WANG Chunrong SONG Hailong QU Li CAO Shuzhi Institute of Metal Research
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Academia Sinica
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Shenyang
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China WANG Chunrong Associate Professor
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Institute of Metal Research
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Academia Sinica Shenyang 110015
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China
金属学报(英文版)
A proposal for two types of press close to die,including blank coming in die and Blank cov- ering die,and four criteria for formability is put forward in the study of the superplastic air bulge forming of the metallic thin wall components.A dimensionless weigh mathematic model for the criteria of superplastic air bulge forming is developed to be: Q_w=1.56(WS)/(HF)+2.37(0-(?)π/(180)-r/(r_0)+0.19 The superior formability of components is approaching,if Q_W≥1,and the worse,if Q_W<1.It was confirmed by practice that the above mentioned model is accurate sufficiently.
关键词:
superplastic air bulge
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null
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null
材料科学技术（英文）
A large quantity of laminated fine grain zones were observed in the Al-Mg-Li alloy weld metal by manual TIG, which was not found in ordinary Al alloy welds. The fine grain zone is formed because of the Al-3(Zr,Ti) particles in the filler metal and the manual filling of filler metal in welding process.
关键词:
MA Zongyi YAO Zhongkai Harbin Institute of Technology
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Harbin
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China
金属学报(英文版)
The SiC_w/Al composite prepared by squeeze casting has a combination of superior room temperature specific strength and modulus together with excellent thermal properties.The extrusion can make an improvement on the strength and ductility of the composite from 582 MPa as squeeze casted up to 639 MPa,and on the transformation from isotropic to the anisotropic structure.This seems to be explained by the orientation of whiskers and the densification of dislocations in matrix.TEM observation indicates that the stacking fault is the usual planar defect on the SiC_w surface. composite;;SiC whisker;;Al alloy;;microstructure
关键词:
composite
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null
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null
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null
Corrosion
This paper introduces the design of a localized corrosion rate monitoring instrument that can monitor and evaluate the maximum and stable localized corrosion rate of a nonpassivable metal in a corrosive environment by measuring the current density in a corrosion sensor with an occluded anode.
关键词:
instrument;localized corrosion rate;monitor
祝贞学
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戴起勋
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李桂荣
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王宏明
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徐明喜
上海金属
doi:10.3969/j.issn.1001-7208.2005.05.005
以CaO-SiO2(22.4%)-Al2O3(11.6％)-CaF2(10％)精炼渣作为基础渣系,
添加BaO或Li2O,固定(CaO+BaO或Li2O)/SiO2=2.5,研究渣系熔点和粘度等熔体特性的变化.结果显示加入BaO、Li2O可以明显降低渣系的熔点和粘度,有效改善渣钢反应的动力学条件.当(BaO,Li2O)=15wt％时,熔渣的熔点分别为1267℃和1185℃,远低于作对比的基础渣的熔点1326℃,当温度为1475℃时,熔渣粘度分别为0.98Pa·s和0.51 Pa·s,远小于基础渣的粘度1.79Pa·s,使渣系具有良好的流动性,将显著提高炼钢精炼渣的精炼性能.
关键词:
CaO基熔渣
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BaO
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Li2O
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熔点
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粘度
郭上型
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董元篪
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陈二保
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张友平
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李桂荣
钢铁研究学报
在1 853 K温度下,用强碱性氧化物Li2O,Na2 O,K2O和BaO分别替代CaO-SiO2-Fe2O3-MnO2-MgO-P2O5系熔剂中的部分C aO,进行钢水回磷控制实验.结果表明,上述添加剂影响钢水脱磷效果的强弱顺序为:Li 2O＞Na2O＞K2O＞BaO.推荐Li2O作为CaO基实验熔剂的首选添加剂.确定钢水回磷控制用CaO基熔剂的优化组成为:W(CaO+Li2O)/WSiO2=2.5,W Li2O=15 %,W(Fe2O3+MnO2)≥2 %.当W(Fe2O3+MnO2 )=2 %时,采用上述组成的熔剂可获得48.1 %的脱磷率.向CaO基熔剂中添加10 %～30 %的 Li2O后,其磷酸盐容量lgCp为20.32±0.22,比未添加Li2O时CaO基熔剂的最大磷酸盐容量值增加了0.5～1.0个数量级.
关键词:
脱磷
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CaO基熔剂
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添加剂
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磷酸盐容量
