Stellite-6+VC混合粉末激光熔覆性能的研究

doi:10.3901/JME.2017.14.165

机械工程学报 ›› 2017, Vol. 53 ›› Issue (14): 165-170.doi: 10.3901/JME.2017.14.165

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Stellite-6+VC混合粉末激光熔覆性能的研究

徐国建¹, 杨文奇¹, 杭争翔¹, 刘祥宇², 迟海龙², 欧雪松²

1. 沈阳工业大学材料科学与工程学院沈阳 110870;
2. 南京中科煜宸激光技术有限公司南京 210038

收稿日期:2016-03-11 修回日期:2016-08-01 出版日期:2017-07-20 发布日期:2017-07-20
通讯作者: 杨文奇(通信作者),男,1991年出生,硕士研究生。主要从事激光加工设备及工艺的研究。E-mail:yangwenqi1991@163.com
作者简介:徐国建,男,1959年出生,博士,教授。主要从事激光加工工艺及成套加工设备的研究。E-mail:xuguojian1959@qq.com
基金资助:
辽宁省科技创新重大专项计划资助项目（201411004）。

Performance of Clad Layer Using Mixed Powder of Stellite 6 and VC

XU Guojian¹, YANG Wenqi¹, HANG Zhengxiang¹, LIU Xiangyu², CHI Hailong², OU Xuesong²

1. School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870;
2. Nanjing Zongke Raycham Laser Technology Co., Ltd., Nanjing 210038

Received:2016-03-11 Revised:2016-08-01 Online:2017-07-20 Published:2017-07-20

摘要/Abstract

摘要： 小功率脉冲激光下飞机叶片的强化是现在急需解决的问题，本试验通过采用光纤传输300 W Nd：YAG脉冲激光熔覆系统，在低碳钢（SM400B）上熔覆Co基合金（Stellite-6）和碳化钒（VC）混合粉末（VC的质量分数变化范围为0~100%），并对熔覆层的性能进行了研究，从而探究小功率脉冲激光下飞机叶片强化的工艺。试验结果表明，随着VC质量分数的增加，熔覆层组织由亚共晶组织转变为过共晶组织。当VC质量分数小于80%时，熔覆层硬度、裂纹敏感性及耐磨性能随VC增加而增加；当VC质量分数大于80%时，由于母材的稀释作用，熔覆层硬度、裂纹敏感性及耐磨性能随VC增加而降低。试验表明，使用Co基合金（Stellite-6）和碳化钒（VC）混合粉末可以形成耐磨性好、硬度高，裂纹敏感性低的熔覆层，对飞机叶片产生较好的强化效果。

关键词: 钴基合金, 激光熔覆, 裂纹敏感性, 脉冲Nd:YAG激光器, 耐磨性, 碳化钒

Abstract: The enhancement of the blade of aircraft with small power pulse laser is an urgent problem to be solved.Pulse 300W Nd:YAG laser facility is used for cladding in this experiment,and Stellite 6 alloy and VC mixed powder are cladded on mild steel (SM400B) plate. Shape of clad layer, microstructure and performance of clad layer are investigated by changing the weight fraction of VC in the range of 0 to 100% to research the process of strengthening the blade of aircraft with small power pulse laser. The experimental results demonstrate that with the increase of the content of VC, the microstructure of the cladding layer is changed from the eutectic structure to the eutectic structure. The hardness, crack sensitivity and wear resistance of the cladding layer are increased with the increase of VC when the content of VC is less than 80%, and when the weight of VC is more than 80%, the hardness, crack sensitivity and wear resistance of the cladding layer decrease with the increase of VC due to dilution effect of parent material.The results show that high quality cladding layer with good wear resistance,high hardness and low crack sensitivity can formed by using Co based alloy (Stellite-6) and vanadium carbide (VC) mixed powder,which can make a great effect in strengthening the blade of aircraft.

Key words: crack susceptibility, laser cladding, pulsed Nd:YAG laser, Stellite-6, vanadium carbide, wear resistance

中图分类号:

TG456

徐国建, 杨文奇, 杭争翔, 刘祥宇, 迟海龙, 欧雪松. Stellite-6+VC混合粉末激光熔覆性能的研究[J]. 机械工程学报, 2017, 53(14): 165-170.

XU Guojian, YANG Wenqi, HANG Zhengxiang, LIU Xiangyu, CHI Hailong, OU Xuesong. Performance of Clad Layer Using Mixed Powder of Stellite 6 and VC[J]. Journal of Mechanical Engineering, 2017, 53(14): 165-170.

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Stellite-6+VC混合粉末激光熔覆性能的研究

Performance of Clad Layer Using Mixed Powder of Stellite 6 and VC

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