| 热处理工艺对制备粘结Ni52Mn24.4Ga23.6磁体的影响 |
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| 引用本文： | 朱晓莹,张虹,白书欣.热处理工艺对制备粘结Ni52Mn24.4Ga23.6磁体的影响[J].材料热处理学报,2005,26(1):10-13. |
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| 作者姓名： | 朱晓莹 张虹 白书欣 |
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| 作者单位： | 装甲兵工程学院装备再制造工程系,北京,100072;装备再制造技术国防科技重点实验室,北京,100072;国防科技大学材料工程与应用化学系,湖南,长沙,410073 |
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| 基金项目： | 湖南省自然科学基金资助项目(02JJY2082) |
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| 摘 要： | 采用真空感应熔炼法制备了多晶Ni52Mn24．4Ga23．6合金，用粉末压缩压制的方法制作粘结Ni52Mn24．4Ga23．6磁体；通过显微组织观察和差热分析(DSC)的方法研究了不同的浇铸方式和退火工艺对多晶Ni52Mn24．4Ga23．6合金铸锭组织和性能的影响。结果表明，缓慢冷却的合金液能得到晶粒粗大的合金铸锭；两步退火工艺能使合金铸锭具有确定的马氏体转变点，并促进马氏体变体的形核和长大。
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| 关 键 词： | 粘结Ni52Mn24.4Ga23.6磁体 热处理 冷却速度 退火 |
| 文章编号： | 1009-6264(2005)01-0010-04 |
Effects of Heat Treatment on the Preparation of Bonded Ni52 Mn24.4 Ga23.6 Magnets |
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| ZHU Xiao-ying ,ZHANG Hong,BAI Shu-xin.Effects of Heat Treatment on the Preparation of Bonded Ni52 Mn24.4 Ga23.6 Magnets[J].Transactions of Materials and Heat Treatment,2005,26(1):10-13. |
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| Authors: | ZHU Xiao-ying ZHANG Hong BAI Shu-xin |
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| Affiliation: | ZHU Xiao-ying 1,2,ZHANG Hong3,BAI Shu-xin3 |
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| Abstract: | Polycrystalline alloy Ni 52Mn 24.4Ga 23. 6 was prepared by repeated vacum induction melting, and bonded Ni 52Mn 24.4Ga 23.6 magnets were prepared by powder compression method. The e ffects of different moulding and annealing processes on the microstructure and p roperties of Ni 52Mn 24.4Ga 23.6 alloy were investigated by dif ferential scanning calorimetry(DSC) analysis, optical microscopy and scanning mi croscope. The results show that coarse grains can be obtained at low cooling rat e. The fixed martensite transformation temperature of the alloy is obtained and the nucleation and growth of martensite of Ni 52Mn 24.4Ga 23.6 alloy is promoted by two-step annealing process. |
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| Keywords: | bonded Ni 52Mn 24 4Ga 23 6 magnets heat treatment cooling rate annealing |
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