If the selected cold treatment method is incorrect, the performance of high-precision cold drawn tubes will be affected. Therefore, preventive measures need to be taken during the cold treatment process, but most people do not understand how to do this. , in fact, the main content lies in the following points.
Before cold treatment, it should be boiled in boiling water for 30 seconds. This can reduce the internal stress by about 15%. Then it can be cold treated in the conventional way. Of course, the first recommendation is to choose minus 60 Routine treatment at -120 degrees Celsius, and then cryogenic cooling at -120 degrees Celsius. The lower the treatment temperature, the high-precision cold drawn tube will cause the residual austenite inside to transform into martensite, but it is impossible to completely transform. After the experiment, it can be found that there is basically about 2% residue, so at this time it is necessary to retain the residual austenite, which can have a buffering effect.
After the cold treatment is completed, the high-precision cold drawn tube also needs to be taken out and placed in hot water for heating. This can reduce the cold treatment stress by about 40%. After the gradual heating, it should also be tempered as soon as possible. Most of the cold treatment can be reduced as quickly as possible, and it can also reduce the occurrence of cracks, thereby obtaining stable performance, so that the high-precision cold drawn tube will not deform during later use, and it is also convenient for storage in daily life. These are actually That is to say, some preventive measures for cold treatment. If you can do it well, it will not have a big impact.
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