煤气瓶耐压试验漏气原因分析

为了探究某HP295钢制煤气瓶耐压试验漏气原因,对漏气煤气瓶进行了宏观观察,找出漏气部位,采用扫描电镜观察、金相分析等方法对缺陷部位进行了分析。结果显示,漏气部位均位于瓶腰焊缝附近,对于制瓶的冲压钢板而言,开裂部位位于钢板的剪切边;裂纹周围未观察到聚集分布的夹杂物及脱碳现象,缺陷部位及正常部位组织均为铁素体+珠光体。分析表明,原料钢板剪切开裂及试压漏气是由剪切设备故障导致剪切边存在较长裂纹造成,应及时对剪切设备进行检修维护,保持设备正常工作状态,避免剪切边产生较长裂纹。

Leakage Cause Analysis of Gas Cylinder Withstand Pressure Test

In order to explore the leakage reason of HP295 steel gas cylinder withstand pressure test, the macroscopic observation of leakage gas cylinder was conducted, found the leakage point. It adopted the methods of scanning electron microscope, metallographic analysis and so on to analyze defective parts. The results showed that the leakage parts located near the weld of cylinder waistline, and the cracking area of the stamping cracking plate also located in the shear edge of steel plate; the aggregated distribution inclusions and decarburization were not be observed around the cracks, and microstructure of defect locations and normal locations both were ferrite and perlite. The analysis results indicated that the raw material steel plate shear crack and pressure testing leakage caused by the long crack in shear edge, which caused by shear equipment failure. It should timely conduct repair and maintenance to shear equipment, so as to keep normal working state of equipment and avoid generating long cracks in shearing edge.