Abstract: Effects of various dynamic strata aging pro-treatments on the static tensile strength, fatigue strength and creep rupture strength of an 18-8 type austenitic staialess steel at high temperature (300~600℃) were investigated. The results show that dynamic strain aging pre-treatment processes increase the high temperature strengths of the material, and the strength vales increase with increasing the prestrain temperature and prestrain. It is also found that the strengthening effect of dynamic strain aging is better than that of cold-working processes at the same prestrain.

Key words: 奥氏体不锈钢, 高温性能, 时效, 应变