我厂生产的6105Q缸盖由于在涡流室、螺栓孔等较厚的地方出现缩松漏水,曾一度报废惊人,后于1981年下半年使用了碲粉涂料工艺。经过几年来的生产实践证明,碲粉涂料确实具有消除缩松、疏松缺陷,使铸件厚壁部分组织致密等功能,在某些地方完全可以代替冷铁。但我们也发现有促进白口,产生针孔等副作用。 6105Q cylinder head produced by our factory has been abandoned for a long time due to shrinkage leaking in thick places such as vortex chamber and bolt hole. Later, in the second half of 1981, the technology of tellurium powder coating was used. After several years of production practice has proved that tellurium powder coating does have to eliminate shrinkage, loose defects, thick parts of the casting wall and other functions, in some places can completely replace the cold iron. However, we also found that there are side effects such as promoting whiteheads and pinholes.