Preheating & heat treatment machine and accessories
Post-weld heat treatment to eliminate stressThe welding residual stress is caused by the uneven temperature distribution of welding parts and the thermal expansion and cold contraction of welding metal, so the welding construction will inevitably produce residual stress.The most common m
Preheating temperature of commonly used steelKinds of steelThe tube materialPlate materialThicknessmmpreheating temperature℃Thicknessmmpreheating temperature℃Carbon steel and its castings with carbon content less than or equal to 0.35%≥26100～200≥30≥28100～150C-Mn(16Mn、16MAR)≥15150～200Mn-V(1
Objective and method of post-weld heat treatmentThe welding residual stress is caused by the uneven temperature distribution of welding parts and the thermal expansion and cold contraction of welding metal, so the welding construction will inevitably produce residual stress.The most comm
What are the Advantages of welding Preheating?Welding holds some of the most violent changes of temperature in the manufacturing industry. Pre-heating the metal can help prevent weld cracking caused by these extremities.One of the main reasons for weld cracking has to do with the p
What is Post weld heat treatmentPost weld heat treatment(PWHT) is a controlled process in which a material that has beenweldedis reheated to a temperature below its lower critical transformation temperature, and then it is held at that temperature for a specified amount