Preparation and Tensile Properties of Novel Porous Plates Made by Stainless Steel Wire Mesh and Powder Composites

Abstract

Porous metal materials have important mechanical properties, and there are various manufacturing methods to produce them. In this paper, a porous, thin strip was fabricated by the composite rolling of stainless steel wire mesh and stainless steel powder. Then, a porous plate of stainless steel wire mesh and powder composite (SWMPC) was prepared by folding, pressing, and vacuum sintering the thin strip, and its structural characteristics and permeability were studied. The effects of the gap of the roller, gap of the powder box, number of layers by folding, and sintering parameters on the porosity and mechanical properties were also studied. The results indicated that the permeability increased with the increasing of porosity. Sintering parameters had a great influence on the mechanical properties. The larger the roll gap, the higher the porosity and the weaker the mechanical properties. As the gap of the powder box increased, the porosity decreased and the mechanical properties improved. The number of layers had no effect on the porosity. The first three stages of tensile curves of 10 and 15 layers were deformation stages and generally coincided, the time was short at the fracture stage. However, the mechanical properties got a raise when layers was 15.

Preparation, Microstructure and Impact Properties of a Novel Stainless Steel Porous Plate

“…In our previous work 49,50) we reported on manufacturing porous strip by horizontal rolling process that required wire mesh aperture to be smaller than powder size , thus powder could not fall out of mesh due to gravity, and porous strip was composed of powder-wire mesh structure. Differently, vertical rolling process was used in this work, particle size was smaller than wire mesh aperture so that powder could be pen-etrated into the other side of wire mesh by extrusion pressure, then the unique characteristic of powder-wire mesh-powder sandwich structure was obtained for improving the proportion of powder.…”