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What are the materials used for automotive driveshafts?
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The driveshaft of an automobile is one of the components whose role can be described as a power transmission device. The role of the driveshaft is to transfer power from the transmission to the drive wheels so that the vehicle can move forward or backward properly. If it is damaged there will be a strange sound of accelerating sharply or killing the direction.
Automotive Drive Shaft Materials - Introduction
Commonly used materials for shaft parts are 35, 45 and 50 carbon steel, of which 45 steel is widely used. For shafts with smaller or less important loads, ordinary carbon steel such as Q235 and Q255 can also be used. For the larger force, larger axial dimensions, weight restrictions or some special requirements can be used alloy steel. Such as 40Cr alloy steel can be used for medium precision, high-speed work occasions, the material has good comprehensive mechanical properties after tempering; selection of Cr15, 65Mn and other alloy steels can be used for higher precision, poorer working conditions occasions, these materials after tempering and surface quenching, its wear resistance, fatigue strength performance is better; if the shaft parts work in high-speed, heavy-duty conditions, you can choose 20Cr. 20CrMnTi, Q255, Q255 and other common carbon steel, 20CrMnTi, 20Mn2B mild steel or 38CrMoA1A carburized steel, these steels by carburizing quenching or nitriding treatment, not only has a very high surface hardness, and its heart strength is greatly improved, so it has good wear resistance, impact toughness and fatigue strength performance. Ductile cast iron, high-strength cast iron due to good casting properties, and vibration damping properties, often used in the manufacture of complex shape and structure of the shaft. In particular, China's development of rare earth - magnesium ductile iron, with good impact toughness, also has the advantages of friction reduction, vibration absorption, low sensitivity to stress concentration, etc., has been used in the manufacture of automobiles, tractors, machine tools on the important shaft parts.
Automotive drive shaft materials - composition
Automotive drive shaft is composed of shaft tube, telescopic sleeve and universal joint. The telescopic sleeve can automatically adjust the distance change between the transmission and the drive axle. Universal joint is to ensure that the transmission output shaft and the drive axle input shaft two axis line angle change, to realize the two axles of equal angle speed. Generally, the universal joint has cross shaft, cross bearing and flange fork. The drive axle universal joints used in Steyr series heavy-duty vehicles adopt roller-type cross shaft bearings, which are short and thick and can transmit a larger turning distance. There is a butterfly spring at the end of the bearing to compress the rollers. A reinforced nylon spacer with spiral grooves is added to the end face of the cross shaft to prevent burnout when transmitting power at large angles or turns.
Summary：
The driveshaft of an automobile is one of the components whose role can be described as a power transmission device. The role of the driveshaft is to transfer power from the transmission to the drive wheels so that the vehicle can move forward or backward properly. If it is damaged there will be a strange sound of accelerating sharply or killing the direction.
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Date：
2023-02-27
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