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化学成分和热处理温度对T122耐热钢中δ-铁素体含量的影响包汉生1,程世长1,刘正东1,谭舒平1(1.北京市钢铁研究总院)摘 要:采用Thermocalc热力学计算研究了化学成分和温度对T122钢中δ-铁素体含量的影响,计算和相应试验结果表明,化学成分和热处理温度变化对δ-铁素体含量影响显著,铬含量降低,氮含量和碳含量增加,能明显降低δ-铁素体含量.在1 030~1 070℃的温区热处理,δ-铁素体含量最低;超过1 200℃热处理会产生γ-Fe→γ-Fe+δ-Fe转变,即在低于1 200℃处理不含δ-铁素体的钢......
Trans. Nonferrous Met. Soc. China 22(2012) s722-s728 Microstructure evolution and mechanical properties of Ti-B-N coatings deposited by plasma-enhanced chemical vapor deposition Jung Ho SHIN1,2..., China; 4. School of Chemical Technology, Aalto University, Aalto 00076, Finland Received 21 May 2012; accepted 24 September 2012 Abstract: Ternary Ti-B-N coatings were synthesized on AISI 304 and Si......
be calculated by geometrical calculations due to its irregular shape and internal porosity, it is measured in atomic level by the adsorption of inert gas method [13, 14]. The chemical composition... (IO4 and IO5). The geological map of Odisha and Chhattisgarh region are shown in Figure 1. 2.2 Chemical composition The chemical composition of all iron ore samples were determined by using X-ray......
on the method presented in the standard SL237-1997. To determine the chemical element composition and clayey soil minerals, this paper adopted X-fluorescence spectrometer (XRF) and X-ray diffraction... soil sample was supplied by a pressure plate and weights. Table 1 Clayey soil properties and mineral and chemical composition [17] Figure1 Grain size distribution of clayey soil The data monitoring......
the standards through the subsequent processing. Key words: TA10 alloy; electron beam cold hearth metling (EBCHM); single melting; volatilize; chemical composition 随着钛合金在航空工业中用量的迅速增长,合金的冶金质量显得越来越重要.据统计,不...床炉熔炼过程中,凝壳一直处于熔体状态,在高真空条件下,熔体中的Mo,Ni元素得到挥发所造成的.因此,在实际生产中,应考虑由于凝壳中化学成分不合给铸锭所带来的影响,采用定期更换凝壳或采用适宜方法对合金元素的损失进行必要的补充可避免此类情况发生. 图8 凝壳中取样较浅时的化学成分 Fig. 8 Chemical composition of shallower......
Chemical Extraction Preparation of Delithiated Cathode Materials of Li-ion Battery闫时建School of Materials Science and Engineering,Taiyuan University of Science and Technology摘 要:A method of conventional chemical reaction to prepare delithiated cathode materials of Li-ion battery was introduced. The cathode material of Li-ion battery was mixed......
J. Cent. South Univ. (2018) 25: 1895-1903 DOI: https://doi.org/10.1007/s11771-018-3879-4 A new reaction system to determine nonlinear chemical fingerprint and its use in Panax ginseng identification method based on double reaction system TAN Xue-ying(谭雪莹), DENG Fei-yue(邓飞跃), ZHANG Tai-ming(张泰铭),HUANG Jian(黄坚), CHEN Chun-nan(陈春楠) School of Chemistry and Chemical Engineering, Central South......
Infuence of Composition on Self-toughening and Oxidation Properties of Y-a-SialonsChunfeng Liu1,Feng Ye1,Rongsen Xia1,Lei Zhang1,Yu Zhou1,Yudong Huang21. Institute for Advanced Ceramics,School of Materials Science and Engineering,Harbin Institute of Technology2. School of Chemical Engineering and Technology,Harbin Institute of Technology摘 要:Y-a-sialon......
. Key words: TC18 titanium alloy ingot; chemical composition; uniformity TC18钛合金是一种近β型结构钛合金,其名义化学成分为:Ti-5Al-5Mo-5V-1Cr-1Fe,该合金淬透性好,可用于飞机大的承力构件. 铸锭质量是影响产品加工和使用性能的关键.TC18钛合金中合金元素含量高达17%,高熔点难熔金属Mo含量为5... Zhan-qian, MAO Ling-ling, FENG Ya-qi, DONG Yan-ni, GUO Bin, YANG Guo-qing (Baoji Titanium Industry Co., Ltd., Baoji 721014, China) Abstract: Aiming at the technical difficulties of chemical......
of the composites was also discussed. 2 Experimental 2.1 Raw materials Fly ash (mesh size≤74 μm) and carbon black (mesh size≤30 μm) were used as raw materials, and the chemical composition of fly ash... Trans. Nonferrous Met. Soc. China 22(2012) 129-133 Effects of synthesis temperature and raw materials composition on preparation of β-Sialon based composites from fly ash MA Bei-yue, LI Ying, YAN......