Casting sand holes: 1. The mold has fell into the sand. 2. Low coating strength, poor refractory, yield to the scour of high temperature metal liquid, sand were involved in casting. Blow hole: the cause of many, one of the most common is because there are multiple broad-minded cast in the material, gas speed, coating or by sand permeability is poor, caused by gas are not ruled out in time.
for ships. Because the titanium and titanium alloy in seawater has more excellent than other alloy corrosion resistant performance, compared with the commonly used copper alloy and high strength, low density, can increase the water flow velocity through the thin wall thickness reduction and to ensure that the heat transfer efficiency.