During the quenching heat treatment of the cold drawn tube, it is easy to affect the performance of the tube itself due to improper operation control and cause damage to the quality. So what are the problems that often occur during quenching of cold drawn tubes?
1. Due to the low speed during the quenching and cooling process, it is easy to cause problems such as insufficient hardness and uneven hardness of the cold drawn tube. The insufficient quenching hardness is often caused by the insufficient cooling rate at the middle and high temperature stage, so the low temperature cooling rate of the quenching medium used is accelerated.
2. The hardness of the core of the cold drawn tube is too high after quenching. This type of problem may be related to the too fast 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 quenching medium manufacturer and add appropriate additives to slow down the cooling temperature of the quenching oil. The third method is to use steel with low hardenability.
3. Quenching deformation. You can speed up the cooling rate and try to achieve uniform cooling, as long as the measures in the same direction of action are reasonably selected for application. It can solve the quenching deformation problem of most cold-drawn tube processing plants.
Cold-drawn tube manufacturers are constantly groping during the production process, constantly discovering problems and solving problems, so that today's cold-drawn tubes are constantly strengthened during the development process.