What Is Involved in Stress Relieving Steel?

From the aluminum alloy steel frame of the aerospace satellite to the small screw, any output workpiece will generate stress. How to deal with the workpiece stress quickly and environmentally is a headache for all companies related to the word "mechanical". problem. All companies related to the word "mechanical" need to face the problem of eliminating stress on the workpiece.

"

"Mechanical" companies may use it.

Any produced workpiece will generate stress. This kind of force comes from the workpiece itself. For example, the iron parts will be bent and deformed for a long time. This is the change of stress on the workpiece. Once the workpiece is deformed, it will affect the accuracy of the use. This problem must be solved by eliminating stress, especially those that must be transported long distances and used in the military and aerospace fields.

Looking around the world, there are about four ways to relieve stress.

One is

At present, the methods of stress relief in China are as follows:

1. Using thermal aging method, put the workpiece into heat

Stress Relieving refers to heat treatment performed to relieve stress.

Removal of stress, annealing, casting, forging, welding parts during the cooling due to different cooling rates in each part of the internal stress, metal and alloys in cold deformation processing and workpieces also generate internal stress during the cutting process. If the internal stress is not removed in time, the workpiece will often be deformed or even cracked. Stress-relief annealing is to slowly heat the workpiece to a lower temperature (for example, gray cast iron is 500-550 ° C, steel is 500-650 ° C), and hold it for a period of time to relax the interior of the metal and then slowly cool it down. It should be noted that stress-relief annealing does not completely remove internal stress, but only partially removes it, thereby eliminating its harmful effects ^[1]

• Chinese name

• Eliminate stress cracks

• English name

• stress relief crack

• definition

• When the weldment is reheated in a certain temperature range after welding, intergranular cracks due to the combined effect of high temperature and residual stress.

• Applied discipline

• Mechanical engineering (first-level discipline), welding and cutting (second-level discipline), welding defects and inspection (third-level discipline)