查询词典 Nb

Fine acicular ferrite has good effect on both the strength and toughness of the steel.

细化的针状铁素体有效地改善了实验钢的强度及韧性。X80管线钢中存在两种典型的析出物，一种以Nb，Ti为主，尺寸较大（50--200nm）；另一种以NbC为主，尺寸细小（小于30nm）。

The equilibrium volume fraction, chemical driving force of carbonitride precipitates, atom fraction of each element in austenite and carbonitride at different temperatures were calculated.

以析出热力学为基础，对Fe-Nb-C-N系统中奥氏体/碳氮化物的热平衡过程，计算了不同温度下碳氮化物析出相的平衡摩尔分数、化学驱动力、各组元的原子分数及奥氏体组分等。

This article discussed the thermodynamic model and computing method of solid solution precipitation of ternary second-phase in steel, taking the Nb-V-Ti microalloying carbonitride as an example, and introduced its engineering application in the development of Ti-bearing carbonized gear steel product.

本文以铌、钒、钛的微合金碳氮化物为例讨论了钢中三元第二相平衡固溶的热力学模型与计算方法及其在含钛渗碳齿轮钢产品开发中的应用。

The microstructure evolution, precipitation behavior of carbonitride as microalloying element and its effects on deformation induced ferrite transformation of mild steels with various Nb, V content were investigated on a Gleeble 1500 thermechanical simulator through multi-pass thermo-compression in the temperature range of 820~790℃ to simulate the finish rolling process of plates.

在Gleeble 1500热模拟机上，通过820~790℃温度范围内的多道次热压缩变形模拟了中厚板的精轧工艺，考察了不同铌、钒含量的低碳钢的组织演变过程、微合金元素的碳氮化物的析出行为和对形变诱导铁素体相变的影响。

Doetschman TC, Eistetter H, Kemler R, et al. The in vitro development of blastocyst-derived embryonic stem cell lines: formation of visceral yolk sac, blood islands and myocardium ［J］. J Embryol Exp Morph, 1985,87:27～45.［2］ Robbins J, Doetschman T, Jones WK, et al. Embryonic stem cell as a model for cardiogenesis［J］. Trends Cardiovasc Med, 1992,2:44～50.［3］ Moreadith RW, Radford NB.

被诱导的心肌细胞的判定除常规指标外，我们还用了心脏特异性引物β-MHC对不同收缩时间的心肌细胞总RNA进行RT-PCR扩增和RNA斑点杂交，发现该心肌细胞不仅具有正常心肌细胞的特性，而且在分化早期就高度地表达心脏特异性基因。

ABSTRACT NW/NB-PSCTLC has been prepared by doping a small amount of diacrylate monomer in cholesteric liquid crystals.

在胆甾相液晶中掺入少量的单体材料分别制备了常白和常黑模式PSCTLC。

The content of Ti, Nb and Ta are colorimetrically determined by using H_2O_2, acetone-potassium sulfocyanate and pyrogallic acid respectively.

实验中采用了H_2O_2比色测定Ti，用丙酮-硫氰酸钾比色测定铌，用焦性没食子酸比色测定钽。

The microstructure and mechanical properties of the testing steels have also been studied contrastively.

实验室试制了低碳Nb、V微合金化含硼冷镦钢，并对试验钢的组织和性能进行了对比研究。

They ought to follow Marx'sthought of emancipating mankind and his theoretic logic ofcriticism on the basis of clarifying the standards of humanexistence. Facing the dilemmatic reality of modernity, theymust try to develop a social critical theory that containsboth the critical spirit of Marxism and%26amp;nb sp;the issue of humanliberty and liberation.

在对人类生存规范基础的先行澄明基础上，依照马克思关于人类解放的问题意识和针对原本批判的理论逻辑，着眼于现代性两难的现实，努力发展一种既内含马克思理论的批判精神，又带有指向人类自由、解放实践倾向的社会批判理论，这便是当代马克思主义者的历史责任。

The giant Bayan Obo REE-Nb-Fe deposit is the world's largest REE deposit,which is hosted mainly by Middle Proterozoic Na-rich rocks,dolomitic rock and K-rich slate.

白云鄂博稀土-铌-铁矿是世界最大的稀土多金属矿床之一，主要产于中元古界富钠岩石、白云岩和富钾板岩中。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。