5083合金不同均质制度的组织和性能研究对比  

Comparative Study on Microstructure and Properties of 5083 Alloy with Different Homogenization Systems

作　　者：吴楠 杨旭 岳凯 张宇 郝玉喜 Wu Nan;Yang Xu;Yue Kai;Zhang Yu;Hao Yuxi(Liaoning Zhongwang Group Co., Ltd., Liaoyang 111003, China)

机构地区：[1]辽宁忠旺集团有限公司,辽宁辽阳111003

出　　处：《有色金属加工》2021年第1期67-70,共4页Nonferrous Metals Processing

摘　　要：采用光学金相显微镜、拉伸试验机、SEM及EDS等分析手段,对比分析5083合金不同均质制度下微观组织、力学性能及拉伸断口形貌。研究结果显示,5083合金均质处理后,枝晶组织消除,初生相部分回溶到基体中,弥散相均匀析出,起到一定的弥散强化作用,强度和塑性均优于铸态;未均质铸锭以脆性断裂为主,均质处理的铸锭断裂方式为韧性断裂,其中510℃×28h均质处理的断口韧窝分布均匀、深度大,合金强度高,韧性和塑性好;合金基体上分布着针状、脆性的FeAl3相,510℃×28h均质处理后其尺寸有所减少。The microstructure,mechanical properties and tensile fracture morphology of 5083 alloy under different homogenization conditions are analyzed by means of optical microscope,tensile testing machine,SEM and EDS.The results show that after the homogenization treatment,the dendrite structure of 5083 alloy is eliminated,the primary phase partially is dissolved back into the matrix,and the dispersed phase is uniformly precipitated,which plays a certain role of dispersion strengthening,and the strength and plasticity are better than that of as-cast alloy;the non-homogeneous ingot is mainly characterized by brittle fracture,and the fracture mode of the homogenized ingot is ductile fracture.Among them,the fracture dimples of the homogenized ingot treated at 510℃×28h are uniformly distributed,with large depth,high alloy strength,good toughness and plasticity.The needle-like and brittle FeAl3 phase is distributed on the alloy substrate,and its size is reduced after homogenization treatment at 510℃×28h.

关 键 词：5083合金 均质 显微组织 断口形貌 

分 类 号：TG166.3[金属学及工艺—热处理]