Big and medium size of the liners It is essential to preheat and even temperature operation of the lining plate, directly related to the toughness of the lining plate. The quenching process includes expanding preheating and homogenizing. In this process, the influence of thermal stress and microstructure stress should be considered. This two types of […]
Abstract: The lining plate is an essential part of the composition of the machinery and equipment on the mine. In the production of the ore, it needs to be in direct contact with the ore material. After being subjected to a lot of pressure and wear, it can also maintain its original quality and performance […]
1) when non-ferro alloy is melted, charge, solvent, tool and ladle should be preheated and dried fully, rust and oil should be removed, and the amount of charge should be properly limited.
Click here casting production, casting gas porosity, and casting shrinkage cavity are sometimes associated, sometimes in separate groups. When gas porosity and shrinkage cavity occur, we quickly determine whether the defect is a gas porosity or a shrinkage cavity is necessary to solve the problem. To quickly judge these two defects, you know their characteristics well at first. Today, we teach you […]
Casting is the process of melting the metal into a required liquid and pouring it into the mold. After cooling, solidifying and cleaning, a casting (part or blank) with a predetermined shape, size and properties can be obtained It is the basic technology of modern machinery manufacturing industry. The cost of casting blank is low, […]
EUTECTIC TRANSFORMATION OF NODULAR CAST IRON The eutectic transformation of spheroidal graphite cast iron is not as obvious as that of gray iron, although graphite is first precipitated and austenite is then precipitated, graphite plays a less dominant role in the Eutectic Solidification process coexisting and coexisting under conditions of common and liquid contact.
Morphology of primary AUSTENITE DENDRITE The Crystal Lattice of austenite is face-centered cubic. When the AUSTENITE is nucleated and grown directly from the liquid iron, the AUSTENITE is stable only when the surface energy is minimum and octahedral crystal is formed. Then, because the concentration gradient of solute in the liquid iron at the edge […]
Second. Primary AUSTENITE DENDRITE IN CAST IRON Due to the mechanical properties, Gray cast iron is usually hypoeutectic, and there will be primary austenite dendrite in solidification structure. Under the condition of special properties of cast iron (such as high thermal conductivity and good shock absorption), gray cast iron with near Eutectic or hypereutectic composition […]