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采用模拟焊接热循环的方法,研究了3种焊接线能量状态下的10Ni5CrMoV钢热影响区(HAZ)的组织和性能.试验结果表明,焊接线能量为E=19kJ/cm状态下的显微组织为马氏体加上贝氏体加粒状组织(M+B上+G),其冲击韧性AKV-60℃明显比焊接线能量为E=24kJ/cm和E=30kJ/cm状态下的AKV-60℃低;焊接线能量为E=24kJ/cm状态下的显微组织为马氏体加上贝氏体加粒状贝氏体(M+B上+B粒),其冲击韧性AKV-20℃为196J、AKV-60℃为183J.文章推荐在实际生产中采用焊接线能量E=24kJ/cm焊接工艺.
The microstructure and properties of HAZ in 10Ni5CrMoV steel under three different welding wire energies were studied by means of simulated welding thermal cycling.The results show that the welding wire energy is the microstructure of EZN steel at the condition of E = 19kJ / cm For martensite plus bainite plus granular tissue (M + B + G), the impact toughness AKV-60 ° C was significantly higher than the weld line energy E = 24kJ / cm and E = 30kJ / cm state AKV- 60 ℃, the welding line energy is E = 24kJ / cm, the microstructure is martensite plus bainite plus granular bainite (M + B + B), the impact toughness AKV-20 ℃ For 196J, AKV-60 ℃ for 183J. The article recommended in the actual production of welding line energy E = 24kJ / cm welding process.