论文部分内容阅读
我厂配制的稀土硅铁镁中间合金,原来直接浇注在槽钢中。但浇注后槽钢很快变红,镁的烧损严重,而且一块槽钢反复使用十多次后,因变形或烧穿很快就损坏了。为次,我们设计制造了一种结构简单的水冷浇注槽(见图)。它由一段25号工字钢和一块10毫米厚钢板焊接而成。合金浇在上部槽子里,下部通水冷却。采用这一措施后,收到很好效果: 1.增大冷却速度,降低了镁的烧损。镁含量由原来的5％提高到7％以上,从而降低了球化处理时的加入量,且球化稳定。 2.浇出的合金致密,偏析减少,质硬而脆,易于破碎。 3.改善了劳动条件。原来浇注时镁光,烟尘较大,改进后基本上无镁光和烟尘。 4.节约了钢材。原来每月要消耗25号槽
I plant preparation of rare earth ferrosilicon master alloy, the original direct casting in the channel. However, after pouring the channel quickly turns red, the magnesium burns seriously, and a channel is repeatedly used for more than ten times, it is damaged quickly due to deformation or burn-through. For the second time, we designed and manufactured a simple structure of water-cooled pouring tank (see photo). It is made of a 25-gauge I-beam and a 10-mm thick steel plate. Alloy poured in the upper tank, the lower part of the water cooling. After using this measure, it received good results: 1. Increase the cooling rate, reducing the burning of magnesium. Magnesium content from the original 5% to 7% or more, thereby reducing the amount of balling when added, and the ball stability. 2. Casting the alloy dense, segregation reduced, hard and brittle, easy to break. 3. Improved working conditions. Magnesium when the original pouring, smoke larger, basically improved magnesium-free light and smoke and dust. 4. Save the steel. The original monthly consumption of 25 slots