CSB-2预合金粉质量分数和烧结温度对热压富铁基胎体力学性能的影响  

Effects of pre-alloyed CSB-2 powder addition and sintering temperature on physical property of hot-pressed iron-rich diamond bit matrix

作　　者：艾昆 李静仪 段隆臣[2] 贾永江 谭松成[2] 方小红[2] AI Kun;LI dingyi;DUAN Longchen;JIA Yongjiang;TAN Songcheng;FANG Xiaohong(Down-well Work Branch of North China Petroleum Engineering Limited Company,Sinopec,Zhengzhou 450000,China;Guilin Diamond Industry Technical Co.,Guilin 541199,Guangxi,China;Engineering Faculty,China University of Geosciences,Wuhan 430074,China)

机构地区：[1]中石化华北石油工程有限公司井下作业分公司,郑州450000 [2]中国地质大学工程学院,武汉430074 [3]桂林金刚石工业有限公司,广西桂林541199

出　　处：《金刚石与磨料磨具工程》2018年第4期45-49,共5页Diamond & Abrasives Engineering

基　　金：国家自然科学基金(项目编号:41672364;41602373);中石油科技创新基金(编号:2016D-5007-0307);中石化华北石油工程有限公司井下作业分公司项目(编号KH176095)

摘　　要：热压富铁基金刚石钻头具有成本低、钻速高的优点,已在钻探中广泛应用。对比相同的热压富铁基胎体配方,通过测试试样的致密度、显微硬度、抗弯强度和抗冲击韧性,研究CSB-2预合金粉质量分数和烧结温度对金刚石钻头胎体力学性能的影响。试验结果表明:添加CSB-2预合金粉的胎体性能均比单质混粉胎体性能好。随CSB-2质量分数的增加,胎体的致密度、显微硬度、抗弯强度和抗冲击韧性分别最大提高了7.68%、27.99%、94.43%和312.82%;同时,胎体粉末预合金化有利于降低胎体的热压烧结温度;为获得良好的应用效果,CSB-2质量分数应大于30%,且最佳烧结温度为940~980℃。With the advantages of low cost and high drilling speed,the hot-pressed iron-rich based diamond bit has been deeply studied and applied in recent years.Compared to the same formula of the hot-pressed iron-rich matrix,the effect of the pre-alloyed CSB-2 addition and sintering temperature on the physical properties of diamond bit matrix were studied by compactness,microhardness,flexural strength and impact toughness tests.Results indicated that matrix performance of the added CSB-2 powder was better than that of the elemental mixed powders.With the increase of mass fraction of CSB-2,the compactness,microhardness,flexural strength and impact toughness of the matrix were increased by 7.68%,27.99%,94.43%and 312.82%respectively.At the same time,the pre-alloying of matrix formula could reduce the hot-pressing temperature. To obtain a good application performance,the optimum addition of CSB-2 should be higher than 30% and the preferred sintering temperature should range from 940℃to 980℃.

关 键 词：预合金粉 烧结温度 金刚石钻头 富铁基胎体 

分 类 号：TG74[金属学及工艺—刀具与模具]