钎焊金刚石热损伤导致高比例磨粒非正常磨损失效是当前钎焊金刚石技术领域亟待解决的瓶颈问题。在深入分析产生这一问题的根本在于现有金刚石钎焊加热方式的基础上，提出将感应加热与激光加热巧妙结合，同时采用超声振动控制焊接过程，进而实现金刚石低损伤连接的新技术。揭示感应—激光复合加热温度场耦合规律与调控机制，突破其关键实施技术，实现低损伤的金刚石磨粒牢固连接。揭示超声波振动对钎料润湿爬升金刚石、界面连接以及焊后残余应力的影响规律。进行超声波辅助感应—激光复合加热焊接金刚石的综合工艺研究，全面揭示金刚石界面连接形成机理，评价热损伤抑制情况。最后通过典型磨盘钎焊制备及其加工性能评价进行综合实验验证。本项目的完成可为彻底解决金刚石钎焊存在的瓶颈问题探索一条可行的办法，具有明确的理论和实际意义。

High percentage of abnormal failure of grits, which caused by thermal damage during brazing, is a severe issue in the field of brazed diamond and is urgently to be solved. Based on the causes of why current heating methods of brazing diamond cannot meet the quire of low thermal damage brazing, an induction-laser coupled heating is presented to braze diamonds with the aim of reducing thermal damage brazing diamonds as much as possible by coupling the two thermal fields. The key implement technical problems of the coupled heating will be studied and solved. The coupling law and regulation mechanism of the induction-laser coupled heating thermal field will be revealed. After those, the brazing of diamond by the coupled heating will be investigated. To solve problems of the poor fluidity of melted brazing alloy and the residual stress of brazed grits, the ultrasonic vibration will be employed to assist the coupled heating brazing process. The comprehensive investigation of brazing diamond by ultrasonic assistant induction-laser coupled heating will be carried out, during which the bonding mechanism and the interface actions of diamond/brazing alloy will also be studied. Meanwhile, the thermal damage on diamond of this new heating method will be evaluated. On the basis of studies mentioned above, the verification experiments will be carried out, in which, typical grinding discs will fabricated and their grinding ability will be investigated. All the work of this research project will be the reliable scientific basis and could provide a feasible method for overcome the bottleneck in the brazing diamond field.