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
张昌青 1史煜 1王烨 1谷怀壮 1马东东 1张鹏省2
作者信息
- 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;兰州理工大学材料科学与工程学院,甘肃兰州 730050
- 2. 西北有色金属研究院,陕西西安 710016
- 折叠
摘要
采用冷喷涂法将Si粉末沉积到Q235钢棒端面形成约20 μm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Fe2Als和Fe3Al被力学性能较好的Al2Fe2Si3、Al0.5Fe3Si0.5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.
Abstract
Cold spraying method was used to deposit Si powder on the end face of Q235 steel rod to form an interlayer with 20 pm 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 Fe2Als and Fe3Al are replaced by Al2Fe2Si3 and Alo.sFe3Sio.s 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Key words
aluminum/steel dissimilar joint/continuous drive friction welding/interlayer/intermetallic compound/mechanical property引用本文复制引用
基金项目
国家自然科学基金(51961025)
国家自然科学基金(52261013)
出版年
2024
NETL
NSTL
万方数据