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Functional requirements and heat treatment process for pump and valve castings

Aug 21, 2018

The surface treatment of the pump valve casting is a process for artificially forming a surface layer of a substrate and a mechanical, physical and chemical property of the substrate. The surface treatment is for the purpose of satisfying the corrosion resistance, wear resistance, decoration or Other special function requirements. For metal castings, our more common surface treatment methods are: mechanical grinding, chemical treatment, surface heat treatment, spray surface, surface treatment is to clean, clean, deburr, degrease, deoxidize the surface of the workpiece.

The solution treatment of the pump valve castings mainly refers to the heat treatment process of heating the alloy to a high temperature single-phase zone constant temperature, so that the excess phase is sufficiently dissolved into the solid solution and then rapidly cooled to obtain a supersaturated solid solution. Solid solution can obtain a solid solution structure with uniform composition, and the workpiece can be quenched by rapid cooling to a lower temperature to obtain a saturated single-phase solid solution.

Pump valve castings mainly improve the plasticity and toughness of steel and alloys, and prepare for precipitation hardening treatment. The various phases in the alloy are fully dissolved, the solid solution is strengthened, and the toughness and corrosion resistance are improved, and the stress and softening are eliminated to continue processing or molding.http://www.pump-casting.com/