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快速凝固Ni_(48)Mn_(33)Ga_(19)合金的加热相变组织和结构的研究 被引量：1

Martensitic Transformation and Morphology of Ni_(48)Mn_(33)Ga_(19) Alloy by Copper-mold Vacuum Suction Casting
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摘要 采用铜模吸铸式快速凝固法制备了非化学计量成分的N i48Mn33Ga19合金,研究和比较了经常规冷却和吸铸式快速冷却工艺热处理后合金相变点以及组织和结构的变化规律。结果表明,加热相变过程均为两阶段相变过程;快速凝固工艺可使铸后热处理试样的相变温度接近室温;极高的冷却速率提高了组织均匀性;N i48Mn33Ga19合金组织经热处理后由奥氏体转变成10层马氏体。 The Ni48Mn33Ga19 alloy was prepared by rapid solidification technology （copper-mold vacuum suction casting ）. The martensite transformation temperature, structure and morphology of Ni4s Mn33 Gal9 alloy treated by casting and copper-mold vacuum suction casting process were studied and compared. The results show that there are two stage transformation process during heating. After heat treatment, martensite transformation temperature of the alloy prepared by rapid solidification technology is near room temperature, and the uniformity of microstructure is improved due to very high cooling rate. The microstructure of Ni4sMn33Ga19 alloy is characteristic of ten-layered martensite transformed from austenite after heat treatment.
作者 胡美贤 谢致薇 杨元政 曹玮 杨进明 张永章 苏佳佳
机构地区 广东工业大学材料与能源学院
出处 《金属热处理》 EI CAS CSCD 北大核心 2006年第6期28-30,共3页 Heat Treatment of Metals
关键词 NI2MNGA 马氏体相变 Ni48Mn33Gal9合金 Ni2 MnGa martensitic transformation Ni4s Mn33 Ga19 alloy
分类号 TG139.6 [一般工业技术—材料科学与工程]
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参考文献11

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金属热处理
2006年 第6期

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