Industrial Metallographic Microscope for Characteristic Identification of Workpiece and Casting Materials!
The properties of casting materials, such as strength, toughness, magnetism, corrosiveness, and other mechanical, physical, and chemical properties, are usually determined by their internal structure (including atoms and their binding with neighboring atoms in the lattice, molecules, microstructure, grain shape and size, etc.), and these properties are manifested in the role/function of castings during use (such as high-strength castings, quick cut castings, corrosion-resistant castings, heat-resistant castings, wear-resistant castings, etc.). To manufacture and utilize castings, it is necessary to understand their structure, and casting materials must be processed for special purposes to meet the design requirements of castings. To improve performance, appropriate changes must be made to its internal organization. If the processing method changes the organization, the material's properties will also change accordingly. During the manufacturing process, changing the internal structure of the casting will also affect the properties of the material and its intended use. Heat treatment is a typical application of this.
Based on the above explanation, the definition of heat treatment for castings can be as follows:
Castings undergo controlled heating, holding, and cooling processes to alter the internal structure of their material, in order to enhance their mechanical properties or achieve special purposes. The relationship between the heating rate, holding temperature, holding time, and cooling rate of castings can be obtained through heat treatment to achieve the desired properties of castings. Any heat treatment schedule foundation includes the following four basic considerations:
1, Heating rate
2, Choose appropriate temperature maintenance
3, The holding time for maintaining temperature
4, Cooling rate
