共查询到20条相似文献,搜索用时 93 毫秒
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针对转炉炼钢品种多,各个钢种间工艺差距大,使得实际钢种之间的成本差异巨大.根据各钢种间的异同点,将生产钢种根据工艺、性能、难度等因素分成九个大类.优化了炼钢工序成本分摊原则;更准确的反应了各钢种间的成本差异;有利于财务管理.取得了较好的效果. 相似文献
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焊丝钢是用于生产电焊条的钢材,被广泛用于各个行业的生产活动中.天津钢铁集团有限公司根据现有工艺、装备对H08A焊丝钢进行了开发,并试制生产.H08A焊丝钢属于低碳钢,钢种特点是冶炼成分较窄、钢中硅含量低,终点温度、成分和氧含量控制要求高.本文结合H08A焊丝钢的特点制定了生产工艺路线和成分控制要求,分析了生产过程中的难... 相似文献
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《Baosteel Technical Research》2010,4(2):48-53
The effects of the composition and cooling process on the microstructures and properties of hot-rolled ultra-high strength low alloy(HSLA)steel,complex phase steel and martensite steel were studied in the laboratory.And S700MC and MP1200 ultra-high strength steels were trial produced at the 1 880 mm hot-rolling line of Baosteel.Compared with conventional hot-rolled high strength products,the idea that water is alloy was applied in the newly developed hot-rolled ultra-high strength steel.By the use of the economical composition design and controlled cooling after hot-rolling effectively,ultra-high strength steel of different steel grades can be obtained. 相似文献
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本文简要介绍了武钢2~#RH设备及其真空冶金功能;概述了采用该设备的精炼工艺效果、脱硫、成分控制、钢水温度变化和冶炼若干钢种的工艺特点。 相似文献
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本文简介在鞍钢第三炼钢厂转炉上,采用国产直接定氧仪器,在线快速预报铝镇静钢中酸溶铝的测定试验。测定试验表明:有利于提高钢种炼成率和最佳成分命中率;有助于减少铝消耗。在测定准备和操作技术满足要求的条件下,测成率可以达到90%以上。 相似文献
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经济型双相不锈钢的研发进展 总被引:1,自引:0,他引:1
经济型双相不锈钢是一种高性能低成本的氮合金化不锈钢新材料,具有典型的铁素体-奥氏体双相组织。利用氮取代镍元素的奥氏体化作用,降低成本的同时获得优良的力学性能和耐腐蚀性能。介绍了经济型双相不锈钢的发展历史,重点讨论了合金元素和热处理对相变、力学性能和耐腐蚀性能的影响规律,并与304和316进行对比;同时,分析了经济型双相不锈钢焊接性能和焊接工艺的研究进展。经济型双相不锈钢S32101、S32003、S32202等,已用于核电、桥梁、建筑、热交换器等行业,取代传统奥氏体不锈钢AISI 304和316。由于经济型双相不锈钢具有高强度和优良耐蚀性,同时镍、钼等贵金属的含量都较低,已成为未来不锈钢发展的方向之一。 相似文献
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Slag film samples were taken from the mould wall after casting of stainless steel slabs of grade 304, 321, 409L and 430, which represent austenitic, ferritic and titanium stabilized stainless steels. The chemical compositions of the samples were analysed and their phases were identified using a combination of scanning electron microscope (SEM), energy dispersive X‐ray analysis (EDX) and X‐ray diffraction (XRD). Finally the crystallization ratio was determined by SEM. The results show that the chemical compositions of the films during casting differ from the original designed flux composition. Concerning the heat transfer in the mould, the film taken during casting of steel grade 304 showed the highest insulation ability whereas the film taken during casting of steel grade 409L had the lowest insulation ability. The films taken during casting of steel grades 321 and 430 showed average heat insulation abilities. The solidification conditions in the mould during casting of steel grades 304, 321, and 409L matched the solidification requirements of the corresponding steel grades. However, the basicity of the powder for steel grade 430 should be decreased a little in order to improve the lubrication function and counteract sticking tendencies. Perovskite crystals, which usually precipitate at relatively high temperature, were found in the film taken during casting of steel grade 321. This is harmful in view of the safety of the casting process and the surface quality of the slab. 相似文献
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马氏体不锈钢成分、工艺和耐蚀性的进展 总被引:5,自引:0,他引:5
介绍了马氏体铬不锈钢、马氏体铬镍不锈钢和马氏体时效不锈钢的进展和发展动态,讨论了化学成分、热加工、热处理工艺对马氏体不锈钢组织和耐蚀性的影响。当前国内开发的新型马氏体不锈钢主要为符合给定服役条件的专用钢类。优化化学成分,提高钢的纯净度,通过热加工和热处理工艺控制钢的组织,进行表面处理是提高马氏体不锈钢耐蚀性的有效途径。 相似文献
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大厚度电渣钢具有纯净度高、致密性好、成分均匀及使用性能优良等特点。舞钢自建设国内第一台大型扁坯电渣炉开始,陆续开发了数十个大厚度高内在质量的电渣钢品种,填补了国内宽厚板领域高端产品的空白,替代了锻件产品。本文重点介绍舞钢电渣炉现状和电渣钢品种的研制情况,并对产品开发过程中出现的质量问题进行简要剖析,为今后电渣钢高端品种的开发提供思路。 相似文献