XM-19不锈钢锻造开裂的研究  

INVESTIGATION ON FORGING CRACKS IN XM-19 STAINLESS STEEL

作　　者：莫立华[1] 朱永新[1] 高杰[1] 周倩青[1] 齐瑞昌[1] 

机构地区：[1]中科院金属研究所,沈阳110015

出　　处：《理化检验（物理分册）》1999年第1期12-14,24,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：研究了XM-19不锈钢锻造开裂的原因.实验结果表明,钢锭加热温度过高,从而极大地降低了晶界塑性,晶界强度低于晶内强度,造成锻造开裂.锻造时,裂纹起源于晶界和表面初始缺陷处,并沿晶界扩展,向纵深发展,断口显示出典型的沿晶断裂.The cause of forging cracks in XM-19 stainless steel billet has been investigated. The results showed that because the furnace temperature was too high, the grain boundary plasticity of the billet decreased greatly and the strength of the grain boundary was lower than that of the grains. While the billet was forged, cracks originated from the grain boundary and the original defects on the surface, and extended along the grain boundary. The fracture showed typical intergranular fracture characteristics.

关 键 词：锻造开裂 过烧 沿晶断裂 不锈钢 

分 类 号：TG317[金属学及工艺—金属压力加工] TG316.192