1·And the precipitation of Nb has the effect of precipitation hardening and grain refinement.
钢中铌的沉淀析出具有沉淀强化和晶粒细化的作用。
2·The results show that Nb can increase the structure stability of chilled cast iron.
结果表明，铌可以有效地提高冷硬铸铁高温组织的稳定性。
3·The method of measuring c, s, p, Mn, Si, Cr, Ni, Mo, V, W, ti, Nb, Al element content by DV-4 photoelectric spectroscope on one condition is introduced.
介绍了应用DV - 4光电光谱仪，仅用一种测定条件，测定高合金钢中碳、硫、磷、锰、硅、铬、镍、钼、钒、钨、钛、铌、铝元素的含量的方法。
4·Sapphire and Nb alloy have been successfully brazed by use of tungsten-metallization technique.
通过对蓝宝石的钨金属化，实现了蓝宝石与铌合金的高温封接。
5·The synergistic chromogenic reaction of Nb(V) with both bromopyrogallol red(BPR) and diantipyrylmethane(DAM) in the presence of polyvinyl alcohol(PVA) is studied.
探讨了在聚乙烯醇（PVA）存在下，铌与溴邻苯三酚红及二安替比林甲烷的协同显色反应。