Material selection analysis of tractors and auto parts

1. Material selection of engine and transmission system parts These two parts include quite a few parts. Among them, there are a large number of gears and various shafts, as well as parts that work at high temperatures, such as intake and exhaust valves, pistons, etc. Their materials are more important, and they are generally selected based on experience. For different types of cars and different production plants, the selection of materials for engines and transmission systems is different. According to the specific working conditions and actual failure modes of the parts, suitable materials should be selected through a large number of calculations and tests. 2. Material selection to reduce the weight of automobiles With the increasing shortage of energy and raw material supplies, people have higher and higher requirements for energy conservation and consumption reduction of automobiles. Reducing the self-weight can increase the weight utilization factor of the car, reduce material consumption and fuel consumption, which is of great significance in terms of resource and energy conservation and economic value. The materials selected to reduce their own weight should be lighter than traditional materials and ensure business performance. For example, using aluminum alloy or magnesium alloy instead of cast iron can reduce the weight to 1/3~1/4 of the original weight, but it does not affect its performance; the use of new dual-phase steel plates instead of ordinary low-carbon steel plates to produce automobiles For stamping parts, thinner plates can be used to reduce the weight, but the strength of the components is not reduced at all; in the car body and some less important structural parts, using plastic or fiber reinforced composite materials instead of steel can also reduce the weight and reduce Energy consumption.