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针对宝钢2RH拉瓦尔喷嘴腐蚀失效,分析了喷嘴的化学成分和金相组织,以及CO2对喷嘴的腐蚀机理,分析结果表明,喷嘴的选材不当和真空系统的废气腐蚀冲刷是主要原因,根据工况条件选用了新的材料并采取了相应的措施。
Aiming at the corrosion failure of 2RH Laval nozzle in Baosteel, the chemical composition, microstructure and corrosion mechanism of CO2 nozzle are analyzed. The results show that the improper nozzle selection and erosion of the vacuum system are the main reasons. According to the working conditions Conditions selected new materials and take corresponding measures.