The casting surface properties formed by the titanium flange casting process depend on the ability of the liquid titanium to replicate the surface profile of the mold (roughness, clarity, mechanical sand, etc.) and the formation of macroscopic roughness (cold separation, flow marks, surface holes, Inclusions and wrinkles, etc.), as well as the tendency of liquid titanium to react with the mold (cast scar, a stained layer, chemical sticky sand, etc.).
Titanium flange casting casting surface quality is measured by surface roughness and macroscopic roughness. The surface roughness is the degree of ruggedness of the surface profile of the casting, measured in microns, usually as well as Ra and Rz. The macroscopic roughness of the casting refers to the visible curvature of the macroscopic and concave parts, such as cold septum, flow marks, cracks, surface pores and inclusions, which appear on the surface of the casting.
Easy to form flow marks and cold separation is one of the characteristics of titanium flange castings. Another important measure of the surface quality of titanium flange castings is the thickness of a stained layer, which is directly related to the subsequent use of the casting.
Titanium flange casting casting process to form the characteristics of the casting surface characteristics of the factors described below.
The surface quality of the titanium flange castings depends to a large extent on the quality and roughness of the mold surface and the thermal chemical stability. The larger the particle size of the cast material, the greater the roughness of the casting surface. The surface roughness of the cast and the thermal conductivity and the wettability of the molten titanium to the mold, and the casting in the pre-cast state, the titanium flange casting surface quality has a greater impact.