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of Technology, Harbin 150001, China) Abstract: Dissimilar metals TIG welding-brazing of aluminum alloy to stainless steel was conducted using Al-Si eutectic wire with precoating special flux layer... steel interfacial layer, which is the weak bonding zone of the joint. Key words: dissimilar metal; TIG welding-brazing; precoating flux layer; interfacial layer; mechanical property ......
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低碳Nb微合金钢中Nb溶质拖曳和析出相NbC钉扎对再结晶晶粒长大的影响付立铭1,单爱党1,王巍2(1.上海市上海交通大学材料科学与工程学院2.宝山钢铁股份有限公司研究院)摘 要:通过理论计算并结合实验研究了低碳Nb微合金钢中NbC析出相与Nb固溶原子共同作用对再结晶后奥氏体晶粒长大的影响.结果表明,Nb的溶质原子拖曳与NbC析出相钉扎共同作用阻碍晶粒长大晶界的迁移,高温时NbC析出相的钉扎起主要作用,Nb的溶质拖曳效应并不明显,而相对低温时Nb拖曳对晶粒长大产生明显地抑制作用,理论计算与实验结果吻合良好;溶质原......
words: cellular automaton; computer simulation; grain growth; second-phase particle; pinning ... carlo simulation of growth of polycrystalline Cu films[J]. Surface Science, 2001, 473(1): 25?38. [5] KAD B K, HAZZLEDINE P M. Monte carlo simulations of grain growth and Zener pinning[J]. Mater Sci......
: 熔体直接反应法;熔剂;Al/TiAl复合材料; 中图分类号: TG14 收稿日期:2000-02-28 Effect mechanism of flux in Al-TiO2 reaction system and TiAl3 morphology Abstract: Initial reaction temperature of Al-TiO2 system can be decreased considerably by flux for direct reaction method. For flux FX1, initial reaction temperature is decreased about 130 ℃. Al2O3 film between TiO2 and Al melt......
中碳钢板坯保护渣性能优化及提高拉速工业试验研究赵紫锋1,王新华1,张炯明1,梅峰2,康建国2(1.北京市北京科技大学 冶金与生态工程学院2.宝山钢铁股份有限公司 技术中心,上海 201900)摘 要:通过提高保护渣碱度以及渣中CaF2和Li2O含量,对中碳钢板坯用保护渣进行了优化,并采用优化的保护渣进行了提高拉速工业试验.结果表明:优化的保护渣具有较高结晶温度,较低的粘度和熔点;试验过程中,采用优化的保护渣液渣层厚度平均增加约2 mm,单耗增加0.03 kg/m2;采用优化的保护渣在1.5 m/min拉速下和采......
; 文献标志码:A 文章编号:1672-7207(2009)06-1599-05 Induct motor speed identification based on flux observation ZENG Yi-hui1, 2, ZHU Hao2, ZHU You-wei3... identification with high precision, but its mathematical model is very complex, and it has to match high-speed controller in real-time control, an observation on the rotor flux of the induct machine......
; pinning field; antiferromagnetic; [全文内容正在添加中] ......
and revealed by DSC, SEM and TEM studies. Finally, it is found that the presence of Al4Ca precipitates on the grain boundaries of Ca-added alloy prevents the growth of α(Al) by Zener pinning effect and results in the stability of microstructure during homogenization. Key words: AlMg5 alloy; hot compression; homogenization; microstructure; particle stimulated nucleation; Zener pinning effect 1......
