基于二维线性断裂力学理论，提出了一种表面淬火齿轮的弯曲疲劳寿命预测方法，并开发了相应的计算程序。
A method for predicting the bending fatigue life of a surface quenched gear is proposed based on two-dimensional linear fracture mechanics and a computer program is developed.
结果表明材料选择错误、淬火温度不当，以及中频淬火区域过小是导致传动轴断裂的原因。
The results indicate that the mistake choice of material, unreasonable quench temperature and too small region of MF quenching are the cause of transmission shaft fracture.
结果表明，激光淬火处理基体可以提高镀铬层的断裂韧性。
The results show that the fracture toughness of Cr-coatings is improved by laser quenching substrate.
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