Heat-resistant castings are required to be processed materials during operation. Generally, they have good casting performance such as cast iron and aluminum, and their heat-resistant castings can produce zeros with complex shapes. Therefore, they are often used in the manufacture of moulds, such as machine tool shells, for sub-standard parts with low mechanical properties.
The heat treatment of heat-resistant castings is the process by which the workpiece is heated to a certain temperature in the medium for a certain period of time and then cooled at a certain rate so that the structure of the metal can be altered and its properties (including physical, chemical and mechanical properties) altered.Improve the mechanical properties or machining properties of steel.
Purpose of heat - resistant casting
1. Reduce hardness, improve plasticity, and effectively improve the performance of machining and pressure machining.
2. Refine the grain to improve mechanical properties and prepare for the next step.
3. Eliminate internal stress generated by cold and hot processing.
Key points for application of heat-resistant casting
Heat resistant castings are suitable for alloy structural steels, carbon tool steels, alloy tool steels, high speed steels forgings, welds and unqualified raw materials when used.