| Microstructure and fracture toughness of electron beam welded joints of 30CrMnSiNi2A steel |
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| 引用本文： | 陈芙蓉,霍立兴,张玉凤,刘方军,陈刚. Microstructure and fracture toughness of electron beam welded joints of 30CrMnSiNi2A steel[J]. 中国焊接, 2002, 11(1): 20-24 |
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| 作者姓名： | 陈芙蓉 霍立兴 张玉凤 刘方军 陈刚 |
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| 作者单位： | 陈芙蓉,霍立兴(College of Material Science and Engineering, Tianjin University, Tianjin, 300072);张玉凤(College of Material Science and Engineering, Tianjin University, Tianjin, 300072；College of Material Science and Engineering, Tianjin University, Tianjin, 300072);刘方军,陈刚(Aviation Techniques Institute of Beijing, Beijing , 100024) |
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| 摘 要： | Two post-weld heat-treatments ( PWHT) , 900℃ oil quenched and low temperature tempered (PWHTA) and high temperature tempered and then 900~C oil quenched and low temperature tempered ( PWHTB ) , are employed to treat the weldment. Then the effect of two post-weld heat-treatment processes on the microstructure, mechanical properties and fiacture toughness of electron beam welded joints of 30CrMnSiNt‘2A steel have been discussed. The results show that, after two kinds of PWHT the microstructure and hardness at every zones of EBW joints are nearly same. Although the welds have good mechanical properties, fiacture toughness of both weld and heat-affected zone (HAZ) is low, the CTOD values of welds are comparatively higher than that of HAZ. Microstructure and fiacture toughness of two EBW joints have no evident differences.
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| 关 键 词： | 30CrMnSiNi2A钢 电子束焊接 焊接接头 显微结构 断裂韧性 低合金高强度钢 焊接热影响区 |
Microstructure and fracture toughness of electron beam welded joints of 30CrMnSiNi2A steel |
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| Abstract: | Two post-weld heat-treatments (PWHT), 900℃ oil quenched and low temperature tempered (PWHTA) and high temperature tempered and then 900℃ oil quenched and low temperature tempered (PWHTB), are employed to treat the weldment. Then the effect of two post-weld heat-treatment processes on the microstructure,mechanical properties and fracture toughness of electron beam welded joints of 30CrMnSiNi2A steel have been discussed. The results show that, after two kinds of PWHT the microstructure and hardness at every zones of EBW joints are nearly same. Although the welds have good mechanical properties, fracture toughness of both weld and heat-affected zone (HAZ) is low, the CTOD values of welds are comparatively higher than that of HAZ. Microstructure and fracture toughness of two EBW joints have no evident differences. |
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| Keywords: | electron beam welding 30CrMnSiNi2A steel post weld heat treatment microstructure fracture toughness |
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