钎涂金刚石在盾构刀具再制造中的应用

吴奇隆; 张雷; 孙华为; 孙志鹏; 贾连辉; 傅玉灿; 朱晨颖

doi:10.13394/j.cnki.jgszz.2021.5.0002

钎涂金刚石在盾构刀具再制造中的应用

doi: 10.13394/j.cnki.jgszz.2021.5.0002

1. 中机智能装备创新研究院(宁波)有限公司, 浙江宁波 315700;
2. 中铁工程装备集团有限公司, 郑州 450001;
3. 南京航空航天大学机电学院, 南京 210016

基金项目:

国家重点研发计划(2020YFF0218000)。

详细信息

作者简介:
吴奇隆,男,1993年生,硕士。主要研究方向：钎焊材料、钎涂工艺。E-mail: 1124784345@qq.com

通讯作者:
张雷,男,1982年生,硕士生导师、正高级工程师。主要研究方向：钎焊技术、钎涂工艺。E-mail: zhanglei86529029@sina.com

中图分类号: TQ164;TG454
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出版历程
- 修回日期: 2021-09-08
- 刊出日期: 2021-10-28

Application of brazed coating diamond in remanufacturing of shield cutters

1. China Innovation Academy of Intelligent Equipment (Ningbo) Co., Ltd., Ningbo 315700, Zhejiang, China;
2. China Railway Engineering Equipment Group Co., Ltd., Zhengzhou 450001, China;
3. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

摘要

摘要: 采用感应钎焊的方法，在堆焊层上制备金刚石耐磨复合涂层。对涂层进行磨粒磨损实验，并通过体视显微镜、扫描电镜、能谱分析和磨损质量损失表征钎涂界面的组织和磨痕特征。结果表明：金刚石复合涂层形成良好，金刚石弥散分布在复合涂层中，钎料与堆焊层之间形成了约5 μm的钎焊反应界面，并实现良好的冶金结合；在相同磨损实验条件下，堆焊层的质量损失为0.601 2 g，钎涂金刚石再制造试件的质量损失为0.087 1 g，约为堆焊层的14.5%。
- 钎涂 /
- 盾构刀具 /
- 金刚石 /
- 耐磨性
Abstract: The diamond wear-resistant composite coating was prepared on the surfacing layer by induction brazing.The abrasive wear experiment was carried out on the coating, and the microstructure and wear scar characteristics of the brazing coating interface were characterized by stereomicroscope, scanning electron microscope, energy spectrum analysis and wear mass loss.The results show that the diamond composite coating is well formed, the diamond is dispersed in the composite coating, the brazing reaction interface about 5 μm is formed between the solder and the surfacing layer, and a good metallurgical bond is achieved.Under the same wear test conditions, the mass loss of the surfacing layer is 0.601 2 g, and the mass loss of the brazed diamond remanufactured specimen is 0.087 1 g, which is about 14.5% of the mass loss of the surfacing layer.
- brazed coating /
- shield cutter /
- diamond /
- wear resistance

HTML全文

图 1 堆焊层 Surfacinglayer b 钎料 Solder c 金刚石 Diamond图1 钎涂用堆焊层、钎料和金刚石形貌Fig.1Morphologyofsurfacingalloy fillermetalanddiamondforbrazedcoating

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图 2 涂层表面Coatingsurface b A区放大图EnlargedviewofareaA图2 涂层表面扫描电镜形貌Fig.2SEMmorphologyofcoatingsurface

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图 3 钎焊涂层与堆焊层结合界面的横截面形貌

Figure 3. Cross sectional morphology of bonding interface between brazed coating and surfacing layer

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图 4 堆焊层与钎料的结合界面及线扫描图

Figure 4. Bonding interface and line scanning diagram of surfacing layer and solder

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图 5 堆焊层磨损前Beforewearofsurfacinglayer b 金刚石涂层磨损前Beforewearofdiamondcoating c 堆焊层磨损后Afterwearofsurfacinglayer d 金刚石涂层磨损后Afterwearofdiamondcoating图5 堆焊层与金刚石涂层磨损前后的3D形貌Fig.53Dmorphologyofsurfacinglayeranddiamondcoatingbeforeandafterwear

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图 6 表面磨损形貌Surfacewearmorphology b 磨损微区放大形貌Enlargedmorphologyofwearmicroregion图6 钎焊涂层磨损后的形貌及微区放大形貌Fig.6Morphologyandmicroareaenlargedmorphologyofbrazedcoatingafterwear

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图 7 金刚石涂层和堆焊层磨粒磨损后的质量损失对比

Figure 7. Comparison of the quality loss after abrasive wear between diamond coating and surfacing layer

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表 1 堆焊层化学成分

Table 1. Chemical compositions of surfacing layer

表 2 堆焊工艺参数

Table 2. Surfacing process parameters

表 3 NiCrBSi钎料化学成分

Table 3. Chemical compositions of NiCrBSi solder