In the recent few years, we have witnessed a considerable improvement in our knowledge of metal casting methods and techniques. With this enhanced understanding, the list of requirements has been consistently corrected as they have become known. Industry experts have identified several rules and practices, which incorporate the latest technology to manufacture quality castings.
The ten rules that have been identified are proposed as essential, but not, of course, adequate. Manufacturers should follow these rules along with the conventional technical specifications, including type of alloys, strength and traceability via quality standards, and other traditional foundry control measures, such as casting temperature, etc.
Though these rules have not been yet tested on all types of cast materials, there are reasons, which suggest that these rules have general validity and are suitable for all types of metals and alloys. The metals and alloys include those based on zinc, aluminum, cast irons, magnesium, steel, air- and vacuum-cast nickel, titanium and cobalt. In spite of all this, experts believe that these rules will probably benefit all metal casting applications, while some applications will be benefited more, others will be less affected.
Formulated to assist the casting manufacturers and designers, these rules are expected to speed up the process of producing the quality castings right the first time and in the significant reduction of scrap when the casting goes into production. Thus, these rules are expected to help the metal casting industry to raise its quality standards without any considerable increase in costs.
While on the other hand, these rules constitute a draft process, which the metal casting buyers may demand if they wish to make sure that they are buying the best possible casting quality. If the buyers ask their casting sources to follow these casting rules, the reliability and quality of castings would be better than what could be achieved by any quality control casting practice.
Rules -
Provide a Good Quality Melt
Avoid Liquid Front Damage
Avoid Arrest of the Liquid Front
Avoid Bubble Damage
Avoid Core Blows
Avoid Shrinkage Damage
Avoid Convection Damage
Plan Segregation Distribution
Control Residual Stress
Provide Location Points
