Chapter 4 describes existing studies of fully austenitic weld metal.It mainly discusses the eutectic carbides among the austenitic stainless steels and its affection to hot cracks.

• 第4章介绍了单相奥氏体钢焊缝的研究现状，重点讨论了奥氏体钢中的一次共晶碳化物以及它对热裂纹的影响。