【摘 要】
：
Effects of Mg addition on the solidification macrostructure of Ti-stabilized ultra-purity ferritic stainless steels was evaluated experimentally in order to obtain the fine equiaxed grains.Thermodynam
【机 构】
：
Research Institute,Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China
论文部分内容阅读
Effects of Mg addition on the solidification macrostructure of Ti-stabilized ultra-purity ferritic stainless steels was evaluated experimentally in order to obtain the fine equiaxed grains.Thermodynamic analysis on formation of complex inclusions by adding Mg was carried out combined with the SEM-EDS analysis.Equiaxed solidification was promoted by adding Mg,the proportions of equiaxed grain zone of 409L,4003,439 and 443NT stainless steel increased remarkably.Mg addition produces spinel oxide in the molten steel,which accelerate the TiN formation,and enhances columnar-to-equiaxed transition during the solidification.
其他文献
实际连铸生产条件下，铸坯在结晶器内的凝固伴随着复杂的流动与传热等过程的交互作用和相互影响，研究结晶器内钢液的流动状态和传热行为对设计和优化连铸工艺具有指导意义。建立了基于结晶器温度实测数据的板坯连铸结晶器传热反问题的数学模型和基于大涡模拟湍流模型的结晶器内流场与温度场耦合计算的数学模型。对于反传热问题采用二维层片法进行求解，模拟分析了结晶器温度和热流的分布状况,确定了结晶器与铸坯之间的热流密度.然
The refining process of ultra-pure ferritic stainless steels was studied in laboratory.The effects of Fe-Si-Al alloy with different Si/Al ratio on deoxidation process and the typical inclusions after
Titanium diboride ( TiB2) have been widely studied as one of the most promising engineering ceramics and refractory material because of its excellent physical and chemical properties such as high melt
在脱硫扒渣的过程中,不同批次铁水包扒出的铁水会相互渗透,导致渣铁凝固结成大块,难以破碎,针对这一问题,宝钢集团新疆八一钢铁股份公司第二炼钢厂开发了一种使用炼钢系统自产废料制备脱硫渣阻断剂,使用该阻断剂后不仅降低了脱硫渣的加工处理难度,渣铁回收率达到92％以上,而且减轻了环境污染,予以浅述。
在连铸结晶器保护渣成分范围内制备了CaO-SiO2-Al2O3-Na2O-CaF2五元水淬渣样,在渣样化学成分和Raman光谱检测分析的基础上,计算了熔体结构单元含量,进而讨论了 熔体碱度和Al2O3含量对熔体聚合程度的影响和铝离子的存在形式.结果表明,随着碱度的升高,熔体的NOB/T值增大,聚合程度降低,随着Al2O3含量的升高,熔体的NOB/T值减小,聚合程度升高.熔体中的硅离子主要以Q0\Q
Laboratory investigation on formation of inclusion in Ti-Al complex deoxidized C-Mn steel was carried.The results are as follows : when Al content in steel is very low ( [ Al] = 0.000 5%),0.003% 0.00
连铸坯皮下缺陷对后续热轧钢板表面质量合格率影响较大.应用扫描电镜分析、能谱分析和显微镜技术等分析手段,研究了IF钢铸坯皮下缺陷的类型及形成的起因.该类缺陷发生在热轧卷宽度方向上无明显规律,在轧制延伸过程中造成钢板分层开裂并形成翘皮缺陷.结果表明：大部分缺陷都是夹杂物氧化铝、氧化钙等,同时附有气泡,而单纯是或气泡和保护渣卷入的缺陷很少,与有关文献报道不全一致.结合该钢种的热轧生产数据表明：采用直弧形
This paper study on two process routes of ultra-low sulphur steel,"Hot metal desulphurization-Basic oxygen furnace-Ladle powder injection-LF refining" and " Hot metal desulphurization-Basic oxygen fur
结晶器流动模式影响着铸坯的表面质量，为了获得实际生产实践中结晶器的最佳流动模式,本文利用数值模式方法,研究了不同断面条件下,浸入式水口深度、拉速对结晶器内流动模式的影响,得出了最佳的工艺参数搭配。
Results of work on melting,pouring,forging and heat treatment of 415 ton ingots from steel of 45 H3 MIF as semiproducts for manufacturing of large backup rolls according to order of company《 Severstal