In order to guarantee the performance of 13CrMo44 steel pipe base metal and weld, besides the control of welding process, it is very important to preheat the 13CrMo44 steel pipe base metal before welding and to formulate reasonable heat treatment scheme after 13CrMo44 steel pipe welding.
Preheating before welding is one of the effective measures to prevent cold cracks and eliminate stress cracks in welding process of 13CrMo44 steel pipe. The selection of preheating temperature should be based on the alloy content in steel. The preheating temperature of 13CrMo44 steel pipe is chosen according to the thickness of the pipe wall, the general preheating temperature is between 150℃and 300℃, and the interlayer temperature of 13CrMo44 steel pipe welding is controlled above the preheating temperature. If the preheating temperature is too high, the martensite will easily form in the final microstructure, and if the hydrogen content is too high in the 13CrMo44 steel pipe welding process, the welded joints will easily form cracks.
To prevent cracks in 13CrMo44 steel pipe welded joints, it is generally adopted immediately after welding low-temperature post-heat treatment can basically eliminate the diffusion of hydrogen in the weld and ensure the quality of the 13CrMo44 steel pipe joint. This treatment is also called dehydrogen treatment. The temperature of hydrogen elimination treatment is generally 300 ~ 350℃.
Katalor is a famous steel exporter and supplier in China. If you need the 13CrMo44 steel pipe, please contact us freely. Our sale manager is very professional in 13CrMo44 steel pipe. So we can supply the high quality 13CrMo44 steel pipe with different sizes to meet your any requirements. Welcome to contact us!
