• 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

About Carburizing Process of 15CrMo Steel

Carburizing is a heat treatment process in which steel is placed in a medium with sufficient carbon potential and heated to an austenite state and kept warm to form a carbon-rich layer.

Specifically, 15CrMo steel is placed in an environmental medium with a high carbon potential, and the highly active carbon atoms are diffused into the interior of the 15CrMo steel to form a carburized layer with a certain thickness of high carbon content, and then quenched and tempered, so that the surface layer of 15CrMo steel has a high carbon content, while the core has a lower carbon content because the carbon content maintains the original concentration, it can improve the wear resistance of the surface layer of 15CrMo steel while maintaining the high impact resistance of the core. Carburizing with methanol-kerosene dripping gas, the cracking products of methanol at high temperature, such as H2O and CO2, oxidize CH4 and C. The furnace gas composition and carbon potential can be kept within a certain range.

Carburizing can improve the mechanical properties of 15CrMo steel in many ways, improve the hardness and wear resistance of 15CrMo steel, and reduce the impact toughness and fracture toughness (impact toughness and fracture toughness increase with the higher the carbon content on the surface and the deeper the carbon layer, the more it is reduced), the fatigue strength of 15CrMo steel can be improved at the same time (the high strength of the carbon layer contributes to the improvement of fatigue strength).