退火温度对5B06铝合金电弧增材制造组织与力学性能的影响  

Effects of Annealing Temperature on Microstructure and Mechanical Properties of 5B06 Aluminum Alloy by Arc Additive Manufacturing

作　　者：蒋海涛[1] 贾娜姿 步贤政[2] 胡洋[2] 游东洋 JIANG Haitao;JIA Nazi;BU Xianzheng;HU Yang;YOU Dongyang(Office of Military Representative, Chinese Navy in 239 Factory, Beijing 100010, China;Beijing Hangxing Machinery Manufacturing Co., Ltd., Beijing 100010, China)

机构地区：[1]海军驻北京二三九厂军事代表室,北京100010 [2]北京航星机器制造有限公司,北京100010

出　　处：《热加工工艺》2018年第8期163-165,共3页Hot Working Technology

摘　　要：采用了不同退火温度对5B06电弧增材制造结构件进行了后处理工艺试验,并对退火热处理后材料的组织与力学性能进行了分析与研究。结果表明：5B06铝合金电弧增材组织为铸造组织,平均晶粒尺寸约为40～80μm,晶粒的形态分布不均匀,层间搭接部位为柱状晶,层内部为等轴晶,组织特征具有明显的各向异性。250℃以下退火对5B06电弧增材制造材料强度影响不大,但能使其塑性提高;280℃以上退火使5B06电弧增材制造材料强度与塑性明显降低,原因是晶粒的长大以及第二相质点聚集与球化。The post-treatment process test of 5B06 arc additive manufacturing structure parts was carried out at different annealing temperatures, and the microstructure and mechanical properties of the annealed materials were analyzed and studied. The results show that, the arc additive manufacturing microstructure of 5B06 aluminum alloy is cast structure, the average grain size is about 40-80 μm, and the shape distribution of grain is not uniform. The mierostructure of interlaminar overlap is columnar and the microstructure of layer is equiaxed. The microstructure has obvious anisotropy. The annealing at temperature lower than 250 ℃ has little effect on the strength of the 5B06 arc additive manufacturing material increasing, but it can improve its plasticity. After annealing above 280 ℃, the strength and plasticity of 5B06 are obviously decrease. The reasons are grain growth, and particle aggregation and spheroidization of the second phase.

关 键 词：电弧增材制造 退火工艺 组织 力学性能 

分 类 号：TG156.2[金属学及工艺—热处理] TG166.3[金属学及工艺—金属学]