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时效硬化奥氏体型不锈钢 凡是使用W、Mo、V或Nb及Ti或Al,或者多元素时效强化的奥氐体型不锈纲都属于这一类型。其优点是不需要低温处理;其缺点为没有马氏体的相转变发生,强度不如上述的三种钢种。这类钢种在500℃以下的强度不如沉淀硬化不锈钢,但在600～700℃之间则其强度较优而有使用的价值。这类钢的室温强度及高温强度都比普通的不绣钢(奥氏体型的)要好得多,故选作涡轮
Aging-hardening austenitic stainless steel Any use of W, Mo, V or Nb and Ti or Al, or multi-element austenitic stainless steel age-class belong to this category. The advantage is that no low temperature treatment is required; the disadvantage is that no martensite phase transformation occurs and the strength is not as good as the above three steel grades. This type of steel below 500 ℃ in strength than precipitation hardening stainless steel, but at 600 ~ 700 ℃ between its strength and better value. This type of steel room temperature strength and high temperature strength than ordinary stainless steel (austenitic) is much better, it was selected as a turbine