以OCr21Ni11SiNRE为对象,研究了该种新型奥氏体耐热不锈钢高温持久性能,分析了持久强度σ与持久寿命τ及Larson-Miller参数P之间的关系,并以此为基础预测了该钢种在750～927℃,103h下的持久强度.结果表明,在本试验条件下,0Cr21Ni11SiNRE的蠕变机制大体相同,其持久强度σ与持久寿命τ的对数,L-M参数P呈线性关系,其中,σ与P之间关系可表示为σ=-20.66×10-3P+589.25(2.33×104
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