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Time: 2020-08-24 07:46:48Source: Ever -Power Group

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Spiral bevel gear materials and heat treatment.The material of the spiral bevel gear is the basis of various mechanical properties and processing properties of the spiral bevel gear.The basic requirement for selecting materials is to fully meet the requirements of mechanical properties and processing performance, and to minimize costs under these conditions.In the metal spiral bevel gear materials,...

Spiral bevel gearMaterials and heat treatment.
The material of spiral bevel gears is the basis of various mechanical properties and processing properties of spiral bevel gears.The basic requirement for selecting materials is to fully meet the requirements of mechanical properties and processing performance, and to minimize costs under these conditions.
Among metal spiral bevel gear materials, steel is most commonly used, followed by cast iron.Many of the spiral bevel gear materials used in our country are high-quality carbon steel and carburized steel, and high-alloy steel is rarely used.

Because the former can meet the performance requirements, while the price is low and easy to obtain.For spiral bevel gears for automobiles with a wide range of applications, the gear materials are almost all carburized steel, and the more representative one is 20CrMnTi.For spiral bevel gears used in mines, petroleum, etc., the material is mostly carburized steel.
Among the non-metallic spiral bevel gear materials, the most common one is plastic, such as nylon.The precision of the plastic gear is high, and the vibration and noise during transmission are relatively small.However, due to the poor hardness and strength of the plastic itself, plastic spiral bevel gears are mostly used in high-speed, light-load and low-noise applications.In recent years, ceramic spiral bevel gears have also become a hot spot.However, ceramic materials are brittle and difficult to process, so it is still at the theoretical stage.
Heat treatment is a key process to ensure the performance of spiral bevel gears. The quality of heat treatment has a key influence on the mechanical properties, processing performance and service life of the gear.At present, there are four commonly used heat treatments for spiral bevel gears: quenching and tempering, carburizing and carbonitriding, nitriding and nitrocarburizing, and induction hardening.Each of these four heat treatment methods has its own advantages and disadvantages.
The process of quenching and tempering is simple, that is, high temperature tempering after quenching. If the gear diameter is large, normalizing treatment is required before quenching and tempering.The quenching and tempering process is almost not affected by the tooth profile and tooth direction, and it is easy to operate, the equipment investment is small, and the versatility is good.However, the improvement of the surface hardness of spiral bevel gears is very limited. The tooth surfaces of the quenched and tempered spiral bevel gears are still in a soft tooth state, and the wear resistance is relatively poor, so it is generally only used as a pretreatment process for other heat treatment methods.
keyword:Spiral bevel gear
Article Source:https://spiral-gear.com
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