提出了等值线的新概念，论述了等值线在确定温热塑性加工规范方面的意义并进一步明确了研究应用的方向。
The importance of isopleth in determination of medium-temperature plastic working standard is discussed and the application trends of this investigation is further clarified.
含氮不锈钢的高温热塑性主要受热加工温度、钢中硫含量、氮含量等因素影响。
The hot ductility is influenced by hot worked temperature, sulfur content, nitrogen content and so on.
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