The carburizing heat treatment equipment for automobile parts mainly includes sealed box type multi-purpose furnace, single row, double row and multi-row continuous automatic carburizing line, vacuum (low pressure) carburizing high pressure gas quenching furnace and the like. For carburizing of automobile gears, heat-treated carburizing equipment is mainly used in sealed box type multi-purpose furnace, single-row and double-row continuous automatic carburizing line.
The rear axle gear of the automobile is an important component of the automobile transmission mechanism. The bearing capacity is large, and its performance directly affects the comfort performance of the whole vehicle. However, the heat treatment carburizing atmosphere of the front and rear axle gears of the automobile mostly adopts the conventional nitrogen-methanol atmosphere or Super carburizing atmosphere of propane + air. The main consumption of carburizing is medium and electrical energy. If the infiltration process is used in carburizing, this not only saves time and reduces deformation, thereby improving the heat treatment quality of the product, and at the same time effectively achieving the purpose of energy saving and reducing the heat treatment cost of the product.
1. Jinbei van rear axle driven arc bevel gear carburizing process SY6480 series gold cup sea lion van rear axle driven arc bevel gear as shown in Figure 1. The material is 20CrNiMoH (8620H) steel. Product technical requirements: The microstructure is evaluated according to QC262-1999 "Carbon carburizing gear metallographic test" standard, among which MA / 1 ~ 5 and K1 ~ 5 are qualified; hardened layer depth is 1.0 ~ 1.4mm; surface hardness 60-64HRC, core hardness is 33~48HRC; internal hole deformation ≤0.05mm, inner end deformation ≤0.05mm, outer end surface ≤0.03mm; carburizing equipment adopts Huisen sealed box type quenching furnace, model SHQF-2/ 2.
Figure 1 SY6480 driven spiral bevel gear
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