Electroslag Refining Processing of iron-aluminium Based Intermetallic Alloys
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摘要: 通過適當的非真空冶煉+電渣重熔工藝,制備了含Cr的Fe3Al基金屬間化合物合金.實驗發現,選擇適當的熱輸入工藝參數,電渣重熔過程極大地降低了Fe3Al基金屬間化合物合金中的S,O,H,P等雜質元素的含量,改善了析出相的大小與分布.鑄錠具有良好的熱加工性能,經鍛造和中溫熱機械處理后,縱向室溫延伸率分別超過8%和10%,屈服強度超過400MPa,斷裂強度達到700 MPa,力學性能與同類真空冶煉大體積材料的性能相當.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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Key words:
- iron-aluminide /
- electroslag refining /
- air induced melting /
- mechanical Properties
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