Effect of Reheating Temperature on Austenite Grain Size and Solid Solution of Second Phase Particles of the Pipeline Steel Slab

机译：再加热温度对管线钢板二相颗粒奥氏体晶粒尺寸和固溶液的影响

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Effect of reheating temperature on austenite grain size and solid solution of second phase particles of X70 pipeline steel slab was researched by using optical microscope. The results show that the microstructures are homogeneous and the grain size increases slowly with the reheating temperature increases from 1120°C to 1180°C. However, the abnormal growth phenomenon can be observed in the specimens reheated at 1210°C.The reason is that all second phase particles except TiN, dissolves in austenite at 1210°C. The temperature range from 1140°C to 1180°C is suitable for reheating X70 steel slab.

机译：用光学显微镜研究了再加热温度对X70管道钢板二相颗粒的奥氏体晶粒尺寸和固溶体的影响。结果表明，微观结构是均匀的，并且晶粒尺寸缓慢增加，再加热温度从1120℃增加至1180℃。然而，在1210℃重新加热的标本中可以观察到异常生长现象。原因是除锡外的所有第二相颗粒，在1210℃下溶解在奥氏体中。从1140°C至1180°C的温度范围适用于再加热X70钢板。

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《International Conference on Manufacturing Technology, Materials and Chemical Engineering》|2018年|818 p.|共5页
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Xin Zhao; Lei Chen;
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中图分类工程材料学;
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Effect of Reheating Temperature on Austenite Grain Size and Solid Solution of Second Phase Particles of the Pipeline Steel Slab

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