Professional space frame manufacturer

  1. hydrogen relief treatment For the structural steel with large tendency of cold cracking, heat the welded joints to 200℃～250℃ after welding and keep them warm for a period of time to accelerate the diffusion and escape of hydrogen from the welded joints to prevent cold cracking caused by the accumulation of welding hydrogen. Temperature for a period of time to accelerate the diffusion of hydrogen in the welded joints to prevent the accumulation of hydrogen in the welded joints and lead to cold cracking of the post-weld heat treatment method. 2.Stress relief treatment After welding, the welded joints are heated to a certain temperature below the Ac1 line of the base material and kept warm for a period of time to reduce the Welding residual stress, reduce the tendency of cold cracking of welded joints for the purpose of post-welding heat treatment method. 3.Weld access hole In the main weld and secondary weld cross position, in order to ensure the continuity of the main weld, to...