作　　者： ;

机构地区： 广东工业大学机电工程学院

出　　处： 《超硬材料工程》 2019年第5期1-6,共6页

摘　　要： 文章探索了一种基于铝热反应的新型金属结合剂金刚石工具的制备方法,分析了铝热反应制备结合剂过程的反应合成机理,研究了热压烧结温度对铝热反应结合剂的相组成、微观结构、力学性能的影响。制备了铝热反应结合剂金刚石磨具,并测试了干、湿磨两种条件下磨削建筑陶瓷砖的加工性能。研究表明,Fe2O3-Al复合粉体在1028.8℃开始发生铝热反应,反应产物主要为Fe、Fe3Al相以及少量Al2O3及FeAl2O4(铁铝尖晶石)相,随着热压烧结温度的升高,FeAl2O4含量有所增加,结合剂的硬度、致密度和抗弯强度都随之升高。初步测试显示铝热反应结合剂金刚石磨具可以对建筑陶瓷砖进行加工,但工具耐磨性还存在不足。 Auminothermic reaction was proposed to prepare a metal bond diamond tool in the study.The mechanism of the aluminothermic reaction of this bond in hot-press sintering process was investigated.The effect of sintering temperature on phase composition,microstructure and mechanical properties of aluminothermic reaction bond was examined.The grinding performance of metal bond diamond tool on ceramic tile on dry and wet grinding conditions was also tested.The results showed that aluminothermal reaction in hot-press sintering occured at 1028.8℃.The reacted products included Fe、Fe3Al,Al2O3 and FeAl2O4.The content of FeAl2O4 was increased with the increase of the sintering temperature,which resulted in the rise of hardness,density and bending strength of the bond.With preliminary tests,The aluminothermic reaction metal bond diamond tool was qualified to grind the ceramic tiles but with a low wear resistance.

关 键 词： 铝热反应 金刚石工具 烧结温度 磨削 建筑陶瓷

领　　域： []