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通过对不同变形温度、不同淬火温度下的3 Cr 2 W 8 V钢高温塑性和高温疲劳裂纹扩展速率的研究,分析并回归出了n与ψ间的定量关系式。试验结果表明,高温脆性的出现加速了疲劳裂纹的扩展。
Through the research on the high temperature plasticity and high temperature fatigue crack growth rate of 3 Cr 2 W 8 V steel under different deformation temperature and different quenching temperature, the quantitative relation between n and ψ was analyzed and returned. The experimental results show that the appearance of high temperature brittleness accelerates the fatigue crack growth.