在役加氢反应器微试样现场取样可行性研究

发布时间：2018-03-22 23:40

  本文选题：小冲杆试验　切入点：表面取样　出处：《华东理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：小冲杆试验技术是以微型尺寸试样进行试验获取材料力学性能的技术。因其所需试样的尺寸非常小,能直接从在役设备上微损取样进行力学性能测试,从而为结构完整性评定和剩余寿命预测提供可靠的依据。本文针对在役加氢反应器的微损取样可行性进行研究,主要成果如下： (1)通过实验室模拟取样和检修现场对加氢反应器试块的取样,研究了电火花切割方法对加氢反应器取样的可行性。加氢反应器停工后外壁氢浓度为零,此种方法可以在检修期间完成对在役设备的取样,并且不会影响设备的安全运行。 (2)通过对2.25Cr-1Mo从室温到-196℃的小冲杆试验得出材料的韧脆转变温度。通过分析试验结果,认为取少于20片小冲杆试样可以完成对材料韧脆转变温度的评价,给出了最优的取样方案。 (3)确定在役加氢反应器取样位置和尺寸,并给出取样后的安全评定。
[Abstract]:The small punching rod test technique is a technique for obtaining the mechanical properties of materials by means of micro-size samples. Because the size of the samples required is very small, the mechanical properties can be tested directly from micro-loss samples on existing equipment. In order to provide a reliable basis for structural integrity assessment and residual life prediction, the feasibility of micro-loss sampling in in-service hydrogenation reactor is studied in this paper. The main results are as follows:. 1) the feasibility of sampling the hydrogenation reactor by EDM was studied by means of the laboratory simulated sampling and the sampling of the hydrogenation reactor at the maintenance site. The hydrogen concentration in the outer wall of the hydrogenation reactor was zero after the shutdown of the hydrogenation reactor. This method can complete the sampling of the equipment in service during maintenance and will not affect the safe operation of the equipment. (2) the ductile-brittle transition temperature of 2.25Cr-1Mo is obtained by the test of small punch rod from room temperature to -196 鈩，

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