金刚石热损伤抑制技术研究现状  

Research status of thermal damage inhibition technology for diamond

作　　者：张建华 李昂 胡婷婷 杜全斌 崔冰[3] 张黎燕[2] 王蕾[2] 毛望军 ZHANG Jianhua;LI Ang;HU Tingting;DU Quanbin;CUI Bing;ZHANG Liyan;WANG Lei;MAO Wangjun(Zhengzhou Sino-Crystal Diamond Co.,Ltd.,Zhengzhou 450001,China;Henan Key Laboratory of Intelligent Manufacturing Equipment Integration for Superhard Materials,Henan Mechanical and Electrical Vocational College,Xinzheng 451191,Henan,China;Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials,Ministry of Educa-tion,Anhui University of Technology,Ma'anshan 243002,Anhui,China)

机构地区：[1]郑州华晶金刚石股份有限公司,郑州450001 [2]河南机电职业学院,河南省超硬材料智能制造装备集成重点实验室,河南新郑451191 [3]安徽工业大学,教育部先进金属材料绿色制造与表面技术重点实验室,安徽马鞍山243002

出　　处：《金刚石与磨料磨具工程》2024年第5期563-574,共12页Diamond & Abrasives Engineering

基　　金：河南省科技攻关计划(222102230111,222102220114,202102210072,232102220058)。

摘　　要：金刚石工具制备过程中的金刚石热损伤主要包括金刚石的石墨化、金刚石的破损开裂和金刚石的化学侵蚀等。针对金刚石热损伤问题,分别从金刚石表面镀覆、胎体材料性能调控和成型技术优化3个方面,介绍了目前金刚石热损伤的抑制技术,并对未来研究方向进行了展望,以期为高性能金刚石工具制备提供参考和指导。Significance:As the hardest material,diamond is widely used in various cutting and grinding tools.During the preparation process of diamond tools,thermal damage to diamonds is almost inevitable.The thermal damage to diamonds primarily includes graphitization,breakage,cracking,and chemical erosion.Graphitization of diamonds is a lattice transformation process of C atoms essentially,which requires sufficient energy to overcome the energy barrier.Consequently,during the preparation process of diamond tools,diamonds undergo varying degrees of graphitization due to high temperatures and catalyst elements.Breakage and cracking of diamonds primarily orginate from thermal mis-match between the diamond and the matrix metal,including its carbides,where carbides act as inducers of local residual stress,facilitating crack propagation.Chemical erosion of diamonds mainly refers to the process in which C atoms on the surface of diamonds react with active elements through diffusion during the sintering process,therefore deteriorat-ing the diamonds.However,due to the poor wettability of diamonds,it often necessitates the addition of active ele-ments such as Ti,Cr,V,etc.,to react with diamonds and improve the holding force.Current suppression technologies for diamond thermal damage can be roughly divided into surface coating of diamonds,adjustment of matrix material properties,and optimization of forming technology.Progress:Diamond surface coating utilizes the unbonded atoms present on the diamond surface,which can react with certain elements at sufficiently high temperatures to form carbides,thereby enhancing the wettability between the matrix metal and the diamonds.Depending on the type of coating,it can generally be classified into metal and non-metal coatings.Metal coatings not only fill and repair defects in diamonds but also improve the bonding strength between the metal and diamonds.Common coating metals include Ni,Ti,W,Cr,and alloys are also selected as coating materials.For non-metal coatings,elements such as B and Si are

关 键 词：金刚石 金刚石工具制备 热损伤 抑制技术 

分 类 号：TH16[机械工程—机械制造及自动化] TQ164[化学工程—高温制品工业] TG42[金属学及工艺—焊接] TG74[一般工业技术—材料科学与工程] TG14[金属学及工艺—金属材料]