硅酸盐学报2017，Vol.45Issue(6)：836-840,5.DOI:10.14062/j.issn.0454-5648.2017.06.13
含MgO-Gd2O3/Lu2O3烧结助剂的Si3N4陶瓷刀具的切削性能
Cutting Performance of Si3N4 Ceramic Cutting Tools with MgO-Gd2O3/Lu2O3Additives
摘要
Abstract
Si3N4 cutting tools with 2%MgO-8%Lu2O3 and 2%MgO-8%Gd2O3 additives (i.e., SN-L and SN-G) were preparedvia hot-pressing sintering, respectively. The cutting performance was investigated using HT250 cast iron as a work piece. The results show that SN-G has a better cutting performance with a higher stability during cutting process and a longer tool life, and the effective cutting length of SN-G is 2600m that is twice greater than that of SN-L. The morphology of the worn flank face of SN-L and SN-G has no significant difference, and the wear mechanisms mainly involve abrasive and adhesive wears. The size of matrix grains of SN-G is smaller, and the aspect ratio of reinforced grains is higher. The fracture strength and toughness of SN-G both are approximately 10% greater than those of SN-L. As a result, SN-G cutting tool has a higher wear resistance and a longer tool life.关键词
氧化镁-氧化钆/氧化镥/氮化硅/切削/刀具寿命/磨损机理Key words
magnesia-gadolinium oxide/lutetium oxide/silicon nitride/cutting/tool life/wear mechanism分类
矿业与冶金引用本文复制引用
郭伟明,谭大旺,王宏建,吴利翔,林华泰..含MgO-Gd2O3/Lu2O3烧结助剂的Si3N4陶瓷刀具的切削性能[J].硅酸盐学报,2017,45(6):836-840,5.基金项目
广东省引进创新科研团队计划( 2013G061) （ 2013G061）
国家自然科学基金(51402055)资助. （51402055）
