论文部分内容阅读
我厂铸造车间条件差,原材料来源比较困难,基本上使用土焦、土铁和多年积压下来的废铸铁料,其中大部分是浇冒口和铁渣块,经过风吹雨淋,氧化腐蚀严重,又粘附油污、泥砂量大。因此,铸件的废品率高。尤其是在雨季,废品率曾高达34.95％,主要表现为气孔,夹渣、夹砂等缺陷。分析铸件产生缺陷的主要原因,是由于潮湿多锈的炉料、燃料中的水分、过湿的炉气等,皆给合金带来大量的气体,主要是氢气,其次是氧气,严重影响了铸件质量。为了解决这一问题,我们采用包头1~＃稀土合金加入铁水中,使其产生脱硫、除气、净化铁水等作用。稀土的加入量要适当,过多则使
I plant casting workshop conditions are poor, the more difficult sources of raw materials, the basic use of earth coke, soil iron and backlog of iron scrap down for many years, most of which are risers and iron slag blocks, after wind and rain, serious oxidation corrosion , And sticky oil, a large amount of sand. Therefore, the rejection of castings is high. Especially in the rainy season, the rejection rate was as high as 34.95%. The main defects were porosity, slag inclusion and sand inclusion. The main reason for the analysis of casting defects is due to the moist and rusty charge, the fuel in the water, too wet furnace gas, etc., all to the alloy to bring a lot of gas, mainly hydrogen, followed by oxygen, seriously affecting the quality of castings . In order to solve this problem, we use Baotou 1 ~ # rare earth alloy added to the molten iron, making it produce desulfurization, degassing, such as the role of purification of molten iron. Rare earth added to be appropriate, too much is used