What Problems Often Occur With Cold Drawn Tubes During Quenching?

- Jul 23, 2019-

In the quenching heat treatment, the cold drawn tube is easily damaged due to improper operation control, affecting the performance of the pipe itself and causing damage to the quality surface. So what are the problems often caused by cold drawn tubes during quenching?


1. During the quenching and cooling process, the speed is low, which is easy to cause the hardness of the cold drawn tube to be insufficient, and the hardness is not uniform. The quenching hardness is often caused by insufficient cooling speed in the middle and high temperature stage, so the low temperature cooling rate of the quenching medium used is accelerated.


2. The hardness of the cold drawn tube is too high after quenching. This type of problem may be related to the excessive cooling rate of the selected medium or the low temperature cooling rate of the medium. One solution is to change the quenching oil to meet the requirements. The second method is to contact the manufacturer of the quenching medium and add appropriate additives to slow down the medium and low temperature cooling rate of the quenching oil. The third method is to switch to a steel with low hardenability.


3. Quenching deformation. By speeding up the cooling rate and trying to achieve uniform cooling, the application should be done with reasonable measures of the same direction of action. It can solve the quenching deformation problem of most cold drawn pipe processing plants.


In the production process, cold-drawn pipe manufacturers are constantly exploring and continually discovering problems and solving problems, so that today's cold-drawn pipes are continuously strengthened in the development process.