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通过铸造方式制备高铬铸铁-合金钢双金属复合组织,观察机械振动对双金属复合界面的影响。利用光学显微镜、扫描电子显微镜观察界面金相组织,以及扫描Fe、Cr元素在界面过渡区域分布情况;利用显微硬度计测量界面两侧硬度变化;通过拉伸和冲击试验测量界面结合力学性能。合适的振动频率能有效的改善铸造品质,提高元素扩散效率,高铬铸铁与合金钢实现良好的冶金结合。
The high-chromium cast iron-alloy steel bimetallic composite structure was prepared by casting, and the influence of mechanical vibration on the bimetallic composite interface was observed. The microstructure of the interface and the distribution of Fe and Cr elements in the interface transition region were observed by optical microscope and scanning electron microscope. The hardness changes on both sides of the interface were measured by microhardness tester. The interface mechanical properties were measured by tensile test and impact test. Appropriate vibration frequency can effectively improve the casting quality, improve elemental diffusion efficiency, and achieve good metallurgical bonding between high chromium cast iron and alloy steel.