在不同铣削速度(500~1 000 m·min^-1)和径向铣削深度(0.1~0.3 mm)下对GH4169镍基高温合金进行高速铣削加工,研究了铣削参数对切削力、切削温度、变质层和白层厚度以及表层硬度的影响。结果表明:随着铣削速度的增大,切削力降低,切削温度升高,铣削深度的增加会导致切削力和切削温度升高;在相同铣削深度下,当铣削速度由500 m·min^-1增大至1 000 m·min^-1时,变质层厚度增大约30 μm,白层厚度增大约5 μm,表层显微硬度增大约200 HV,硬化层深度增大约100 μm;在相同铣削速度下,铣削深度每增大0.1 mm,变质层厚度增大约30 μm,白层厚度增大约3 μm,表层硬度增大20 HV,硬化层深度增大约20 μm。

High-speed milling of GH4169 nickel-based superalloy was carried out at different milling speeds (500-1 000 m·min^-1) and radial milling depths (0.1-0.3 mm). The effects of milling parameters on cutting force, cutting temperature, metamorphic layer and white layer thickness and surface layer hardness were studied. The results show that with the increase of milling speed, the cutting force decreased and the cutting temperature increased. The increase of milling depth resulted in the increase of cutting force and cutting temperature. Under the same milling depth, when the milling speed increased from 500 m·min^-1 to 1 000 m·min^-1, the thickness of the metamorphic layer increased by about 30 μm, the thickness of the white layer increased by about 5 μm, the microhardness of the surface layer increased by about 200 HV, and the depth of the hardened layer increased by about 100 μm. Under the same milling speed, when the milling depth increased by 0.1 mm, the thickness of the metamorphic layer increased by about 30 μm, the thickness of the white layer increased by about 3 μm, the hardness of the surface layer increased by 20 HV, and the depth of the hardened layer increased by about 20 μm.