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TC4合金與SiO2復(fù)合材料釬焊接頭界面結(jié)構(gòu)及性能
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國家自然科學(xué)基金資助（51174066）


Research on the Interfacial Structure and Mechanical Properties of TC4 - SiO2 Composite Brazed Joint
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    摘要:

    采用AgCu-4.5Ti釬料直接釬焊TC4鈦合金與SiO2復(fù)合材料，研究了接頭界面組織結(jié)構(gòu)及形成機(jī)理，分析了不同工藝參數(shù)下界面變化對接頭抗剪強(qiáng)度的影響。研究表明：接頭界面典型結(jié)構(gòu)為SiO2復(fù)合材料/TiSi2/Cu4Ti3+Cu3Ti3O/ Ag(s,s)+Cu(s,s)/TiCu/Ti2Cu/α，β-Ti/TC4；釬焊溫度的升高可促進(jìn)兩側(cè)母材界面反應(yīng)層厚度的增加，同時(shí)釬縫中部的AgCu共晶組織消失，化合物相增多；隨著接頭界面結(jié)構(gòu)的變化，接頭抗剪強(qiáng)度表現(xiàn)出先升高后降低的趨勢：當(dāng)釬焊溫度為850 ℃，保溫10 min時(shí)，接頭室溫最高抗剪強(qiáng)度達(dá)到7.8 MPa

    Abstract:

    The TC4 alloy was brazed to SiO2 composite using AgCu-4.5Ti filler alloy. The interfacial microstructure of joint was analysed and its formation mechanism was discussed. The influence of brazing temperature on the interfacial microstructure and the shear strength of joints was studied. The typical interfacial microstructure was SiO2 composite/TiSi2/Cu4Ti3+Cu3Ti3O/Ag(s, s)+Cu(s, s)/TiCu/Ti2Cu/α, β-Ti/TC4 alloy at brazing temperature 850 ℃, for 10 min. The increase of brazing temperature would increase the thickness of interfacial reaction layers near SiO2 composite and TC4 alloy, and the AgCu eutectic microstructure would disappear at 870 °C. The shear strength of joint also changes with the increase of temperature. The shear strength of the joints reaches a maximum of 7.8 MPa when the temperature is 850 °C and the holding time 10 min

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張俊杰,張麗霞,亓鈞雷,張大磊,馮吉才. TC4合金與SiO2復(fù)合材料釬焊接頭界面結(jié)構(gòu)及性能[J].稀有金屬材料與工程,2013,42(12):2598~2601.[Zhang Junjie, Zhang Lixia, Qi Junlei, Zhang Dalei, Feng Jicai. Research on the Interfacial Structure and Mechanical Properties of TC4 - SiO2 Composite Brazed Joint[J]. Rare Metal Materials and Engineering,2013,42(12):2598~2601.]
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  • 收稿日期:2012-12-19
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