Effect of Electromagnetic Stirring Process Parameters on Microstructures and Properties of Fe-25Mn-9Al-8Ni-1C-0.2Ti Low-density Iron-based Alloy
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摘要: 采用真空电弧熔炼法制备了由奥氏体相和铁素体相组成的Fe-25Mn-9Al-8Ni-1C-0.2Ti低密度铁基合金,探讨了电磁搅拌电流和电磁搅拌时间对合金微观组织及性能的影响。结果表明:搅拌电流或搅拌时间的变化对合金抗拉强度的影响很小,抗拉强度稳定在(804.20±19.80)~(852.94±19.90) MPa;随着搅拌电流的增大或搅拌时间的增加,合金的伸长率均显著增大,最大值为(27.73±0.68)%;合金室温下的断裂形式以韧性断裂为主。Abstract: Fe-25Mn-9Al-8Ni-1C-0.2Ti low-density iron-base alloys, primarily composed of ferrite and austenite, are prepared using vacuum arc melting, and the influences of electromagnetic stirring current and stirring time on the microstructures and properties of the smelted alloys are investigated. It is concluded that the effects of electromagnetic stirring current and stirring time on the tensile strength of the alloy can be ignored, which ranges between(804.20±19.80)~(852.94±19.90) MPa. As the electromagnetic stirring current increases and the stirring time extends, the elongation of the alloy gradually rises to the maximum value of (27.73±0.68)%. The fracture pattern of the allot at room temperature is mainly ductile fracture.
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