Preparation, microstructure, three-point bending strength and permeability of a vacuum sintering porous plate

The mechanical properties of porous materials made from metal powder rolling are generally low. In order to improve low bending properties of porous materials, wire mesh was used as reinforcement, vertical rolling, folding, pressing and sintering were adopted to prepare Stainless steel metal powder and wire mesh composite porous plate (SWMCP). The influences of vacuum sintering temperature, ultrasonic generator frequency and roll gap on microstructure and bending properties were studied. Bending behaviour and fracture morphology were also observed. The results revealed that the porous strip had unique characteristic of a powder-wire mesh-powder sandwich structure. Vacuum sintering temperature played a key role in preparing process. Samples sintered at 1330 degrees C got better metallurgical bonding quality and superior flexural strength than 1130 degrees C and 1230 degrees C. Quicker ultrasonic frequency and roller gap was 0 mm also brought better bending properties. The prepared SWMCP possessed excellent flexural strength and possibility of application.