Fe-Al基金属间化合物的电渣重熔工艺

Electroslag Refining Processing of iron-aluminium Based Intermetallic Alloys

  • 摘要: 通过适当的非真空冶炼+电渣重熔工艺,制备了含Cr的Fe3Al基金属间化合物合金.实验发现,选择适当的热输入工艺参数,电渣重熔过程极大地降低了Fe3Al基金属间化合物合金中的S,O,H,P等杂质元素的含量,改善了析出相的大小与分布.铸锭具有良好的热加工性能,经锻造和中温热机械处理后,纵向室温延伸率分别超过8%和10%,屈服强度超过400MPa,断裂强度达到700 MPa,力学性能与同类真空冶炼大体积材料的性能相当.

     

    Abstract: A process route comprising air induction melting (AIM) and electroslag remelting (ESR) for Production of Fe3Al based containing Cr alloys has been developed. The effect of melting practice on the purity of elements,inclusions and properties is reported. Proper selection and control of Power input during electroslag remelting resulted in clean, sound,homogenous and defect-free ingots. The content of S,O, H,P in the samples were decreased, and the size and distribution of inclusion were changed. After hot forging and thermomechanical process, the longitudinal elongation at room temperature is over 8% and 10% for two kinds of materials, yield strength is over 400 MPa, and ultimate tensile Strength is about 700 MPa. It is more possible to melt Fe3Al based alloys by ESR.

     

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