共查询到18条相似文献,搜索用时 46 毫秒
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本文介绍了SA-335P91材料的应用前景、SA-335P91集箱的结构及焊接难点,焊接工艺试验,焊接工艺措施及SA-335P91集箱焊接工艺在实际生产中的应用情况等。 相似文献
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T91管屏埋弧焊裂纹分析及焊接试验 总被引:1,自引:0,他引:1
介绍了T91钢用于炉膛膜式管屏的埋弧焊焊接过程中出现的典型裂纹,综合各种因素对裂纹的形成原理进行了分析.通过试验证实对于拘束应力大的T91管屏,埋弧焊拼排可通过多层焊获得合格的T91管屏.按此工艺生产多台CFB锅炉T91管屏,投运锅炉运行情况良好. 相似文献
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随着SA-335P91钢在电站锅炉中的广泛应用,SA-335P91钢的焊接问题备受关注。本文介绍了SA-335P91钢的性能特点和焊接性,阐述了SA-335P91钢的焊接过程中的问题,探讨可以保证良好的焊接质量前提下SA-335P91钢的焊接要点。 相似文献
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主要介绍了SA-213T91的焊接技术,分析了SA-213T91的焊接性能和实际焊接过程中应注意的问题。 相似文献
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某热压三通P91用水压机进行冷校时开裂成两半,在断口上有一处裂纹缺陷,我们在裂纹缺陷处取纵向试样进行了化学成分、力学性能和金相组织的测定,找出了造成P91三通冷校开裂的主要原因,另外采用冷校工艺也不合理。 相似文献
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T91/P91钢管在电站锅炉应用中的质量控制要点 总被引:3,自引:0,他引:3
近年来,T91/P91材料已逐渐在电站锅炉上得以广泛应用。讨论了该材料应用于电站锅炉时,在生产过程中原材料、焊接、热处理及冷热加工等各质量指标的控制要求。 相似文献
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Results of small punch tests on miniaturized thin discs of P91 steel are compared with relevant conventional tests on bulk specimens. Small punch tests under constant displacement rate were performed at room temperature and 873 K. The results were correlated with results of conventional stress–strain tests. Results of small punch tests under constant force were compared with results of conventional creep tests at temperatures of 823, 848 and 873 K. It is shown that there are simple empirical relationships between the parameters determined from small punch and conventional tests. Some problems in the method for performing small punch tests are also presented and discussed. 相似文献
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T/P91钢焊接质量控制至关重要,从影响焊接质量的5个因素着手,结合多年来的焊接实践经验,分别阐述了人员、设备、材料、工艺、环境等方面的控制要点,指出了容易产生缺陷的关键点,并对不同焊接方法的质量控制过程进行了详述,分析了焊接工艺对接头性能的影响,最后对预防和消除不合格焊缝提出了控制措施. 相似文献
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介绍了SA-213T91在锅炉中的使用情况,阐述了T 91加工、弯曲、焊接性能。重点介绍了该材料在现场常见问题的处理方法,并通过金相组织分析介绍了该材料在实践中的应用情况。 相似文献
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Finite-element creep damage analyses of P91 pipes 总被引:1,自引:0,他引:1
T.H. Hyde A.A. Becker W. Sun J.A. Williams 《International Journal of Pressure Vessels and Piping》2006,83(11-12):853
In this paper, uniaxial and notched bar creep test data are used to establish the material behaviour models for two P91 steels of differing strength. The two steels are denoted here as Bar 257 steel, tested at 650 °C and A-369 steel, tested at 625 °C. Single-state variable and three-state variable creep damage constitutive models were used in the investigation.Methods for determining the material properties in the two sets of equations are briefly described. Finite-element analyses are performed using these material properties for a P91 pipe, subjected to internal pressure and end loading. The failure lives of the pipe were obtained, and on this basis, a preliminary assessment of using the two different sets of constitutive equations for failure predictions of high-temperature components under creep damage conditions can be made. 相似文献