The utility model relates to the technical field of
carburizing devices, and discloses a low-
carbon alloy steel
carburizing device which comprises a base plate, a
carburizing assembly, a driving
assembly and a gas homogenizing
assembly. According to the low-
carbon alloy steel carburizing device, by optimizing the structural design, gas distribution is more uniform, the depth and uniformity of a carburized layer are remarkably improved, when a first
servo motor is started, a base and a first spiral guide plate can be driven to rotate, and therefore low-
carbon alloy steel placed on the base can be driven to rotate; the surface of the low-carbon
alloy steel is uniformly exposed in carburizing gas, a first spiral guide plate drives the gas to spirally flow, the contact area and time of the gas and the low-carbon
alloy steel are increased, meanwhile, a second
servo motor is started to enable the first spiral guide plate and a second spiral guide plate to form a
convection effect, gas distribution is further optimized, and carburizing efficiency is improved. And the arranged gas conveying assembly can ensure rapid switching work of carburizing gas and
inert gas, and the gas switching process is simplified.