Failure Analysis of the Outside Coating on the Furnace Roller
A failure case of the outside coating on the furnace roller is presented in this study.The coating consists of WC-Co,which is deposited on 45 steel by High Velocity Oxygen Fuel (HVOF) spraying.The spalling of coatings has been found in the middle of the roller.Rust was also observed on the coatings of the roller.The failure analysis of the coating was performed in terms of composition analysis,and microstructure observation etc.In addition,the effects of different sandblasting post-treatments were compared.And the effect of substrate material is investigated on the corrosion of coatings.It was concluded that the sandblasting particles remained on the substrate surface have effects on the failure of the coating.The peeling-off coating on the roller is also related with the formation of iron oxides.Less sand can be remained on the substrate surface when air purging and brushing is used after the sand-blasting compared with air purging or non-treatment is applied.The stainless steel shows more excellent corrosion resistance than the low carbon steel when they are used as substrate for WC-Co coatings.
Failure analysis Furnace roller WC-Co coating Corrosion Wet/dry cyclic corrosion test
Zheng-Qu Feng Lu Wang Wei-Ze Wang Kai-Di Cheng Cheng-Zhou Chen
Key Laboratory of Pressure System and Safety,Ministry of Education,East China University of Science Baosteel and NSC Automotive Steel Sheets Co.,Ltd.,Shanghai 200941,China
国际会议
2016 International Symposium on Structural Integrity，ISSI—2016(2016国际结构完整性研讨会)
天津
英文
431-435
2016-05-26（万方平台首次上网日期，不代表论文的发表时间）