基于内部失效机理预测评估渗碳Cr-Ni齿轮钢的超高周疲劳强度

邓海龙, 刘兵, 郭扬, 康贺铭, 李明凯, 李永平

Prediction and Evaluation of Very-high Cycle Fatigue Strength of Carburized Cr-Ni Gear Steel Based on Interior Failure Mechanism

DENG Hailong, LIU Bing, GUO Yang, KANG Heming, LI Mingkai, LI Yongping

表2 GPD函数下对最大夹杂尺寸时疲劳强度的评估

Table 2 Estimation of fatigue strength at the maximum inclusion size under GPD function

Stress ratio Experimental strength/MPa Prediction strength (Model I)/MPa Error Prediction strength (Model II)/MPa Error R = 0 500 458.54 0.08 501.66 0.00 R = 0 525 475.27 0.09 512.76 0.02 R = 0 550 484.62 0.12 522.97 0.05 R = 0 550 482.06 0.12 526.90 0.04 R = 0 575 525.70 0.09 537.19 0.07 R = 0 600 502.77 0.16 553.93 0.08 R = 0 575 507.94 0.12 565.13 0.02 R = 0 625 542.83 0.13 571.08 0.09 R = 0.3 455 400.79 0.12 428.82 0.06 R = 0.3 437.5 396.79 0.09 412.52 0.06