研究了压缩变形及退火热处理对高纯Ag（99．99％）微观组织的影响。结果表明，高纯Ag铸锭模锻后，经570oC×2h退火可消除铸态组织，屈服强度约为66MPa，随应变的增加应力明显增加；然后经道次变形量20％，总变形量85％的变形，退火温度为360oC时间为1．5h，高纯Ag坯料的微观组织均匀，符合制备靶材的基本要求。
Microstructure of Ag with 99.99% purity after compressive deformation and annealing was investigated. The results show that yielding strength of Ag ingot dieforged and annealed at 570 ~C for 2 h is 66 MPa, and the stress increases significantly with increasing strain,i, e, the strain hardening is obvious. With the rolling deformation of 20% per pass and the coldrolled accumulative reduction of 85% , and then annealed at 360 ℃ for 1.5 h, the microstructure of highpurity Ag is uniform.
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