-
Heat Treatment of Carbon Steel Castings and Medium- and Low-Alloy Steel Castings
Heat Treatment of Carbon Steel Castings Common heat treatment methods for carbon steel castings include annealing, normalizing, or normalizing + tempering. Normalized cast steel exhibits slightly higher mechanical properties than annealed steel. Due to the greater degree...Read more -
Design of Cores
The core is an important part of the mold. Its function is to form the inner cavity and holes of the casting, to shape undercuts, and to produce parts of the mold that have special requirements. A core should meet the following requirements: the shape, dimensions, and po...Read more -
Application of Chills
A chill is one of the most commonly used metal blocks for controlling the solidification of castings. Chills can be used for all types of casting alloys, but they are most widely applied in steel castings. The main functions of chills are as follows: 1. Used together wit...Read more -
Filling Ability of Liquid Metal
Concept of Filling Ability of Liquid Metal (1) Filling Ability of Liquid Metal The ability of liquid metal to completely fill the mold cavity and form a casting with complete shape and clear contours is referred to as the filling ability of liquid metal. In most c...Read more -
Lost Foam Casting
Lost foam casting, also known as full mold casting, is a casting process in which a foam pattern coated with a refractory material is placed into a sand mold. Dry sand is then compacted around the pattern. During pouring, the high-temperature molten metal causes the foam...Read more -
Formation and Prevention of Pores in Cast Iron Castings
The existence of pores in cast iron castings not only reduces the effective cross-sectional area of the cast iron parts, but also causes stress concentration around the pores, becoming the source of cracks in the material fracture. The most serious is that the pores are ...Read more -
Growth of Cast Iron
When cast iron components operate at high temperatures, they may undergo an irreversible dimensional expansion known as growth. This phenomenon not only reduces the strength of the cast iron but can also damage other components in contact with it. Cast iron growth is mos...Read more -
Internal Defect Inspection of Castings – Radiographic Testing
Internal defects of castings refer to various defects that exist inside castings and destroy the density or uniformity of castings, such as internal shrinkage, shrinkage, pinholes, pores, inclusions, internal cracks, segregation, etc. For these defects that are not expos...Read more -
Common Methods for Testing and Sampling Mechanical Properties of Castings
The mechanical properties of castings are important indicators of the quality of most castings and are often used as the basis for acceptance. However, it is very difficult and usually impossible to apply the same load to the castings as the working conditions to measure...Read more -
Gray Cast Iron Performance – Service Properties
Machines operating under different conditions require gray cast iron components to have service properties that cannot simply be characterized by conventional mechanical properties. Designers and manufacturers must give this due attention. Wear Resistance Gray cas...Read more -
Gray Cast Iron Performance – Mechanical Properties
The mechanical property data of gray cast iron is generally obtained from separately cast ⌀30mm test bars. Since the microstructure and mechanical properties of gray cast iron are significantly affected by the cooling rate during the solidification and eutectoid transfor...Read more -
Coating for Moulds in Foundry Casting
To enhance the mould' s resistance to molten metal, reduce the surface roughness of the casting, prevent sand adhesion, and improve the surface quality of the casting, a special mixture is applied to the working surface of the mould. This mixture is known as mould coatin...Read more
