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How to clean stainless steel pump castings surface?
- Feb 06, 2018 -

Stainless steel pump castings just after forming, the need for a reasonable surface cleaning to remove some of the above undesirable phenomena, making the casting surface to achieve the desired state, suitable for stainless steel pump castings cleaning there are two main ways.

 

One is dry cleaning, that is, stainless steel pump castings shot blasting, compressed air as a motive force, the projectile at about 50m / s or so spray speed to the surface of the workpiece, remove the precision casting surface of the sticky sand or iron oxide scale . Although the friction cleaning can also have some effect, but because of its low efficiency, poor results and other drawbacks rarely used in stainless steel pump casting.

 

The other is of course wet cleaning, stainless steel pump castings surface treatment when wet treatment techniques are many, more commonly used is electro-hydraulic sand, the use of high-voltage pulse generator placed in the water by a special electrode for phase discharge, Produce large hydraulic impact. Due to precision casting surface adhesion and the casting itself elastic modulus and vibration frequency is different, so as to achieve the purpose of clear sand. For the shape of the complex stainless steel pump castings, the effect is more pronounced.

 

In the large-scale stainless steel pump castings clean-up, the use should be hydraulic sand, high-pressure water pump input high-pressure water through the nozzle nozzle to form a high-pressure jet, firing sand and sand casting core surface to sand, so as to achieve The purpose of cleaning up

 

In addition, the surface of the stainless steel pump castings can also be treated with water-purifying sand. The molten stainless steel pump casting with a certain temperature is put into the water tank directly. The water entering the hot sand mold and the sand core is heated and vaporized, Of the vaporization and steam continue to be heated, the pressure is increasing, the sand and sand core collapse and fall off from the casting surface and the cavity.

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