Advances in the research of nitrogen containing stainless steels

The current status of nitrogen containing stainless steels at home and aboard has been introduced. The function and existing forms of nitrogen in the stainless steels, influence of nitrogen on mechanical properties and anti-corrosion properties as well as the application of nitrogen containing cast stainless steels were discussed in this paper. It is clear that nitrogen will be a potential and important alloying element in stainless steels. And Argon Oxygen Decarbonization (AOD) refining can provide an advanced manufacture process for nitrogen containing stainless steels with ultra-low- carbon and high cleanliness.     

反向洗涤装置的计算

文中公式与图表有助于溶质回收率、洗液速率和洗涤段数的计算,从而使反向洗涤装置的设计最为经济合理。用适宜的溶剂以洗     

COMPARISON BETWEEN THEORETICAL FORMULA AND EXPERIMENTAL RESULTS ON BUBBLE ELECTROPHORESIS

ＣＯＭＰＡＲＩＳＯＮＢＥＴＷＥＥＮＴＨＥＯＲＥＴＩＣＡＬＦＯＲＭＵＬＡＡＮＤＥＸＰＥＲＩＭＥＮＴＡＬＲＥＳＵＬＴＳＯＮＢＵＢＢＬＥＥＬＥＣＴＲＯＰＨＯＲＥＳＩＳ￥ＸｕＪｉｒｕｎ；ＫｅｌｓａｌｌＧＨ（Ｐ．Ｏ．Ｂｏｘ１３９，ＮｏｒｔｈｅａｓｔｅｒｎＵｎｉ...     

300t钢水包的喷补

<正> 提高钢水包内衬寿命的最有发展前途的方法是半干喷补.契列波维茨冶金联合工厂的平炉车间,为提高钢水包的寿命,现在使用的有三台喷补装置:一台装在机器上可以移动,用于充填300t钢水包整体内衬;另外两台固定在第二和第三钢水包修理坑上. 固定式喷补装置是ЦЛАМ联合工厂研     

直接还原法生产铝硅合金

在大容量电炉内用还原法工业规模制取铝硅合金的工艺过程包括:原料的破碎,称量,混合,制团和团块炉料的干燥;在矿热还原炉内还原炉料制取一次铝硅合金;精炼制得的合     

包中精炼装置的设计、实现及其在锻造钢锭上的应用

CREUSOT-LOREI公司的布勒伊钢厂曾于一九七九年底安装了一套100t电弧加热的钢水包精炼装置。本文简要介绍一下该装置的情况及其操作方法。使用结果表明:电炉的生产常大大得到改善,同时又降低了铁合金的费用,用单独一台电炉即可生产出其重量需用两炉钢水的钢锭。改善了成分的分散情况,能获得很低的硫、磷含量,可按常规进行操作,又具有很大的可靠性。浇注温度的调节有明显改善。包中精炼看来是一种极好的手段,可以用来生产高级钢锭,经济效果也很好。     

美国铝工业空气污染控制法规

引言美国环境保护局(EPA)受权制订若干规范、条例来保护与提高全国的大气质量。其中关于限制原铝和再生铝工厂排放污染物的规范和条例是:新固定污染源的运行标准;协助各州政府制订现有污染源标准和排放指南,以及     

鈉作为四氯化钛还原剂的优缺点

根据已发表的有关鈉热法制取鈦的資料,与鎂热法相比較,可系統地归納出鈉热法制取鈦的下列优缺点。优点: 1.生产一公斤鈦所需的鈉成本比鎂低。 2.可用簡单而便宜的过滤方法制取高純鈉。 3.鈉的熔点低,并且不与最重要結构材料起作用,能够用泵进行管道輸送,由过滤器     

鋁硅酸鈉在鋁酸鈉溶液中的溶解度

大家知道,当SiO_2和鋁酸鈉溶液接触初期,SiO_2溶解速度超过溶解度小的鋁酸鈉的生成速度,其結果是在最初的2～3小时內,溶液中SiO_2达到其最大介稳濃度。以后的过程将发生脫硅反应而优先生成溶解度小的鋁硅酸鈉。鋁酸鈉溶液中鋁硅酸鈉的溶解度决定了SiO_2在鋁酸鈉溶液中的平衡含量。     

STUDY ON THE STABILITY OF T’PHASE IN THE Al-Zn-Cu TERNARY SYSTEM

The phase constitutes and phase compositions in the eight alloys designed with dif-ferent compositions of Al--Zn--Cu system have been determined after the homogenoustreatment and then equilibrium cooling to 20℃ by use of optical microscope, electronprobe microanalysis and X--ray diffraction. It has been found that there existed the T'phase in the seven alloys. Consequently, it was testified that the T' phase was stableat room temperature. At the same time, the phase relationship was not locally rightfor the isothermal section of 20℃ of Al--Zn--Cu system of the ASM published in 1997.