【摘要】 基于Jeager的移动热源理论建立热模型,预测磨削表面温度。研究了淬硬轴承钢及一些低合金钢回火硬度与回火温度的关系。建立了回火硬度与回火温度关系的回火效应模型。磨削热导致回火引起淬硬钢磨削后表面硬度变化。通过合并磨削热模型和回火效应可以预测工件磨削后的表面硬度变化。进行了淬硬GCr15轴承钢的高速磨削试验,研究了工件速度和磨削深度对磨削后表面硬度的影响。试验值与预测值能够较好吻合。更多还原

【Abstract】 Thermal model based on Jeager’s heat resource theory was established to predict grinding surface temperature. The relations between the tempering hardness and the temperature for hardened bearing steel and low alloy steel were studied. The tempering behavior model of relationship between tempering hardness and temperature was set up. Tempering resulting from grinding heat caused surface hardness changes of hardened steels after grinding. Combining the tempering behavior with the grinding thermal model, the change in surface hardness due to grinding heat could be predicted. Experiments of high speed grinding for GCr15 bearing steel were done. The effects of work speed and grinding depth on surface hardness were researched. The predictive values accord with the experimental results.更多还原