摘要
采用46.4%Ag-18.0%Cu-35.6%Ni(质量分数)复合粉末中间层实现了SiO_2陶瓷和TC4钛合金的良好钎焊。使用扫描电镜、能谱分析和X射线衍射等方法对钎焊接头的界面组织和力学性能进行了研究。结果表明,SiO_2陶瓷和TC4钛合金的连接接头成形良好,SiO_2陶瓷/Ag-Cu/Ni/TC4钛合金钎焊接头的界面结构为:SiO_2/Ti_4O_7+TiSi_2/Ti_2Cu+Ti_2Ni/α-Ti+Ti2Cu+Ti_2Ni过共晶组织/α-Ti+Ti_2Cu+Ti_2 Ni过共析组织/α-Ti/TC4。当钎焊温度为970℃、保温时间为30 min时,使用Ag-Cu/Ni粉末中间层钎焊SiO_2陶瓷与TC4钛合金的接头达到最高抗剪强度38 MPa。
SiO_2 glass ceramic was successfully brazed to Ti-6Al-4V alloy by taking 46.4% Ag-18.0% Cu-35.6% Ni (wt.%) composite powder as interlayer. SEM, EDS and XRD analysis were used to study the joint interface and mechanical properties. The experimental result shows that SiO_2 glass ceramic is well joined to TC4 alloy, the interface structure of SiO_2/Ag-Cu/Ni / TC4 joint is SiO_2/Ti_4O_7 + TiSi_2/Ti_2Cu + Ti_2Ni/α-Ti + Ti_2Cu + Ti_2Ni hypereutectic structure/α-Ti + Ti_2Cu + Ti_2Ni hypereutectoid structure/α-Ti/TC4. The SiO_2/Ag-Cu/Ni/ TC4 joint brazed at 970℃ for 30 min has the maximum shear strength, which is up to 38 MPa.
出处
《焊接》
北大核心
2010年第4期33-37,共5页
Welding & Joining
