If the selected cold treatment method is not correct, the performance of the high-precision cold drawn pipe will be affected. Therefore, it is necessary to take preventive measures during the cold treatment process, but most people do not know how to do this. In fact, the main content lies in the following points.
Before the cold treatment, it should be boiled in boiling water for 30 seconds, so that the internal stress can be reduced by about 15%, and then the cold treatment can be carried out in the usual way. Of course, the next recommendation is to choose minus 60. The conventional treatment at ℃, and then the deep cooling of minus 120 ℃, the lower the treatment temperature, the high-precision cold-drawn tube will cause the retained austenite inside to transform into martensite, but it is impossible to fully transform. After the experiment, it can be found that basically there will be about 2% residual, then the residual austenite needs to be retained at this time, which can play a buffer 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 treatment, so that about 40% of the cold treatment stress can be reduced, and it should be tempered as soon as possible after the gradual heating. Cold treatment, most of which can be reduced as soon as possible, and can also reduce the appearance of cracks, so as to obtain stable performance, so that the product will not be deformed in the later use process, and it is also convenient for daily storage. These are actually other cold treatments. Some of the preventive measures, if you can do it well, it will not have a big impact.
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