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人工晶体学报 ›› 2017, Vol. 46 ›› Issue (12): 2503-2508.

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机械球磨合金化CuSn/TiH2钎料真空钎焊金刚石研究

伍俏平;罗舟;邓朝晖;康辉民;傅志强   

  1. 湖南科技大学智能制造研究院,湘潭 411201;难加工材料高效精密加工湖南省重点实验室,湘潭411201;难加工材料高效精密加工湖南省重点实验室,湘潭,411201;湖南科技大学智能制造研究院,湘潭,411201
  • 出版日期:2017-12-15 发布日期:2021-01-20
  • 基金资助:
    国家自然科学基金(51575179,51205126);湖南省自然科学基金(2017JJ3073,12JJB006);湖南省教育厅优秀青年项目(12B042)

Vacuum Brazing of Diamonds with Mechanical Milling Cu-Sn/TiH2 Alloy Powder

WU Qiao-ping;LUO Zhou;DENG Zhao-hui;KANG Hui-min;FU Zhi-qiang   

  • Online:2017-12-15 Published:2021-01-20

摘要: 利用机械球磨法将Cu-Sn粉末和TiH2粉末进行合金化处理制备出了粒径细小、元素分布均匀的铜基钎料,并开展了其与金刚石的真空钎焊实验.实验结果表明:当钎焊温度为920℃,钎焊时间为12 min时,金刚石表面生成了一层连续、致密的TiC层,有效实现了金刚石的高强度把持;钎料层的相对密度可达到97.6;,组织致密,仅存在少许的微细孔洞;金刚石的热损伤很小,在切削过程中主要经历了小块破碎、大块破碎、磨平等正常磨损形态,很少出现整颗磨粒过早脱落的情况,金刚石利用率高.

关键词: 机械球磨;真空钎焊;金刚石;钎焊性能

Abstract: Cu-Sn/TiH2 alloy powders were prepared by using mechanical ball milling method , the prepared powders have the characteristics of small particle size and uniform distribution of elements .The vacuum brazing experiment of Cu-Sn/TiH2 alloy powders and diamonds was further carried out .The experimental results indicate that the diamonds surface formed a continuous and dense TiC layer when the brazing temperature is 920 ℃ and the brazing time is 12 min, and the formed TiC layer can help achieve high bonding strength between brazing alloy and diamonds .The relative density of the brazing layer reach 97 .6;, there is only a little tiny spherical pores .The thermal damage of brazed diamonds is very small , the diamonds mainly occurr micro-fracture, fracture and rubdown in cutting process , and there is few diamonds pull-out during the cutting processing .

Key words: Cu-Sn/TiH2 alloy powders were prepared by using mechanical ball milling method , the prepared powders have the characteristics of small particle size and uniform distribution of elements .The vacuum brazing experiment of Cu-Sn/TiH2 alloy powders and diamonds was further carried out .The experimental results indicate that the diamonds surface formed a continuous and dense TiC layer when the brazing temperature is 920 ℃ and the brazing time is 12 min, and the formed TiC layer can help achieve high bonding strength between brazing alloy and diamonds .The relative density of the brazing layer reach 97 .6;, there is only a little tiny spherical pores .The thermal damage of brazed diamonds is very small , the diamonds mainly occurr micro-fracture, fracture and rubdown in cutting process , and there is few diamonds pull-out during the cutting processing .

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