Aiming at the actual use of sleeve for blast furnace tuyere and the main failure mode in use

the methods were put forward for adopting the high temperature resistant alloy in the inner wall by arc deposition process and plasma spraying process of high-temperature ceramic materials in the outlet wall.By proposing the material of the transition layer as JSTNi6382 and the surface as D450

the microstructure

micro-hardness

wear resistance and thermal shock resistance of the cladding layer were analyzed.The micro-hardness was measured along the deposition direction of strengthening equidistant samples.The results reveal that the micro-hardness of the sample along deposition direction exhibits gradient increase.The wear tests show that the wear resistance of D450 is 5.8times of copper and D600 is 17times of copper at room temperature.Experimental results show that the thermal shocking resistance of the sample by HDMR process is far superior to that of one by plasma spraying.