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磁流变弹性体砂轮抛光镍基高温合金表面完整性研究
徐志强1,2,易理银1,张高峰1,2,吴衡1,王军1
1.湘潭大学机械工程学院,湘潭 411105;2.复杂轨迹加工工艺及装备教育工程研究中心,湘潭 411105
摘要:
为了改善磨削后镍基高温合金GH4169的表面完整性,本文采用磁流变弹性体砂轮对镍基高温合金GH4169进行抛光试验研究。首先,通过模压成型的方法制备了磁流变弹性体砂轮,并对其表面微观形貌及不同磁场强度下的硬度进行了表征。其次将制备出的磁流变弹性体砂轮用于对镍基高温合金GH4169的抛光工艺试验中,并讨论抛光工艺参数中磁场强度对镍基高温合金表面完整性的影响。试验结果表明:在一定的磁场强度范围内,零件抛光后的表面粗糙度和显微硬度随着磁场强度的增大而减小,同时增大磁场强度也有利于改善零件的表面形貌,减少砂轮的磨损量,降低零件磨削后的亚表面损伤层厚度。
关键词:  磁流变弹性体,砂轮,镍基高温合金,表面完整性,抛光
DOI:10.12044/j.issn.1007-2330.XXXX.XX.001
分类号:TG580.692
基金项目:国家自然科学基金资助项目(No.51605410,No. 91860133)
Research on Surface Integrity of Polishing Nickel-Based Superalloys with Magnetorheological Elastomer Grinding Wheel
XU Zhiqiang1,2, YI Liyin1, ZHANG Gaofeng1,2, WU Heng1, WANG Jun1
1.School of Mechanical Engineering, Xiangtan University, Xiangtan 411105;2.Engineering Research Center for Complex Trajectory Processing Technology and Equipment Education, Xiangtan 411105
Abstract:
To improve the surface integrity of nickel-based superalloy GH4169 after grinding, this paper uses a magnetorheological elastomer grinding wheel to perform a polishing test on the nickel-based superalloy GH4169. Firstly, a magnetorheological elastomer grinding wheel was prepared by compression molding, the surface micromorphology and hardness under different magnetic field strengths were characterized. Secondly, the prepared magnetorheological elastomer grinding wheel is used in the polishing process test of nickel-based superalloy GH4169, and the influence of magnetic field strength on the surface integrity of nickel-based superalloys in polishing process parameters is also discussed. The experiment results show that within a certain range of magnetic field strength, the surface roughness and microhardness of the part after polishing decrease with increasing magnetic field strength, and increasing the magnetic field strength is also beneficial to improve the surface morphology of the part reduce the amount of grinding wheel wear, reduce the thickness of the subsurface damage layer after the part is ground.
Key words:  Magnetorheological  elastomer, Grinding  wheel, Nickel-based  superalloy, Surface  integrity, Polishing