·390· 北京科技大学学报 2004年第4期 9 Kawamiya N,AdachiK,Nakamura Y.Magnetic proper- 10韩志勇，高学绪，张茂才，等.取向多晶FeGa合金 ties and Mossbauer investigations of Fe-Ga alloys [J].J 结构与磁致伸缩应变研究[).自然科学进展，2003， Phys Soc Jpn,.1972,33(5):1318 13(6):655 Effect of Ga Atom on Magnetic Moment of Fe-Ga Alloys HAN Zhiyong,ZHANG Maocai,GAO Xuexu,ZHOU Shouzeng State Key Laboratory for New Advanced Metal Materials,University of Science and Technology Beijing,Beijing 100083,China ABSTRACT The effect of Ga atom on the mean magnetic moment per atom of Fe-Ga alloys was discussed.It was found that FeGa alloys exhibit a markedly different behavior from simple magnetic dilution.With the decrease in mean moment per atom,the moment-per-iron atom increases with the substitution of Ga atom and decreases when the content of Ga atom is larger than 17%. KEY WORDS Fe Ga alloy;magnetostriction;magnetic moment 亚st6tc6堂t6堂置6Ye6望6 ResPooTo6里e6堂w里6Y6里ao6父e望a里a6Ya6Yem里里6堂5Ys堂Y6Yasa6Ya6a%Ye6Ya皇5堂6堂s望a6Y6望5eo堂6sY6望5望 From Journal of University of Science and Technology Beijing,2004,11(4):343 3-D thermo-mechanical coupled FEM simulation of continuous hot rolling process of 60SiMnA spring steel bars and rods AI Jiahe'2,GAO Huiju,ZHAO Tongchun',XIE Xishan',LIU Yu 1)Department of Materials Science and Engineering,Tsinghua University,Beijing 100084,China 2)Materials Science and Engineering School,University of Science and Technology Beijing,Beijing 100083,China 3)Department of Powder Metallurgy,Advanced Technology Materials Co.Ltd,Beijing 100081,China 4)Iron&Steel Technological Center,Liaoning Special Steel (Group)Co.Ltd,Dalian 116031,China ABSTRACT The 3-D thermo-mechanical coupled elasto-plastic finite element method(FEM)was used for the simulation of the two-pass continuous hot rolling process of 60SiMnA spring steel bars and rods using MARC/Auto- Forge3.1 software.The simulated results visualize the metal flow and the dynamic evolutions of the strain,stress and temperature during the continuous hot rolling,especially inside the work-piece.It is shown that the non-uniform distributions of the strain,stress and temperature on the longitudinal and transverse sections are a distinct character- istic of the continuous hot rolling,which can be used as basic data for improving the tool design,predicting and con- trolling the microstructural evolution of a bar and rod. KEY WORDS 60Si2MnA spring steel;bar;rod;elasto-plastic FEM;thermo-mechanical coupled;metal flow一 北 京 科 技 大 学 学 报 年 第 期 盯 ， ， 丫 司 ， ， 韩志 勇 ， 高学绪 ， 张 茂才 ， 等 取 向多晶 司 合 金 结构与 磁 致伸缩应 变研 究 明 自然科学进展 ， ， 司 月叼 ， 凡 几白 ， 通 爪碑已义鱿 口 州比 ， 扮 ， 吨 ， 访 七 州 司 鲜贝 八也 也 ， 奴 刊 功 印 舒 ， ， 了 了 一 一 认 ， ’ ’ ， 去 侧犷 ， 尤陌 石‘ ， ” ， 恤 ， ， ， 口 ， ， 别由 园】 卿 ‘ 助 幽 成 ， 】 ‘ ， 一 一 一 汕 幻刀 一 ‘ 诱 加 泳 妞城 即 ， 一 场叭 小 而 ， 呼加 田傲 ， ， 加明 磁 一 一