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How to clean stainless steel casting surfaces
Dry class cleaning method is mainly blasting process of friction surface treatment of stainless steel casting to clean, blasting process simple said is powered by compressed air, make the projectile at a certain speed sprayed onto the surface of the stainless steel castings, with sand and iron oxide on the surface of the clear, but the friction cleaning method because of the low efficiency, poor cleaning effect of uneven, reason, has been adopted by created in the factory, has almost been eliminated.
The wet reason method is mainly based on the principle of electro-hydraulic hammer effect. The high voltage pulse generator is discharged alternately through the special electrode placed in the water to generate large hydraulic impact. Because the surface adhesion of stainless steel casting is different from the elastic modulus and vibration frequency of the casting, the purpose of sand cleaning is achieved. For stainless steel castings with complex shape, such as deep hole, blind hole and inner cavity, it has a more effective cleaning effect. It is the most widely used surface cleaning method for a series of stainless steel castings.
Stainless steel can be divided into austenitic stainless steel, martensite stainless steel and ferrite stainless steel according to its structure. Of austenitic stainless steel is a kind of stainless steel, the usage is the biggest structure of austenitic stainless steel in theory there is no magnetic, but the austenitic stainless steel after cold working can produce magnetic, according to some studies show that both at home and abroad, the cause of austenitic stainless steel castings with magnetic is in the process of machining when heated to a temperature of austenitic stainless steel transition temperature above and keep after a period of time, turns into austenitic stainless steel, but then need stainless steel casting cooling molding, in the process of rapid cooling, when cool austenite to martensite transformation temperature, its organization began to turn into martensite, The transition will not stop until the temperature drops below the transition temperature at which the martensite structure is formed. In the production of stainless steel casting, the stability of austenitic stainless steel, the amount of deformation and the processing method may affect its transformation into martensite stainless steel.
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