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一引言奥斯田体等温变态曲线,或简单的常按照其形状称为S曲线或C曲线。但是由于钢成份的不同,等温变态曲线形状变化很大。根据苏联科学家们研究的结果,得出了许多不同成份钢的等温变态曲线;特别是高合金钢,它的奥斯田处等温变态曲线,根本丝毫没有与S相似的地方,所以称为奥斯田体等温变态曲线较为合适。等温变态曲线是研究钢在恒温条件下,奥斯田体变态而得到的结果,对于钢热处理过程的分析可以得到很清楚的了解,是钢在热处理操作上的重要关键。所以在理论上,由此可见其重要性。但在实
I. INTRODUCTION Austempered field isothermal deformation, or simply according to its shape is called S curve or C curve. However, due to the different steel components, isothermal abnormal shape curve changes greatly. According to the results of Soviet scientists’ study, many isothermal deformation curves of many different steels have been obtained. Especially for high-alloy steels, the isothermal metamorphosis curves of the austenite fields are not similar to those of S at all. Therefore, Field isothermal metamorphosis curve is more appropriate. The isothermal metamorphosis curve is the result of studying the steel metamorphosis of Austen under constant temperature conditions. The analysis of the steel heat treatment process can be clearly understood, and it is the key of the steel in the heat treatment operation. So in theory, we can see its importance. But in fact