齿轮材料的合理选择（Reasonable choice of gear material）.docVIP

齿轮材料的合理选择（Reasonable choice of gear material） Reasonable choice of gear material Release date: 2008-9-2 [collection comments did not find the desired knowledge] Gear is one of the most widely used mechanical transmission parts in modern machines. Gears drive the motion and power of any two axes through the teeth, and change the form and speed of motion. Gear drive has a wide range of use, constant transmission ratio, high efficiency and long service life. In the process of design and manufacture of mechanical parts of the product, not only to consider the properties of the materials to adapt to the working conditions, make parts durable and require materials processing performance and good economy, in order to improve parts productivity, reduce costs, reduce consumption. If the gear material is not chosen properly, premature damage or even failure of the parts will occur. Therefore, how to choose and use metal materials reasonably is a very important job. Satisfy the mechanical properties of materials The mechanical properties of the material include strength, hardness, plasticity, toughness, etc., which reflect the characteristics of the material in use. When the gear is engaged, there is a contact stress at the contact of the tooth surface, and the maximum bending stress at the root of the tooth may result in the failure of the tooth surface or the strength of the tooth body. Each tooth surface has relative sliding and will cause wear. The main failure forms of gear tooth surface pitting, tooth bonding, tooth deformation and tooth surface. Therefore, the gear materials required high bending fatigue strength and contact fatigue strength, tooth surface should have sufficient hardness and wear resistance, the core should have certain strength and toughness. For example, in large and small gear hardness should pay attention to the small gear tooth surface hardness than the big gear tooth surface hardness 30-50HBS, this is because of the small number of gear by the loa