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《Ordnance Material Science and Engineering》 2018-06
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Effect of high-speed milling parameters on surface integrity of ultra-high strength steel

YANG Zhenchao;XUE Yang;YUAN Qilong;XU Jin;LI Yan;School of Mechanical and Instrumenal Engineering,Xi′an University of Technology;  
In order to effectively control the surface integrity during the high-speed milling process of ultra-high strength steel,a high-speed milling experiment was performed on the ultra-high strength steel 16Co14Ni10Cr2Mo using coated carbide inserts.The 3D surface topography,3D surface roughness and surface residual stress were measured and analyzed by 3D confocal microscopy and X-ray diffraction.The effects of milling speed,feed per tooth and milling depth on the 3D surface topography,3D surface roughness and surface residual stress were studied.The results show that the 3D surface topography is a reflection of the amount of feed per tooth in the milling parameters,and there is a mapping relationship between the 3D surface topography and the 3D surface roughness.The 3D surface roughness decreases as the milling speed increases,but increases with the increase of the feed per tooth and the milling depth.The feed per tooth has the most significant influence on the 3D surface roughness.Within the range of the experimental parameters,the surface residual stresses are the tensile stress.As the milling speed increases,the surface residual stresses in the x-direction tend to increase,while the surface residual stress in the ydirection decreases.The surface residual stresses in the x-direction and y-direction increase with the increase of the feed per tooth.However,as the milling depth increases,the surface residual stresses in the x-direction and y-direction do not change obviously.
【Fund】: 国家自然科学基金(51775431;51475367);; 陕西省科技统筹创新工程计划(2014SZS10-Z01)
【CateGory Index】: TG54
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