Enabling factors toward production of nanostructured steel on an industrial scale

Utilizing the existing properties of steel, a modern technological society has been constructed. While there are over 25,000 worldwide equivalent steels based on manipulating the eutectoid transformation, there exist only a handful of commercial nanostructured steel alloys based on manipulating the more complex glass devitrification transformation. Thus, research on nanostructured steels is in its infancy, and many further developments are expected with the demonstrated promise of developing new combinations of superior properties. In this article, seven enabling metallurgical factors are presented that ultimately allow a variety of nanostructured steel products to be produced in an ever-increasing array of industrial processing techniques. Additionally, a case example of the formation of nanostructured steel are given showing how these factors can be harnessed on an industrial scale.     

复合泡沫塑料的性能改进研究

为改善复合泡沫塑料的介电性能,采用金属氧化物粒子填充改性双马来酰亚胺空芯玻璃微球复合泡沫塑料得到了高介电常数、低介质损耗因数、低密度、力学性能良好的电介质材料。     

Cooling rate effects on the microstructure and phase formation in Zr51Cu20.7Ni12Al16.3 bulk metallic glass

A detailed transmission electron microscope (TEM) study has been conducted to investigate the microstructures of the Zr₅₁Cu_20.7Ni₁₂Al_16.3 metallic glass formed at different cooling rates. It has been found that the most competitive crystalline phase to the amorphous structure is an oxygen-stabilized FCC NiZr₂-type phase, which in turn acts as the leading phase to trigger the formation of other crystalline phases in the slow-cooled alloy.     

苯基金属试剂对乳醇立体选择性反应的研究

（±）4，10-二氧杂三环［5，2，1，02，6］-癸-8-烯-3-醇在ZnBr2催化下与格氏试剂反应得S－二醇4a，而与街进制AT（OPr-i）3单独作用则得R－H醇4b。探讨了反应机理，并提出了合成不同构型乳醇的新方法。     

炼油厂储罐喷铝内防腐效果分析

分析了炼油厂储罐内壁受到腐蚀的原因,简要介绍了喷铝加传统封闭涂料的防腐工艺及其应用效果,探讨了该防腐工艺的失效机理,并提出了改进措施。     

新型高压电缆快速充气试验装置的设计

对原有的高压电缆气密性试验装置进行了技术缺陷分析,创新设计了一种新型的高压电缆快速充气试验装置,阐述了新型高压电缆快速充气试验装置的优点,并且对新研制的气密性试验装置进行了试验应用说明。     

铟封稳频He－Ne激光器

稳频Ｈｅ－Ｎｅ激光器中布氏窗片的封接引起的各向异性损耗，是影响激光输出功率的主要因素。采用先进的铟封接技术，可以大大改善稳频管的窗口封接质量，从而减小了腔的损耗，明显地提高了稳频Ｈｅ－Ｎｅ激光器的输出功率。     

金属靶板扩孔冲塞穿孔弹头临界锥角分析

研究了刚性锥头弹垂直贯穿金属靶板扩孔冲塞型穿孔模式,在理想弹塑性材料两阶段工程模型的基础上,考虑靶板为硬化材料,得到扩孔冲塞型穿孔弹头临界半锥角及相应的弹道极限.分析了弹头长度、弹丸质量和靶板材料参数对临界半锥角的影响.计算结果与已有试验结果吻合较好.     

基于F型管壳的旋转缝焊技术研究

本文深入研究了旋转缝焊技术,讨论了缝焊中焊边受力、速度变化和热量分布情况,分析了影响旋转缝焊气密性的主要因素.     

红外探测器金属杜瓦瓶锗窗口低温封接技术

为满足钎焊原理和条件的要求,选用软钎焊封接工艺,对锗窗口进行了金属化处理。对金属化材料与焊料的选择、配制以及钎焊等工艺做了大量的探索与实验,并取得了有用的结果。该工艺技术已应用于制作红外探测器件。