Explore practical guides on investment casting design, material selection, defect prevention, CNC machining and quality control.
Learn how metal castability affects investment casting defects such as misruns, cold shuts, shrinkage, gas porosity, and cracking.
Investment casting design guidelines help engineers review wall thickness, holes, radii, flat surfaces, machining allowance, and wax pattern tooling before production begins. This article explains how part geometry affects castability, tooling cost, dimensional stability, and post-casting machining. It also shows when features should be cast directly, machined after casting, or reviewed with ceramic cores or 3D printed patterns for better manufacturing results.
Slag holes and shrinkage holes are very common defects in precision castings. The causes of these defects are multifaceted, mainly related to the smelting of molten steel, the cleanliness of recycled wax and the tree assembly process.1.1 Molten steel smelting: Although it only takes 20-30 minutes to
Cracks are the most destructive defects in precision castings. Cracks are not allowed in all precision casting acceptance standards. Most of the precision castings are hot cracks, and cold cracks are relatively rare.All cracks are caused by internal stress in the casting. When the internal stress of
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