A high-quality automobile camshaft gear usually adopts the following materials:

1. Steel: Common camshaft gear materials include carbon steel, alloy steel and stainless steel. Steel has high strength, wear resistance and corrosion resistance, and is suitable for working environment under high pressure and high speed rotation.

2. Aluminum alloy: Aluminum alloy camshaft gear is usually used for lightweight design, which can reduce the overall weight, reduce the inertia load and improve the response speed and fuel economy of the engine.

3. Titanium alloy: The titanium alloy camshaft gear has excellent strength, wear resistance and light weight, and is suitable for high-performance automobile engines.

4. Cast iron: Cast iron camshaft gears are usually used for economical vehicles or low-power engines, which have good wear resistance and cost efficiency.

5. High-strength plastics: Some high-performance automobile camshaft gears are made of high-strength engineering plastics, which have excellent wear resistance and shock absorption performance, while reducing noise and vibration.

When selecting the material of camshaft gear, it is necessary to comprehensively consider the factors such as car model, engine power, use environment and expected performance, and select the appropriate material to ensure the quality and reliability of camshaft gear. Camshaft gears made of different materials have their own advantages and disadvantages, so they need to be selected according to specific conditions.