铸铁干式加工过程中钎焊金刚石圆锯片磨损机理

中国有色金属学报, 2016, 26(10): 2166-2173.

铸铁干式加工过程中钎焊金刚石圆锯片磨损机理

1.南京航空航天大学机电学院江苏省精密与微细制造技术重点实验室,南京,210016

2.南京航空航天大学机电学院江苏省精密与微细制造技术重点实验室,南京,210016

3.南京航空航天大学机电学院江苏省精密与微细制造技术重点实验室,南京,210016

4.南京航空航天大学机电学院江苏省精密与微细制造技术重点实验室,南京,210016

基金项目: 江苏省产学研前瞻性联合研究项目(BY2014003-02,BY2014003-18,BY2014003-11,BY2013003-14,BY2013003-04,BY2013003-15)Projects(BY2014003-02,BY2014003-18,BY2014003-11,BY2013003-14,BY2013003-04 and BY2013003-15) supported by the Industry-University-Research Cooperation Research Project of Jiangsu Province,China

关键词：金刚石圆锯片 , 铸铁管 , 真空钎焊 , 磨损机理 , 干式加工

Wear mechanism of brazed diamond saws during dry-cutting cast iron

Keywords： diamond saws , cast iron pipe , vacuum brazing , wear mechanism , dry-cutting

采用Ni-Cr合金活性钎料,在高真空炉中实现金刚石与钢基体牢固的钎焊连接.借助扫描电镜、能谱分析仪和X射线衍射仪阐述真空钎焊金刚石的钎焊机理和界面特征,分析钎焊金刚石圆锯片在干式加工铸铁过程中磨粒的磨损特性.结果表明:在铸铁管加工方面,钎焊金刚石圆锯片表现出优越的高效切割性能,磨粒磨损主要以破碎为主,磨削高温引起切屑粘附在破碎磨粒表面;揭示在铸铁干式加工过程中金刚石磨粒表面出现轻微的石墨化磨损等现象;实验表明磨粒的强度依然能满足加工要求.研制出适用铸铁材料高效加工用的高锋利度、高强度、安全的钎焊金刚石切割片.

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