Casting Process Design of Low Alloy Wear-resistant Steel Slurry Pump Body

    
    Slurry pumps are widely used in many industrial fields and the casting process of its pumping bodies is the key part with several quality requirements of low alloy wear resistant steel.
    
    The design process for the casting of low alloy wear resistant steel slurry pump body starts from creating a 3-D solid model, which is then used as a reference for creating the 2-D process design drawings. First, the CAD drawings of an optimized design are derived from the solid model with associated essential dimensions and suitable tolerances for all parameters. Designing a pouring system of a desired shape is done with rigorous attention to pouring angles, gate and riser shapes, sizes and locations taking in account the thermodynamic and mechanical requirements of the casting process and the material to be poured. Another important factor considered while designing the pouring system is the chilling effect it may produce.
    
    The casting of the slurry pump body requires precise calculations and considerations of various physical and thermodynamic processes. Heat Transfer and Stress Forcings, being the most important components of the casting process, also need to be incorporated into the design. Different slurries have different physical and chemical properties that can influence the casting process which should be taken into account during the design process. Material selection is also imperative since the low alloy wear resistant steel is used for producing slurry pumps for applications with varying corrosive environments.
    
    Finally the designed drawings are presented to the customer for approval and then the casting process is begun. The example of the casting process design model of a low alloy wear resistant steel slurry pump body given in the figure.
    
    The figure shows that slurry pump body is produced by a lost wax investment casting process. The model is fixed in the flask container filled with specially made ceramic mixture to be hardened in the set duration. In stage 2 molten low alloy wear resistant steel is poured in the center of the flask container with the investment mould creating the required shape in stage 3. After chill down the model is broken from the casting to remove entrapped silica from the body surface in stage 4. The body dimension will be machined later in stages 6 and 7 before polishing in the final stage.
    
    Overall, the casting process design for a low alloy wear resistant steel slurry pump body is a complex task involving several calculations and considerations about materials and thermodynamic processes. Exchange of information between customer, manufacturer and process design team is important for successful productions since the different components of the casting process must be well integrated to achieve desired results.

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