Titanium casting Condensing shrinkage

Although Japan through years of research, introduced the Titanium 
 -vest, Titanium-vest-D (Ohara Co.), Selevest-DM, Selevest-D (Center for rotating, the United States has Noyes Vinh phuc) Tycast Mold (Pentron Co.), Germany Tancovest (Bego Co.), Rematitan plus (Dentaurum Co.) and other commercial products, although all have their own advantages, but also the existence of their own shortcomings, such as the pollution layer too thick and lack of precision castings.

  Theory and molten titanium oxide was blunt in calcination temperature shape variables are not large, can not be compensated completely condensed shrinkage Titanium casting process

The first domestic dental titanium casting machine

Although the The Fourth Military Medical University and Henan Luoyang Jianxi light industry general machinery factory jointly developed the first domestic dental Titanium alloy valve, and in the domestic sales of 23 units, and laid a solid foundation for Titanium  denture in China extensively,

   But due to the Department of Stomatology crowns and bridges of the high accuracy requirement, the internal (shaft wall) fit < 73µm, marginal fit < 100 µm, there is no domestic embedding material can meet this demand.

Titanium development

Through research, the author thinks that the development direction of titanium alloy is mainly: (1) standard evaluation of fire retardant properties of titanium alloy and method. Flame retardant performance evaluation of titanium alloy right is one of the key techniques of flame retardant titanium alloys, including the simulation methods and detection technology of combustion of titanium alloy. At present, the flame retardant titanium sheets performance evaluation method has no uniform standards, countries have adopted different methods to test. Flame retardant performance evaluation method of titanium alloy and therefore the formulation of a unified standard will effectively promote the national Titanium alloy valves exchange. (2) increase the mechanical aerospace titanium castings properties of titanium alloy. Compared with the titanium alloy, titanium alloy is poor mechanical properties, low working titanium alloy plates temperature. Research on how to improve the mechanical properties of this alloy for deeper. (3) reduce the cost of titanium alloy. Titanium alloy containing large amount of noble metal elements of V, resulting in higher costs, limiting its application. The domestic scholars have studied to replace V with Mo part of low price.

Cast titanium tubes embedded material performance requirements titanium sponge plant

Cast titanium tubes embedded material performance requirements
     Medicine to obtain a good casting cast titanium tube size to the embedding material hardening and

thermal expansion compensation titanium alloy pump expanded metal casting shrinkage is the most commonly used method. Titanium

tube casting line shrinkage of 0.9-1.0%, the total expansion required when casting titanium tubes embedded

material must be able to titanium tube compensate for the contraction of the range of metal and titanium tube system in

principle, with the cast of embedding material not mix. Therefore, the choice of cast titanium with embedded

material conditions must have the following conditions:
     1. Rarely react with titanium.
     2 to obtain good surface properties.
     3 castings are not titanium casting contaminated.
     4 titanium tube shrinkage compensated moderate swell.