Why White Corundum is "Precision Casting Sand"
Release date: 2019-09-05 Views: Article source: Henan Ruishi Group
The sieved white corundum can be used for grinding and polishing, for the production of consolidated abrasives, as a refractory, and as a food additive. Of course, it can also be used for precision casting. It will be called precision casting sand.
Why should white corundum be used for precision casting sand? Mainly because white corundum has the following advantages in casting:
1. The shell type in which white corundum participates in production, its thermochemical properties are stable, its fluidity is high, and the problem of layer formation will not occur;
2.White corundum has high strength, low gas generation, low expansion coefficient, and will not expand and crack under high temperature conditions;
3. White corundum sand itself is resistant to high temperatures. Not only is it good for mold release, but it also has good anti-stick sand properties, and the shell layer will not be shelled and the curing speed will be fast.
4, white corundum is used for casting, and its scatter is good, and the surface of the casting can meet the requirements whether it is smooth or flat;
White corundum is still widely used in precision casting. It is a commonly used investment casting shell material such as alloy castings, core surface sands, coatings, and can even replace the existence of zircon sand to a certain extent.
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