本文研究了微量Ca对60CrMnCuV钢回火马氏体室温冲击的影响,并用Auger能谱分析了沿晶断口表面的Ca及其它元素含量.结果表明,微量Ca明显提高60CrMnCuV钢回火马氏体的室温冲击韧性.Auger能谱分析表明,Ca在奥氏体晶界有明显的偏聚,促进Cr的偏聚,抑制硫的晶界偏聚.认为Ca抑制硫的晶界偏聚作用是韧化的重要原因.
An addition of 0.005 wt-% Ca to 60CrMnCuV steel may improve markedlythe impact toughness, and restricts the intergranular fracture. AES analysis shows that Casegregates markedly at the austenite grain boundaries, and restricts the segregation of S ataustenite grain boundaries. It is belived that an important reason to improve the toughnessmay attributes to the interactions of Ca and S segregations at the grain boundaries ofaustenite
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