Influence of Sintering Temperature on Hardness and Wear Properties of TiN Nano Reinforced SAF 2205

4th International Conference on Mechanical, Materials and Manufacturing

材料科学;机械制造

Oke, S.R.^1,2 ; Ige, O.O.^1,3 ; Falodun, O.E.^1 ; Obadele, B.A.^1 ; Mphalele, M.R.^1 ; Olubambi, P.A.^1

Centre for Nanoengineering and Tribocorrosion, School of Mining, Metallurgy and Chemical Engineering, University of Johannesburg, Doornfontein Campus, Johannesburg, South Africa^1

Department of Metallurgical and Materials Engineering, Federal University of Technology Akure, PMB 704, Ondo State, Nigeria^2

Department of Materials Science and Engineering, Obafemi Awolowo University Ile-Ife, Osun State, Nigeria^3

关键词: Dispersion strengthened;    Duplex stainless steel;    Fine precipitates;    Mechanical properties at high temperatures;    Optimum properties;    Second phase particles;    Sintering parameters;    Sintering temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/272/1/012030/pdf
DOI  :  10.1088/1757-899X/272/1/012030

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Conventional duplex stainless steel degrade in wear and mechanical properties at high temperature. Attempts have been made by researchers to solve this problems leading to the dispersion of second phase particles into duplex matrix. Powder metallurgy methods have been used to fabricate dispersion strengthened steels with a challenge of obtaining fully dense composite and grain growth. This could be resolved by appropriate selection of sintering parameters especially temperature. In this research, spark plasma sintering was utilized to fabricate nanostructured duplex stainless steel grade SAF 2205 with 5 wt.% nano TiN addition at different temperatures ranging from 1000 °C to 1200 °C. The effect of sintering temperature on the microstructure, density, hardness and wear of the samples was investigated. The results showed that the densities and grain sizes of the sintered nanocomposites increased with increasing the sintering temperature. The microstructures reveal ferrite and austenite grains with fine precipitates within the ferrite grains. The study of the hardness and wear behaviors, of the samples indicated that the optimum properties were obtained for the sintering temperature of 1150 °C.