Effect of Isothermal Heat Treatment on Mechanical Properties of WC-17Co Coatings |
| |
Authors: | Ding Kunying Wang Lijun Sun Zhen Liu Yankuan |
| |
Affiliation: | Tianjin University, Tianjin 300072, China,Tianjin University, Tianjin 300072, China,Civil Aviation University of China, Tianjin 300300, China and Civil Aviation University of China, Tianjin 300300, China |
| |
Abstract: | WC-17Co cermet coatings were deposited on Ni718 alloys using the high-velocity oxygen fuel (HVOF) technique. These coatings were then heat treated by different processes (150?°C, 10?h; 300?°C,?10?h; 450?°C,?10?h). The effects of heat treatment on microhardness, elasticity modulus, and fracture toughness were studied by an indentation method. The residual stresses of the coated specimens were evaluated by the Almen strip method. The results show that the phase constitution and the structure of the WC-17Co coatings exhibit no obvious change in 150, 300, and 450 °C heat-treatment. The microhardness, elasticity modulus, and fracture toughness of the WC-17Co coatings decrease with the increase of heat treatment temperature. The descent tendency of the mechanical properties is attributed to the decline in compressive residual stresses after isothermal heat treatment. |
| |
Keywords: | WC-17Co isothermal heat treatment mechanical property compressive stress |
本文献已被 CNKI 等数据库收录! |
| 点击此处可从《稀有金属材料与工程》浏览原始摘要信息 |
|
点击此处可从《稀有金属材料与工程》下载全文 |
|