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Effects of Ti on the Brazability of Zn-22Al-xTi Filler Metals as Well as Properties of Cu/Al Brazing Joints
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Effects of Ti on the Brazability of Zn-22Al-xTi Filler Metals as Well as Properties of Cu/Al Brazing Joints
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Project of Scientist and Technician Serve the Enterprise, MOST, China (2009GJC20040)

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    摘要:

    設(shè)計(jì)并采用Zn-Al-Ti系列釬料對(duì)Cu和Al異種金屬實(shí)施了釬焊，并對(duì)Zn-22Al-xTi/Cu界面處的相組成和金屬間化合物形貌進(jìn)行了分析。結(jié)果表明：在Zn-22Al中添加0.01%至0.05%的Ti可以顯著細(xì)化釬料組織，而且Zn-22Al-0.03Ti在Cu基板上的鋪展面積比Zn-22Al高出60.4%，但Ti的添加會(huì)提高Zn-22Al釬料的熔點(diǎn)和熔化區(qū)間。另外，在釬料中添加微量的Ti可以優(yōu)化Cu/Al接頭中Cu側(cè)界面化合物的組織并減小其厚度。相比Zn-22Al釬料，Zn-22Al-0.03Ti釬焊所得Cu/Al接頭強(qiáng)度要高出13.4%，而且接頭斷裂位置由化合物層轉(zhuǎn)移至釬料內(nèi)部。X射線衍射結(jié)果顯示，釬焊過(guò)程中有CuAl2，Cu9Al4，CuZn 3種化合物產(chǎn)生于釬料與Cu基板界面處

    Abstract:

    Noval Zn-Al-Ti filler metals have been designed and used to braze Cu and Al dissimilar metals. The phase constitutions and morphologies of intermetallic compounds at the Zn-22Al-xTi/Cu interfaces were studied in this paper. The results indicate that, with Ti addition from 0.01 wt% to 0.05 wt%, the microstructure of the Zn-22Al alloy are refined significantly. The spreading area of Zn-22Al-0.03Ti on Cu substrates increases by 60.4% compared with that of ZA. However, the melting range and melting point of the Zn-22Al-xTi alloys also increase with the addition of Ti. In particular, the addition of trace Ti into the Zn-22Al filler metal can refine the microstructures and decrease the thickness of the intermetallic compounds layer produced in the Cu/Al brazing. The shear strength of Cu/Al joint brazed with Zn-22Al-0.03Ti is 13.4% higher than that of the Zn-22Al filler metal, and the fracture position changes from the interface layer to the matrix of the filler metals. The X-ray diffraction result indicates that the CuAl2, CuZn, and Cu9Al4 phases are produced at the filler metal/Cu substrate interface

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姬 峰,薛松柏,戴 瑋. Effects of Ti on the Brazability of Zn-22Al-xTi Filler Metals as Well as Properties of Cu/Al Brazing Joints[J].稀有金屬材料與工程,2013,42(12):2453~2457.[Ji Feng, Xue Songbai, Dai Wei. Effects of Ti on the Brazability of Zn-22Al-xTi Filler Metals as Well as Properties of Cu/Al Brazing Joints[J]. Rare Metal Materials and Engineering,2013,42(12):2453~2457.]
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  • 收稿日期:2012-12-25
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