Determination of niobium oxide in niobium ore and niobium slag by paper chromatographic gravimetry
纸上色层重量法测定铌矿和铌渣中五氧化二铌

After niobium microalloying high carbon steel, the mechanical properties of wire rods was improved.
铌微合金化处理后高碳钢线材得力学性能得到了改善。

After niobium microalloying for high carbon steel, the mechanical properties of wire rods was improved.
处理后高碳钢线材的力学性能得到了改善。

Bainite Transformation of Niobium Microalloyed Steel Under Isothermal and Continuous Cooling Conditions
铌微合金钢等温及连续冷却贝氏体相变

The extraction properties and mechanism of niobium thiocyanate complex with secondary amine7203 are studied.
研究了仲胺7203萃取铌硫氰酸盐络合物的性能及其机理。

Experimental study of the tailings and tailings sintered, temperature, carbon amount to the effects of niobium chloride d.
实验研究了尾矿的烧结，温度，配碳量对铌氯化的影响。

The enrichment and recovery of tantalum and niobium through acid leaching and sodium alkali fusing from tungsten residue is studied.
研究了用酸浸与钠碱熔融法从钨渣中富集和回收钽铌。