Influence of Ni/Au Plating Process and Plating Thickness of Kovar Alloy on Laser Seal Welding Cracks

Cheng WANG; Huhao SUN; Cheng CHEN; Hengxu XUE

doi:10.7512/j.issn.1001-2303.2022.09.08

Welding Technology | Views : 0 下载量: 8 CSCD: 0

PDF
Export
Share
Collection
Album

Influence of Ni/Au Plating Process and Plating Thickness of Kovar Alloy on Laser Seal Welding Cracks
Vol. 52, Issue 9, Pages: 53-59(2022)
DOI： 10.7512/j.issn.1001-2303.2022.09.08

扫描看全文

王成，孙乎浩，陈澄，等.可伐合金表面Ni/Au镀覆方式和镀层厚度对激光封焊裂纹的影响［J］.电焊机，2022，52（9）：53-59.

WANG Cheng, SUN Huhao, CHEN Cheng, et al.Influence of Ni/Au Plating Process and Plating Thickness of Kovar Alloy on Laser Seal Welding Cracks[J].Electric Welding Machine, 2022, 52(9): 53-59.
王成，孙乎浩，陈澄，等.可伐合金表面Ni/Au镀覆方式和镀层厚度对激光封焊裂纹的影响［J］.电焊机，2022，52（9）：53-59. DOI： 10.7512/j.issn.1001-2303.2022.09.08.

WANG Cheng, SUN Huhao, CHEN Cheng, et al.Influence of Ni/Au Plating Process and Plating Thickness of Kovar Alloy on Laser Seal Welding Cracks[J].Electric Welding Machine, 2022, 52(9): 53-59. DOI： 10.7512/j.issn.1001-2303.2022.09.08.

摘要

可伐合金作为微波组件气密封装的金属外壳，表面通常镀覆Ni/Au作为防护层及钎焊层。采用LW600AE型激光器对表面镀覆不同Ni/Au层的可伐合金壳体及盖板进行激光封焊以获得外形美观、气密性合格的焊接接头，并分析可伐合金表面Ni/Au层镀覆工艺及镀层厚度对焊接接头裂纹的影响。结果表明，化学镀Ni层中的P元素及电镀Au层中的Au元素相对可伐合金中的其他元素熔点较低，极易气化且形成多种低熔点共晶，产生焊接裂纹。Au层厚度小于0.8 μm时，表面电镀Ni/电镀Au的可伐合金焊接接头未产生裂纹；随着Au层厚度的增加，焊缝中融入的Au元素增多，接头裂纹倾向增加，裂纹增大。电镀Ni层厚度的增加不会导致裂纹产生。电镀Ni层厚度8~11 μm，电镀Au层厚度0.1~0.3 μm时，可伐合金的微波组件外壳焊接接头质量较好，同时具有较好的防护及钎焊性能。

Abstract

The Kovar alloy with Ni/Au plating as a protective layer and brazing layer is used as the metal shell for the gas tight package of microwave assembly. The LW600AE laser is used to conduct the laser seal welding of the shell and cover plate of Kovar alloy with Ni/Au plating to obtain the welded joints with beautiful appearance and qualified air tightness, and the influence of the Ni/Au plating process and plating thickness on the cracks of welded joints are analyzed. The results show that the P element in electroless plating Ni finish and Au element in electroplating Au finish have lower melting points compared to other elements in Kovar alloy, and are very easy vaporized to form a variety of low melting point eutectic, which causes cracks. When the thickness of Au finish on the surface of Kovar alloy with electroplating Ni and Au is less than 0.8μm, no cracks occur. As the thickness of Au finish increases, a large amount of Au elements integrate into the weld, the tendency and length of cracks in welding joints improve. The increase of electroplating Ni finish does not lead to crack generation. When the electroplating Ni finish is 8~11 um, electroplating Au finish is 0.1~0.3um, the quality of welded joint of microwave assembly is good, and better protection and brazing properties are obtained.

关键词

可伐合金Ni/Au层激光封焊裂纹镀覆工艺

Keywords

Kovar alloyNi/Au finsheslaser seal weldingcracksplating process

references

Wang Z， Gao Z， Chu J， et al. Low temperature sealing process and properties of Kovar alloy to DM305 electronic glass［J］ . Metals， 2020， 10（7）： 941.

Yu L Q，Mo D F， Li X， et al. Microstructure and mechanical properties of electron beam welded joints of titanium alloy and Kovar alloy with copper or silver interlayer［J］. Materials Research Express， 2019， 6（11）： 116508.

田飞飞，高丽茵，葛培虎，等. 无氧铜镀层对激光封焊裂纹的影响［J］. 焊接学报，2017，38（4）：115-118.

TIAN Feifei， GAO Liyin， GE Peihu， et al. Effect of finishes of oxygen-free copper on laser welding cracks［J］. Transactions of The China Welding Institution， 2017， 38（4）： 115-118.

张强勇，赵先锐，刘桂香，等. 304不锈钢激光焊接工艺及数值模拟［J］. 电焊机，2021，51（4）：1-7.

ZHANG Qiangyong，ZHAO Xianrui，LIU Guixiang，et al. Laser welding process and numerical simulation of 304 stainless steel［J］. Electric Welding Machine， 2021，51（4）：1-7.

Chen H， Duan J，Yang Z，et al. Picosecond laser seal welding of glasses with a large gap［J］. Optics express， 2019，27（21）： 30297-30307.

徐洪涛，齐冠然，张楠楠，等. 化学镀镍316不锈钢激光焊接裂纹研究［J］. 电镀与涂饰，2021，40（5）：328-331.

XU Hongtao，QI Guanran，ZHANG Nannan. Study on cracking of electrolessly nickel-plated 316 stainless steel after laser welding［J］. Electroplating & Finishing， 2021，40（5）：328-331.

田勐，张勇，王丽萍，等. 不锈钢车体激光叠焊电磁超声检测技术应用研究［J］. 电焊机，2020，50（7）：96-103.

TIAN Meng，ZHANG Yong，WANG Liping， et al. Application research of laser overlay welding EMAT technology for stainless steel car body［J］. Electric Welding Machine， 2020，50（7）：96-103.

贾林，李红，栗卓新，等. 工艺参数对可伐合金/DM308钼组玻璃激光焊接接头结合性能的影响［J］. 焊接学报， 2018， 39（5）： 5-9.

JIA lin，LI Hong， LI Zhuoxin， et al. Effect of process parameters on laser welded joint bonding properties between Kovar alloy and DM308 glass［J］. Transactions of The China Welding Institution， 2018，39（5）：5-9.

雷党刚. 可伐合金外壳激光封焊的裂纹原因分析［J］. 电子工艺技术，2012，33（1）：45-49.

LEI Danggang. Analysis of Laser Welding Cracks on Kovar Alloy Box［J］. Electronics Process Technology， 2012，33（1）：45-49.

李娜，吴洪江. 常用封装材料的激光封焊工艺研究［J］. 半导体技术，2013，38（3）：216-221.

LI Na，WU Hongjiang. Research on Laser Seal Welding Technology of the Common Package Materials［J］. Semiconductor Technology， 2013，38（3）：216-221.

钱志宇，戴久宏，周亚，等. 激光工艺参数对可伐合金焊缝宽度和深度的影响［J］. 固体电子学研究与进展，2018，38（3）：223-229.

QIAN Zhiyu，DAI Jiuhong，ZHOU Ya，et al. Effect of Laser Welding Technological Parameters on Seam Width and Depth of Kovar Alloy［J］. Research & Progress of SSE， 2018，38（3）：223-229.

编辑部网址：http：//www.71dhj.comhttp://www.71dhj.com

Alert me when the article has been cited

提交

暂无数据