钢中夹杂物的来源及性质研究-冶金工程专业论文.docxVIP

钢管力学性能的影响不显著。 5、钢管表面典型缺陷的产生主要是由于管坯中存在的各类夹杂物引起 的。 关键词：夹杂物 短流程 圆铸坯 ll  J111e inclusions have reduced the plasticity,toughness and fatigue life ofthe steel，make cold-forming and hot-forming characteristics and even 80me physical performanc宅of the steel bad．It influence to the intensity,extension, toughness，cutability,corrosion-resisting,surface finish,weld performance of various fields of steel．耵圮concrete intensity that the performance of the inclusion to steel influences are decided by a series of factors，such as quantity, particle magnitude,shape and distribution and SO on． n忙EAF-LF，v】阻HCC proee船system in Hengyang Pipe Factory is a pipe production line that has the special characteristics．It places strict requirement on the molten steel quality．TIlis process affects the formation of the micro-inclnsions in the molten and the size，mechanical behavior,and the dispersion ofthe inclusions closely affect the product quality． In this thesis,a systematic study is conducted on the process inclusions course source,formation mechanism of inclusion,develop law and SO on in order to guide the production,SOme control measure of optimizing the course inclusion are put forward to obtain high-quality tube bloom． 111e main contents： (1)m research of the inclusions 80urce and forming mechanism in the steel； (2)m composition and size analysis ofinclnsions in the steel； (3)ne research of inclusions development from EAF to tundish and the distribute low of inclusions in tube bloom． (4)The research of deformation and distribution of inclusions in rolling COUrSe． (5)‰effect ofprocess inclusions to tube bloom and steel pipe on quality and performance and the control method ofinclnsions arc studied． 11把conclusion： 1、n硷steel is produced easily some surface default in rolling COBrse because rolling slag in the casting and the reoxidation ofmeR steel is serious,the quantity ofbig inclusion is high． 2、111e micro．inclusions source in tube bloom is oxidation than refraction Ⅲ  than rolling slag