Super-Ni/NiCr叠层材料与Cr18-Ni8钢真空钎焊接头的组织性能
Microstructure and properties of vacuum brazed joint between super-Ni/NiCr laminated composite and Cr18-Ni8 steel
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摘要: 以Ni-Cr-Si-B系非晶钎料作为填充金属,采用真空钎焊技术得到成形良好的Super-Ni/NiCr叠层复合材料与Cr18-Ni8不锈钢接头.通过扫描电镜(SEM)、能谱分析仪(EDS)、显微硬度计对接头的组织性能进行分析.结果表明,钎料在叠层复合材料和Cr18-Ni8不锈钢表面润湿性良好,钎缝由γ-Ni固溶体和Ni3B组成.钎缝与Super-Ni/NiCr叠层复合材料之间发生溶解和扩散,界面不明显;钎缝与Cr18-Ni8不锈钢之间形成由细小硼化物组成的界面.钎焊接头的抗剪强度可达170 MPa,钎缝区呈现台阶状断裂,并带有撕裂特征,有少量韧窝.Abstract: Vacuum brazing of super-Ni/NiCr laminated composite to Cr18-Ni8 steel was performed using Ni-Cr-Si-B amorphous foil. Microstructure characteristic and shear strength of the brazed joints were investigated by scanning electron microscopy (SEM),energy-dispersive spectroscopy (EDS),microsclerometer and mechanical universal testing machine. The experimental results showed that the Ni-Cr-Si-B amorphous foil exhibited good wettability on super-Ni/NiCr laminated composite. The brazed region consisted of γ-Ni solid solution and Ni3B. Dissolution and diffusion occurred between the filler metal and super-Ni/NiCr laminated composite. An excellent bonding was obtained between them. An interface consisting of fine boride particles formed between the filler metal and Cr18-Ni8 stainless steel. The shear strength of the brazed joint reached 170MPa,and the fracture morphology displayed stepped fracture surface with some dimples and tearing feature in the brazed region.
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Keywords:
- laminated composite materials /
- vacuum brazing /
- microstructure /
- the shear strength
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期刊类型引用(3)
1. 袁明强，张春波，梁武，乌彦全，谢兴飞，周军，曲敬龙. GH4151高温合金的惯性摩擦焊接头组织及性能分析. 焊接学报. 2024(12): 63-71 . 
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2. 张传臣，张田仓，赵春玲. K447A+GH4169惯性摩擦焊接头组织与高温力学性能. 焊接学报. 2019(10): 137-141+167 . 本站查看
3. 张传臣，赵春玲，张田仓，李辉. K447A+GH4169惯性摩擦焊工艺试验研究. 材料导报. 2018(16): 2783-2786 . 百度学术
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