Titanium castings can be divided into α alloy, near α alloy, α + β alloy and β alloy according to the metallographic composition. Titanium castings and titanium forgings have similar properties and have excellent tensile strength and fracture toughness. In recent years, titanium castings are widely used in petrochemical, medical equipment, precision machinery and sports equipment, etc. The most widely used is titanium dentures. In terms of titanium dentures, due to the requirements on the surface, wear resistance, corrosion resistance, and stress fatigue resistance, post-processing of titanium castings is essential.
The later surface treatment of titanium castings is not only to obtain a smooth surface, to reduce the accumulation and adhesion of food and plaque, to maintain the patient’s normal oral microecological balance, but also to increase the beauty of the denture; more importantly, Through these surface treatment and modification processes, the surface properties and adaptability of titanium castings are improved, and the wear resistance, corrosion resistance and stress fatigue resistance of dentures are improved.
Titanium denture casting internal pores and shrinkage cavity internal defects can be removed by hot static pressure technology, but it will affect the accuracy of the denture. It is best to use X-ray flaw detection, the surface is exposed to remove the pores, and laser repair welding. Surface pore defects can be repaired directly by laser local welding.