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低熔合金粉末對藥芯銀釬料釬焊過程的影響
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鄭州機(jī)械研究所有限公司

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中原科技創(chuàng)新領(lǐng)軍人才(ZYQR20180030)；鄭州市重大科技創(chuàng)新專項(2019CXZX0065)


Effect of low-melt alloy powder on brazing process of flux-cored silver brazing filler metal
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State Key Laboratory of Advanced Brazing Filler Metals and Technology,Zhengzhou Research Institute of Mechanical Engineering. Zhengzhou 450001

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    摘要:

    為克服高錫含量的AgCuZnSn釬料因脆性大而難以加工成形的問題,借鑒藥芯焊絲的理念,設(shè)計了添加CuSn合金粉粉芯的復(fù)合藥芯銀釬料,研究了粉芯中添加30wt%~70wt%Cu60Sn40合金粉對藥芯銀釬料的潤濕性、紫銅/Q235鋼釬焊接頭組織、界面顯微硬度及抗拉強度的影響。結(jié)果表明,釬焊過程中芯部CuSn合金粉和外層BAg30CuZnSn原位反應(yīng)合成高錫含量的AgCuZnSn釬料,獲得了成分均勻,結(jié)合良好的接頭組織。隨著藥芯粉芯中合金粉含量的升高,復(fù)合藥芯銀釬料在紫銅板及Q235鋼板上的潤濕面積不斷增大,Cu/Q235鋼釬焊接頭顯微硬度不斷升高,抗拉強度呈現(xiàn)先升高后降低的趨勢。當(dāng)藥芯粉芯中CuSn合金粉的含量為30wt%時,Cu/Q235鋼釬焊接頭的抗拉強度取得最大值(198.91MPa),提高了23.4%。

    Abstract:

    To overcome AgCuZnSn filler metal with high tin content is difficult to form for its high brittleness, a composite flux-cored silver filler metal with CuSn alloy powder core was designed based on the concept of flux-cored wire. The effects of 30wt%~70wt%Cu60Sn40 alloy powder on the wettability, microstructure, interfacial microhardness and tensile strength of silver filler metal, copper/Q235 steel brazing joint were studied. The results show that AgCuZnSn filler metal with high tin content is in-situ synthesis by CuSn alloy powder in core and BAg30CuZnSn of outer layer during brazing process, and uniform composition with good joint structure was obtained. With the increase of the content of alloy powder in the core, the wetting area of composite flux-cored silver solder on copper plate and Q235 steel plate is promoted constantly, the microhardness of copper/Q235 steel brazing joint is rised continuously, and the tensile strength is increased first and then decreased. When the content of CuSn alloy powder in the powder core is 30wt%, the maximum tensile strength (198.91MPa) of Cu/Q235 steel brazing joint is obtained, which is enhanced by 23.4% compared with the core silver brazing filler metal without alloy powder added.

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王蒙,張冠星,鐘素娟,沈元勛,龍偉民,董宏偉,劉曉芳.低熔合金粉末對藥芯銀釬料釬焊過程的影響[J].稀有金屬材料與工程,2021,50(8):2859~2866.[Wang Meng, Zhang Guanxing, Zhong Sujuan, Shen Yuanxun, long Weimin, Dong Hongwei, Liu Xiaofang. Effect of low-melt alloy powder on brazing process of flux-cored silver brazing filler metal[J]. Rare Metal Materials and Engineering,2021,50(8):2859~2866.]
DOI：10.12442/j. issn.1002-185X.20200646

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  • 收稿日期:2020-08-28
  • 最后修改日期:2020-10-17
  • 錄用日期:2020-11-25
  • 在線發(fā)布日期: 2021-09-07
  • 出版日期: 2021-08-31