In addition, the stable hardenability of steel makes it easy to control the machining performance and deformation tendency of heat treatment, which is particularly important for a large number of gears produced by cloud. Therefore, the requirements of hardenability band width of steel are put forward. At present, due to the application of smelting composition control technology, it is no problem to control the width of steel hardenability band to 4-6HRC.
Steel that guarantees hardenability is marked with an "H" after its grade
Material is the basis of gear bearing capacity, reasonable selection of material can make gear fully meet the performance requirements at the same time, with the lowest cost of production.
The wheel material is mainly steel, followed by cast iron, steel alloy and other special materials.
Alloying of gear steel
Because the gear shape and force are more complex, the Japanese high load harmonic gear box CSF-45-80-2UH, east China agency is very particular about the selection of steel. Production, multi-purpose alloy steel gear, a little less important and some of the pinion gear USES carbon steel: this is because most of the gear needs not only high strength, good toughness, wear resistance, (department of guarantee on the cross section are also required to obtain the necessary strain, penetration, in order to keep the thicker the bearing surface of uniform comprehensive mechanical properties. In addition, from the perspective of heat treatment process. In order to reduce heat treatment deformation, the quenching cooling rate should be slowed down as much as possible, which requires various alloy elements in austenite to reduce the critical cooling rate.
Depth of quenching and tempering of gear steel
Due to the limitation of steel hardenability and cooling conditions, it is often difficult to quench the whole section of the larger gear during quenching and tempering. Different kinds of steel, under different cooling conditions, Japanese high load harmonic gear box CSF-45-80-2UH, east China agent according to the size of the section, its quenching depth is different.