| Ga和Ce复合添加对低银无镉钎料组织及性能的影响 |
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| 引用本文： | 马超力,薛松柏,王博,龙伟民,钟素娟. Ga和Ce复合添加对低银无镉钎料组织及性能的影响[J]. 稀有金属材料与工程, 2019, 48(1): 91-96 |
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| 作者姓名： | 马超力 薛松柏 王博 龙伟民 钟素娟 |
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| 作者单位： | 南京航空航天大学 材料科学与技术学院,南京航空航天大学 材料科学与技术学院,南京航空航天大学 材料科学与技术学院,郑州机械研究所,郑州机械研究所 |
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| 基金项目： | 国家自然科学基金项目（面上项目,重点项目,重大项目）;江苏高校优势学科建设 工程资助项目。 |
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| 摘 要： | 通过向Ag17CuZnSn钎料中复合添加微量的Ga元素和稀土元素Ce,研究了Ga和Ce元素的复合添加对低银无镉钎料组织及焊接性能的影响。采用火焰钎焊方法得到黄铜与不锈钢异种金属钎焊接头。试验表明,随着Ga和Ce元素的添加低银钎料的固液相线温度不断下降。当Ga和Ce含量分别为2%和0.15%时,钎料在母材表面的铺展面达到最大值。Ga和Ce元素的复合添加对低银钎料中的CuZn化合物相有明显的细化作用,黄铜与不锈钢钎焊接头的抗剪强度最大值为378.6 MPa。在钎焊过程中,钎缝与不锈钢母材之间发生了明显的元素扩散,Ga元素的扩散率大于其他元素。同时当低银钎料中的Ce元素含量大于0.3%时,钎料组织中出现了新生成的块状的稀土相。
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| 关 键 词： | 低银钎料 显微组织 稀土元素 抗剪强度 |
| 收稿时间： | 2017-07-16 |
| 修稿时间： | 2017-09-13 |
Effects of Ga and Ce on the Microstructure and Properties of Cadmium-free Silver Filler Metals |
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| Ma Chaoli,XueSongbai,Wang Bo,Long Weimin and Zhong Sujuan. Effects of Ga and Ce on the Microstructure and Properties of Cadmium-free Silver Filler Metals[J]. Rare Metal Materials and Engineering, 2019, 48(1): 91-96 |
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| Authors: | Ma Chaoli XueSongbai Wang Bo Long Weimin Zhong Sujuan |
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| Affiliation: | College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing,College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing,College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing,Zhengzhou Research Institute of Mechanical Engineering,Zhengzhou Research Institute of Mechanical Engineering |
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| Abstract: | Effects of Ga and Ce additions on the microstructures and mechanical properties of Ag17CuZnSn-xGa-yCe filler metals and brazed joint were investigated by microscopy method and tensile test. The results indicated that the solidus and liquidus temperatures of filler metals decreased with addition of Ga and Ce. And the wettability of filler metals on the brass and stainless steel improved when the content of Ga and Ce are 2 wt. % and 0.15 wt.%. The highest shear strength of brazed joint was 3% higher than the shear strength of the Ag17CuZnSn-2Ga. During brazing process, Ga has a higher diffusion coefficient into stainless steel than that of other elements. A novel Ce20(Ag, Cu)40Sn40 intermetallic phase was found in filler metal when the content of Ce is higher than 0.3 wt.%. |
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| Keywords: | low-silver brazing filler metal microstructure rare earth element shear strength |
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