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Analysis of the formation conditions and characteristics of interphase and random vanadium precipitation in a low-carbon steel during isothermal heat treatmentSayed Ghafar Hashemi,B.EghbaliDepartment... parameters. The effects of characteristics of vanadium precipitates formed during isothermal heat treatment on the hardness of the ferrite matrix in low-carbon vanadium-alloyed steel were investigated through......
Trans. Nonferrous Met. Soc. China 29(2019) 2400-2410 Complexation separation for vanadium and chromium by dithiocarbamate and its application in treatment of chromium-vanadium-bearing slag Xue-feng... chromium-vanadium-bearing slag produced in conventional vanadium production industry. Vanadium and chromium could be extracted from the slag in the form of calcium vanadate and Cr2O3 product with a purity......
-lan, LIU Zeng-xun, Lü Qing, ZHANG Zhen-feng. Analysis on slag skull on BF copper cooling stave for vanadium-bearing titaniferous magnetite smelting[J]. Iron and Steel Vanadium Titanium, 2012, 33(1... in a Chinese steel plant 2.2 煤气温度变化对冷却壁变形的影响 如图5所示,在各渣皮厚度条件下,煤气温度的变化均会线性地增大壁体变形量,在不同的渣皮厚度条件下,冷却壁变形量随煤气温度上升的趋势大小有所区别.以渣皮厚度5 mm为例,当煤气温度由1200 ℃上升至1400 ℃,冷却壁位移由0.583 mm增加至0.741 mm,增大了27.1%.这说明即便在有渣皮保护的条件......
Leaching of magnesium from desiliconization slag of nickel laterite ores by carbonation process MU Wen-ning(牟文宁)1, ZHAI Yu-chun(翟玉春)2, LIU Yan (刘 岩)2 1. Department of Materials Science... 2009; accepted 30 December 2009 ____________________________________________________________________________________________ Abstract: The leaching of magnesium from desiliconization slag of nickel......
. In Panzhihua Iron and Steel Company, the wastewater is treated by reduction with sodium pyrosulfite, followed by neutralization to form a V-Cr-bearing reducing slag [6]. In which, vanadium mainly...) and Cr(III) can be separated through precipitation method. Based on the thermodynamic analysis, the flowsheet of recovery of vanadium and chromium from the V-Cr-bearing reducing slag is designed. Key......
-filled circular steel tubular (SR-CFST) stub columns under axial compression and to propose the formula of ultimate bearing capacity for SR-CFST stub columns, both 3D finite element model and elasto... of ultimate bearing capacity for the axially loaded SR-CFST stub columns was proposed. The results show that at yield state, the axial stress of section steel is slightly lower than its yield stress......
BOF-LF-RH-CC流程生产38CrMoAl钢关键技术研究赵克文1,2,何生平3,曾建华2,王谦2,王新华-1(1.北京市北京科技大学 冶金与生态工程学院2.四川省攀枝花市攀枝花钢铁集团公司3.重庆大学 材料科学与工程学院,重庆 400044)摘 要:38CrMoAl钢由于钢中[Al]含量极高(w([Al])为0.7%~1.1%),在连铸过程中容易导致水口的堵塞,同时在传统的高SiO2熔渣条件下,钢渣反应将导致钢水成分和熔渣性能发生较大的变化,恶化钢的洁净度.从热力学方面分析了高铝钢钢渣反应特性,得到了适合......
Effect of Cooling Rate and Vanadium Content on the Microstructure and Hardness of Medium Carbon Forging SteelWeijun Hui1,Yongjian Zhang1,Chengwei Shao1,Silian Chen2,Xiaoli Zhao2,Han Dong21. School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University2. Center Iron and Steel Research Institute摘 要:This paper reports the effect......
微量钒对超低碳BH钢退火再结晶动力学和组织的影响陈超1,史文1,吴学亮1,王华1,高永军1,李麟1(1.上海市上海大学材料科学与工程学院)摘 要:对添加微量钒的含钛超低碳烘烤硬化钢再结晶动力学和组织进行了研究.结果表明,加钒缩短了再结晶转变过程,同时降低了退火温度对再结晶转变曲线的影响且细化晶粒.添加钒元素使再结晶激活能Q值显著降低,表明含钒钢可降低再结晶退火温度,有节能降耗意义.此外加钒对热轧组织和再结晶组织均有良好影响.关键词:超低碳烘烤硬化钢； 钒微合金化； 再结晶激活能； 显微组织......
大方坯轴承钢中心偏析的成因及预防措施何庆文1,2,王宝1,王福明2,刘青2(1.北京市北京科技大学 冶金与生态工程学院2.山东省莱芜市莱芜钢铁股份有限公司特殊钢厂)摘 要:对莱钢特钢厂连铸生产的大方坯轴承钢中心偏析的成因进行分析,研究了中间包钢水过热度等因素对中心偏析的影响,并对莱钢特钢厂的生产实践提出了预防措施.改善连铸轴承钢的中心偏析的方法和途径有:降低和稳定过热度,合理选择拉速,二冷强度和电磁搅拌参数等.关键词:轴承钢； 方坯； 中心偏析； 预防措施......
