对于铝合金铸件来说,一般的砂型铸造和压铸都要多次倾注液体金属,这就引起千百万个氧化物进入铸件。现在了解,这些小质点是形成针孔的理想核心。另外,这二种方法都不能生产十分精确和不需返修的铸件,砂型铸造要求熟练的工人,而压铸需要大型设备。为此,Coswvth R.和D.公司为保证供应高质量的铝合金铸件,设计了尽可能消 For aluminum alloy castings, common sand casting and die casting have to pour liquid metal several times, which causes millions of oxides into the casting. Now understand that these small particles form the ideal core of pinholes. In addition, neither of these methods produces very precise and repair-free castings, sand casting requires skilled workers, and die-casting requires large equipment. To this end, Coswvth R. and D. companies to ensure the supply of high-quality aluminum alloy castings, designed to eliminate as much as possible