La2O3掺杂方式对MR14板材性能的影响
Effect of La2O3 doping methods on the properties of MR14 plates
王广达 1张丹华 2熊宁 2况春江2
作者信息
- 1. 钢铁研究总院有限公司,北京 100081;安泰科技股份有限公司,北京 100081
- 2. 安泰科技股份有限公司,北京 100081
- 折叠
摘要
La2O3在钼中可以细化晶粒尺寸,钉扎位错,提高钼的强度.铼可以降低钼的塑脆转变温度,提高强度和延伸性能.为了充分发挥La2O3的细晶强化作用,进一步提升MR14板材的性能,通过固固掺杂、固液还原掺杂和液液掺杂三种混粉工艺,研究了 La2O3掺杂方式对MR14合金的性能影响.研究表明,固液还原掺杂和液液掺杂两种混粉方式,均可以细化晶粒,提高显微硬度和室温力学性能,且性能差异较小,伸长率比固固掺杂的板坯高50％.
Abstract
La2O3can refine grain size,pin dislocations,and improve the strength of molybdenum.Rhenium can re-duce the ductile brittle transition temperature of molybdenum,improve its strength and elongation performance.In order to fully utilize the fine grain strengthening effect of La2O3 and further improve the mechanical properties of MR 14 sheet,this article studied the effect of La2O3 doping methods on the properties of MR 14 alloy through three powder mixing processes:solid solid doping,solid liquid reduction doping,and liquid liquid doping.Research has shown that both solid-liquid reduction doping and liquid-liquid doping can refine grain size,improve microhard-ness and room temperature mechanical properties,with small performance differences and a 50％higher elongation than solid-liquid doped plates.
关键词
钼铼合金/稀土氧化物/掺杂工艺/微观组织/力学性能Key words
molybdenum-rhenium alloy/rare earth oxide/doping method/microstructure/mechanical property引用本文复制引用
基金项目
国家重点研发计划专项资助项目(2022YFB3705400)
出版年
2024
NETL
NSTL
万方数据