韧

Therefore, low-carbon martensitic non-quenched and tempered steels were investigated for this purpose.

为此，制备高强韧的低碳马氏体型非调质钢是我们的主要目的。

"Certainly that each pour is metallurgically exact. Certainly that the ferritizing annealing cycle is absolutely complete. Certainly, through spectrographs and pressure testing, that each casting is flawless."

这种可靠性来自于每次精益求精的冶炼铸造过程，来自于完整系统的铁素基体退火韧化工艺，来自于严格细致的摄谱仪检验和压力试验，保证每次铸造都是完美无缺的。

The results show that the modificator Mg can cause thermodynamic undercooling , and it may absorb in the crystal faces of preferential growth of carbides, which can slow down carbides growing up on plate type and make them tend to be fine, isolated and passivated, and thus the impact toughness is improved greatly.

研究结果表明：在过共晶高铬白口铸铁结晶过程中，变质元素Mg不仅造成热力学过冷，而且Mg可能吸附于碳化物择优长大的晶面上，起到阻碍碳化物片状长大的作用，使碳化物趋于细小、孤立，且边部钝化，使冲击韧度显著提高。

Starting with the toughening of ceramics, the subcritical crack growth model on monotonical loads was set up for the first time, and the V—K curves in the subcritical crack growth process and the effects on them were obtained by use of computer simulation.

首次从材料增韧入手，建立了单向载荷形式下亚临界裂纹扩展模型，并利用计算机数值计算获得裂纹扩展过程中V—K曲线及其影响因素，由此对多晶陶瓷材料疲劳现象的本质进行了分析。

It was found experimentally that HIC happens via nonacid nucleation and then quasi-cleavage along {111} planes when C〓 is higher. Otherwise, in the case of lower C〓, hydrogen enhances ductile fracture via hydrogen-enhancing microvoid nucleation, growth and connection.

对预充氢的310钢薄膜进行TEM原位拉伸表明，当氢浓度较高时，氢致断裂通过空洞形核，然后沿{111}面准解理扩展的方式进行；当氢浓度较低时，氢促进纳米空洞形核、长大和连通，进而导致韧断。

The design methodology is based on a two-degrees-of-freedom control configuration, for which a robust stabilizing controller and a prefilter are designed, respectively, to ensure robust stability and performance.

本质上，其根据二自由度的控制架构，来设计强韧稳定控制器与前置滤波器，以确保控制系统的稳定性与性能表现。

The ductile-brittle transitions due to both temperature and torsional prestrain were discussed by means of the micoscopic parameter ln.

利用扫描电镜测量了BHW60钢、20钢和45钢拉伸试样断口心部的临界空穴扩张比Rc／Ro，并据此分析了由于环境温度和扭转预应变等因素引起的韧脆转变过程及其细观形态。

Compare with other kinds of glass, it has more capability such as quakeproof, anti-theft, bulletproof, blast-resistance etc.

安全：Safety 由于PVB膜强韧且富粘着力，受冲击时不易被贯穿；即使破损，玻璃片仍然与PVB膜牢固的粘连在一起。

New planted ramie often have defects of fewer efficient plant numbers, many of high-branches, difficult to peel bast, low yield, bad fiber quality and so on. Aiming at all these shortages, the cuttage breeding technology of fine varieties and high-yield and good-quality cultivating method, breeding Cutting seedling with several low-branches, planting deeply appropriately, ridging to foster rootstocks when intertilling, was brought forward.

针对苎麻新麻有效株少、高位分枝多、韧皮剥制难、原麻产量低、纤维品质差等问题，提出了培育携带多个低位分枝的扦插苗，麻苗移栽时适当深植，辅以新麻中耕时起垄培蔸的苎麻良种扦插繁殖新技术与新麻高产优质栽培方法。

Fiber harvest rates for ramie, flax and sabaigrass are the industrial scale results while those for kenaf bark and wheat straw are imitating trial results. 2 Harvest rates of CKs are the standard value of respective industry Even if the tested harvest rate is less than the standard value under the

48.0 1 苎麻、亚麻原茎、龙须草的制成率为课题组收集工厂化生产试验结果，红麻韧皮和麦草制成率为模拟试验结果；2对照制成率取行业通用数值（同等条件下比较试验结果低于通用数值，如苎麻化学脱胶制成率仅为62.5

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。