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研究了超高强度钢 30 Cr Mn Si Ni2 A的微观结构尺寸对其疲劳性能的影响 .试验结果表明 :在淬火 +低温回火状态下 ,这种钢的旋转弯曲疲劳极限σ- 1随其微观结构尺寸(原奥氏体晶粒或马氏体束径尺寸 )的减小而提高 ,且有关系式σ- 1=σ0 +kd- 1/ 2 .这样 ,就可以通过测量钢的微观结构尺寸来估算其疲劳性能
The effect of the microstructure of 30 Cr Mn Si Ni2 A ultra-high strength steel on its fatigue properties was investigated.The results show that the fatigue bending moment σ-1 of the steel under the condition of quenching and low temperature tempering is Structure size (the original austenite grain or martensite beam size) decreases and the increase, and the relationship σ-1 = σ0 + kd- 1 / 2. So, you can measure the microstructure of steel size To estimate its fatigue performance