稀土对23CrNiMoA钢显微组织和冲击性能的影响
Effect of Rare Earth on Microstructure and Impact Property of 23CrNiMoA Steel
高洁 1罗迪强 1付瑜 1谢科桂 2付春平 2赖朝彬1
作者信息
- 1. 江西理工大学 材料冶金化学学部,江西 赣州 341000
- 2. 新余威奥锻造有限公司,江西 新余 338013
- 折叠
摘要
采用金相显微镜、冲击试验机、扫描电镜和能谱仪等设备,研究稀土对 23CrNiMoA钢的组织和冲击性能的影响.结果表明,在 23CrNiMoA中添加质量分数为 0.018%的镧铈金属后,钢材金相组织并无明显变化;在室温(20℃)试验钢纵向和横向冲击吸收能量分别由 86.0 J和 70.3 J提升至 93.7 J和 85.7 J,等向性提高了 11%,冲击性能得到显著提升.此外,通过观察试验钢的冲击断口形貌可以看出,添加稀土后钢中断口处韧窝数量增多,且分布均匀,同时这些大而深的韧窝底部存在 1 μm 左右的球状稀土夹杂物,这使得冲击断裂时裂纹扩展所需的吸收能量大大提高,对23CrNiMoA钢冲击性能起到良好的改善作用.
Abstract
The effects of rare earth on the microstructure and impact property of 23CrNiMoA steel were studied by metallographic microscope,impact tester,scanning electron microscope and energy spectrum.The results show that the metallographic structure of 23CrNiMoA steel has no obvious change after adding 0.018wt%lanthanum cerium metal.At room temperature(20℃),the longitudinal and transverse impact absorbed energy of the test steel increase from 86.0 J and 70.3 J to 93.7 J and 85.7 J,respectively,the isotropy increases by 11%,and the impact properties are significantly improved.In addition,by observing the impact fracture morphology of the test steel,it can be seen that after the addition of rare earth,the number of dimples at the fracture of the steel increases and the distribution is uniform.At the same time,there is spherical RE inclusions of about 1 μm at the bottom of these large and deep dimples,which greatly improves the absorbed energy required for crack propagation during impact fracture,and plays a good role in improving the impact property of 23CrNiMoA steel.
关键词
23CrNiMoA钢/稀土/显微组织/冲击性能Key words
23CrNiMoA steel/rare earth/microstructure/impact property引用本文复制引用
基金项目
国家自然科学基金项目(52174316)
国家自然科学基金项目(51974139)
江西省重大科技研发专项项目(20194ABC28011)
出版年
2024
NETL
NSTL
万方数据