保护气氛中丝电爆喷射沉积工艺  

Spray deposition process of wire electrical explosion in protective atmosphere

作　　者：白学虎 朱亮[1,2] 韩峰 王旭东 Bai Xuehu;Zhu Liang;Han Feng;Wang Xudong(School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou Gansu 730050,China;State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal,Lanzhou University of Technology,Lanzhou Gansu 730050,China)

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050 [2]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050

出　　处：《金属热处理》2020年第3期158-162,共5页Heat Treatment of Metals

基　　金：国家自然科学基金(51765038)。

摘　　要：开发了在保护气氛中丝电爆喷射沉积装置,在小直径圆柱体上选用纯铝丝进行电爆喷射沉积试验。分析沉积层形成过程中的影响因素与显微硬度。结果表明:在试验沉积距离下,宽度为3 mm的约束槽中发生电爆获得约4 mm宽的沉积层。整个圆柱面搭接沉积后,沉积层的厚度趋于均匀。当电容充电压为9 k V,铝丝直径为 0.3 mm时,获得的沉积层的孔洞率最小、硬度值最高。沉积层中晶粒尺寸约为4μm。A wire electrical explosion spray deposition device was developed with a protective atmosphere,and a pure aluminum wire was used for the electrical explosion spray deposition test on a small diameter cylinder.The influencing factors and the micro-hardness were analyzed.The results show that under the test deposition distance,an electrical explosion is occurred in the constrained groove with a width of 3 mm and a deposition layer with width of about 4 mm is obtained.After the entire cylindrical surface is lapped,the thickness of the deposition layer is tended to be uniform.When the charging voltage of the capacitor is 9 k V and the diameter of the aluminum wire is 0.3 mm,the obtained deposition layer has the smallest void ratio and the highest micro-hardness.The grain size in the deposited layer is about 4μm.

关 键 词：丝电爆 喷射沉积 孔洞率 硬度 

分 类 号：TG174.44[金属学及工艺—金属表面处理]