宝钢钢管全浮动芯棒连轧工艺的技术进步

全浮动芯棒连轧管生产线工艺的突出问题是钢管存在“竹节”现象和壁厚均匀度差。围绕提高钢管壁厚均匀度和消除“竹节”现象,进行持续的工艺技术改进,通过改善芯棒润滑条件,自主开发张力减径机非传统孔型,开发大规格孔型和高铬钢产品,提高生产线工艺自动控制水平等,使该生产线继续发挥能力,为用户提供高精度、高钢级的产品。     

中美两国输水钢管的差距及展望

通过调研美国输水钢管的发展历程,分析中美两国输水钢管的生产制作、检测等硬件以及设计技术和防腐等软性要素方面的现状可知,在以设备为主要支持的硬件方面,两国差距不是很大;主要差距是在输水钢管的设计理念、标准规范执行等以人的要素为主要支持的软性问题方面,包括壁厚设计、接口技术、防腐措施等多个重大方面都存在着较大差距。指出国内输水钢管线生产成本高,品质低。我国输水钢管生产企业应增强竞争能力,关注行业发展动向,吸收美国的发展成果经验,开创输水钢管发展新局面。     

治理攀钢烧结烟气二氧化硫污染的对策分析

介绍了攀钢烧结烟气的特点、二氧化硫的来源。将当前常用的烧结烟气脱硫技术按脱硫剂的主要成分归为钙法、氨法和炭法,评述了它们的技术特点。然后结合攀钢的实际,分析攀钢烧结烟气脱硫技术的要求,提出炭法烟气脱硫技术最适合攀钢。然后对该技术应用在攀钢产生的经济效益进行了详细的阐述,最后对该技术在攀钢的应用提出了项目实施建议。     

The influence of pre-straining on the corrosion fatigue performance of two hot-dip galvanised steels

The corrosion fatigue behaviour of a hot-dip galvanised ferritic pearlitic steel and of a hot-dip galvanised Ti-alloyed high-strength interstitial free steel was investigated. The testing mode was constant displacement, fully reversed plane bending. Both materials were tested as received and 10% uniaxially pre-strained. The effect of pre-straining on the zinc coating was investigated using polarisation resistance measurements and the scanning reference electrode technique (SRET). It was found that pre-straining is detrimental to the corrosion fatigue behaviour of both steels, due to damage to the zinc coating, leading to increased localised corrosion and in general higher corrosion rates.     

Corrosion Resistance of Ceramic Coating on Steel Substrate

Fe/Al2O3 ceramic coating was made by spraying and sol-gel. The corrosion resistance between Fe/Al2O3 ceramic coating and steel 45# was studied. By microscope and X-ray diffraction, the binding and the composition of the interface were also analyzed. The results showed that Fe/Al2O3 ceramic coating had dense struc- ture, less porosity and better binding with the substrate which was effective to prevent erosive liquor immersing into the inside of ceramic coating. Some substances that distributed homogeneously in Fe/Al2O3 ceramic coating, such as α-Al2O3, FeAlO3 and Fe3Al, could improve the corrosion resistance of this material.     

Mechanisms of nanostructure and metastable phase formations in the surface melted layers of a HCPEB-treated D2 steel

This work investigates the mechanism of surface modification associated with the high-current pulsed electron beam (HCPEB) treatment of a D2 steel with increasing numbers of pulses. The surface layers were melted and resolidified but the treated surfaces showed very different features. This variation is essentially due to the different levels of homogeneity and carbide dissolution. It is demonstrated that the presence of carbides served as nucleation sites for the surface eruption phenomenon that creates craters on the surface. After a sufficient number of pulses, most of the carbides in the surface layer were dissolved and an almost crater-free homogeneous melted layer consisting of a very stable nano-austenite structure was formed. The HCPEB technique is thus demonstrated to be a versatile technique for surface microstructure modification involving, in the case of steels, austenite stabilization and ultrafine grain formation.     

16MnR和08Cr2AlMo异种钢的焊接工艺

通过对08Cr2A1Mo钢管与16MnR管板的焊接性分析,并进行焊接工艺试验,解决了08Cr2A1Mo与16MnR异种钢的焊接问题。     

Development Tendency of the Refractories for Iron ＆ Steel Industry in China

This paper introduces the developing tendency of refractories for iron and steel industry combined with the new metallurgical techniques applied in iron and steel industry in China. Refractories for blast furnace long service life, smelting reduction iron-making process, secondary refining metallurgies and clean steel making, near net shape continuous casting are described respectively. To meet the requirement of iron and steel industry, the high quality, multi-functions and environment-friendly refractories with long service llfe will be focused and developed in the future. In addition, high grade refractories in China have great developing space and potential market.     

用冶金渣制备聚硅硫酸铁的研究

用钢渣和水渣制备出聚硅硫酸铁,分析了影响因素,制备的聚硅硫酸铁净水用量少、无毒、混凝效果好。     

16Mn管线钢焊接接头性能试验研究

针对我国石油储运行业中广泛采用的16Mn管线钢上的螺旋焊缝,通过力学拉伸试验,测量了焊接接头部位的屈服强度和抗拉强度,分析了管线最大承载能力与有效焊接面积和未焊透深度之间的变化关系。