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Ga和Ce復(fù)合添加對低銀無鎘釬料組織及性能的影響
作者:
作者單位:

1.南京航空航天大學(xué) 材料科學(xué)與技術(shù)學(xué)院;2.鄭州機械研究所

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通訊作者:

中圖分類號:

TG425.2

基金項目:

國家自然科學(xué)基金項目（面上項目，重點項目，重大項目）；江蘇高校優(yōu)勢學(xué)科建設(shè) 工程資助項目。


Effects of Ga and Ce on the Microstructure and Properties of Cadmium-free Silver Filler Metals
Author:
Affiliation:

1.College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing;2.Zhengzhou Research Institute of Mechanical Engineering

Fund Project:

National Natural Science Foundation of China； Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD), P.R. China.

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    摘要:

    通過向Ag17CuZnSn釬料中復(fù)合添加微量的Ga元素和稀土元素Ce,研究了Ga和Ce元素的復(fù)合添加對低銀無鎘釬料組織及焊接性能的影響。采用火焰釬焊方法得到黃銅與不銹鋼異種金屬釬焊接頭。試驗表明,隨著Ga和Ce元素的添加低銀釬料的固液相線溫度不斷下降。當(dāng)Ga和Ce含量分別為2%和0.15%時,釬料在母材表面的鋪展面達(dá)到最大值。Ga和Ce元素的復(fù)合添加對低銀釬料中的CuZn化合物相有明顯的細(xì)化作用,黃銅與不銹鋼釬焊接頭的抗剪強度最大值為378.6 MPa。在釬焊過程中,釬縫與不銹鋼母材之間發(fā)生了明顯的元素擴(kuò)散,Ga元素的擴(kuò)散率大于其他元素。同時當(dāng)?shù)豌y釬料中的Ce元素含量大于0.3%時,釬料組織中出現(xiàn)了新生成的塊狀的稀土相。

    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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馬超力,薛松柏,王博,龍偉民,鐘素娟. Ga和Ce復(fù)合添加對低銀無鎘釬料組織及性能的影響[J].稀有金屬材料與工程,2019,48(1):91~96.[Ma Chaoli, XueSongbai, Wang Bo, Long Weimin, 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.]
DOI：10.12442/j. issn.1002-185X.20170619

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  • 收稿日期:2017-07-16
  • 最后修改日期:2017-09-13
  • 錄用日期:2017-10-12
  • 在線發(fā)布日期: 2019-02-18
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