Hard spots from impure gold can compromise surface quality and generate defects that are difficult to eliminate during finishing. This case study explains how trace contaminants in lower-purity gold can form hard intermetallic compounds and affect casting performance. Read the full analysis to discover how to prevent these costly defects.
Welding tie adhesion can create unwanted bonds between holding wires and the parts being welded, leading to surface damage and additional finishing work. This case study explains the diffusion mechanisms behind the defect and how proper material selection can prevent it. Read the full analysis to learn more.
The comet effect hard spots defect appears after finishing and is often linked to contamination or incompatible alloy additions. This case study explains how Silicon and Iridium interactions can generate hard spots and characteristic comet-tail marks on the surface. Read the full analysis to discover how to prevent this issue.
Gold alloy color variation can occur even when the alloy composition remains within specification. This case study explains how surface oxidation during torch melting can alter the distribution of alloying elements and create noticeable color differences in the finished product. Read the full analysis to discover how to prevent this issue.
Plaster calcination casting defects can arise when the burnout cycle is not performed correctly, leading to reactions between metal and investment material. This case study explains how inadequate calcination can generate inclusions and surface defects that compromise stone setting quality. Read the full analysis to discover the best prevention methods.
Casting plaster flaking can cause severe surface porosity and compromise the quality of cast components. This case study explains how inadequate investment strength and centrifugal casting conditions can lead to plaster detachment during mold filling. Read the full analysis to learn how to prevent these defects.
Graphite inclusions in continuous casting can seriously reduce the mechanical performance of precious metal profiles and lead to unexpected fractures during deformation. This case study explains how worn graphite components and machine downtime can introduce carbon-based contaminants into the alloy. Read the full analysis to learn how to prevent these failures.
Gas porosity in investment casting is a common defect that can compromise the quality and appearance of cast components. This case study explains the main causes, from residual wax and investment reactions to inadequate vacuum performance, and provides practical solutions to reduce porosity. Read the full analysis to learn more.
White gold pickling corrosion can occur when alloy contamination or compositional inhomogeneity makes certain areas more vulnerable to acid attack. This case study explains how impurities, oxides and uneven element distribution can cause discoloration and localized corrosion after pickling. Read the full analysis to learn how to prevent these defects.