共查询到20条相似文献,搜索用时 62 毫秒
1.
3.
本文阐述了保护渣的作用与特性,对低碳、中碳和高碳复合渣的应用进行了分析研究,形成了石墨渣系高、中、低碳系列保护渣。文中指出试制的以高炉水渣-电厂灰为基配制的复合可用于钢锭保护浇注。 相似文献
4.
5.
本文着重叙述模铸保护渣的设计原则、模铸保护渣的一般要求、结构模型、配方、物性检验、保护渣的生产试验方法、生产应用、使用效果以及模铸保护渣的今后发展.总结了十年来,鞍钢在使用保护渣技术上取得的可喜进步,为提高成材率做出了应有的贡献。 相似文献
6.
7.
8.
针对炼钢模铸“三位一体”工艺存在的成本高,工艺复杂,污染环境问题,研制了一种新型铸钢用复合保护渣。将其应用于生产后,可简化操作,并具有安全可靠,减轻环境污染,降低铸钢成本等作用。 相似文献
9.
通过对比BN-45(JJ)、BN-45、MS-1三种不同类型模铸用保护渣的软化温度、半球温度和流淌温度,并在含氮钢进行保护渣对比试验,甄选合适的保护渣,以解决该钢种出现的皮下夹渣、裂纹等缺陷。试验研究表明,三种试验保护渣的熔化温度与熔化时间由高到低依次为:BN-45(JJ)、MS-1、BN-45,熔化温度区间由大到小依次为:MS-1、BN-45、BN-45(JJ)。在相同条件下,通过三种保护渣的等量对比试验可知,BN-45(JJ)保护渣不适用于含氮钢的浇铸,而BN-45、MS-1两种保护渣在含氮钢上的使用效果良好,初轧坯低倍取样未见渗渣情况,盘圆矫直顺利,解决了钢锭皮下渗渣难题,并验证了优选合适品种的保护渣有利于提升产品质量与过程控制水平。 相似文献
10.
陈洪文 《金属材料与冶金工程》1998,(3):11-14
对采用NF-3、ZXD、ZXG3种石墨型复合模铸保护渣时钢的增碳情况进行了试验研究,结果表明,3种保护渣均引起了钢锭表面增碳,以用NF-3保护渣的增碳幅度最大;在切头率不同时,3种保护渣钢材样的中心增碳各不相同。用ZXG保护渣钢的表面增碳与中心增碳尚能满足要求,但表面质量与帽口钢渣分离则尚待改进。 相似文献
11.
12.
13.
DAMOAH N. W. Lucas 《钢铁研究学报(英文版)》2011,(Z2):283-297
This paper reported the observation of inclusions in the steel of an ingot runner. Thermodynamic modeling was performed to study the formation mechanism and sources of inclusions. CFD modeling on fluid flow, heat transfer, solidification of molten steel was carried out and the entrapment of inclusions in runner steel was predicted and compared with the measurement. Al2O3-based inclusions were the main ones in the steel samples. MgO?Al2O3 mainly stemmed from the lining refractory. The high MnO inclusions in the runner steel came from the runner slag. The effect of natural convection was very important for the cooling and solidification of the steel in the runner. Both the observation and the modeling show that > 50μm inclusions more accumulated on the upper area in the runner and < 50μm inclusions dispersed well and more accumulated on the lower area of the runner. 相似文献
14.
较系统阐述铝铸锭锯切机设计过程中结构参数、工艺参数及功率的确定,根据相应的公式,可以方便地计算出锯切机的主要设计参数,文中公式均在实践中得到实际应用。 相似文献
15.
针对现有 30kg 银锭浇铸工艺银锭产品存在四周棱角锋利、表面有缩坑、凹凸不平等问题,分析了银锭外观质量影响因素,开展了针对性优化改造。改造后,银锭表面无缩坑,底面、侧面平整,四周菱角圆滑,彻底解决了银锭外观质量问题。 相似文献
16.
通过对B25.6t这一目前国内自行设计的最大锭型的成坯率进行统计分析,证明该锭型投入生产后,能有效地节约能源,提高设备生产能力,扩大产品规格等,可提高成坯率及成材率,收到显著的经济效益。 相似文献
17.
In the uphill teaming method of ingot casting molten metal from the ladle goes into the runner system, which feeds one or several ingot moulds. This method is still important for production of bearing steel. In order to make clean steel, which has a controlled amount of inclusions, good understanding of inclusions characteristics is necessary. In this work non‐metallic inclusions of steel left in the runner part of an ingot casting system were studied. Inclusion type, size, and morphology were the main focus of this study. A scanning electron microscope (SEM) was used to assess inclusion size and morphology. The chemical composition of inclusions was determined by SEM equipped with EDS. An automated program called ‘INCAFeature’ was used to collect statistics of inclusion characteristics. Based on the statistical analysis of inclusion composition, four types of inclusions including oxides, sulfides, carbonitrides and complex inclusions were defined. The inclusion characteristics in the runner were also compared to literature data of inclusions found in ladle and mould samples. 相似文献
18.
19.
GX型模铸保护渣的研制与应用 总被引:2,自引:0,他引:2
GX型模铸保护渣除具有还原保护、吸附夹杂物和保温基本功能外,能较好地解决模壁粘渣。指出保持液渣中玻璃相的绝对量,造成玻璃相和条状硅灰石析晶之间因物质差异而产生的应力,使粘渣易于脱落;控制使用后液渣中Al_2O_3含量在15%左右,可保持保护渣使用性能的稳定性。生产实践获得明显的经济效益。 相似文献
20.
分析了20kg铝锭连续铸造机打击装置存在的问题以及对铸造生产和铸模使用寿命的影响,提出并实施了一种新型打击装置,取得了良好效果。 相似文献