【摘要】 通过综合分析等离子弧作用金属表面的传热过程,并结合等离子弧表面淬火硬化区域温度场特点和等离子弧热源分布规律,建立了等离子弧表面淬火过程中,根据现场可测量的实际硬化宽度计算实际硬化深度的工程计算方法,且工程计算结果与实验结果吻合较好。依据已建立的工程计算方法,讨论了热源移动速度和硬化宽度的变化对实际硬化深度的影响规律,结果表明硬化深度随热源移动速度的变化关系为指数关系,硬化深度与硬化宽度的关系为二次函数变化关系。更多还原

【Abstract】 By synthetically analyzing the heat transfer process of metal surface by the plasma arc, and combining the characteristics of temperature field in hardening area of plasma arc surface and the distribution law of plasma arc heat source, the engineering calculation method for calculating the actual hardening depth according to the field measured actual hardening width during the plasma arc surface quenching process is established in this paper. The engineering calculation results are in good agreement with the experimental results. Based on the established engineering calculation method, influence of the change of heat source moving velocity and hardening width on the actual hardening depth is discussed. The results show that the relationship between hardening depth and heat source moving velocity is exponential; and the relationship between hardening depth and hardening width is quadratic function.更多还原