对由熔铸法制备的CuNiMnFe/30CrMnSi双金属复合材料标准试棒与界面处具有阶梯状的变径试棒进行拉伸试验.测试了CuNiMnFe/30CrMnSi复合材料整体及界面的抗拉强度,表征了断口形貌和界面结合过渡区显微组织.研究结果表明,CuNiMnFe/30CrMnSi双金属复合材料拉伸断裂优先发生在CuNiMnFe合金区域,说明该复合材料中界面结合强度明显高于CuNiMnFe合金强度.CuNiMnFe/30CrMnSi复合材料界面结合强度较高主要是由于在CuNiMnFe合金和30CrMnSi合金熔铸时于界面结合处形成了一种结合过渡层,从而促进了CuNiMnFe合金和30CrMnSi合金的冶金结合.%CuNiMnFe/30CrMnSi bi-metal composite material were prepared by casting and infiltration method, followed by quenching and tempering treatment. The composite materials were machined into a standard bar and a step-like bar. The tensile strengths of CuNiMnFe/30CrMnSi composite material were determined by tensile test, and the fracture morphologies of two samples and the interface bonding transition zone of CuNiMnFe/30CrMnSi composite materials were analyzed by a scanning electron microscope. The results show that the tensile fracture prefers to occur inside the CuNiMnFe alloy, suggesting that the interface bonding strength between CuNiMnFe and 30CrMnSi alloy is larger than the tensile strength of CuNiMnFe alloy. This is due to the formation of a bonding transition layer, which can promote the metallurgical bond of CuNiMnFe and 30CrMnSi during the preparing process of the CuNiMnFe/30CrMnSi composite material.
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