论文部分内容阅读
一、前言 铝合金铸件,特别是形状复杂,壁厚不均的铸件,常有产生疏松的可能,甚至很难排除。海绵状疏松是铸件的主要缺陷之一,它的存在无疑将引起铸件机械性能的降低。如果能控制在一定程度之内,铸件的性能仍能满足设计和使用的要求,从而提高铸件的成品率,收到明显的经济效益。 该课题参照了美国ASTME155标准,选用了ZL101合金(相当美国的356.0合金),采用两种厚度,第一组厚度为6毫米,第二
First, the preface Aluminum alloy castings, especially the shape of complex, uneven wall thickness castings, often have the possibility of loose, and even difficult to rule out. Sponge-like loose is one of the main defects of the casting, its existence will undoubtedly lead to the reduction of the mechanical properties of the casting. If you can control to a certain extent, the performance of the casting can still meet the design and use requirements, thereby increasing the casting yield, received significant economic benefits. The subject reference to the United States ASTME155 standard, the choice of ZL101 alloy (equivalent to the United States 356.0 alloy), the use of two thickness, the first group of 6 mm thickness, the second