IC10定向凝固高温合金缓进给磨削表面完整性研究  

Surface Integrity of IClO Directionally Solidified Superalloy in Creep Feed Grinding

作　　者：杨忠学 张帅奇[2] 张强[2] YANG Zhongxue;ZHANG Shuaiqi;ZHANG Qiang(Key Laboratory of Contemporary Design and Integrated Manufacturing Technology, Ministry of Education, Northwestern Polytechnical University, Xi’an 710072, China;The Key Laboratory of Advanced High Temperature Structural Materials, Beijing Institute of Aeronautical Materials, Beijing 100095, China)

机构地区：[1]西北工业大学现代设计与集成制造教育部重点实验室,西安710072 [2]北京航空材料研究院先进高温结构材料国防科技重点实验室,北京100095

出　　处：《航空制造技术》2019年第6期62-70,共9页Aeronautical Manufacturing Technology

摘　　要：通过设计不同磨削工艺参数组合,研究了定向凝固高温合金IC10在缓进给磨削过程中表面完整性的变化,分析了IC10合金在缓进磨削过程中工艺参数对磨削表面粗糙度、显微硬度、三维形貌、显微组织的影响规律。研究表明:IC10合金在缓进给磨削过程中,当砂轮线速度V_s在15～20m/s之间变化,工件进给速度V_w不大于200mm/min,磨削深度a_p不超过0.5mm时,可以获得较好的表面质量。另外,IC10在缓进给磨削过程中会产生较严重的加工硬化现象,硬化程度最大可达26.9%,最大硬化层深度可以达到230μm。同时,IC10在缓进磨削过程中沿磨削深度方向上会产生表面白层和塑性变形层,其深度分别在0.24～3.2μm和0.48～3.8μm之间变化。Different combination of grinding process parameters are designed to research the surface integrity of IC10 directionally solidified superalloy in creep feed grinding. The effects of process parameters on the surface roughness,surface topography, microhardness and microstructure alteration of the subsurface are investigated in detail. The results show that a better surface quality can be obtained during creep feed grinding of IC10 superalloy under the conditions: the wheel speed ranges from 15 to 20 m/s, the workpiece speed is not more than 200 mm/min, and the grinding depth is not more than 0.5 mm. In addition, surface hardening phenomenon appears on the ground surface, the maximum hardening degree can reach 26.9% and the maximum depth of the hardened layer is 230μm. At the same time, the white layer and plastic deformation layer are produced in the subsurface, the depth of the white layer and deformation layer ranges from 0.24μm to3.2μm and 0.48μm to 3.8μm respectively.

关 键 词：高温合金 缓进磨削 表面完整性 加工硬化 表面白层 塑形变形 

分 类 号：TG580.6[金属学及工艺—金属切削加工及机床]