工程科学学报2016，Vol.38Issue(z1)：1-7,7.DOI:10.13374/j.issn2095-9389.2016.s1.001
TP347H精炼渣二次氧化控制及夹杂物变性处理
Reoxidation control of refining slag and inclusion modification in TP347 H stainless steel
摘要
Abstract
The secondary oxidation caused by compositions of refining slag and Ca treatment on oxide inclusion was studied in TP347H stainless steel by EF+VOD+IC process. In industrial trials, the aluminum is used as the final deoxidation during VOD process. The FeO and SiO2 contents in refining are decreased and the quaternary basicity is higher than 1. 3. Then the total oxygen content is below 0. 003%. With Ca-Si wire feeding and soft blowing the hard Al2 O3 and MgAl2 O4 inclusions are transformed to CaO--Al2 O3 inclusion. The amount of MgAl2 O4 inclusion is reduced and the melting point of inclusion is below 1500℃. This kind of inclu-sion is liquid during steelmaking process and it is easy to coalescence and flotation. And in the following rolling and forging process the inclusions have a little deforming ability with the matrix deformed and prevent the ingot crack.关键词
TP347H/精炼渣/二次氧化/钙处理Key words
TP347H/refining slag/secondary oxidation/Ca treatment分类
矿业与冶金引用本文复制引用
张乐辰,包燕平,王敏,张超杰..TP347H精炼渣二次氧化控制及夹杂物变性处理[J].工程科学学报,2016,38(z1):1-7,7.基金项目
中国博士后科学基金资助项目(2014M560890,2015T80039) （2014M560890,2015T80039）
