Cu-P耐候钢中稀土对夹杂物和耐蚀性的影响  

Cu-P Weather Resistance Steel: Influence of Rare Earths on Nonmetallic Inclusions and Anticorrosivity

作　　者：岳丽杰[1] 王龙妹[2] 徐成海[1] 朴秀玉[3] 

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110004 [2]北京钢铁研究总院冶金工艺所,北京100081 [3]北京科技大学冶金与生态工程学院,北京100083

出　　处：《东北大学学报（自然科学版）》2004年第12期1179-1182,共4页Journal of Northeastern University(Natural Science)

基　　金：国家'十五'科技攻关项目(2002BA315A 5)

摘　　要：通过金相光学显微镜、JSM 6400扫描电镜及能谱仪对洁净度较好的两组试验耐候钢板坯进行分析观察,采用非水电解分离夹杂和ICP方法分析钢中固溶稀土含量·采用干 湿周浸室内加速试验方法对试验钢和对比A3钢进行了研究,测得了试验钢的腐蚀率·并用电化学方法测得了带锈样的极化曲线·研究得出试验稀土耐候钢中全氧在～0 002%,硫在～0 004%的水平时,稀土总含量为0 0065%～0 016%,可以保证长条硫化物基本变质,且随着稀土含量的增加钢的耐腐蚀性能逐步提高·全氧在0 002%～0 007%,硫在～0 008%的水平时,稀土总含量为0 005%～0 025%,可以保证长条硫化物基本变质·Two groups of the RE weathering resistant steel slabs were observed and analyzed for testing with metalloscope and SEM/EMPA. Solid-soluble content of rare earths in steel was analyzed by nonaqueous electroanalysis and ICP. The weathering resistance of the steel and steel Q235 as reference specimen were studied by dry-wet immersion test, with their corrosion rates obtained. The polarization curves of the RE steel and Q235 were measured by electrochemical methods. A conclusion was drawn that when the content of oxygen/sulfur of the steel specimens is about 0.002%/0.004% the optimum content of RE is 0.006?5%～0.016%, thus causing the bar-like sulphides to nearly deteriorate and improving gradually the anticorrosity of the steel with increasing RE content. When the content of oxygen/sulfur is about 0.002%～0.007%/0.004% the optimum content of RE is 0.005%～0.025%, with near-deterionation of bar-like sulphides observed.

关 键 词：耐候钢 非金属夹杂物 干-湿周浸实验 极化曲线 耐蚀性 

分 类 号：TG142.7[一般工业技术—材料科学与工程]