本文選題：小沖桿試驗　切入點：表面取樣　出處：《華東理工大學》2015年碩士論文　論文類型：學位論文

【摘要】：小沖桿試驗技術是以微型尺寸試樣進行試驗獲取材料力學性能的技術。因其所需試樣的尺寸非常小,能直接從在役設備上微損取樣進行力學性能測試,從而為結構完整性評定和剩余壽命預測提供可靠的依據。本文針對在役加氫反應器的微損取樣可行性進行研究,主要成果如下： (1)通過實驗室模擬取樣和檢修現(xiàn)場對加氫反應器試塊的取樣,研究了電火花切割方法對加氫反應器取樣的可行性。加氫反應器停工后外壁氫濃度為零,此種方法可以在檢修期間完成對在役設備的取樣,并且不會影響設備的安全運行。 (2)通過對2.25Cr-1Mo從室溫到-196℃的小沖桿試驗得出材料的韌脆轉變溫度。通過分析試驗結果,認為取少于20片小沖桿試樣可以完成對材料韌脆轉變溫度的評價,給出了最優(yōu)的取樣方案。 (3)確定在役加氫反應器取樣位置和尺寸,并給出取樣后的安全評定。
[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，

本文編號：1650950