不锈钢表面电镀锡银钎料的润湿特性

doi:10.11896/j.issn.1005-023X.2018.08.011

《材料导报》期刊社

2018, Vol. 32

Issue (8): 1263-1266 https://doi.org/10.11896/j.issn.1005-023X.2018.08.011

材料研究

不锈钢表面电镀锡银钎料的润湿特性

王星星¹, 彭进¹, 崔大田¹, 孙国元¹, 何鹏²

1 华北水利水电大学机械学院,郑州 450045;
2 哈尔滨工业大学先进焊接与连接国家重点实验室, 哈尔滨 150001

Wetting Characteristics of Tin-electroplated Silver Brazing Alloys on the Surface of 304 Stainless Steel

WANG Xingxing¹, PENG Jin¹, CUI Datian¹, SUN Guoyuan¹, HE Peng²

1 School of Mechanical Engineering,North China University of Water Resources and Electric Power,Zhengzhou 450045;
2 State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Harbin 150001

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摘要为揭示不锈钢表面电镀锡银钎料的润湿特性,借助润湿试验炉、影像式烧结点试验仪、扫描电镜、X射线衍射仪、能谱分析仪对电镀锡银钎料的润湿行为、动态铺展过程、界面组织、物相组成及润湿界面化学元素分布进行了分析。研究表明,优先铺展的前驱膜是改善电镀锡银钎料润湿性的本质原因。润湿过程中出现的前驱膜效应,主要是试验中FB102钎剂中的硼酐引起的。电镀锡银钎料与不锈钢界面出现的Cu₄₁Sn₁₁相过渡层,垂直于润湿界面呈柱状向钎料内生长。随着Sn含量升高,电镀锡银钎料在不锈钢表面的润湿面积呈增大趋势;与同Sn含量(2.4%~7.2%,质量分数)的传统AgCuZnSn钎料相比,电镀锡银钎料在不锈钢表面的润湿面积提高了8.1%~12.5%。当Sn含量为7.2%时,电镀锡银钎料的润湿面积高达481 mm²。电镀锡银钎料与不锈钢母材的接合界面是扩散-化合物混合型形式。

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关键词: 304不锈钢电镀锡银钎料前驱膜效应润湿面积能谱分析

Abstract: Aiming at revealing the wetting characteristic of Sn-electroplated Ag brazing alloys on the surface of 304 stainless steel, wetting test furnace, imaging-type sintering point tester, scanning electron microscope (SEM), X-ray diffractometer (XRD), energy dispersive spectrometer (EDS) were applied to analyze the wetting behavior, dynamic spreading process, interfacial microstructure, phase composition and element distribution. And the chemical elements of the interface was analyzed by line scan. The results suggested that the improved wettability of the Sn-electroplated Ag brazing alloy on stainless steel surface is intrinsically caused by the prior spreading of the wetting precursor, which is mainly induced by the B₂O₃ in FB102 flux employed during wetting experiment. Cu₄₁Sn₁₁ compound phase, which appears at the interface of Sn-electroplated Ag brazing alloys and stainless steel, is perpendicular to the wetting interface and grow inward the brazing seam form a “column” shape. With the increase of Sn content, the wetting area of Sn-electroplated Ag brazing alloys exhibited an expanding trend on the surface of stainless steel. Compared with the traditional brazing filler metals, under the same Sn content, the wetting area of Sn-electroplated Ag brazing alloys increased about 8.1%—12.5%. When Sn content is 7.2 wt%, the wetting area of Sn-electroplated Ag brazing alloys reached the maximum value of about 481 mm². Our research also implied the diffusion-compound-type bonding form of the interface between Sn-electroplated Ag brazing alloys and 304 stainless steel.

Key words: 304 stainless steel Sn-electroplated Ag brazing alloys precursor effect wetting area energy spectrum analysis

出版日期: 2018-04-25 发布日期: 2018-05-11

ZTFLH:

TG454

基金资助: 国家自然科学基金(51705151);河南省自然科学基金(162300410191);河南省高等学校重点科研项目(17A430021);华北水利水电大学博士科研启动基金(201704001)

作者简介: 王星星:男,1984年生,博士,讲师,主要研究方向为新型银基钎料及其钎焊工艺开发 E-mail:paperwxx@126.com

引用本文:

王星星, 彭进, 崔大田, 孙国元, 何鹏. 不锈钢表面电镀锡银钎料的润湿特性[J]. 《材料导报》期刊社, 2018, 32(8): 1263-1266.
WANG Xingxing, PENG Jin, CUI Datian, SUN Guoyuan, HE Peng. Wetting Characteristics of Tin-electroplated Silver Brazing Alloys on the Surface of 304 Stainless Steel. Materials Reports, 2018, 32(8): 1263-1266.

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https://www.mater-rep.com/CN/10.11896/j.issn.1005-023X.2018.08.011 或 https://www.mater-rep.com/CN/Y2018/V32/I8/1263

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