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本文概述了压力容器用中低强度钢的宽板试验结果。介绍了带中心缺口宽板试验的目的、方法和结果。首次在宽板上测到了缺口尖端的张开位移,确定了起裂点。试验数据表明:对常用的压力容器的中低强度钢,在缺口中心测到的张开位移,不能直接表明材料的断裂韧性。文章初步分析了COD设计曲线用于压力容器缺陷评定的可靠性,推荐了制定我国压力容器缺陷评定规范用的计算公式。
This article outlines the results of a wide panel test for low and medium strength steels for pressure vessels. The purpose, the method and the result of the test of the wide center with a notch are introduced. For the first time in the wide plate measured the notch open the top of the displacement, to determine the starting point. The experimental data show that for the medium-low-strength steels commonly used in pressure vessels, the open displacement measured at the notch center can not directly indicate the fracture toughness of the material. The paper preliminarily analyzed the reliability of COD design curve used for pressure vessel defect assessment, and recommended the formula for formulating the assessment standard of pressure vessel defect in our country.