CAJ | 학술논문

制备了不同稀土含量的银合金，用电子探针扫描仪观察了几种银合金的铸态组织和再结晶退火组织。研究合金的铸态组织时发现，含微量稀土(0.016％La)的银合金为固溶态，显示大晶粒组织；含0.12％RE的银合金有少量分散的球状第二相稀土化合物分布在大晶粒组织上；含1.2％RE的银合金中的稀土化合物枝晶形成连续的网状分布。稀土元素的加入，细化了冷变形再结晶组织的晶粒，经过破碎、再聚集所形成的分散的银稀土化合物第二相有效地强化了银合金，并提高合金的热稳定性。
제비료불동희토함량적은합금，용전자탐침소묘의관찰료궤충은합금적주태조직화재결정퇴화조직。연구합금적주태조직시발현，함미량희토(0.016％La)적은합금위고용태，현시대정립조직；함0.12％RE적은합금유소량분산적구상제이상희토화합물분포재대정립조직상；함1.2％RE적은합금중적희토화합물지정형성련속적망상분포。희토원소적가입，세화료랭변형재결정조직적정립，경과파쇄、재취집소형성적분산적은희토화합물제이상유효지강화료은합금，병제고합금적열은정성。
Silver based alloys with different contents of rare earth elements have been made. Their ascast and re-crystallized microstructures have been observed by aid of SEM. It is found that the silver based alloy with trace content of RE (0.016% La) presents itself as solid solution and its grain is coarse. In the microstructure of silver based alloy with 0.12% RE, a little amounts of spherical second phase of RE compound dispersed at interfaces the coarse grains has also been observed. The dendritic RE compound in the microstructure of silver alloy with 1.2% RE creates continuous net. Addition of the RE elements makes grains of the re-crystallized microstructure after cold deformation fined. The RE compound second phases having been shattered and re- crystallized strengthen the silver based alloys efficiently and improve their heat stability.