Effect of post-heat treatment on the creep behaviour at 550°C of NiCr+Cr3C2 coating produced by HVOF on the SUS 304 substrate

2nd Mineral Processing and Technology International Conference

工业技术（总论）;矿业工程

Martides, E.^1 ; Rijaluddin, A.^2 ; Prajitno, D.H.^3 ; Junianto, E.^1 ; Prawara, B.^1

Research Center for Electrical Power and Mechatronics, LIPI, Indonesia^1

Metallurgical Engineering, UNJANI, Indonesia^2

Science Center and Nuclear Technology Application, BATAN, Indonesia^3

关键词: Argon atmospheres;    Austenitic stainless;    Elevated temperature;    Feedstock materials;    High velocity oxygen fuel(HVOF);    Microstructure hardness;    Post heat-treatment;    Surface coatings;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/478/1/012031/pdf
DOI  :  10.1088/1757-899X/478/1/012031

学科分类：工业工程学

来源: IOP

【 摘 要 】

Austenitic Stainless Steel Grade 304 which is used for power plants boiler pipes often occurs creep phenomenon that caused a decrease in performance due to work at elevated temperatures. Surface coating of SUS 304 with Metal Matrix Composites Coating feedstock material 60%NiCr + 40%Cr3C2 is deposited using high-velocity oxygen fuel (HVOF) technique. The post-annealing process at 600°C at an argon atmosphere, holding time for 3 hours, and cooling in the furnace. Creep resistance test was carried out at a temperature of 550°C with a load of 54 kg for 10080 hours on three specimens, i.e non-spray, as-spray, as-annealed, then followed by microstructure hardness testing and porosity observation. As-annealed specimens were assessed that the lowest creep resistance value, increased hardness in the coating and substrate and decreased the percentage of porosity in the coating.