影响反复模压变形法细化两相合金的因素  

The factors influencing grain refinement in constrained groove pressing of two-phase alloys

作　　者：卢洪[1] 彭开萍[1] 

机构地区：[1]福州大学材料科学与工程学院,福建福州350108

出　　处：《金属热处理》2008年第9期46-49,共4页Heat Treatment of Metals

摘　　要：对影响反复模压变形法(CGP)细化两相合金过程的因素,如合金成分、退火温度、模具尺寸等进行了分析和讨论。结果表明,H62黄铜由于低的含锌量,使材料的塑性增加,有利于CGP变形;随着退火温度的升高,β′相增加,不利于CGP变形;较宽的CGP模具压槽可以减少工件重负荷区域的应力并可以反复模压以细化合金晶粒改善性能。The factors influencing grain refinement in constrained groove pressing（CGP） of two-phase alloys such as alloy composition, annealing temperatures and die sizes were analyzed. The results show that due to lower Zn content in H62 brass,the plasticity of the alloy is increased and consequently it is good for CGP deformation;along with the annealing temperature increasing, the [3＇ phase increases but is unfavourable for CGP deformation;and the wider groove can reduce the stresses in the severely loaded region of the workpiece, and thus allow more cycles of pressing to attain grain refinement and improve properties.

关 键 词：晶粒细化 反复模压变形法(CGP) H62黄铜 

分 类 号：TG146.1[一般工业技术—材料科学与工程]