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The results show that, as black carbon with particleshape, steel fiber with high aspect ratio and density does not reach to the vadose zone in higher content, their mechano-electric effect is not obvious.

研究结果表明:钢纤维长径比小,密度大,和粒子状的碳黑一样,在很高掺量仍处于未渗流区,两种水泥石的力电耦合效应都不明显。

The results show that the shapes of agglomerates are alike to the cluster type inclusion particles in molten steel.

结果表明,模拟得到的凝聚体与钢中簇状类型夹杂物的形状相似。

The results showed that the hardness of CGHAZ is decreasing,bainite ferrite strip coarsens,the shape of M-A constituents transforms strip into block,its size becomes large,and its bulk extends, with increasing of t8/5.In addition austenitic,M-A constituents in γ grain boundary coarsens and manifolds with increasing of t8/5.They all deteriorate the toughness of pipeline.And the extended zone of impact fracture shows brittle.

结果表明,随着t8/5的增加,粗晶区硬度逐渐减小,贝氏体化铁素体粗化,且其间的M-A组元由条状转变为块状,平均弦长增加,体积分数增大,奥氏体晶界M-A组元增多变粗,管线钢的韧性恶化,抗裂性变差,冲击断口扩展区呈脆性断裂。

An ultra-high strength, weldable, low alloy steel with excellent cryogenic temperature toughness in the base plate and in the heat affected zone when welded, having a tensile strength greater than 830 MPa (120 ksi) and a micro-laminate microstructure comprising austenite film layers and fine-grained martensite/lower bainite laths, is prepared by heating a steel slab comprising iron and specified weight percentages of some or all of the additives carbon, manganese, nickel, nitrogen, copper, chromium, molybdenum, silicon, niobium, vanadium, titanium, aluminum, and boron; reducing the slab to form plate in one or more passes in a temperature range in which austenite recrystallizes; finish rolling the plate in one or more passes in a temperature range below the austenite recrystallization temperature and above the Ar3 transformation temperature; quenching the finish rolled plate to a suitable Quench Stop Temperature; stopping the quenching; and either, for a period of time, holding the plate substantially isothermally at the QST or slow-cooling the plate before air cooling, or simply air cooling the plate to ambient temperature.

在基体板以及焊接时的热影响区处的低温韧性优异的超高强度、可焊接、低合金钢具有高于830MPa(120ksi)的抗拉强度,并且具有包含奥氏体薄膜层和细晶粒的马氏体/下贝氏体板条的显微层状组织,所述钢的制备过程为:加热含有铁以及特定重量百分比的添加元素的钢坯,所述添加元素为碳,锰,镍,氮,铜,铬,钼,硅,铌,钒,钛,铝,以及硼中的一些或全部;在奥氏体可发生再结晶的温度范围内,采用一个或多个道次,将所述钢坯轧制成板材;在低于奥氏体再结晶温度但高于Ar 3 转变点的温度下,采用一个或多个道次对所述板材进行终轧;将所述终轧板材淬火至一适当淬火终止温度;停止所述淬火;或者在空冷前在QST点基本等温保持所述板材一段时间,或者对所述板材进行缓慢冷却,或者只是简单地将所述板材空冷至室温。

The results show that the steel in different solution has better performance of anti-hydrogen induced cracking,there is no cracking inside the steel; micro-cracking on the specimen surface mainly nucleates at pitting corrosion pits and expands along the polygonal ferrite; the expansion mode is mostly transgranular type, and the expansion terminates in acicular ferrite.

研究结果表明:该管线钢在两种溶液中均具有较好的抗氢致开裂性能,试样内部没有发现裂纹;试样表面的微裂纹主要在点蚀坑处形核并沿多边形铁素体扩展,扩展模式多为穿晶型,并终止于针状铁素体。

Acicular ferrite microstructure in micro-alloyed steels, which nucleates around non-metallic inclusions, especially oxide inclusions, has high strength and good toughness and possesses strong grain-refining ability by itself. The ultra-fine grained steel with excellent weldability is likely to be produced by forming in materials a great number of fine and dispersive micro-inclusions which is helpful to induce AF to nucleate around them through oxide metallurgy technology.

微合金钢针状铁素体组织强度高、韧性好,在奥氏体晶内非金属夹杂物上诱导形核,具有很强的自身细化晶粒的能力,通过氧化物冶金技术控制钢铁材料形成大量细小、弥散,具有诱导AF形核能力的有益微夹杂物,有望获得焊接性能优良的超细晶粒钢。

The principal part of the stadium is a series of steel trusses woven together around the bowl-like audience stand into a form of "nest". Hence the nickname "Bird-nest".

国家体育场设计方案主体由一系列钢桁架围绕碗状坐席区编制而成,形似&鸟巢&,因而得名。

A stadium in Algeria is comprised of bowl-shaped concrete stand and steel roof structure.

阿尔及利亚某体育场结构体系由碗状混凝土看台与钢结构屋盖组成。

14G diamond plate steel tubular frame.

坚固性:14G菱形钢,管状结构。

The presence of austenite at any 10% would causeloss of strength of both steels about 10 kg/mm~2, however, their toughness mightbe actually improved by these softer austenites formed along the boundaries oflath martensite.

回火奥氏体的存在使强度下降,估计10%的奥氏体使强度损失约10kg/mm~2。但较软的回火奥氏体沿板条状马氏体边界形成改善钢的韧性,使冲击韧性a_K提高。

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The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作:对伸臂位于顶部的单层框架—筒体模型进行分析,提出了等效转动约束的概念和转动约束刚度的表达式。

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Its advantage is that it can be used in smaller units.

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