抄録
Effects of chemical composition on season cracking, which occurs in metastable austenitic stainless steel after deep drawing, were studied. The main results obtained in this study are as follows.
1) The sensitivity to season cracking is not determined only by the volume fraction of strain-induced martensite. It is affected by chemical composition. The effects of chemical composition on hardening martensite and injuring the toughness of it are most related to the sensitivity to season cracking.
2) This relation is introduced by the behaviors of K/σ0.2 vs. σ0.2. which are measured in 60% cold rolled materials.
3) Carbon and phosphorus are very harmfull and nitrogen is harmless compared with carbon.
4) Addition of silicon and aluminum is of use in preventing season cracking.
