Gear precision carburizing heat treatment technology and control accuracy requirements

The gear precision carburizing heat treatment technology and control accuracy requirements are described as follows, for reference.

XNUMX. Precision carburizing heat treatment technology

1. Quality online control

An accurate and sensitive sensor control system can be used to accurately control the quality of heat-treated workpieces on-line, so as to achieve a 100% pass rate.

2. Control accuracy requirements

Furnace temperature control accuracy ≤±1℃, multiple points of effective heating zone ≤±5℃, carburizing furnace gas carbon potential is controlled at ≤±0.05%, carburizing layer depth fluctuates ±0mm.

Therefore, under continuous production conditions, measurement of furnace temperature uniformity and effective heating zone shall be carried out in accordance with GB/T 9452 at least twice a year.

XNUMX. Precision requirements for precision carburizing heat treatment control

1. Control accuracy of carburizing atmosphere

Using oxygen probes as sensors and various types of carbon controllers, as well as databases and process software suitable for various steels and different carburizing processes, can realize timely control at the moment of the process, and control the carbon content on the surface of steel parts to ± Within the range of 0.03%～±0%, the depth of the infiltration layer is controlled within the range of ±05mm.

2. Temperature control accuracy  

GB/T 9452 puts forward different requirements for the temperature control accuracy and the maximum allowable deviation of the furnace temperature according to 6 types of heating furnaces.

一般最终热处理的加热炉都应满足Ⅰ～Ⅲ类的规定，即从炉温允许最大偏差±3℃、±5℃及±10℃，相应控制精度为±1.0、±1.5及±5.0，相应仪表精度等级不低于0. 25、0.3和0.5。

AbovegearThe description of precision carburizing heat treatment technology and control accuracy requirements is for reference. If there is any update without notice, you can consult EP for free if you are unclear or related to processing requirements.