鑄鋁合金真空精煉除气

• 作 者: 謝清泉
• 出 处: 上海机械
• 发表日期: 1965年03期
• 关键词: 真空精炼 溶解度

一、鑄鋁合金除气鑄鋁合金中气孔的生成原因及其防止方法,国外是在1925年提出的。在当时的研究报告中指出,合金凝固时气体聚成是由于气体溶解度的降低所致。为了防止鑄件产生气孔,应尽量排出发生的气体,或者强迫合金迅速冷凝,使气孔来不及生成。根据这个途徑,世界各国創造了很多鑄鋁合金的除气方法,如1928年提出的通入氯气排气方法、1930年发表的氯盐处理法、1936年提出的添加熔剂(KCl_5,NaCl_4,NaF)除气法

First, the aluminum alloy die-casting aluminum alloy in the formation of pores and prevention methods, abroad was proposed in 1925. In the research report at that time, it was pointed out that the gas polymerization during the solidification of the alloy was caused by the decrease of gas solubility. In order to prevent the casting porosity, should exhaust as much gas as possible, or force the alloy to condense rapidly, so that the stoma can not generate too much time. According to this approach, many countries in the world have created a lot of outgassing methods for cast aluminum alloys, such as the chlorine gas venting method proposed in 1928, the chloride salt treatment method published in 1930, the flux addition method proposed in 1936 (KCl_5, NaCl_4, NaF Gas removal method