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

半固态双辊薄带连铸高速生产变形镁合金板材的方法及其温拉深塑性特性

基本信息

批准号：
13650142
负责人：
IZAWA Satoru
金额：
$ 2.18万
依托单位：
Oyama National College of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

项目摘要

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

已经进行了实验方法来确定使用双辊连铸机进行镁合金半固态辊带材铸造的有效性。人们已经认识到，如果半固态材料是轻质生产的，那么半固态成形有助于减轻产品的总重量。然而，使用镁合金的问题仍然主要与高制造成本有关，这意味着质量的提高必须与经济有效性相平衡。在本实验中，镁合金AZ31、AZ91、AM50。和AM60 用于确定适合半固态轧辊带材连铸的温度、上辊和下辊的辊速（可独立改变），以找到合适的冷却效果。 Als … More o，对成品铸件的晶体进行了显微镜观察，发现镁片的厚度为 2.5 至 2.5。 4.0mm厚度可以以25m/min的速度生产，还发现半固态制造工艺生产的热轧铸造镁板可以用于塑性成形。热轧镁合金板的温深冲性能。对半固态轧辊带材连铸工艺进行了研究，以证明 AZ31B 镁合金轧辊带材连铸的可行性。通过改变熔融镁的温度和轧辊速度来找到合适的制造条件。改为研究了哪种条件适合生产变形镁合金板，对所生产的变形镁合金的晶体进行了显微观察，结果发现，在铸造镁的温深拉延过程中，极限拉延比是可能的。半固态轧带连铸工艺后热轧的合金薄板。