Influences of gas flow rates on melting of particles of HVOF sprayed CoCrW coating and coating properties
来源期刊：Rare Metals2004年第1期
论文作者：YANG ZhongyuanGeneral Research Institute for Non-ferrous Metals, Beijing , China
文章页码：53 - 58
摘 要：<正> This paper discussed influences of flow rates of O2, C3H8, and compressed air on the melting degree of particles during HVOF （high velocity oxy-fuel） sprayed CoCrW coating. The O2 flow rate has the maximal effect on the melting of particles, the C3H8 flow rate has the second, and the compressed air flow rate has the minimal effect. The bond strength of the HVOF sprayed CoCrW coating is over 54 MPa. The porosity ratio of the HVOF sprayed CoCrW coating after optimization of gas flow rates is less than 2%. The average microhardness of the coating is up to HV0.1 545. The oxidation amount per unit area of the HVOF sprayed CoCrW coating increases with the holding time increasing at 800℃. In the same way, the oxidation amount of the coating increases as the temperature increases. Particularly, the oxidation of the coating drastically increases over 850℃.
摘要：<正> This paper discussed influences of flow rates of O2, C3H8, and compressed air on the melting degree of particles during HVOF （high velocity oxy-fuel） sprayed CoCrW coating. The O2 flow rate has the maximal effect on the melting of particles, the C3H8 flow rate has the second, and the compressed air flow rate has the minimal effect. The bond strength of the HVOF sprayed CoCrW coating is over 54 MPa. The porosity ratio of the HVOF sprayed CoCrW coating after optimization of gas flow rates is less than 2%. The average microhardness of the coating is up to HV0.1 545. The oxidation amount per unit area of the HVOF sprayed CoCrW coating increases with the holding time increasing at 800℃. In the same way, the oxidation amount of the coating increases as the temperature increases. Particularly, the oxidation of the coating drastically increases over 850℃.
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