对锌铝合金的钎焊性进行了分析,对ZnCl2 NH4Cl KF钎剂的去膜机理以及Cd Sn Zn钎料各组分的作用进行了阐述;分析了锌铝合金钎焊接头的力学性能、组织和成分;并对钎焊接头进行了无损检测。试验结果表明:用自制的Cd Sn Zn钎料和ZnCl2 NH4Cl...对锌铝合金的钎焊性进行了分析,对ZnCl2 NH4Cl KF钎剂的去膜机理以及Cd Sn Zn钎料各组分的作用进行了阐述;分析了锌铝合金钎焊接头的力学性能、组织和成分;并对钎焊接头进行了无损检测。试验结果表明:用自制的Cd Sn Zn钎料和ZnCl2 NH4Cl KF钎剂,经320℃加热和15min保温,对锌铝合金进行炉中钎焊,其钎焊接头抗拉强度为116.3MPa,抗剪强度为96MPa;接头中生成了新相,存在着(220)Mg2Cu6Al5//(010)Cd的相结构。展开更多
采用Zn-6Sn-5Bi钎料对镀Cu/Ni的烧结Nd Fe B永磁体和DP1180钢进行钎焊连接,对比分析了2种镀层条件下钎焊接头的微观组织和力学性能。结果表明,对于镀Cu的烧结Nd Fe B永磁体和DP1180钢的钎焊接头,Cu在钎料中扩散并与Zn、Fe反应生成脆性...采用Zn-6Sn-5Bi钎料对镀Cu/Ni的烧结Nd Fe B永磁体和DP1180钢进行钎焊连接,对比分析了2种镀层条件下钎焊接头的微观组织和力学性能。结果表明,对于镀Cu的烧结Nd Fe B永磁体和DP1180钢的钎焊接头,Cu在钎料中扩散并与Zn、Fe反应生成脆性金属间化合物,导致钎缝中出现裂纹和孔洞。与无镀层时的烧结Nd Fe B永磁体和DP1180钢的钎焊接头相比,接头的剪切强度由61.9 MPa降低至52.3 MPa;对于镀Ni的烧结Nd Fe B永磁体和DP1180钢的钎焊接头,Ni集中分布在Nd Fe B一侧的界面处,并且由于Sn和Bi的扩散形成了不同的扩散层,其剪切强度提高至78.1 MPa。展开更多
The solder joint strength of Pb/Sn soldering aluminum with electroless layer Sn/Bi and Cu was studied. The results show that the joint shear strength of electroless Sn/Bi on aluminum surface is lower than that of Cu. ...The solder joint strength of Pb/Sn soldering aluminum with electroless layer Sn/Bi and Cu was studied. The results show that the joint shear strength of electroless Sn/Bi on aluminum surface is lower than that of Cu. A Pb-riched region with porosity is formed in region of soldering fillet with electroless Sn/Bi. Both the electroless Sn/Bi layer and Pb-riched layer become thicker, which are the reasons why the shear strength of the solder joint with electroless Sn/Bi on aluminum surface is lower than that of electroless Cu, and the higher the thickness of the electroless Sn/Bi layer is, the lower the shear strength of solder joint is.展开更多
文摘对锌铝合金的钎焊性进行了分析,对ZnCl2 NH4Cl KF钎剂的去膜机理以及Cd Sn Zn钎料各组分的作用进行了阐述;分析了锌铝合金钎焊接头的力学性能、组织和成分;并对钎焊接头进行了无损检测。试验结果表明:用自制的Cd Sn Zn钎料和ZnCl2 NH4Cl KF钎剂,经320℃加热和15min保温,对锌铝合金进行炉中钎焊,其钎焊接头抗拉强度为116.3MPa,抗剪强度为96MPa;接头中生成了新相,存在着(220)Mg2Cu6Al5//(010)Cd的相结构。
基金Creation and Development Technology Project of Shenzhen,China(2021Szvup050)Shanghai Sailing Program(23YF1417400)2020 Renewal Program of Jilin University(419080520464)。
文摘采用Zn-6Sn-5Bi钎料对镀Cu/Ni的烧结Nd Fe B永磁体和DP1180钢进行钎焊连接,对比分析了2种镀层条件下钎焊接头的微观组织和力学性能。结果表明,对于镀Cu的烧结Nd Fe B永磁体和DP1180钢的钎焊接头,Cu在钎料中扩散并与Zn、Fe反应生成脆性金属间化合物,导致钎缝中出现裂纹和孔洞。与无镀层时的烧结Nd Fe B永磁体和DP1180钢的钎焊接头相比,接头的剪切强度由61.9 MPa降低至52.3 MPa;对于镀Ni的烧结Nd Fe B永磁体和DP1180钢的钎焊接头,Ni集中分布在Nd Fe B一侧的界面处,并且由于Sn和Bi的扩散形成了不同的扩散层,其剪切强度提高至78.1 MPa。
文摘The solder joint strength of Pb/Sn soldering aluminum with electroless layer Sn/Bi and Cu was studied. The results show that the joint shear strength of electroless Sn/Bi on aluminum surface is lower than that of Cu. A Pb-riched region with porosity is formed in region of soldering fillet with electroless Sn/Bi. Both the electroless Sn/Bi layer and Pb-riched layer become thicker, which are the reasons why the shear strength of the solder joint with electroless Sn/Bi on aluminum surface is lower than that of electroless Cu, and the higher the thickness of the electroless Sn/Bi layer is, the lower the shear strength of solder joint is.
