稀土渗碳提高矿用牙轮钻头轴承寿命的应用研究  

Research on Prolongation of Service Life of Blast Hole Rock Bit Bearing by Adding Rare Earth Elements(RE) in Carburizing

作　　者：从善海[1] 黄拿灿[2] 胡社军[2] 

机构地区：[1]武汉科技大学材料与冶金学院,武汉430081 [2]广东工业大学材料与能源学院,广州510643

出　　处：《金属热处理》2001年第7期27-30,共4页Heat Treatment of Metals

摘　　要：研究了稀土元素对牙轮钻头渗碳过程的影响。试验结果表明 ,加入稀土元素使渗碳速度提高 2 0 %～ 30 % ,经渗碳 渗硼复合强化后 ,钻头的轴承寿命提高 2 4 8%～ 2 7.8% ,钻头的穿孔进尺增加了 15 3～ 190m ,提高率达 2 5 %～ 2 8%。Effects of rare earth elements (RE) on carburizing process of the blast hole rock bits were studied. The results showed that the carburizing rate is increased by 20% [similar to] 30% by adding RE. Industry test showed that service life of the bit bearing, subjected to carburizing-boriding combined strengthening, is increased by 24.8% [similar to] 27.8%, and the drilling length of the bits treated by RE is more 153 [similar to] 190 meters than that the untreated bits do, which is increased by 25% [similar to] 28%.

关 键 词：稀土 矿用牙轮钻头 轴承 使用寿命 

分 类 号：TD421.25[矿业工程—矿山机电] TG162.71[金属学及工艺—热处理]