| P91钢焊后过回火探讨 |
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| 引用本文： | 谢航云,张立新,周萍.P91钢焊后过回火探讨[J].热力发电,2010,39(3). |
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| 作者姓名： | 谢航云 张立新 周萍 |
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| 作者单位： | 1. 国电科学技术研究院,江苏,南京,210031
2. 国电菏泽发电厂,山东,菏泽,274032 |
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| 摘 要： | 在焊后热处理过程中,过回火会导致新型耐热钢P91钢的组织劣化,硬度和抗化学腐蚀性能降低。分析认为,P91钢过回火的主要原因是指导性文件或标准欠缺,以及恒温时间和降温速度不合理。讨论了P91钢焊接和焊后热处理工艺的有关问题,提出了在确保焊接接头的韧度和蠕变断裂强度的前提下,合理选择恒温时间和升、降温速度,防止产生过回火现象。
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| 关 键 词： | P91钢 焊后热处理 过回火 恒温时间 升降温速度 |
AN APPROACH TO OVER-TEMPERING AFTER WELDING OF P91 STEEL |
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| XIE Hang-yun,ZHANG Li-xin,ZHOU Ping.AN APPROACH TO OVER-TEMPERING AFTER WELDING OF P91 STEEL[J].Thermal Power Generation,2010,39(3). |
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| Authors: | XIE Hang-yun ZHANG Li-xin ZHOU Ping |
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| Affiliation: | XIE Hang-yun1,ZHANG Li-xin2,ZHOU Ping11.Guodian Science & Technology Research Institute,Nanjing 210031,Jiangsu Province,PRC2.Guodian Heze Power Plant,Heze 274032,Sh,ong Province,PRC |
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| Abstract: | In the heat treatment process after welding,over-tempering can lead to worsening of the texture concerning the new type heat-resistant steel,namely P91 steel,making the hardness and chemical corrosion resistant behavior of P91 steel to be reduced.The causes resulting in over-tempering of P91 steel have been analysed,it is believed that the causes are short of guiding document or standard,unresonable constant-temperature time and temperature-reducing rate.The problems related to heat-treatment technology aft... |
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| Keywords: | P91 steel heat treatment after welding over-tempering constant-temperature time temperature-rising and reducing rate |
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