초록 ▼

A method of making filtering material from powdered steel whereby said powdered steel is cold rolled into strip and the latter undergoes a two-stage sintering process. The material produced by this method is intended for filtering fluids such as liquid fuel or brake fluid and is capable of retaining

A method of making filtering material from powdered steel whereby said powdered steel is cold rolled into strip and the latter undergoes a two-stage sintering process. The material produced by this method is intended for filtering fluids such as liquid fuel or brake fluid and is capable of retaining mechanical particles of the order of 2-3 microns.

대표청구항 ▼

A method of making filtering metal material whereby powdered austenitic stainless steel ground into particles 10 to 30 microns is cold rolled to a strip form by being passed between mill rolls spaced 0.08 to 0.12 mm apart and rotating at a speed of 2 to 4 revolutions per minute, the strip material s

A method of making filtering metal material whereby powdered austenitic stainless steel ground into particles 10 to 30 microns is cold rolled to a strip form by being passed between mill rolls spaced 0.08 to 0.12 mm apart and rotating at a speed of 2 to 4 revolutions per minute, the strip material so produced undergoing a two-stage sintering process wherein the first stage of sintering is carried out in a reducing atmosphere at a temperature of 820°to 880°C for 2 to 3 hours and is followed by cooling down to 100°C in a reducing atmosphere and the second stage of sintering is carried out in a reducing atmosphere at a temperature of 1100°to 1150°C for 2 to 4 hours and is followed by cooling in a reducing atmosphere. A filtering metal material consisting essentially of powdered austenitic stainless steel ground into particles 10 to 30 microns with interstitial spacing sufficient to retain particles of the size of 2-3 microns at elevated temperatures of up to 600°C, said material being cold rolled to a strip form by being passed between mill rolls and having a filtering capacity of 0.004-0.006 1/cm2/min., a tensile strength of 11-13.5 kg/cm2, a strip thickness Of 0.15-0.18 mm., and a porosity ranging from 25-30 percent.