1. Common defects and preventive measures in the use of resin sand 1.1 Generation and preventive measures of pores During the solidification process of metal, bubbles trapped in the molten metal form holes in the casting, which are called pores. By observing the shape of the holes, the characteristics of the hole wall, the surface […]
Solutions for Issues in Furan Resin Sand Casting Leer más »
If furan resin self-hardening sand is used improperly, casting defects such as pores, mechanical sand sticking, and mold sticking often occur. 1. Generation and prevention measures of pores During metal solidification, trapped bubbles form pores in the casting. The shape, wall characteristics, surface texture, and location of pores help distinguish them from shrinkage, sand holes,
Common defects and preventive measures in the use of resin sand Leer más »
1. Material selection and quality Raw materials: The main production materials of cast iron are pig iron and recycled materials. Pig iron is usually obtained by smelting in a blast furnace, while recycled materials mainly come from the pouring system and scrap iron parts. The quality of these raw materials directly affects the final quality
What does the manufacturing process of cast iron include? Leer más »
Aging treatment of machine tool castings is an important part of the casting process. It aims to eliminate residual stress inside the castings through a series of measures, stabilize their size and organizational structure, and thus improve the mechanical properties and service life of the castings. The following is a detailed analysis of aging treatment
Why do machine tool castings need aging treatment? Leer más »
Ductile iron, known for its excellent strength and toughness, undergoes various heat treatment methods to enhance its mechanical properties. Common techniques include annealing, normalizing, and tempering. Annealing helps to reduce stress and improve ductility by decomposing cementite, while normalizing refines the microstructure by controlling cooling rates. Tempering is often applied after quenching to relieve internal
Heat treatment methods for ductile iron Leer más »
During casting, the curing agent (or hardener) promotes bonding and curing of molding sand, ensuring the sand mold has sufficient strength, stability, and heat resistance for molten metal pouring. 1. Forming a solid sand mold The curing agent can react chemically with the binder in the molding sand to form a solid sand mold. This
The role of curing agent in molding sand Leer más »
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