Research on grinding temperature of particle-reinforced titanium matrix composites in creep-feed deep grinding
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摘要: 颗粒增强钛基复合材料(PTMCs)是具有高强度、高硬度和良好耐热性的新型金属基复合材料,在航空航天领域具有广阔应用前景。针对PTMCs材料极易发生的磨削烧伤问题,开展PTMCs材料的缓进深切磨削研究,对磨削过程中磨削温度和工件表面形貌的变化规律进行了分析。利用有限元温度仿真的方法,研究缓进深切磨削PTMCs传入工件的热量比例。结果显示:缓进深切磨削PTMCs过程中,磨削深度大于0.6 mm时容易发生烧伤;当工件材料表面发生严重烧伤时会产生裂纹;随着磨削深度增大,加工表面形貌逐渐变差。
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关键词:
- 缓进深切磨削 /
- 颗粒增强钛基复合材料 /
- 磨削温度 /
- 表面形貌
Abstract: Particle-reinforced titanium matrix composites(PTMCs)have high specific strength,high hardness and high temperature durability,which shows great application potentials as an important structural material in aviation and aerospace industries.Creep-feed deep grinding experiments are carried out on particle-reinforced titanium matrix composite to study the grinding performance in terms of grinding temperature and surface.The heat distribution proportion in the workpiece is discussed using finite element method.The results show that grinding burn is likely to occur when the depth of cutting reaches 0.6 mm,and that grinding induced crack could be presented by a severe grinding burn.Moreover,the surface topography becomes worse with increasing depth of cutting.
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