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采用“WELDCALCULATION”专用软件对Q390E、Q4 2 0E两种钢材的最低预热温度进行了计算 ,并采用插销试验和小铁研试验对计算结果进行了验证 ,在此基础上确定了松花江斜拉大桥钢梁不同厚度Q390E、Q4 2 0E钢板的焊接预热温度 ,研究成果在桥梁的焊接生产中得到成功应用
The WELDCALCULATION software was used to calculate the minimum preheating temperature of Q390E and Q420E steel. The calculation results were verified by plug test and small iron test. Based on this, The preheating temperature of Q390E and Q4 2 0E steel plates with different thickness of steel girder in bridge is successfully applied in the welding of bridges