摘要
利用光学显微镜、拉伸试验机和冲击试验机等研究了混合稀土对2205双相不锈钢组织和力学性能的影响。结果表明:加入适量混合稀土能使该钢在1 050℃固溶后的组织细化、铁素体含量减少、奥氏体含量增加;稀土含量为0.046%时,经固溶后钢的强度增大,塑、韧性显著提高,其抗拉强度、伸长率、断面收缩率和冲击功比不加稀土的分别提高了3.97%,11.67%,24.55%和9.10%。
The effect of mixed rare earth （RE） on microstructure and mechanical properties of 2205 duplex stainless steel was studied by optical microscopy, tensile testing machine and impact testing machine. The results show that the proper amount of mixed rare earth could refine the microstructure of the steel, decrease the content of ferrite and increase the content of austenite after the solution treatment at 1 050℃. When 2205 duplex stainless steel contained 0. 046% RE, its strength, plasticity and toughness were improved obviously after solution treatment. Compared with the steel without RE element, its tensile strength, elongation, reduction of area and impact energy had been improved by 3. 91%, 11.67%, 24. 55% and 9.10% respectively.
出处
《机械工程材料》
CAS
CSCD
北大核心
2010年第8期46-49,共4页
Materials For Mechanical Engineering
关键词
稀土
双相不锈钢
组织
力学性能
rare earth
duplex stainless steel
microstructure
mechanical property
