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The grain size control of high strength seamless steel pipe in the heat treatment process is very necessary, it has a very important effect on the quality of seamless steel pipe heat treatment. The following will be how to control the grain size are summarized below.
(1) Choose a reasonable heating temperature
Heating temperature is too low, the formation of high strength seamless steel pipe slow, or even not fully formed, unable to achieve the requirements of heat treatment. Heating temperature is too high, it is easy to get coarse austenite grains, resulting in reduced performance. Therefore, it should be based on the chemical composition of seamless steel tubes, the shape and size of parts, with or without special requirements, changes in cross-section and specific technical requirements and other aspects to a reasonable choice of heating temperature.
(2) To determine the reasonable and optimal holding time is designed to make it through the heat, and make the composition of high strength seamless steel pipe fully uniform. Insulation time should be taken into account two points, the time is too long cause or cause austenite crystal f, will also extend the production cycle, reduce work efficiency, is not conducive to heat treatment.
Read more : seamless carbon steel pipe
Article source: https://article-realm.com/article/Finance/28159-Methods-for-controlling-grain-size-of-seamless-steel-pipes.html
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