砷、锡、锑对30CrMnSiA钢回火脆性的影响

Effect of As,Sn and Sb on Temper Brittleness of 30CrMnSiA Steel

研究了３０ＣｒＭｎＳｉＡ钢中复合加入不同量的砷、锡、锑对低温回火脆性及高温回火脆性的影响。证实该钢的低温回火脆性是马氏体板条间碳化物析出产生的准解理断裂所致，有害元素的存在会加剧这种脆性的发展。高温回火脆性是有害元素偏聚到晶界，助长沿晶断裂所致。这些元素在钢中的含量必须加以限制。

The effect of As,Sn and Sb on tempor brittieness of 30 CrMnSiA steel is studied, It showeS that the temper martensite embrittlement is correlated with interlath carbides,which initiate quasi-cleavage fracture across the martensite laths,and the residual deleterlous eleni1ents may en han ced the embrittlement.The tempor brittleners is attributed to the segre8ation of impurity elemen ts to the prior austenite grain boundarices,which causes intergranular fracture,so the conten t of these elements in steel must be limited.