共查询到18条相似文献,搜索用时 328 毫秒
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王军 《金属材料与冶金工程》2010,38(1):26-29
根据湘钢生产帘线钢XLX72A的实际情况,对炼钢工艺过程中的化学成分、夹杂物和碳偏析的控制思路和方法进行了阐述.提出了一套行之有效的帘线钢生产炼钢工艺控制方法。 相似文献
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帘线钢是橡胶的骨架材料,70级、80级帘线钢已被广泛应用到轮胎生产中.介绍了国内某钢厂LX70帘线钢盘条的生产过程控制情况.通过优化炼钢、轧钢生产工艺,钢坯低倍、夹杂物控制、索氏体含量等达到控制目标.用户使用结果表明,LX70盘条能够满足生产70级钢帘线的指标要求. 相似文献
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研究了攀钢新钢钒公司生产帘线钢72A过程中钢中氮含量变化对钢中TiN夹杂析出的影响。研究发现,随着钢中氮含量的升高,钢中析出的TiN夹杂数量变多,尺寸变大。热力学研究表明,在帘线钢中TiN一般只能在固相区形成,考虑元素偏析对凝固前沿元素富集的影响,凝固过程中TiN能在固液两相区析出。在帘线钢生产过程中,为了控制钢中TiN的析出,除了控制钛含量,控制钢中氮含量及氮偏析更加重要。理论计算结果表明,当钢中钛的质量分数控制在0.0003%~0.0005%区间时,将钢中氮的质量分数控制在0.0017%~0.0029%区间内能显著降低乃至杜绝帘线钢中TiN的析出。攀钢将帘线钢中钛、氮的质量分数分别控制在0.0005%以下和0.002%以下,显著减少了钢中TiN的析出,个别炉次中没有发现尺寸大于2μm的TiN夹杂。 相似文献
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碳含量对帘线钢凝固析出TiN夹杂的影响 总被引:1,自引:0,他引:1
对含碳量(质量分数)分别为0.72%、0.82%和0.95%的帘线钢凝固析出TiN夹杂进行热力学研究,结果表明:碳含量对于不同强度级别的帘线钢中TiN夹杂的析出有着明显的影响.随着帘线钢碳含量增加,凝固前沿温度逐渐降低,析出TiN夹杂所需的氮钛活度积也逐渐下降.在相同的钢液初始Ti、N含量条件下,较高碳含量的帘线钢中析出的TiN夹杂尺寸会大于较低碳含量帘线钢中析出的TiN夹杂尺寸.为了控制超高强度级别的过共析帘线钢中TiN夹杂的析出对帘线钢加工性能的有害影响,必须通过冶炼工艺进一步降低钢液中的钛、氮含量. 相似文献
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随着社会经济的迅速发展,我国对钢铁的需求量也越来越大,帘线钢作为洁净钢中的代表受到了人们的青睐。帘线钢在生产应用中,其质量主要取决于帘线用钢坯的质量及帘线盘条的性能及质量,一旦其含有杂物或硫化物,则会直接影响帘线钢的生产质量,本文在此针对高碳帘线钢精炼渣的组成做如下论述。 相似文献
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《钢铁研究学报(英文版)》2011,(Z2):52-58
As the market demand for clean steel increased,a number of new technologies for clean steel production have been developed in some domestic and foreign steelmaking plants.Based on the existing equipments and technical conditions in the No.1 steelmaking plant of Ansteel,a series of clean steel technologies have been integrated including single bay duplex-dephosphorization in steelmaking control technology,high efficiency desulfurization technology,the control technology for nitrogen content during the whole process,the control technology for hydrogen content in VD,and the systematic control technology for oxygen content.A series of process for all kinds of ultra-low phosphorus,ultra-low sulfur and relative low level of inclusions have been designed in clean steel production.This process include hot metal desulfurization and slag-off,single bay duplex-dephosphorization in BOF,molten steel slag-off,LF processing,VD processing,and continuous casting with protection,then a stable,low-cost and large-scale production process has been formed.Applying this integrative technology,the sum of 5 major elements including phosphorus,sulfur,oxygen,nitrogen,hydrogen is less than 80×10-6 in high alloy steel scale production,and the industrial applications for clean steel technology have been achieved. 相似文献
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《钢铁研究学报(英文版)》2011,(Z2):42-51
This paper analyzes the technology for clean steel production in modern iron and steel plant,a philosophy with production efficiency,manufacturing cost and product performance in its core.It also makes a review on functions of high-efficiency,low-cost and high-quality steel products manufactured by the new generation iron and steel plant,in combination with the study on design of steelmaking-continuous casting process of Shougang Jingtang iron and steel Plant.By applying precise and dynamic design system to optimize and allocate systems and working procedures of hot metal pretreatment,converter smelting,secondary refining,continuous casting process,etc,a platform of high-efficiency,low-cost and high-quality clean steel production is built. 相似文献
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运用Aspex Explorer扫描电镜对比了3种不同初始状态钢包冶炼条件下的帘线钢盘条中夹杂物成分、变形性能以及数量密度等,指出不同初始状态的钢包对帘线钢精炼渣成分和成品[Al]含量的影响。结果表明,同等条件下,分别使用冶炼过Si、Al-Si以及Al脱氧钢的钢包冶炼帘线钢时,精炼渣碱度、渣中Al_2O_3含量和成品[Al]含量均呈上升趋势,对应精炼渣碱度分别为0.95、1.1、1.4,渣中Al_2O_3质量分数分别为7.0%、11.0%、15.0%,成品[Al]的质量分数分别为7×10~(-6)、13×10~(-6)、16×10~(-6)。采用冶炼过Al、Al-Si脱氧钢的钢包冶炼的帘线钢盘条夹杂物数量密度分别为0.96、1.20个/mm~2,夹杂物中Al_2O_3平均质量分数分别为25.9%、31.8%,夹杂物塑性差,轧制后长宽比平均值分别为5.6、5.1。采用冶炼过Si脱氧钢的钢包冶炼的帘线钢盘条中夹杂物数量密度为0.79个/mm~2,夹杂物中Al_2O_3平均质量分数为15.0%,为塑性夹杂物,轧制后长宽比均值为11.3。实验证明,冶炼帘线钢不宜使用初态为Al脱氧或者Al-Si脱氧的钢包。 相似文献
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《Baosteel Technical Research》2010,(Z1):61
With the development of automobile industry,tire is marching toward lighter,energy-saving and safer,and it has been a trend for steel cord to develope in high strength and ultrahigh-strength.In order to reduce fracture of tire cord,steel cord is producted with bloom casting machine by soft reduction to reduce segregation,with clean steel smelt technology to control inclusion.TMCP of wire cord is improved in Baosteel.With technological advancement,the quality of steel cord has been noticeably raised and ultrahigh-strength has developed successfully.The paper introduces the development of steel cord in Baosteel. 相似文献