Selecting and using metal materials is a very important task for China mini gear motor manufacturers. Meet the mechanical properties of materials the mechanical properties of materials include strength, hardness, plasticity and toughness, etc., reflecting the material in the use of the process of the performance of the characteristics. The contact stress at the contact point of tooth surface and the maximum bending stress at the root of tooth may cause the failure of tooth surface or tooth body strength. Each point of the tooth surface has a relative sliding, will produce wear. The main failure modes of gear include pitting, gluing, plastic deformation and tooth fracture. Therefore, it is required that the gear material should have high bending fatigue strength and contact fatigue strength, the tooth surface should have sufficient hardness and wear resistance, and the core should have certain strength and toughness. For example, in the determination of large, pinion hardness should pay attention to make the pinion tooth surface hardness is 30-50hBS higher than the tooth surface hardness of the big gear, this is because the pinion load times more than the big gear, and the pinion tooth root is thinner, the strength is lower than the big gear. In order to make the teeth of the two gears close to equal strength, the tooth surface of the pinion is harder than that of the big gear. On the other hand, according to the use of material properties determined after the material grade. To clarify the mechanical properties of the material or the hardness of the material, then we can achieve the required range of hardness through different heat treatment processes, so as to give the material different mechanical properties.
