Experimental Study on Surface Quality in Micro-grinding of Superalloy K445

doi:10.12068/j.issn.1005-3026.2016.02.015

Abstract

Abstract: To explore the micro-grinding surface quality of nickel-based superalloy， orthogonal experiments of three factors and five levels on nickel-based superalloy K445 were performed using a micro-grinding tool with ^#500 grains and 0.9mm diameter. The influencing factors on the surface roughness were clarified according to the range analysis: the feed rate was a dominant factor， followed by spindle speed and grinding depth. The optimized parameters combination was as follows: feed rate f_○m=20μm/s， the grinding depth a_○p=6μm and the feed speed v_○g=58kr/min， on which the surface roughness R_○a=462nm， being minimum. Then， how the factors such as spindle speed， feed speed， grinding depth and overhanging length affected grinding surface quality was analyzed through a single-factor experiment so as to provide important theoretical basis for fabricating micro nickel-based superalloy workpiece.

Key words: micro-grinding, nickel-based superalloy, grinding parameter, surface roughness;K445

CLC Number:

TH161

ZHOU Yun-guang， GONG Ya-dong， WEN Xue-long， ZHU Zong-xiao. Experimental Study on Surface Quality in Micro-grinding of Superalloy K445[J]. Journal of Northeastern University Natural Science, 2016, 37(2): 218-222.

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