Design requirements and material selection of wear-resistant castings

- May 26, 2018-

In the process of making wear-resistant castings, only by standardizing the die design of squeeze casting can they be developed faster and better. After the wear-resistant castings are removed from the cast mold with cooling casting, there are gates, risers, metal burrs, The sand casting still adheres to the sand, so it must go through the cleaning process. The equipment for this kind of work is a polishing machine, a shot blasting machine, a riser cutting machine and so on.


In selecting the molding method of wear-resistant castings, to a certain extent, it is necessary to consider as far as possible the convenient conditions for sand removal. Some castings, due to special requirements, have to undergo post-treatment of castings, such as heat treatment, shaping, rust prevention, etc. Rough work, etc Casting process can be divided into three basic parts, namely, casting metal preparation, casting preparation and casting processing.


The casting metal of wear-resistant castings mainly refers to the metal materials used to cast castings effectively in the process of casting production, and the main component in operation is a kind of metal element. To a certain extent, alloys consisting of other metals or non-metallic elements, usually called casting alloys, mainly cast iron, cast steel, and cast nonferrous alloys.


In the design process of wear-resistant castings, in addition to the design, it is necessary to effectively determine the geometry and size of cast iron according to its working conditions and the properties of metal materials. In order to avoid or reduce the component segregation and deformation of cast iron, the rationality of the design must be considered from the angle of casting alloy and casting process characteristics, that is, obvious size effect, solidification, shrinkage, stress, etc. The production of defects such as cracking.


Hard steel, high manganese steel, chromium steel, alloy cast iron, rubber and magnetic lining board can be used as lining materials for wear-resistant castings. High manganese steel has sufficient impact toughness, and the surface is cold hardened and hard and wear-resistant when it is subjected to a certain impact. Therefore, high manganese steel is widely used to manufacture wear-resistant castings liner.