研究了一种适用于管道钢管和管件制造的X70级管线钢在不同加热温度下的奥氏体晶粒长大规律和组织-性能间的关系。
The article discusses and finds the Auster grain growing rules and relations of structure and properties of X70 steel in weld pipe and pipe accessories under the different heating temperature.
金相显微组织分析表明，不同磁场退火处理后试样晶粒平均大小变化不大，而晶粒间不均匀程度增加。
Optical microstructure pictures show that the magnetic field have few effects on the mean grain sizes of samples through magnetic annealing, and the grain sizes vary drastically.
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