12Ni2CrMoV钢焊接过热区相变组织的研究
STUDY OF THE TRANSFORMATION STRUCTURE IN THE WELD OVERHEATED ZONE OF 12Ni2CrMoV STEEL
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摘要: 本文通过模拟焊接热循环技术,研究测定了12Ni2CrMoV钢焊接CCT图,掌握了该焊接过热区相变规律和组织特征。同时用斜Y型铁研试验法研究了预热温度对该钢焊接冷裂敏感性的影响。试验结果表明,在焊缝金属扩散氢含量为1ml/100g和2ml/100g时,斜Y型铁研试验临界预热温度分别为60℃和100℃。提出为保证12Ni2CrMoV钢焊接过热区具有良好缺口韧性时,其焊接线能量不宜超过29.3~33.4×103J/cm。本文通过焊接CCT图数据与斜Y型铁研试验数据的一致性,提出12Ni2CrMoV钢最佳焊接工艺条件,同时应用于实际生产的大型焊接结构上,并取得良好的焊接质量。
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关键词:
- 相变组织 /
- 12Ni2CrMoV钢 /
- 过热区
Abstract: CCT Diagram of 12Ni2CrMoV steel has been formulated through the investigation of the simulatad weld thermal cycles. The transformation principles and structure characteristics in the overheated zone have been observed. The Y-groove tests have been adopted in studing the effect of preheat temperature on the susceptibility to cold cracking. The test results have shown the critical preheat temperatures are 60℃ and 100℃ when the contents of diffusible hydrogen in the weld metal are 1ml/100g and 2ml/100g respectively. The energy imput may not exceed 29.3~33.4×103J/cm in order to ensure a good notch toughness for the overheated zone. In consideration of the consistency of the data in both the CCT Digram and the Y-groove tests for 12Ni2CrMoV steel, the authors put forward the optimum welding technology for the fabrication of large welded structures.-
Keywords:
- Transformation structure /
- 12Ni2CrMoV steel /
- Overheated zone
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期刊类型引用(2)
1. 周留研，刘利国，马晖，陈东旭. AZ31B镁合金盐浴碳氮钒共渗工艺. 金属热处理. 2022(07): 259-264 . 
百度学术
2. 吴永忠，任坤，谢鸥，卢金斌. 盐雾环境下X70管线钢等离子喷涂铝涂层的腐蚀行为. 表面技术. 2019(05): 85-89+107 . 百度学术
其他类型引用(4)
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