Influence of sulphur additions on impact properties of bainitic or martensitic steels

摘要: Abstract Effects of sulphur addition on the Charpy impact properties various continuously cooled bainitic steels with different prior austenite grain size, hardness, and content retained were investigated compared martensitic steels. The 1473 K austenitised improved increasing up to 0·1 wt-%, while deteriorated content. crack initiation energy increased increase because structure units surrounded by high angle boundaries refined manganese sulphide inclusions which caused expansion ductile fracture area. On other hand, energy, particularly propagation decreased nucleation sites voids in ductile...