Results 31 to 40 of about 1,237,953 (97)
Jianzhu Gangjiegou Jinzhan为研究铁路钢桥用高强度不锈钢复合钢板的基本力学性能和焊接工艺，对S31603+Q500qE复合钢板及其两类焊接接头开展了拉伸、冲击、冷弯及维氏硬度试验研究，并对复合界面进行了剪切与粘结性能试验。基于试验结果，得到了高强度不锈钢复合钢材的拉伸力学指标、复合界面强度及冲击韧性指标，并对其冷弯成型性能进行了试验验证；同时获得了两类焊接接头的拉伸力学指标、冲击韧性指标及硬度分布规律。结果表明：高强度不锈钢复合钢材的基本力学性能均满足规范要求，复合界面强度远超规范限值，并随基层强度提高而增大 ...
曾周燏 +3 more
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Teshugang, 2012 The phase diagram of a new aluminum-bearing Fe-Cr alloy (/%: 1. 60C, 26. OOCr, 5. 50Al, 0. 50Ni0. 12Y) is calculated by using thermodynamics software Thermal calc and combined with X-ray diffraction analysis the phase composition of the new alloy is ...
高雪云 +4 more
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Low Temperature Impact Toughness of Hot Rolled Steel Sheet Pile SY390BZ
Teshugang, 2011 Material for test of hot rolled steel sheet pile SY390BZ (% ： 0. 23C, 0.44Si, 0.91Mn, 0.06V, 0.010P 0. 002S) is melted by a 55 kg vacuum induction furnace, cast to Φ170 mm round ingot, rolled to 12 mm sheet with 20% reduction in last flat pass and ...
任安超 +6 more
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Technology Practice of Increasing Impact Engergy of Weathering Steel Q550NQR1 at -40℃
Teshugang, 2018 This research investigated 8.0 mm thick high strength weathering steel Q550NQR1 with relatively low -40℃ low temperature impact value, and multiple pearlite segregation bands were observed in core microstructure, although the segregation bands are narrow
崔凯禹
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Teshugang, 2006 Dynamic continuous cooling transformation(CCT)curves and structure transition of non quenched-tempered steel 34Mn2VN(0.30~0.34C,1.20～1.70Mn,0.014～0.018N,0.07～0.
张玉胜 +5 more
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Teshugang, 2008 Inclusion and transversal impact toughness of 14 mm plate of steel 09CuPTiRE with adding 0.042% RE or feeding CaSi wire-adding 0.042%RE after Al deoxidation have been studied by a 50 kg vacuum induction furnace.
华蔚田正宏江来珠
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, 2018 自然界中生物结构的界面总是表现出梯度材料的分布特征,比如牙齿软-硬梯度结构,从而具有比单一材料更好的强度、韧性以及抗冲击性能。本文设计了整体梯度材料和表面梯度材料两种类型的靶板,受到相同速度子弹的冲击,基于靶板背面产生碎片情况、子弹的残余速度、子弹的冲击力以及临界冲击能四个方面以表征靶板的抗冲击性能,并与相同等效杨氏模量的单一材料靶板进行对比。研究结果表明:相比单一材料靶板,整体梯度材料和表面梯度材料靶板的背面均无碎片产生,同时子弹的残余速度均能降为0 m/s;整体梯度材料靶板的临界冲击能提高了86 ...
魏志全, 许向红
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工程科学与技术针对高速公路路基垮塌、桥隧断裂等突发灾害引发的主干道纵向断流及二次伤害防控难题，综述了示警式柔性阻断技术的研究进展。界定“柔性”在物理低波阻抗、逻辑非强制性及空间动态适配3个维度的科学内涵；剖析灾变信号与交通流动力学的时空耦合机理，构建基于监测预警时延链条与车辆制动极限的临界预警空间不等式判据；响应交通运输部关于“感知-决策-执行”全闭环管控的要求，系统归纳数字化虚拟诱导、光影空间遮断、本质安全物理反馈及应急移动布防四类技术范式；重点解析超轻质、低波阻抗介质在瞬时冲击下的动量微扰机理，论证加速度烈度指数（
赵飞 +10 more
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聚硼硅氧烷剪切硬化胶(PSG,Polyborosiloxane Shear Stiffening Gel)被视为一种理想的智能型缓冲吸能材料,对柔性泡沫具有出色的强化赋能效应。为进一步提升防弹头盔缓冲系统用低密度聚合物泡沫(LPF,Low-density Polymer Foam)对人体头部的钝性弹道冲击防护效应,创新性地将PSG引入到LPF泡孔骨架中以形成PSG-LPF复合泡沫材料。研究结果表明:适量PSG能够促进LPF缓冲泡沫的拉压力学特性、冲击防护性能与微观结构特征的同步改善 ...
杨喆 +5 more
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