PRODUCTION OF CORROSION-AND WEAR-RESISTANT SLIDING MATERIAL

摘要

PURPOSE:To produce a sliding material having the resistance to wear and corrosion by impregnating a water soluble chromium compd. into the pores of a green compact of an alloy steel, sintering the green compact and converting the chromium compd. to chromic oxide (VI). CONSTITUTION:The powder of the alloy steel such as stainless steel is pressed to prepare the green compact having the pores sized about 1-10mu. The water soluble chromium compd. (chromic phosphate, etc.) is impregnated into the part of the green compact to be used as a sliding surface and is held for about 10min in a high-pressure chamber in which about 9.5kg/cm<2> pressure is maintained. The compact impregnated with the chromium compd. soln. is held for about 30min at about 400 deg.C to reduce the chromium compd. to the hard chromium oxide (VI). The compact is further sintered in the high vacuum or reducing gaseous atmosphere at the temp. lower than the m.p. of the respective materials to intensity the mechanical strength of the compact.