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我厂用ZL—102合金压铸生产发动机叶尾的垫板,投产多年来,铸件表面存在流痕和冷隔以及气泡等内部缺陷始终没有克服,合格率只达50～60％。以前认为这是由于厚壁另件不适宜用压铸生产,它的“壁厚效应”很突出的缘故。通过改进浇注系统,增大比压,降低压铸速度,以及合理的压铸温度,上述问题都得到了解决。具体的工艺试验是在Y—100A型卧式压铸机(压射力12吨、射程290毫米)上进行的。我们们改进了压射系统,安装了“压速测示
I plant with ZL-102 alloy die-casting production of the engine tail pad, put into production over the years, there are flow marks on the surface of the cast and cold and air bubbles and other internal defects have not been overcome, the passing rate of only 50 to 60%. In the past that this is due to thick-walled parts are not suitable for die-casting production, its “wall thickness effect” is very prominent reason. The above problems have been solved by improving the casting system, increasing the specific pressure, reducing the casting speed and reasonable casting temperature. The specific process test was carried out on a Y-100A horizontal die-casting machine (12-ton injection pressure, 290 mm range). We have improved the injection system, installed "pressure test