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我所在液化石油气汽车罐车检验中发现一些A412F-2.5-12型安全阀弹簧断裂(有的安全阀仅使用半年),导致安全阀失效。该弹簧材料为60Si2MnA,弹簧丝规格为ф13mm。为找到弹簧断裂原因,选取具有代表性的断裂件进行理化检验,对其断裂原因进行了分析。1试验与结果1.1化学成分在弹簧断裂部位取样进行材料化学成分分析,其结果如表1所示,符合标准的要求。
In my liquefied petroleum gas truck tanker inspection, some type A412F-2.5-12 safety valve springs were broken (some safety valves only used for half a year), causing the safety valve to fail. The spring material is 60Si2MnA, spring wire size ф13mm. In order to find out the cause of the spring fracture, a representative fracture was selected for physical and chemical tests, and the fracture reason was analyzed. 1 Tests and results 1.1 Chemical composition Sampling of the spring fracture site for chemical analysis of the material, the results shown in Table 1, in line with the standard requirements.