采用15 t EAF冶炼,25 t LF精炼,740 kg铸锭锻制成Φ110 mm的3Cr2W8V钢材.在LF精炼后期,钢中氧含量为29×10-6,加入0.048%RE合金(%:21～24RE,44Si,3Mn,5Ca,3Ti,余Fe)进行稀土合金处理,稀土元素的回收率为30.78%.检验结果表明,进行稀...采用15 t EAF冶炼,25 t LF精炼,740 kg铸锭锻制成Φ110 mm的3Cr2W8V钢材.在LF精炼后期,钢中氧含量为29×10-6,加入0.048%RE合金(%:21～24RE,44Si,3Mn,5Ca,3Ti,余Fe)进行稀土合金处理,稀土元素的回收率为30.78%.检验结果表明,进行稀土处理能够有效地改善3Cr2W8V模具钢共晶碳化物偏析,并显著减少P、Pb、Sn、As、Sb等有害元素在晶界的偏析.展开更多
A new isopolyoxovanadate [Ni(1,10′-phen) 3] 2 [V Ⅳ 2V Ⅴ 8O 26] was hydrothermally synthesized and structurally characterized by the single crystal X-ray diffraction. The compound crystallizes in orthorhombic system...A new isopolyoxovanadate [Ni(1,10′-phen) 3] 2 [V Ⅳ 2V Ⅴ 8O 26] was hydrothermally synthesized and structurally characterized by the single crystal X-ray diffraction. The compound crystallizes in orthorhombic system, space group Pbcn with a=1.362 9(3) nm, b=2.215 6(4) nm, c= 2.571 2(4) nm, V=7.764(2) nm 3, Z=4, R=0.040 3, wR 2=0.044 6. The compound exhibits an unusual empty ellipsoidal cage, which is constructed by eight {V ⅤO 4} tetrahedra and two {V ⅣO 5} square pyramids via corner-sharing modes. The chiral [Ni(1,10′-phen) 3] 2+ complexes act as the counter cations.展开更多
文摘采用15 t EAF冶炼,25 t LF精炼,740 kg铸锭锻制成Φ110 mm的3Cr2W8V钢材.在LF精炼后期,钢中氧含量为29×10-6,加入0.048%RE合金(%:21～24RE,44Si,3Mn,5Ca,3Ti,余Fe)进行稀土合金处理,稀土元素的回收率为30.78%.检验结果表明,进行稀土处理能够有效地改善3Cr2W8V模具钢共晶碳化物偏析,并显著减少P、Pb、Sn、As、Sb等有害元素在晶界的偏析.
文摘A new isopolyoxovanadate [Ni(1,10′-phen) 3] 2 [V Ⅳ 2V Ⅴ 8O 26] was hydrothermally synthesized and structurally characterized by the single crystal X-ray diffraction. The compound crystallizes in orthorhombic system, space group Pbcn with a=1.362 9(3) nm, b=2.215 6(4) nm, c= 2.571 2(4) nm, V=7.764(2) nm 3, Z=4, R=0.040 3, wR 2=0.044 6. The compound exhibits an unusual empty ellipsoidal cage, which is constructed by eight {V ⅤO 4} tetrahedra and two {V ⅣO 5} square pyramids via corner-sharing modes. The chiral [Ni(1,10′-phen) 3] 2+ complexes act as the counter cations.
