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研究了在两相区加热与完全奥氏体区加热Q&P工艺下0.2C-1.51Si-1.84Mn钢中的残留奥氏体。结果表明:两相区加热得到的残留奥氏体量最高达13.39%,完全奥氏体化得到的残留奥氏体量最高达5.23%,配分时间为10 s时,两种加热方式的试样都完成碳配分;两相区加热得到的残留奥氏体以两种形态存在:处于马氏体板条间的薄膜状和位于原奥氏体晶界处的块状,而完全奥氏体化后得到的残留奥氏体以薄膜状存在于马氏体板条间;通过电子背散射衍射(EBSD)发现,残留奥氏体的分布与晶界多少有关。
The retained austenite in 0.2C-1.51Si-1.84Mn steel was investigated in the Q & P process with two-phase heating and complete austenite heating. The results show that the amount of retained austenite obtained by heating in the two-phase zone is up to 13.39%, the amount of retained austenite obtained after complete austenization is up to 5.23%, and the time for the partitioning is 10 s. All of the carbon partitioning is completed; the retained austenite obtained by the heating in two-phase region exists in two forms: a thin film between martensite laths and a lump at the original austenite grain boundaries, while the complete austenite Residual austenite obtained in thin film form between the martensite laths; by electron backscatter diffraction (EBSD) found that the distribution of retained austenite and grain boundaries.