Explosion Cracking Reason Analysis of Water-cooling Tube of Power Plant Boiler

A comprehensive analysis which was based on chemical composition analysis and metallographic examination was made on the exfoliation cracking of water-cooling tube of power plant boiler. The result showed that the exfoliation cracking of water-cooling tube was mainly caused by shout-time sudden overheating because of the reasons of foreign matter blockage and so on, which made the strength of the matrix material decrease drastically and induced the exfoliation cracking of the tube.