一、问题的提出及补救工艺设想1975年以前,本厂有一种冷却器,组装胀管后,常常由于铜合金管板(材料牌号为ZHSi80—3—3)缩松,试水压时出现渗漏而大批报废。针对这个问题,我们一方面研究铸造工艺,避免管板缩松,另一方面,对已渗漏的铜冷却器及管板设法进行补救。 First, the problem raised and remedy Process imagination Before 1975, the factory has a cooler, after the expansion tube assembly, often due to copper alloy tube plate (material grade ZHSi80-3-3) shrinkage, seepage pressure when the test seepage Leakage and a large number of scrapped. In response to this problem, we have studied the casting process on the one hand to avoid tube sheet shrinkage and on the other hand, we have tried to remedy the seepage of copper coolers and tube sheets.