Title: Surface Strengthening Process and Properties of Cu Alloy Mold of Level Continuous Caster
Abstract: Taking Ni-Cr-Ti wire as spraying material,Ni-based coating was prepared using arc spraying system.The arc spraying process was optimized by orthogonal experiment design with the utilization of anchoring strength and using strength level as the criterion.The optimized process parameters of the arc spraying Ni-Cr-Ti coating were obtained.The effects of arc spraying process on microstructure,achoring strength between matrix and coating,hardness,thermal shock resistance of the coating were tested.The microstructure of the coating was studied by SEM,EDS.The results show that the optimized processing parameters of the arc spraying Ni-Cr-Ti coating are spray current 140 A,spray voltage 35 V and spray distance 150 mm.Spray voltage,spray current,spray distance have different effect on the anchoring strength of Ni-Cr-Ti coating under constant air pressure,and the higher the anchoring strength,the better the thermal shock resistance.The highest strength 34.1 MPa of Ni-Cr-Ti coating can be obtained using the optimized parameters,and the coating has no cracks or spalling after thermal shock 41 times.The coating displays good properties,has the typical layer structure characteristic and good thermal shock resistance,the highest hardness reaches 390.65 HV.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot