湖南大学学报（自然科学版）2024，Vol.51Issue(4)：35-42,8.DOI:10.16339/j.cnki.hdxbzkb.2024168
高温合金磨削热损伤的形成机理及对表面完整性的影响
Generation Mechanisms of Thermal Damages in Superalloy Grinding and Its Effect on Surface Integrity
摘要
Abstract
Thermal damage defects are prone to occur during the grinding process of superalloys,which seriously reduces the fatigue life of parts.To address this engineering issue,this paper uses zirconium corundum grinding wheels and microcrystalline corundum grinding wheels to carry out creep-deep grinding experiments on superalloys.The effects of grinding process parameters on grinding temperature,grinding force,surface morphology,and surface roughness were studied.The formation mechanisms and effective suppression measures of thermal damage in superalloy grinding were revealed.The influence of grinding thermal damages on surface integrity was compared and analyzed.The results indicate that the instantaneous high temperature in the processing arc zone is the essential cause of the thermal damage of superalloy grinding.Microcrystalline corundum grinder can suppress grinding thermal damages productively due to its self-sharpening advantage.The surface of superalloy alloy grinding with thermal damages exhibits oxidation discoloration,fish scale-like coating texture,decreased hardness,and residual tensile stress.An effective means to realize the thermal damage-free grinding of superalloys is to reduce the generation of grinding heat and strengthen the heat transfer in the machining arc region.关键词
热效应/磨削加工/形成机理/表面完整性Key words
thermal effects/grinding process/generation mechanisms/surface integrity分类
机械制造引用本文复制引用
尹佑康,徐锦泱,明伟伟,安庆龙,陈明..高温合金磨削热损伤的形成机理及对表面完整性的影响[J].湖南大学学报（自然科学版）,2024,51(4):35-42,8.基金项目
航空发动机及燃气轮机重大专项基础研究资助项目(Y2019-Ⅶ-0018-0160),Aero-engine and Gas Turbine Major Special Basic Research Program(Y2019-Ⅶ-0018-0160) （Y2019-Ⅶ-0018-0160）
