镍基钎料真空钎焊镀钨金刚石的研究

王树义; 肖冰; 肖皓中; 孟祥龙

doi:10.13394/j.cnki.jgszz.2022.0134

镍基钎料真空钎焊镀钨金刚石的研究

doi: 10.13394/j.cnki.jgszz.2022.0134

1.
南京航空航天大学机电学院, 南京 210016
2.
南京工业大学机械与动力工程学院, 南京 210016

基金项目: 江苏省产学研合作创新项目资助项目（BY2016003-15）

详细信息

作者简介:
王树义，男，1992年生，博士研究生。主要研究方向：钎焊金刚石工具制造技术。E-mail：1245676451@qq.com

通讯作者:
肖冰，男，1968年生，教授、博士生导师。主要研究方向：新型工具制造与研发。E-mail： meebxiao@nuaa.edu.cn

中图分类号: TQ164
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- 被引次数: 0
出版历程
- 收稿日期: 2022-08-23
- 修回日期: 2022-09-29
- 录用日期: 2022-10-10
- 刊出日期: 2023-04-20

Research on vacuum brazing of W-coated diamond with Ni-based filler alloy

1.
College of Mechanical & Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2.
School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 210016, China

摘要

摘要: 为减轻镍基钎料真空钎焊金刚石接头的热损伤与残余应力，采用镀钨金刚石磨粒代替常规金刚石磨粒并将其钎焊到1045钢基体上，对钎焊镀钨金刚石接头的连接性能、热损伤程度及残余应力进行深入研究与分析。结果表明：镍基钎料对镀钨金刚石磨粒展现出良好的润湿性，与钎焊常规金刚石接头相比，钎焊镀钨金刚石接头在结合界面处的裂纹数量及尺寸明显减小。常规金刚石表面生成了致密有序的板条状Cr₃C₂层，而镀钨金刚石表面则形成了向钎料中生长的无序粒状Cr₃C₂层。在镀层的隔离保护作用下，钎焊后的镀钨金刚石磨粒表面的石墨化程度更低，力学性能更优异。同时，镀钨金刚石表面更薄、形貌更合理的Cr₃C₂层有效地缓解了镀钨金刚石接头内部的残余应力，其最大残余压应力相较于常规金刚石的降低9.43%。
- 钎焊 /
- 镀钨金刚石 /
- 连接界面 /
- 热损伤 /
- 残余应力
Abstract: In order to alleviate the thermal damage and residual stresses of brazed diamond joints with Ni-based filler, W-coated diamond grains were used instead of conventional diamond grains and brazed onto 1045 steel substrates. The bonding interface properties, thermal damage and residual stresses of brazed W-coated diamond joints were investigated and studied. The results showed that the Ni-based filler exhibited good wettability to the W-coated diamond grains, and that the number and size of cracks at the bond interface of brazed W-coated diamond joints were significantly reduced compared with those of brazed conventional diamond joints. A dense and orderly Cr₃C₂ layer was generated on the surface of conventional diamond, while the disordered granular Cr₃C₂ growing into the filler alloy was formed on the surface of W-coated diamonds. With the isolation and protection of the coating, the brazed W-coated diamond grain surface has lower graphitization and better mechanical properties. At the same time, the thinner and more reasonable morphology of Cr₃C₂ layer on the surface of W-coated diamond effectively relieves the residual stress, and its maximum residual compressive stress is reduced by 9.43% compared with that of conventional diamond.
- brazing /
- W-coated diamond /
- bonding interfacial /
- thermal damage /
- residual stress

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图 1 镀钨金刚石形貌

Figure 1. Morphology of W-coated diamond

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图 2 镀钨金刚石XRD图谱

Figure 2. XRD pattern of W-coated diamond

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图 3 镀钨金刚石接头形貌及出露表面的形貌与拉曼光谱

Figure 3. Morphology of W-coated joint and exposed surface with Raman spectra

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图 4 钎焊的金刚石接头界面微观形貌

Figure 4. Interface microstructure of brazed diamond joint

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图 5 钎焊镀钨金刚石接头连接界面元素分布

Figure 5. Distribution of elements at the bonding interface of W-coated diamond joint

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图 6 常规金刚石表面生成物形貌

Figure 6. Reaction product morphology on the conventional uncoated diamond surface

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图 7 镀钨金刚石表面生成物形貌

Figure 7. Reaction product morphology on the W-coated diamond surface

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图 8 钎焊金刚石磨粒的XRD图谱

Figure 8. XRD patterns of brazed diamond grains

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图 9 钎焊金刚石表面石墨化

Figure 9. Graphitization of brazed diamond surface

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图 10 钎焊金刚石磨粒力学性能

Figure 10. Mechanical properties of brazed diamond grains

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图 11 钎焊金刚石接头残余应力

Figure 11. Residual stresses in brazed diamond joints

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表 1 镍基合金钎料成分

Table 1. Components of Ni-based filler

成分	质量分数ω₁ / %
镍 (Ni)	83
铬 (Cr)	7
铁 (Fe)	4
硅 (Si)	3
硼 (B)	3

下载: 导出CSV

表 2 化合物的EDS分析结果

Table 2. EDS analysis results of compounds

点	元素质量分数 ω₂ / %				可能相
点	镍 (Ni)	铬 (Cr)	碳 (C)	硅 (Si)	可能相
A	1.1	83.4	14.6	0.9	Cr₃C₂
B	1.3	85.2	12.8	0.7	Cr₃C₂

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