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采用离心浇铸,经剖切、热锻、热轧工艺制成16MnV/9Cr18MoV/16MnV 3层金属复合板。热轧后成品板金相组织观察发现,复合板一侧16MnV/9Cr18MoV界面清晰,另一侧9Cr18MoV/16MnV界面存在一模糊过渡带。扫描电镜成分分析显示,模糊界面过渡带上,Cr元素在16MnV区域有大量的混合,说明浇铸第3层16MnV时,较高熔点的16MnV熔化了较低熔点的9Cr18MoV,造成2种材料发生了强烈的混合,形成不对称的结构。这种不对称结构对力学性能及刀具的使用都会产生影响。
Centrifugal casting, cutting, hot forging, hot-rolled process 16MnV / 9Cr18MoV / 16MnV 3-layer metal composite plate. After hot-rolled sheet metallograph observation, 16MnV / 9Cr18MoV interface on one side of composite board is clear, and there is a fuzzy transition zone on the other side of 9Cr18MoV / 16MnV interface. Scanning electron microscopy (SEM) analysis shows that there is a large amount of Cr in the 16MnV region at the transitional interface. This shows that the higher melting point of 16MnV melts the lower melting point of 9Cr18MoV when the third layer of 16MnV is cast, resulting in strong formation of the two materials Of the mixture, the formation of asymmetric structure. This asymmetrical structure will have an impact on the mechanical properties and tool usage.