Application of titanium alloy parts in automobile manufacturing

Titanium alloy materials have been widely used in aerospace, petrochemical and shipbuilding industries, but their application in the automotive industry has developed slowly. Starting from the successful development of the first all-titanium car by General Motors in 1956, titanium auto parts did not reach the mass production level until the 1980s. In the 1990s, with the increasing demand for luxury cars, sports cars and racing cars, titanium Manufacturing parts have been developed rapidly. In 1990, the amount of titanium used in automobiles in the world was only 50t, in 1997 it reached 500t, in 2002 it reached 1100t, and in 2009 it reached 3000t. Titanium alloy parts have the following main applications in the automotive industry: titanium square pipe     ERTi-23 Titanium Welding Wire     ASTM F67 Gr2 Titanium Plate     Gr9 Titanium Seamless Tubes For Bike Frame

1. Engine connecting rod

Titanium alloys are ideal materials for connecting rods. The engine connecting rod made of titanium alloy can effectively reduce the quality of the engine, improve the fuel efficiency and reduce the displacement. Compared with steel connecting rods, titanium connecting rods can reduce the mass by 15% to 20%. The materials used for titanium alloy connecting rods are mainly Ti-6Al-4V, Ti-10V-2Fe-3Al, Ti-3Al-2.0V and Ti-4Al-4Mo-Sn-0.5Si, etc. Other titanium alloy materials such as Ti The applications of -4Al-2S i-4Mn and Ti-7M-4Mo in connecting rods are also under development.

2. Engine valve

The automobile engine valve made of titanium alloy can not only reduce the quality and prolong the service life, but also reduce the fuel consumption and improve the reliability of the automobile. Compared with steel valves, titanium valves can reduce the mass by 30% to 40%, and the limit speed of the engine can be increased by 20%. As far as the current application is concerned, the material of the intake valve is mainly Ti-6A l-4V, and the material of the exhaust valve is mainly Ti-6242S. Usually, Sn and Al are added together, which can obtain lower brittleness and better performance. High strength; the addition of Mo can improve the heat treatment performance of titanium alloy, strengthen the strength of quenching and aging titanium alloy, and increase the hardness at the same time.

3. Valve spring seat

High strength and fatigue resistance are the properties that the valve spring seat must have. β-titanium alloy is a heat-treated alloy, which can obtain high strength through solution aging treatment. The corresponding more suitable materials are Ti·15V-3Cr- 3Al-3Sn and Ti-15Mo-3Al-2.7Nb-0.2Si. Mitsubishi Motors uses Ti-22V-4Al titanium alloy valve spring seat in its large-scale production vehicles, which reduces the mass by 42% compared with the original steel lock, reduces the inertial mass of the valve mechanism by 6%, and increases the maximum engine speed. 300r/min.