中国机械工程

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CuSnNiCr真空钎焊金刚石界面微结构分析

卢金斌1;贺亚勋2;张旺玺2;穆云超2;丁文锋3;钟素娟4;马佳4   

  1. 1. 苏州科技大学,苏州,215009
    2. 中原工学院,郑州,450007
    3. 南京航空航天大学,南京,210016
    4. 郑州机械研究所,郑州,450001
  • 出版日期:2016-08-10 发布日期:2016-08-10
  • 基金资助:
    新型钎焊材料与技术国家重点实验室开放课题(SKLABFMT201003);河南省科技攻关项目(082102230027);苏州科技大学校基金资助项目(XKZ201501)

Interfacial Microstructure of Diamond Vacuum Brazing with CuSnNiCr

Lu Jinbin1;He Yaxun2;Zhang Wangxi2;Mu Yunchao2;Ding Wenfeng3;Zhong Sujuan4;Ma Jia4   

  1. 1. Suzhou University of Science and Technology, Suzhou,Jiangsu,215009
    2. Zhongyuan University of Technology, Zhengzhou,450007
    3. Nanjing University of Aeronautics and Astronautics,Nanjing,210016
    4. Zhengzhou Research Institute of Mechanical Engineering, Zhengzhou,450001
  • Online:2016-08-10 Published:2016-08-10
  • Supported by:

摘要: 为降低钎焊金刚石的热损伤和制造成本,采用CuSnNiCr单质金属粉作为钎料,对金刚石磨粒进行了钎焊实验。采用SEM、EDS及XRD对金刚石焊后界面微结构、钎料组织进行了分析。结果表明:适合钎焊金刚石的活性成分为Cu75Sn15Ni5Cr5,该钎料能与金刚石实现化学冶金结合,熔点适中,润湿性较好。金刚石焊后形貌完整,表面基本光滑,表面生成了连续片状(Cr,Fe)7C3。钎料凝固过程先结晶出αCu枝晶,经包晶转变和共析转变,形成了αCu枝晶、Cu5.6Sn和共析αCu,钎料的显微硬度大约为200~250HV0.2。

关键词: 真空钎焊, 金刚石, CuSnNiCr, 碳化物

Abstract: In order to reduce the heat damage of diamond and manufacturing cost, using CuSnNiCr metal powder as filler and the experiments of brazing diamond abrasive grain were carried out. SEM, EDS and XRD were used to analyze the microstructure of diamond and brazing filler. The results show that the active component of the brazing diamond is Cu75Sn15Ni5Cr5, the melting point of the brazing filler is suitable for brazing diamond, and it can realize the chemical metallurgical bonding with diamond. The morphology of diamond is complete, the surface is smooth, and the surface of the diamond is as (Cr,Fe)7C3. The brazing filler solidification process of crystallized αCu dendrite, peritectic transformation and eutectoid transformation, the formation of dendrite, Cu5.6Sn, αCu and eutectoid αCu, the microhardness of the brazing filler is about 200~250HV0.2.

Key words: vacuum brazing, diamond, CuSnNiCr, carbide

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