用内压扩散复合方法对铜钢双金属管进行了固相复合试验研究.用20钢管作外管,铜管作内管,对内外管分别经过表面处理后套装,再拉拔制成复合管坯,最后在内压力的作用下对复合管坯进行扩散退火,用弯曲试验检验了复合管界面的结合状况.用光学显微镜、扫描电镜及电子探针等分析方法对界面附近进行了组织观察和成分分析.结果表明,用内压扩散复合方法实现了铜钢界面的冶金结合. The composite experiment of internal pressure diffusion was used to study the solid-phase composite test of copper-steel bimetallic pipe. With 20 steel pipe as the outer pipe and copper pipe as the inner pipe, the inner and outer pipes were treated by surface treatment, The billet was diffusion-annealed under the action of internal pressure, and the bonding of the composite pipe was tested by the bending test.The microstructure of the composite pipe was observed by optical microscopy, scanning electron microscopy and electron probe analysis The results show that the metallurgical bonding of the interface of copper and steel is realized by the internal pressure diffusion method.