作　　者： ; ; ; ; ;

机构地区： 湖南大学

出　　处： 《金刚石与磨料磨具工程》 2003年第6期33-34,38,共3页

摘　　要： 为提高无机非金属结合剂砂轮的强度,本文采取以石英砂、长石、硼砂、锂云母等矿物为主要原料,CaF2、KNO3、Na2SO3、CeO2作为晶核剂,采用熔融、水淬和球磨等工艺制备了微晶玻璃粉体。以该粉体为结合剂,结合微晶玻璃和陶瓷砂轮的制备工艺进行了制作磨具的研究。试验结果表明:采用适当的原料配比和工艺,可控制微晶玻璃中的晶粒直径为纳米级,并且该微晶玻璃作为砂轮结合剂时,不但结合剂本身具有高的强度,且对磨料也具有较强的把持力。等量结合剂情况下,用该结合剂制作的磨具可比现用的一般高速砂轮结合剂磨具的抗拉强度提高40％左右。 Glass-ceramic powder was prepared by the process of melting with the quartz sand, feldspar, borax and lithium as main raw material and CaF2 , KNO3 , Na2SO3 , CeO2 as nucleation agent, then water quenching and ball milling. Performances of the grinding wheels bonded by the above glass-ceramic powder were studied. The results indicated that crystal size of glass-ceramic could be controlled to nanometer at proper conditions. Using this microcrystalline glass-ceramic as the bonding agent to make grinding wheels would improve both the strength of bonding agent itself and the holding strength to abrasive grains. The tensile strength of the grinding wheels was 40% higher than conventional high-speed grinding wheels of the same amount of bonding agent.

关 键 词： 砂轮 微晶玻璃 结合剂 强度

领　　域： [金属学及工艺]