How the effect arise when forging is quenched and cooled?

 

31JUL

Next, let’s learn about the quality problems and solutions of forgings in quenching and cooling:Cangzhou wilson pipeline  sales@wilsonpipeline.com

Insufficient hardness and enough hardening depth: quenching cooling rate is low is forging quenching hardness is insufficient, the cause of the uneven hardness and hardening depth is not enough, but, according to the actual quenching forging materials, shape, size and heat treatment requirements, and can be divided into high temperature stage of insufficient cooling speed and cooling speed in low temperature stage and different situation such as insufficient cooling speed and low temperature stage.For example.For small and medium forgings, the insufficient quenching hardness is often caused by the insufficient cooling rate in the middle and high temperature stage, and when the forgings with large modulus require a deeper quenched layer, it is necessary to increase the low temperature cooling rate.For quenching oil, generally speaking, the steam film stage of oil is short, the cooling rate of medium temperature is fast, and the cooling rate of low temperature is fast, so it can often obtain high and uniform quenching hardness and enough quenching depth.

High core hardness after quenching: this kind of problem may be related to the selected medium cooling rate too fast or the medium low temperature cooling rate is too high.One solution is to change the quenching oil to meet the requirements.The other way is to contact the quenching medium manufacturer and add appropriate additives to reduce the cooling rate of the quenching oil at medium and low temperature.The third way is to use steel with lower hardenability.