High Quality Water Valve Impeller Sewage Pump Impeller Submersible Pump Castings，Lingtong Casting have exported Stertil(Holland), LKL(Holland), GE(USA), CAT(USA), RHI(USA), WKM(Japan), UGL(Australia), ABS(Australia), KTH(Australia), Supplylink(Australia), FLOWSERVE(USA), Ruhrpumpen，etc.
Pump Casting Description
Material: Stainless steel (07Cr19Ni9)
Standard: GB/T 2100-2002
Casting process: Sand casting
Weight: 83 KGS
Min. wall thickness: 13mm
Heat treatment method: solution treatment
Surface treatments: shot blasting
Technical Key Points
Ø Control the usage rate of recycled material. When melted in the atmosphere, most of the easily oxidized elements in the material are present in the form of inclusions. Therefore, the amount of inclusions to be taken into account and the usage of recycled material must be controlled. for the stainless steel guide vane, the provisions of the return material amount should be not more than 15%.
Ø Blowing argon to the steel to reduce inclusions. Take 2t ladle as example, when tapping the molten steel, gas pressure should be strictly controlled below 0.1Mpa to prevent the new Oxygen absorption effect, which may be caused by Violent turbulence if the blowing gas is with high pressure. Argon blowing process can effectively reduce oxygen content of the steel by 10% -20%, the effect is very obvious. after tapping of the high temperature molten steel, the steel must be sedated for 5 minutes, thus the gas solubility in steel will reduce and some gas will escape from the steel, carrying the inclusion inside rise to the surface of the steel, thus the steel are cleaned.
Ø Strict contract auditing invloved all departments to assure the feasibility of each order.
Ø Process design and validation before bulk production.
Ø Strictly control on all raw and auxiliary materials, All raw materials reach the world advanced level.
Ø Qualified WPS and professional welders guarantee welding quality.
Ø 100% inspection of finished sprouts before shipment.
Ø Advanced and complete testing and inspection equipment: NDT, metal Microscope, impact tester, hardness tester.
Ø We provide free technical service about casting parts and application issues.
Ø Free on-site touring and introduction of our factory.
Ø We can guarantee on-time delivery of samples and goods.
Ø Close follow-up of all orders by special person and keep customers informed timely.
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