High speed production method of wrought magnesium alloy sheets using semi-solid twin roll strip casting and its plastic characteristics in warm deep drawing

采用双辊铸轧机进行了镁合金半固态薄带连铸的实验研究。人们已经认识到，如果轻金属生产的半固态材料可以用来代替传统的钢铁产品，半固态成形有助于减轻产品的总重量。然而，利用镁合金的问题仍然主要与高制造成本有关。这意味着提高质量必须与经济有效性相平衡。本实验采用AZ 31、AZ 91、AM 50和AM 60镁合金，以确定哪种镁合金适合用于半固态铸轧薄带。改变熔融材料的温度、上辊和下辊的辊速（它们可以独立地改变）以找到合适的制造条件。从熔体与轧辊的接触条件出发，阐明了冷却条件和接触条件对可能成形的影响。Als ...更多信息 因此，对成品铸件的晶体进行了显微镜观察。结果表明，在25 m/min的速度下，可以生产出厚度为2.5 ~ 4.0mm的镁合金薄板，半固态工艺生产的热轧镁合金薄板可以用于塑性成形。为了验证AZ 31 B镁合金铸轧薄带的可行性，对固态铸轧薄带工艺进行了研究。改变熔融镁的温度和辊速度以找到合适的制造条件。改变热轧和热处理条件，以检查哪种条件适合于生产变形镁合金板。对所生产的变形镁合金的晶体进行显微镜观察。已经发现，在半固态辊带铸造工艺之后热轧的铸造镁合金板的温深拉工艺中，2.7的极限拉伸比是可能的。少

An experimental approach has been performed to ascertain the effectiveness of semi-solid roll strip casting of magnesium alloys using a twin roll caster. It has been recognized that semi-solid forming contributes to lightening the total product weight if semi-solid material produced by light metals can be used to replace conventional iron and steel products. However, the problems of utilizing magnesium alloys are still mainly related high manufacturing cost. This means that improved quality must be balanced by economic validity In this experiment, magnesium alloy AZ31, AZ91, AM50 and AM60 were used to determine which were appropriate for use in semi-solid roll strip casting. Temperature of the molten materials, roll speeds at upper and lower rolls, which could be changed independently, were varied to find an appropriate manufacturing condition. Effects of cooling and contact condition on possible forming were clarified in terms of contact condition between molten material and roll. Als … More o, microscopic observation of the crystals of the finished casting has been performed. It has been found that magnesium sheet with 2.5 to 4.0mm thickness could be produced at a speed of 25m/min. It also found that the hot rolled cast magnesium sheets produced by semi-solid manufacturing process could be used for plastic forming.Warm deep drawability of magnesium alloy sheets that were hot-rolled after a semi-solid roll strip casting process was investigated to demonstrate the feasibility of roll strip casting of AZ31B magnesium alloy. The temperature of the molten magnesium, and the roll speeds were varied to find appropriate manufacturing conditions. Hot rolling and heat treatment conditions were changed to examine which condition would be appropriate for producing wrought magnesium alloys sheets. Microscopic observation of the crystals of the produced wrought magnesium alloys was performed. It has been found that a limiting drawing ratio of 2.7 was possible in the warm deep drawing process of the cast magnesium alloy sheets that were hot-rolled after a semi-solid roll strip casting process. Less