冷喷涂沉积Si中间层对铝钢连续驱动摩擦焊接头组织与性能的影响  

Effect of Cold Spray Deposition of Si Interlayer on Microstructure and Properties of Continuous Drive Friction Welding Joint of Aluminum/Steel

作　　者：张昌青[1,2] 史煜 王烨 谷怀壮 马东东 张鹏省[3] Zhang Changqing;Shi Yu;Wang Ye;Gu Huaizhuang;Ma Dongdong;Zhang Pengsheng(State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China;School of Material Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Northwest Institute for Non-ferrous Metal Research,Xi’an 710016,China)

机构地区：[1]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 [2]兰州理工大学材料科学与工程学院,甘肃兰州730050 [3]西北有色金属研究院,陕西西安710016

出　　处：《稀有金属材料与工程》2024年第9期2524-2534,共11页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51961025,52261013)。

摘　　要：采用冷喷涂法将Si粉末沉积到Q235钢棒端面形成约20μm厚的中间层,使用连续驱动摩擦焊与1060铝棒进行焊接。对比分析Si中间层的添加对接头焊接过程中的摩擦扭矩、焊接温度以及接头力学性能、界面IMCs形貌及性能的影响。结果表明:Si中间层的添加减小了铝/钢界面的摩擦系数,降低了焊接接头摩擦扭矩及峰值温度,进而使得金属间化合物层的厚度降低;界面形貌呈犬牙交错状,接头出现了机械嵌合,增加了接触面积;金属间化合物主要成分Fe_(2)Al_(5)和Fe_(3)Al被力学性能较好的Al_(2)Fe_(2)Si_(3)、Al_(0.5)Fe_(3)Si_(0.5)所替代;接头各位置弯曲角度平均提高59°,其韧性明显增强,力学性能的不均匀性降低。Cold spraying method was used to deposit Si powder on the end face of Q235 steel rod to form an interlayer with 20μm in thickness,and then continuous drive friction welding was used to weld with a 1060 aluminum rod.The effects of adding the Si interlayer on the friction torque,welding temperature,mechanical properties of the joint,and the morphology and properties of the interface intermetallic compound were compared and analyzed.The results show that the addition of the Si interlayer reduces the friction coefficient of the aluminum/steel interface,the friction torque and peak temperature of the welded joint,and further reduces the thickness of the intermetallic compound layer.The interface morphology is interlaced with each other,and the joint has mechanical interlocking,which increases the contact area.The intermetallic compound which are mainly composed of Fe_(2) Al_(5) and Fe_(3) Al are replaced by Al_(2)Fe_(2)Si_(3) and Al_(0.5)Fe_(3)Si_(0.5) with better mechanical properties.The average bending angle of the joint increases by 59°,and its toughness is significantly improved,and the nonuniformity of the mechanical properties is reduced.

关 键 词：铝/钢异质接头 连续驱动摩擦焊 中间层 金属间化合物 力学性能 

分 类 号：TG456[金属学及工艺—焊接]