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~1.0s-1,变形温度为950~1200℃条件下的流变应力进行了研究.结果表明:在实验范围内,Fe-15Cr-25Ni高温合金热压缩变形过程中发生明显的动态再结晶;用Zener-Hollomon参数的双曲对数函数能较好的描述Fe-15Cr-25Ni合金流变行为;所回归的峰值应力表达式为:σp＝21.3139lnε·+9.580495×105·Τ-1-538.12;热变形激活能Q＝373.71kJ/mol. 关键词:Fe-15Cr-25Ni高温合金; 热压缩变形; 流变应力; Zener-Hollomon参数; 热变形激活能; [全文内容正在添加中] ......
Spectral Parameter Study on Tm3+ in Na5Tm(WO4)4 Crystal姚连增,张海峰摘 要:ＳｐｅｃｔｒａｌＰａｒａｍｅｔｅｒＳｔｕｄｙｏｎＴｍ３＋ｉｎＮａ５Ｔｍ(ＷＯ４)４ＣｒｙｓｔａｌＹａｏＬｉａｎｚｅｎｇ(姚连增)(ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｒｉｎｇ,ＵｎｉｖｅｒｓｉｔｙｏｆＳｃｉｅｎｃ...关键词:......
Force Parameter Model of 3-Roll Mills for Continuous Cold Rolling WiresBaolong Zheng1; Li Sun2; Ruichen An2; Jin Wang1; Weichang Zhu1(l Material Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China2 Tangshan iron and Steel Co. Ltd., Tangshan 063000, China)摘 要: 低碳钢奥氏体晶粒尺寸的控制
胡安民1,孙祖庆1,杨王玥1
(1.北京科技大学新金属材料国家重点实验室,北京,100083)
摘要:分别采用高温形变再结晶和低温变形后快速加热冷却等两种方法获得尺寸不同的低碳钢奥氏体晶粒组织.通过控制形变温度,形变量,应变速率及变形道次等工艺参数,低碳钢奥氏体高温形变动态再结晶可使晶粒细化到15-20 μm左右奥氏体动态再结晶晶粒尺寸取决于Zener-Hollomon(Z)参数,提高应变速率及降低形变温度都有利于Z参数增大,流变应力峰值较高,奥氏体动态再结晶晶粒减小.通过奥氏体化后淬火-650℃回火-室温变形-快速加热冷却工艺,得到奥氏体的平均晶粒尺寸可达10 μm以下.奥氏体晶粒细化可归结为铁素体向奥氏体的转变与铁素体回复再结晶的相互竞争.
关键词:低碳钢; 奥氏体; 动态再结晶; Zener-Hollomon参数;
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......低碳钢奥氏体晶粒尺寸的控制
来源： 《金属学报2000年第10期》——胡安民 孙祖庆 杨王玥
Thermal expansion of lattice parameter of (powder) silicon up to 1473 KXING Xianran, CHEN Jun, DENG Jinxia, and LIU GuirongDepartment of Physical Chemistry, University of Science and Technology Beijing, Beijing 100083, China摘 要:<正>The XRPD (X-ray powder diffxactometry) patterns of silicon powder with a unit cell structure of diamond were......
Change monitoring of earth rotation parameter with Maglev gyroscope precessional torqueYANG Zhi-qiang, GONG Yun, SHI Zhen, LI Yun(Geological Engineering and Geomatics Institute, Chang’an University, Xi’an 710054, China)Abstract:Through analyzing the relationship between gyro dynamic torques produced by the changes of earth rotation parameters (ERP), a method of measuring the earth rotation......
Thermodynamic parameter calculation and evaporation behavior of elements in Ti-Al-V alloysCHEN Zi-yong(陈子勇), XU Li-juan(徐丽娟), SHU Qun(舒 群),KONG Fan-tao(孔凡涛), CHEN Yu-yong(陈玉勇)(School of Materials Science and Engineering,Harbin Institute of Technology, Harbin 150001, China)Abstract:Excess free energy of the molten binary system and partial mole excess free energy of the components in ternary......
Structural-acoustic coupling characteristics of honeycomb sandwich plate based on parameter sensitivity analysisWANG Sheng-chun(王盛春), SHEN Wei-dong(沈卫东), XU Jia-feng(徐嘉锋), LI Yun(李赟) (Key Laboratory of Special Power Supply, Chongqing Communication College, Chongqing 400035, China)Abstract:The structural-acoustic coupling model for isotropic thin elastic plate was extended to honeycomb sandwich......
Hot deformation behavior and process parameter optimization of Ti22Al25Nb using processing mapJing-Li Zhang,Hong-Zhen Guo,Hou-Quan LiangSchool of Materials Science and Engineering,Northwestern Polytechnical University摘 要:The hot deformation behavior of Ti22A125 Nb was investigated by hot compression test.The flow stressstrain curves can be divided......
Asymmetry ratio as a parameter of Eu3+ local environment in phosphorsIlya E.Kolesnikov1,2,Alexey V.Povolotskiy1,Alexey V.Kurochkin1,Erkki Lhderanta21. Saint Petersburg State University2. Lappeenranta University of Technology LUT摘 要:Study of the local environment of certain ion is quite a complex problem. Due to the unique luminescent properties, Eu3......
