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为了给液固相复合界面控制提供理论支持,研究了在电磁离心铸造复合轧辊中电磁场对液固相双金属复合界面的影响。采用离心铸造法制备Al-Mg/Al-Si双金属复合管,在液固相复合过程中施加电磁场,并利用扫描式电子显微镜、X射线衍射、电子探针微区分析的方法分析复合界面。结果表明:与未施加磁场时相比,施加磁场后界面区域内的物相组成没有发生变化,但是界面内新析出的初生Mg2Si相尺寸显著减小,边角钝化,并且在径向上共晶Mg2Si相与初生Mg2Si相的分布更加趋于均匀。
In order to provide theoretical support for liquid-solid interface control, the effect of electromagnetic field on liquid-solid phase bimetallic composite interface in electromagnetic centrifugal casting composite roll was studied. The Al-Mg / Al-Si bimetallic composite tube was prepared by centrifugal casting method, and the electromagnetic field was applied during liquid-solid phase composite process. The composite interface was analyzed by scanning electron microscopy, X-ray diffraction and electron probe microanalysis. The results show that there is no change in the phase composition in the interfacial region when a magnetic field is applied, but the size of the newly precipitated Mg2Si phase in the interface is significantly reduced, the corner is passivated and the radial eutectic The distribution of Mg2Si phase and primary Mg2Si phase tends to be more uniform.