摘要
通过金相显微分析、扫描电镜观察和力学性能测试研究了掺杂对钽条和钽丝组织和性能的影响,分析了在钽丝生产过程中毛刺产生的原因。结果表明:烧结不充分和退火再结晶不完全是造成钽丝生产过程中毛刺和坑点产生的主因;随着掺杂量的增加,钽条晶粒变细,且掺B比掺A细化晶粒的效果更加明显,但随着掺B量的增加烧结变得不充分,钽条密度偏低;随着掺杂量的增加,钽丝的再结晶温度升高,组织晶粒细化,其中掺B比掺A细化效果更加明显;随着掺杂量的增加钽丝室温抗拉强度增加,延伸率则随着掺A量的增加而降低,随着掺B量的增加而升高,且掺B较掺A强化效果明显,B的加入还起到了细晶韧化效果。
Effect of doping on microstructure and property of tantalum bar and wire was investigated through observation of microstructure with SEM andfractography and test of mechanical property at room temperature. The reason caused burr in production process of tantalum wire was mainly analyzed. It wasshown that： insufficient sintering and incomplete recrystallization on annealing were the main reason caused burr and pit in production process of tantalum wire. The grain size of tantalum bar after sintering reduced with the increase in quantity of doping, and the effect of dopant B on decreasing the grain size was more obvious than that of dopant A, even then sintering was to become insuffcient and the density of tantalum bar tended to be low with increasing dopant B. The recrystallization temperature of tantalum wire rose and the grain size could reduce with increase in quan-tity of doping. At the same time, the effect of dopant B on reducing the grain size was more obvious than that of dopant A. The tensile strength of tantalum wire at room temperature increased with enlarging quantity of doping, while its elongation was lowered with increasing quantity of dopant A and rose with enlarging quantity of dopant B. And the strengthening effect of dopant B was more obvious than that of dopant A. Additionally, dopant B played an important role in grain refining and toughening.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2008年第3期381-386,共6页
Chinese Journal of Rare Metals
关键词
钽丝
掺杂
毛刺
组织
性能
tantalum wire
doping
burr
texture
property
