进口与国产PS版用铝板组织与性能的对比

Comparison of Properties and Microstructure between Imported and Domestic Aluminium Substrate of PS Plate

应用阳极覆膜、稀酸浸蚀、组织观察和拉伸试验等方法,对PS版用国产热轧带坯、普通铸轧带坯和电磁铸轧带坯制备的铝板与日本进口优质铝板的显微组织与性能进行了比较,分析了生产工艺对铝板组织与性能的影响。结果表明:国产热轧和铸轧铝板的显微组织相似,经中间退火铝板的较未经退火的细小均匀;电磁铸轧及较高的硅、铁含量均可细化组织;国产铝板的组织均匀性较进口铝板的有一定差距;热轧铝板中的FeAl2颗粒细小、分布弥散,较普通铸轧铝板中的易腐蚀;电磁铸轧铝板中FeAl2颗粒的密度和尺寸较普通铸轧铝板的小,分布也更加均匀;铝板的抗拉强度和伸长率受中间退火后冷轧变形量的影响。

The homemade aluminium substrates of PS plate made by hot rolled strip, general casting rolled strip and electromagnetic casting rolled strip were compared with the Al substrate of high quality made in Japan. The effect of process conditions on various properties of aluminium substrate of PS was analyzed by means of weight-loss corrosion testing, anodic film, dilute acid corrosion and tensile test. The results show that the microstructures of homemade substrate by hot rolling and cast-rolling were similar. And the one by hot rolling, whose FeAl2 particles were small and distributed evenly, showed better corrosion properties than the general casting rolled strip. Compared to that made of general cast-rolled strip, FeAl2 particles in the substrate made of electromagnetic casting rolled strip were less, smaller and distributed more evenly. After intermediate annealing tensile properties and elongation of the substrate made of hot rolled strip were influenced evidently by cold rolling redution