Papers by Author: Chun Jiang Kuang

Abstract: Nitrogen alloying in steel may greatly increase the strength and corrosion resistance of the material. This paper introduced some research results of high nitrogen stainless steel (HNS) investigation via PM process. Nickel free high nitrogen stainless steels (17Cr12Mn2MoN) and superaustenitic high nitrogen stainless steels (28Cr6Mn2/6Mo10/20NiN) were investigated via gas atomization and HIP processes. Nitrogen alloying behavior during atomization and consolidation processes was investigated. Powders with nitrogen content up to 1% were manufactured by gas atomization process. Nickel free high nitrogen stainless steels with nitrogen up to 0.6% exhibits high strength and ductility at as-HIPed and solution annealed state, and superaustenitic HNS with nitrogen content up to 1% showed very high strength and good ductility at solution annealed state, with b at 1100 MPa, s at 810 MPa and elongation of 43%. PM HNS exhibited excellent corrosion resistance.

Abstract: Hot gas filtration and purification is widely applied in many industrial fields, such as in power generation industry, chemical and petrochemical industry, metallurgical industry, ceramic and glass industry, environmental protection industry, etc. Gas filtration at high temperature from industrial processes offers various advantages such as increasing process efficiency, improving heat recovery and materials resource recovery, protection of downstream plant equipment, etc. At the same time, it is an advanced environment protection technology. This paper describes a newly developed metallic filter element - sintered Fe3Al intermetallics. The manufacturing process of sintered Fe3Al metallic powder and the mechanical and filtration characteristics of this filter element were investigated. In this work, the mechanism of the morphological and phase constituent changes of the Fe3Al powder during sintering were studied. The newly developed filter elements were found to have excellent corrosion resistance, good thermal resistance, high strength and high filtration efficiency. Based on these results, the potential application of the sintered Fe3Al filter elements in industrial hot gas filtration are discussed.

Abstract: Porous metal materials have been widely used in various industrial fields in the world. This paper describes the recent research achievements of CISRI in the development of porous metal materials. High performance porous metal materials, such as large dimensional and structure complicated porous metal aeration cones and tube, sub-micron asymmetric composite porous metal, metallic membrane, metallic catalytic filter elements, lotus-type porous materials, etc, have been developed.