heat treatment is often used in production to eliminate stress, to prevent all kinds of adverse effects of stress, but the reality is often unsatisfactory, heat treatment can not completely eliminate stress, there may be problems such as workpiece deformation accuracy is affected.

What is the Stress?
Thermal Stress:
During the heating and cooling process of the workpiece, temperature gradients, thermal expansion or contraction and thermal shocks are things that can lead to thermal stress. In general, the greater the temperature change, the higher the level of stress that can occur. Thermal shock can result from a rapid change in temperature, resulting in cracking or shattering. That is, thermal stress.

Structural Stress:
On the other hand, due to the change of microstructure, that is, the transformation from austenite to martensite, the increase of specific volume will be accompanied by the expansion of workpiece volume, and each part of the workpiece will transform successively, resulting in inconsistent volume growth and structural stress. The final result of the change of tissue stress is tensile stress in the surface layer and compressive stress in the center, which is just opposite to the thermal stress. The size of the microstructure stress is related to the cooling rate, shape and chemical composition of the material.

How to relieve the Stress?
Practice has proved that any workpiece in the heat treatment process, as long as there is a phase transition, thermal stress and structural stress will occur.
No process can eliminate stress 100%, the purpose of eliminating stress is also very different, some need to ensure product accuracy, some need to increase product strength and so on, as long as the level of stress reduction can achieve our purpose, no matter what means is the right process.

FUCHUN CASTING’s experience and state-of-the-art facilities allow for precise, controlled heat treatment for stress relieving steel and other metals. We also ensure all of our processes is constantly monitored and tracked for quality control throughout the process.


If you are interested in us,please contact us freely.We'll offer you a suitable and perfect solution.
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