去年我厂接受了一批255立方公尺高炉的制造任务,其中铸造方面的关键件是风口铜套。铜套是用锡青铜铸成,成分是:铜在97.8%以上,锡少于1.5%。铜套铸好后要进行水压试验,要求能受8个大气压力保证不漏水。而铸件的皮厚只有8公厘。根据外厂的经验,用砂型铸造铜套废品率一般高达50%;用金属型铸造虽然可以保征质量,但是制造金属型周期很长,而我们的任务又紧,因此只好另想别的 Last year, our factory accepted a batch of manufacturing tasks of 255 cubic meters of blast furnace, among which the key part in casting was tuyere copper sleeve. Copper sleeve is cast with tin bronze, the composition is: copper is above 97.8%, tin is less than 1.5%. After the copper sleeve is cast, a hydrostatic test is required to ensure that it can withstand 8 atmospheric pressures without leaking. The cast skin thickness only 8 mm. According to the experience of the outside plant, the rate of rejects made of sand cast bronze sets is generally as high as 50%. Although metal castings can guarantee the quality, the manufacturing cycle is very long and our task is tight, so we have to think of something else