晶粒尺寸对铌钨合金力学性能的影响
Effect of Grain Size on the Mechanical Properties of Niobium Tungsten Alloy
夏明星 1蔡小梅 1刘辉 1王峰 1白润 1白伟 1孙锐 1郑欣1
作者信息
- 1. 西北有色金属研究院,陕西 西安 710016
- 折叠
摘要
本文以铌钨合金为研究对象,通过熔炼、挤压、锻造制备了两种不同晶粒尺寸的铌钨合金棒材,研究了初始晶粒尺寸对经过热处理后棒材的显微组织和力学性能的影响,研究结果将为制备有特殊性能要求的铌合金材料提供一定参考.结果表明,经过相同热处理工艺处理后,初始晶粒尺寸细小的 Φ43 mm 棒材形成均匀细小的等轴晶,而初始晶粒尺寸粗大的 Φ89 mm 棒材形成不均匀且粗大的部分再结晶组织.无论是室温拉伸还是高温(1 100℃)拉伸,晶粒细小的Φ43 mm棒材均呈现较好的屈服强度,分别为401 MPa和272 MPa.因此,铌钨合金的屈服强度与棒材初始晶粒尺寸有关.铌钨合金棒材的屈服强度要求越高,越需制备具有细小初始晶粒的棒材.
Abstract
Two types of niobium tungsten alloy bars with different grain sizes were fabricated by smelting,extrusion,and forging.The effect of initial grain size on the microstructure and mechanical properties of the bar after heat treatment was investigated,providing a certain reference for niobium alloy materials with special performance requirements.The results show that after the same heat treatment process,the Φ43 mm bar with fine initial grain size becomes uniform fine equiaxed grain after annealing,while the Φ89 mm bar with coarse initial grain size developes an uneven and coarse partially recrystallized structure after annealing.Whether tensile tests were conducted at room temperature or high temperature(1 100℃),the Φ43 bar with fine grain size exhibites better yield strength,with values of 401 MPa and 272 MPa,respectively.Therefore,the yield strength of niobium tungsten alloy is related to the initial grain size of the bar.The higher the yield strength of niobium tungsten alloy bar,the more necessary it is to prepare rods with fine initial grains.
关键词
铌钨合金/晶粒尺寸/显微组织/力学性能Key words
niobium tungsten alloy/grain size/microstructure/mechanical property引用本文复制引用
基金项目
陕西省重点产业链项目(2020ZDLGY12-05)
陕西省重点研发计划一般项目(2024GX-YBXM-282)
出版年
2024
NETL
NSTL
万方数据