金属波纹管膨胀节具有热补偿功能,应用越来越广,同时其失效开裂问题也日益显现.为此,从宏观形貌、化学成分、金相显微组织、SEM微现形貌方面,对开裂的Incoloy 800波纹管膨胀节进行了分析.结果表明,波纹管膨胀节开裂的原因是高轴向拉应力条件下的材料失稳破裂,并提出了相应的改进措施.
The causes leading to cracking of the expansion joints of Incoloy 800 bellows were investigated in relation to analyses of macromorphology, chemical composition, metallographic structure, and micromorphology of fractured surfaces by scanning electron microscopy. The measures for modification were suggested. Resulta show that the cracking of the expansion joints of Ineoloy 800 bellows may be attributed to destabilization rupture caused by high axial tensile stress.
参考文献
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