焊管2017，Vol.40Issue(5)：14-18,23,6.DOI:10.19291/j.cnki.1001-3938.2017.05.003
冷却速率对SEW管坯焊缝性能的影响研究
Research on Influence of Cooling Rate on SEW Pipe Billet Weld Performance
摘要
Abstract
In order to study the influence rule of different cooling rate on SEW pipe billet weld performance, the mechanical properties and microstructure of pipe billet with two kinds of compositions under different cooling rate after hot stretch-reducing were studied respectively, as well as weld microstructure optimization of pipe billet. The study results indicated that after 12~18℃/s cooling process for HFW pipe billet, the elongation was reduced by 7%, but the yield strength and tensile strength of pipe billet was improved about 30% and 12%, it can realize good matching of strength and plasticity. Increasing the cooling rate of pipe billet after hot stretch-reducing can refine grains size of weld and HAZ, and effectively homogenize the microstructure of weld zone and base material.关键词
焊管/热张力减径/中频感应加热/加速冷却/热影响区Key words
welded pipe/hot stretch-reducing/medium-frequency induction heating/accelerated cooling/heat affected zone分类
矿业与冶金引用本文复制引用
何石磊,韦奉,李远征,张峰,梁航,苑清英..冷却速率对SEW管坯焊缝性能的影响研究[J].焊管,2017,40(5):14-18,23,6.基金项目
陕西省科技统筹创新工程计划项目"高性能SEW膨胀管关键技术研究"(项目编号2015KTCL01-15). （项目编号2015KTCL01-15）
