不锈钢板电解表面粗化对不锈钢/铝复合板冷轧接界面结合强度影响的研究

IF 6.1 2区 材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS
Qingsong Bian , Jun Liao , Shijian Fa , Weiming Liu , Hongbo Pan , Fabin Cao
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引用次数: 0

摘要

传统机械抛光广泛用于制备不锈钢/铝复合板,但长期以来存在粗化效果不均匀、界面附着力差的问题,无法满足现代工业发展对高性能不锈钢/铝复合板的要求。为了解决这一问题,采用电解表面粗化代替传统的电刷粗化对不锈钢进行预处理。经电解表面处理的SS试样在不同的冷轧和退火条件下通过冷轧与铝合金结合。采用剥离实验、硬度测试和微量分析等方法研究了不同样品的界面特征。结果表明:电解处理与轧制预热相结合,在SS表面形成了脆性的表面硬化层和碳扩散层;随着折减率的增加,试样的粘结强度先升高后降低,在折减率为20%时达到峰值。这一趋势归因于轧制变形引起的加工硬化和脆性碳化物在铝合金表面的嵌入/破碎的综合作用。随着退火温度和时间的增加,结合强度先升高后降低,这与原子间扩散增强和金属间化合物(IMC)层形成的共同作用有关。冷轧生产的SS/ Al复合板的最佳加工工艺是500℃退火2 h,然后进行单道次冷轧,减量20%。该工艺在复合板界面处产生高达225 N/mm的粘合剥离强度,这是迄今为止报道的SS/Al复合板的5至6倍。显微结构分析证实了致密、结合良好的界面,裂缝或断裂最小。此外,断口表面呈现出丰富的大小不一的韧窝,仅伴有稀疏的IMC形成,进一步证实了优化后的复合板具有较好的界面完整性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study on the effect of electrolytic surface roughening of a stainless steel plate on the interfacial bonding strength of the stainless steel/aluminum clad plates by the cold roll bonding
Traditional mechanical polishing, widely used for preparing stainless steel (SS)/aluminum clad plates, has long been plagued by uneven coarsening effect and inadequate interfacial adhesion, thereby failing to meet the demands of modern industrial development for high-performance SS/Al clad plates. To address this, electrolytic surface roughening was used as a substitute for conventional brush roughening in the pretreatment of stainless steel. The SS samples treated by electrolytic surface treatment were bonded to aluminum alloy through cold rolling under various cold rolling and annealing conditions. Stripping experiments, hardness testing, and microanalysis techniques were employed to investigate the characteristics of the interface traits of different samples. Results showed that electrolytic treatment combined with rolling preheating induced the formation of a brittle Face-hardened and carbon diffusion layer on the SS surface. The bond strength of the specimens initially increases and then decrease with increasing reduction ratio, peaking at a 20 % reduction. This trend was attributed to the combined effects of work hardening from rolling deformation and the embedding/fragmentation of brittle carbides into the aluminum alloy surface. Increasing the annealing temperature and time causes the bonding strength to firstly increase and then decrease, which is related to the combined effects of enhanced atomic interdiffusion and the formation of an intermetallic compound (IMC) layer. The optimal processing technique for SS/ Al clad plates produced by cold rolling is annealing at 500 °C for 2 h, followed by a single cold rolling pass with 20 % reduction. This process yields a bonding peel strength of up to 225 N/mm at the clad plate interface, which is 5 to 6 times higher values reported for SS/Al clad plates to date. Microstructural analysis confirms a dense, well-bonded interface with minimal cracks or fractures. Furthermore, the fracture surface exhibits abundant dimples of varying sizes, accompanied by only sparse IMC formation, further confirming the superior interfacial integrity of the optimized clad plates.
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来源期刊
Surface & Coatings Technology
Surface & Coatings Technology 工程技术-材料科学:膜
CiteScore
10.00
自引率
11.10%
发文量
921
审稿时长
19 days
期刊介绍: Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.
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