A STUDY OF THIN WALL POROUS TUBES PRODUCED BY COLD ROLLING OF STAINLESS STEEL POWDER

The present paper studies processes for producing porous stainless steel tubes by rolling stainless steel powder and followed by sintering, winding, welding, etc.The gas atomized stainless steel shots having a particle size over 5mm were crushed into powders of -100+250mesh by Eddy rotary mill. The thickness of stainless steel tube was 0.8-1.2mm. The average diameter of the pores of porous stainless steel tubes was 6 to 15μm. The relative permeability of the porous stainless steel tube for nitrogen was (3~7)×10^-3L·N/cm²·min·mmH₂O.