Preparation and Optimization of High-Purity Silicon Carbide Magnetic Abrasives for the Magnetic Induction-Wire Sawing Process  

作　　者：Wei Zhang Tengwei Qiu Chunyan Yao 

机构地区：[1]Precision Mold Processing and Intelligent Manufacturing Research Center,Ningbo Polytechnic,Ningbo,315800,China [2]Key Laboratory of Special Purpose Equipment and Advanced Processing Technology,Ministry of Education,Zhejiang University of Technology,Hangzhou,310014,China

出　　处：《Fluid Dynamics & Materials Processing》2020年第4期709-721,共13页流体力学与材料加工（英文）

基　　金：supported by Talents Introduction Research Projects of NBPT[Grant Number RC201807];the National Nature Science Foundation of China(NSFC)[Grant Number 51475427].

摘　　要：In this study,magnetic abrasives were obtained by crushing and sieving sintered iron-silicon carbide(Fe-SiC)composites.Fe and SiC powders with different mesh numbers were pre-compacted using different pressures and then sintered at various temperatures and with different holding times.The dispersion uniformity of the SiC powder was improved through surface modification using polyethylene glycol(PEG)300.The resulting magnetic abrasives were characterized in terms of phase composition,density,relative permeability,and microstructure;this was followed by a comprehensive analysis to reveal the optimal processing parameters.The ideal combination of process parameters for preparing SiC magnetic-abrasive grains for the magnetic induction-wire sawing process was obtained,which are preparation load of 60 kN,a SiC mesh number of 1,500,a sintering temperature of 1100℃,and a holding time of 4 h.

关 键 词：Wire sawing magnetic abrasives SINTERING phase compositions 

分 类 号：TG1[金属学及工艺—金属学]