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本文研究了１Ｃｒ１８Ｎｉ９Ｔｉ奥氏体不锈钢中出现的锯齿屈服现象的特征。试样经１３２７Ｋ固溶处理，其平均晶粒尺寸为０．０５ｍｍ。拉伸试验温度范围为室温～９７３Ｋ；应变速率分别为１×１０－４、５ × １０－４及２．５×１０－３Ｓ－１０。 试验结果表明：该钢的锯齿屈服现象发生在５２３～９２３Ｋ温区；按其特点不同，可截然分为５２３～６７３Ｋ及６７３～９２３Ｋ两个温区，其相应的出现锯齿屈服的激活能分别为３２．７Ｋｃａｌ／ｍｏｌｅ及４６．７Ｋｃａｌ／ｍｏｌｅ。可用“管扩散”机理来描述锯齿屈服过程；但两温区中与运动位错发生弹性交互作用的溶质原子气团不同：低温区可能为［Ｎｉ，Ｔｉ，Ｃ］复合气团，高温区则可能为［Ｃｒ，Ｃ］复合气团。
In this paper, the characteristics of serrated yield phenomena in 1Cr18Ni9Ti austenitic stainless steel were studied. The sample after 1327K solution treatment, the average grain size of 0.05mm. Tensile test temperature range of room temperature ~ 973K; strain rates were 1 × 10-4, 5 × 10-4 and 2.5 × 10-3S-10. The results show that the serrated yielding of this steel occurs in the temperature range of 523 ~ 923K. According to its characteristics, it can be divided into two temperature zones of 523 ~ 673K and 673 ~ 923K. The corresponding activation energy of sawtooth yield is 32.7 Kcal / mole and 46.7 Kcal / mole. The mechanism of serpentine buckling can be described by the mechanism of “tube diffusion”. However, the solute atomic air masses that interact elastically with motion dislocations in the two temperature zones are different: the low temperature zone may be [Ni, Ti, C] composite air masses and the high temperature zones may be [Cr, C] composite air mass.