• Improper welding of X80 pipeline may cause cracks
• Brief introduction of API X52 pipeline steel
• The difference between PSL1 and PSL2
• Harm of inclusions in X70 pipeline steel
• API 5L pipeline pipe
• X52 steel plate surface quality standards that need to be met
• The basic production process of API 5L X60 pipeline steel
• The key to Q460D steel welding process
• What does the heat treatment of Q690 Steel include?
• Reasons for choosing Q690D steel

Common Defects and Preventive Measures of 15CrMo Steel

1. Cracks appear on the surface of 15CrMo steel after carburizing
Reason:
a.The concentration of surface penetration layer for 15CrMo steel is too high.
b.15CrMo steel has poor concentration gradient of infiltrated layer.
c.The cooling rate of 15CrMo steel is not appropriate.
d.15CrMo steel itself has serious dendrite segregation.

Prevention method:
a.Strictly control the heating temperature and speed of 15CrMo steel, and try
to heat evenly.
b. Strictly control the carburizing process of 15CrMo steel.
c. Select the appropriate cooling rate.
d. Check whether there is segregation in the composition of 15CrMo steel.

2. Deformation of 15CrMo steel after quenching
Reason:
a.15CrMo steel is quenched in the wrong way.
b.The quenching cooling rate of 15CrMo steel is too large.
c.The temperature of quenching heating for 15CrMo steel is too high.

Prevention method:
a. Formulate the correct quenching method.
b. Select the appropriate quenching medium and quench in strict accordance
with the operating specifications.
c. Control the quenching heating temperature.