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本文通过 PRRC 试验,研究了焊接接头防止冷裂纹的临界应力,局部预热附加热应力与预热和后热规范的关系,提出了国产低合金高强钢焊接接头的冷裂敏感系数判据,然后在实际工程中对所建立的判据进行了验证与应用。
In this paper, the PRRC test was used to study the critical stress of cold cracking prevention of welded joints, the relationship between the additional thermal stress of local preheating and the preheating and post-heating specifications, and the criterion of cold cracking susceptibility of domestic low alloy high strength steel welded joints was proposed In the actual project to verify the established criteria and applications.