The casting temperature is too low or too low. What are the differences and what casting defects are produced?
The casting theory is high temperature baking and low temperature casting.The casting temperature is too high to form a sand inclusion and a sintering hole. It also increases freezing time and shrinkage.Pouring temperature is too low, mainly forming, casting non forming, on the fire.
Too high temperature pouring easy to cause defects: sand, iron sand, shrinkage, shrinkage, hot cracking, running fire, local oxidation, size failure, reactive porosity and so on.Too low temperature pouring easy to cause defects: insufficient pouring, cold separation, transition fillet is too large, slag inclusion, sand inclusion, precipitation porosity, and so on.
The casting department must pay attention to three points: 1, qualified chemical composition; 2, the purity of molten iron; 3, appropriate liquidity.The basic way to solve is: 1, high temperature baked for postprocessing to prepare for adjusting the chemical composition of a certain temperature set aside space; the rest time, can get pure molten iron 2, water, and avoid segregation.
