| 超超临界机组合金钢水冷壁安装焊接裂纹的分析 |
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| 引用本文： | 马坤,马彦喜.超超临界机组合金钢水冷壁安装焊接裂纹的分析[J].防灾减灾工程学报,2018(1):66-69. |
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| 作者姓名： | 马坤 马彦喜 |
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| 作者单位： | 西安西工大超晶科技发展有限责任公司,陕西西安 710032;银川大学,宁夏银川 750001 |
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| 摘 要： | 随着火力发电厂机组容量和参数的提高,超超临界机组的水冷壁管大量使用合金钢材料,近年来在我国北方寒冷地区冬季施工中,超超临界机组合金钢水冷壁安装施工中发生多起焊接裂纹事件,严重影响了工程质量和进度。本文通过对12Cr1MoV钢水冷壁管焊接工艺,环境温度,焊前预热,焊接接头的金相组织,焊接裂纹的形态等方面进行了综合分析,找到了焊接裂纹产生的原因,提出了预防裂纹产生的措施。
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| 关 键 词： | 合金钢 水冷壁管 裂纹 预防措施 |
Analysis on welding crack in alloy steel water - cooled wall installation of the ultra supercritical boiler units |
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| MA Kun,MAY anxi.Analysis on welding crack in alloy steel water - cooled wall installation of the ultra supercritical boiler units[J].Journal of Disaster Prevent and Mitigation Eng,2018(1):66-69. |
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| Authors: | MA Kun MAY anxi |
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| Institution: | Xian Super Crystal Science & Technology Development Co , Ltd ,Xian Industry University, Xian Shaanxi 710032 , China; Y inchuan University, Yinchuan Ningxia 750001 , China |
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| Abstract: | With the improvement of units capacity and parameters of the coal fired power plant, the alloy steel materials are wildly applied in water-cooled wall tubes of the ultra supercritical boiler u- nits, so several welding crack failures happened during the alloy steel water-cooled wall installation of the ultra supercritical boiler units in winter construction in North cold area, which seriously influ- enced the project quality and progress. By the comprehensive analysis of welding process , environmen- tal temperature , preheating before welding , metallographic organization of the welding joint and the form of the welding crack, the causes of the crack were found out, the measures of crack prevention were presented. |
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