【摘要】 为解决定向凝固高温合金 DZ4在磨削加工中极易发生的磨削烧伤问题 ,采用先进的测试方法 ,对磨削过程中磨削力、磨削温度、工件表面形貌、表面层残余应力分布、表面层显微硬度、表面层金相组织等变化规律进行了分析研究 ,揭示出该种新型高温合金材料磨削烧伤机理 .旨在为寻求优化的高效、高精度磨削加工工艺提供理论及试验依据 .更多还原

【Abstract】 Directionally solidified nickel- based superalloy DZ4 is a kind of very importantstructural mater- ial.Grinding burn usually occurs in the grinding process.This paper studied the grinding mechanism of this new type superalloy on the base of systematical analysis of variable characteristics of the grinding force,grinding temperature,topography of ground surface,residual stress distribution and hardness dis- tribution of surface layer,as well as morphology of surface layer from a metallographical point.The re- sults are beneficial to grinding this new type superalloy with high efficiency and high precision.更多还原