Titanium alloy can be used as an excellent material for manufacturing automobile parts

The application of titanium materials in automobiles began in the mid-1950s. In 1956, general motors of the United States launched a titanium body exhibition vehicle named "Firebird II". Some titanium alloy parts were used in r382 car produced by Nissan in the late 1960s; In the 1980s, Honda used titanium to make racing parts.

The inlet and outlet valves of V-8 cylinder block manufactured by Del West in United States have been widely used. The inlet valve uses Ti-6Al-4V, and the exhaust valve uses ti-6al-2sn-4zr-2mo alloy. The weight of each valve is about 50g lighter than that of stainless steel, and the service life of each valve is 2-3 times longer. The ti-5al-2cr-1fe alloy intake valve made by Hitachi in Japan by sintering method has been widely used. The r382 and r380 cars of Nissan Motor company equipped with this kind of intake valve have won many competitions. In the past, the weight of steel valve was 90 g, while that of titanium alloy valve was only 55 g, which reduced by 40% and improved the performance by 10% ~ 15%.

The automobile valve made of titanium alloy can not only reduce the mass and prolong the service life, but also improve the reliability and save fuel. It was used to make high cost titanium alloy before γ- The max speed of the engine is increased by about 10% with Ti Al alloy. In recent years, some titanium producers have developed a number of titanium alloys for engine valves with lower prices, and some of them have entered the stage of mass production. It is a key technology to improve the wear resistance of valve titanium alloy. It is one of the effective processes to improve the surface hardness and wear resistance to infiltrate oxygen on the surface, even if there is as much oxygen as possible in the solid solution of titanium.