摘要
为了提高钢/铝复合界面的结合强度,采用表面具有大量凸起结构的钢基体,对钢基体表面进行助镀、助镀+热浸镀不同预处理后,采用砂型铸造钢/铝复合铸件。研究了基体表面不同预处理对钢/铝复合界面组织和力学性能的影响。结果表明,在钢基体未进行热浸镀处理时,钢/铝界面处存在大量的缝隙,界面结合方式为机械结合,结合效果差,界面剪切强度为9.6 MPa。钢基体经过热浸镀处理后,钢/铝界面发生冶金结合,生成由Fe_(2)Al_(5)、Al_(8)Fe_(2)Si和Al_(4.5)FeSi相组成的金属间化合物层;钢基体凸起处和直界面处的金属间化合物层的厚度分别为35.3、29.4μm,界面剪切强度为48.7 MPa。
In order to improve the bonding strength of the steel/aluminum composite interface,the steel matrix with a large number of convex structures was utilized,which was prepared by sand casting after different pretreatments of plating aid,plating aid+hot dip on the surface of steel substrate.The effects of different surface pretreatment on the microstructure and mechanical properties of steel/aluminum composite interface were investigated.The results indicate that there are a lot of crevices at the interface between steel and aluminum without hot-dip treatment.The interface bonding mode is characterized by mechanical bonding with the poor bonding effect,and the interface shear strength is 9.6 MPa.After the hot-dip treatment of steel matrix,metallurgical bonding occurs at the interface between steel and aluminum,forming intermetallic compound layer composed of Fe_(2)Al_(5)phase,Al_(8)Fe_(2)Si phase and Al_(4.5)FeSi phase.The thickness of intermetallic compound layer at the convex and the straight interface of steel matrix is 35.3μm and 29.4μm,respectively,and the interfacial shear strength reaches 48.7 MPa.
作者
郭冰鑫
董渊
王宇
侯富敏
毛红奎
徐宏
张文达
侯建兵
赵强胜
Guo Bingxin;Dong Yuan;Wang Yu;Hou Fumin;Mao Hongkui;Xu Hong;Zhang Wenda;Hou Jianbing;Zhao Qiangsheng(School of Materials Science and Engineering,North University of China;Shanxi Electromechanical Design and Research Institute Co.,Ltd.;Shanxi Diesel Engine Industry Co.,Ltd.;Shanxi Zhongbing Foundry Co.,Ltd.)
出处
《特种铸造及有色合金》
CAS
北大核心
2022年第1期93-99,共7页
Special Casting & Nonferrous Alloys
基金
国防科工局稳定支持经费专项-兵器五五所开放创新基金资助项目(JB11-12)
安徽省重点研究与开发计划资助项目(202004a05020070)
山西省重点研发计划国际科技合作资助项目(201903D421080)
山西省自然科学基金青年基金资助项目(201801D221148)
山西省高等学校科技创新资助项目(2020L0319)
关键词
钢/铝
表面预处理
金属间化合物
结合强度
Steel/Aluminum
Surface Pretreatment
Intermetallic Compounds
Bonding Strength
