| 摘要: |
| 采用超音速火焰喷涂工艺制备了CoCrW涂层，测试了涂层的结合强度、硬度、孔隙率和高温抗氧化性能。试验结果表明，涂层的结合强度在57 MPa以上，硬度为545 HV0.1，孔隙率在2 %以下。涂层的抗氧化性能较好，涂层在850 ℃以下或经过较短时间热处理时，涂层氧化增重较少，而温度在850 ℃以上或经过较长时间热处理时，涂层氧化增重明显。在相同试验条件下与气体爆燃涂层、等离子涂层相比，用HVOF喷涂的涂层其耐磨性能最好。 |
| 关键词: CoCrW HVOF 结合强度 孔隙率 抗氧化性能 耐磨性 |
| DOI： |
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| Study on the Properties of HVOF Sprayed CoCrW Coating |
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YANG Zhong-yuan，ZHOU Jian-ping1,2
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1.Beijing general research institute for non-ferrous metals, Beijing 100088;2.Artillery institute of the Chinese People’s Liberation Army
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| Abstract: |
| The CoCrW coating was prepared by HVOF spraying in this paper. The bond strength, microhardness , porosity and oxidation resistance of HVOF sprayed CoCrW coating were investigated. The results showed that the bonding strength of HVOF sprayed CoCrW coating is over 57 MPa，the microhardness is up to 545 HV0.1，the porosity ratio is less than 2 %。The weight gain by oxidation is unconspicuous at temperature below 850 ℃，whereas，the oxidation of coating becomes obviously increased over 850 ℃. A comparision of wear resistance of CoCrW coatings prepared by D-gun spray，plasma spray and HVOF spray was also made at the same experimental conditions. HVOF sprayed CoCrW coating displayed the best wear resistance. |
| Key words: CoCrW HVOF bonding strength porosity oxidation resistance wear resistance |
