论文部分内容阅读
采用金相显微镜、超景深三维显微系统、扫描电镜对双层卷焊钢管钎焊接头的组织结构进行了研究。结果表明:双层卷焊钢管钎焊接头的铜钢复合界面结合方式为冶金结合且界面结合良好;双层卷焊钢管钎焊接头由扩散区和中界区组成。扩散区组织是α固溶体和ε固溶体的混合物,即(α+ε)。中界区的基体组织是铁在铜中的过饱和固溶体Cu(ss.Fe)并且在基体上稀疏地分布着(α+ε)双相固溶体;基于对双层卷焊钢管钎焊接头组织结构的观察,分析认为其接头的形成是由铜层熔化阶段、液固相互扩散阶段、凝固阶段组成。
The microstructure and microstructure of double-layer welded steel pipe brazed joints were studied by metallographic microscope, depth of field 3D microscopy and scanning electron microscopy. The results show that the bonding interface of copper-steel composite interface of double-layer welded steel pipe brazed joints is metallurgical bonding and the interface is well bonded. The double-layer welded pipe brazed joints consist of diffusion zone and mid-zone. Diffusion zone tissue is a mixture of α and ε solid solutions, ie (α + ε). The matrix microstructure of the middle zone is supersaturated solid solution Cu (ss.Fe) of iron in copper and the (α + ε) duplex solid solution is sparsely distributed on the matrix. Based on the microstructures of double- Observation, analysis that the formation of the joint is formed by the melting of copper layer, liquid-solid phase mutual diffusion stage, the solidification stage.