Abstract: With three-step method “surface process + cold rolling bonding + annealing treatment", i. e. first, treating the surface of 4mm 08 Al steel strip (/% : 0. 01G, 0. 018A1) and 0.23 mm 4A60 aluminium strip by brushing, then single pass-rolled by 60% reduction for the aluminium-steel strip using high precision Φ420 mm four high rolling mill with 30 kN forward tension to get large deformation cladding, and annealing treatment at 520 ℃ for 24 h in a bell type annealing furnace, the cold-rolled 1. 7 mm 4A60 aluminium-08Al steel cladding strip with 80 〜90 μm extra-thin cladding layer is developed. The microstructure of 08Al steel in cladding strip is equiaxed ferrite with average grain size 15 μm, its tensile strength ≥320MPa and elongation ≥28%, and the bending properties of cladding strip also meet the requirement of standard. The intermetallic compound is not found in aluminum-steel interface region of cladding strip brazed at (600 ± 10) ℃, and the delamination phenomenon is not observed at interface of aluminium and steel.

摘要： 通过"表面处理+冷轧复合+退火处理"三步法,即先采用钢丝刷对4 mm 08Al钢(/%:0.01C,0.018Al)和0.23 mm 4A60铝带表面进行处理,然后在前张力30 kN下利用高精度Φ420 mm四辊轧机对铝-钢进行60%的单道次冷轧复合,并于罩式退火炉进行520℃24 h的退火处理,开发出了极薄复层(80~90μm)冷轧4A60铝/08Al钢1.7 mm复合带材。复合带材中08Al钢的组织为平均晶粒尺寸15μm的等轴铁素体,抗拉强度≥320MPa,伸长率≥28%,弯曲性能也符合指标要求。复合带材在(600±10) ℃ 钎焊后铝钢界面未发现金属间化合物,铝钢界面未发现分层现象。

关键词: 铝-钢复合带材, 冷轧复合, 嵌入式, 力学性能, 结合性能