太原理工大学学报2012，Vol.43Issue(5)：595-602,8.
Ce对0.2C-0.5Si-1.5Mn钢液洁净度与夹杂物变性的研究
Effect of Rare Earth Ce on the Purifying Degree and Inclusion Modification of 0.2C-0.5Si-1.5Mn Molten Steel
摘要
Abstract
In order to improve strength and toughness of high strength low alloy steel and expand its application scope, the 0. 2%C-0. 5%Si-l. 5Mn% steels were chosen as the research object. Low alloy steels with different content of Ce were prepared in vacuum induction furnace by refining after adding rare earth to Q345 H beam steel. Influence of Ce content on the purifying degree and inclusion modification of 0. 2%C-0. 5%Si-l. 5Mn% Steel was investigated. The results show that when the content of Ce was 0. 001% - 0. 045% (mass fraction), the cleanliness of steel increased significantly. When Ce content was 0. 012%, O and S reduced to 0. 000 9% and 0. 001 0% ,respectively; Inclusions were spheroidized and refined. Adding Ce, 15 μm angular A12O3-SiO2 inclusions and MnS of long strips and large volume were changed into RE compound inclusion of 1 - 2 μm or even nanometer size. At the same time, the mechanism of Ce on the purifying degree and inclusion modification of molten Steel was discussed.关键词
Ce/真空精炼/钢的洁净度/夹杂物变性Key words
Ce/ vacuum refining/ purifying degree/ inclusion modification分类
矿业与冶金引用本文复制引用
张风林,任鸿儒,原春阳,王社斌..Ce对0.2C-0.5Si-1.5Mn钢液洁净度与夹杂物变性的研究[J].太原理工大学学报,2012,43(5):595-602,8.基金项目
国家自然科学基金资助项目(50901048) （50901048）
山西省自然科学基金资助项目(2007011069) （2007011069）
