利用Y-Mg合金(m(Y):m(Mg)=1:3)复合变质处理碳素结构钢SS400,研究了Y-Mg复合变质对SS400钢显微组织的影响.结果表明,原来比较粗大的SS400钢板条马氏体束,经过Y-Mg复合变质处理后变得相对细小;随着钢中Y-Mg含量的增加,试验钢的珠光体显微硬度明显增大,从未经Y-Mg处理前的平均148.5 HV上升到Y-Mg处理后的平均188.2 HV,增幅为26.7%.未经Y-Mg复合处理的试验钢中珠光体呈短粗状不规则片层形貌,经过Y-Mg复合处理的试验钢中珠光体片层间距、渗碳体厚度减小.随着Y-Mg含量的增加,试验钢的珠光体片间距从335.4 nm减小到了135.3 nm,说明Y-Mg复合变质处理对SS400钢珠光体片层间距的增厚起到了抑制作用,试验钢中珠光体片层间距和渗碳体厚度随着钢中稀土、镁含量的升高而逐渐减小.对Y-Mg复合处理前后的试验钢的晶粒数进行测定和比较:单位面积的晶粒数由1330增加到4569,晶粒度级别由7~7.5增大到9~9.5.随着Y-Mg含量的增高,试验钢每平方毫米晶粒数明显增多,表明Y-Mg复合处理能明显细化晶粒.
参考文献
[1] | Ming Gao;Xiaoyan Zeng;Qianwu Hu;Jun Yan .Laser-TIG hybrid welding of ultra-fine grained steel[J].Journal of Materials Processing Technology,2009(2):785-791. |
[2] | Ming Gao;Xiaoyan Zeng;Qianwu Hu;Jun Yan .Laser-TIG hybrid welding of ultra-fine grained steel[J].Journal of Materials Processing Technology,2009(2):785-791. |
[3] | YI Hai-long,DU Lin-xiu,WANG Guo-dong,LIU Xiang-hua.Development of Nb-V-Ti Hot-Rolled High Strength Steel With Fine Ferrite and Precipitation Strengthening[J].钢铁研究学报(英文版),2009(04):72-77. |
[4] | Sang-Hoon Oh;Young-Ju Kim;Hong-Sik Ryu .Seismic performance of steel structures with slit dampers[J].Engineering structures,2009(9):2123-2131. |
[5] | Sang-Hyo Kim;Jin-Hee Ahn;Chi-Young Jung;Jun-Hwan Kim .Multi-stepwise thermal prestressing using a cover-plate in steel structures[J].Journal of Constructional Steel Research,2009(7):1520-1527. |
[6] | Kim Hyeongyeol;Jeong Younju .Steel-concrete compcsite bridge deck slab with profiled sheeting[J].Journal of Constructional Steel Research,2009,65(08):1751. |
[7] | D.K. Xu;W.N. Tang;L. Liu .Effect of Y concentration on the microstructure and mechanical properties of as-cast Mg-Zn-Y-Zr alloys[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2007(1/2):129-134. |
[8] | L. Gao;R.S. Chen;E.H. Han .Effects of rare-earth elements Gd and Y on the solid solution strengthening of Mg alloys[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2009(1/2):379-384. |
[9] | L.M. Liu;X. Zhao .Study on the weld joint of Mg alloy and steel by laser-GTA hybrid welding[J].Materials Characterization,2008(9):1279-1284. |
[10] | 杨二祥,张世荣,杨红川,于敦波,李扩社,李勇胜.不同Tb/Dy比例对稀土磁致伸缩材料性能的影响[J].稀有金属,2009(05):691-695. |
[11] | 郑文光,王宝峰,朱燕玉.CSP工艺条件下低碳钢板带材力学性能研究[J].内蒙古科技大学学报,2008(03):223-226. |
[12] | 黄楠;孙丽钢;刘哲 .CSP工艺钢板表面裂纹测试与分析[J].包钢科技,2008,34(05):24. |
[13] | 张凯,张奎,李兴刚,徐玉磊,雷健,袁海波.钇在AZ91D镁合金熔体中溶解机制的实验研究[J].稀有金属,2008(06):689-693. |
[14] | 周永军,张国英,王兆阳,杨智.稀土对镍基高温合金性能影响的电子理论研究[J].稀有金属,2008(06):731-734. |
[15] | 颜建辉,张厚安,李益民.微量镁对Mo-Si混合粉末机械合金化的影响[J].稀有金属,2008(02):189-194. |
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