Formation of abrasion resistant covering layer

Abstract

Abstract PURPOSE:To develop sliding members having covering layers of excellent abrasion resistance, seizure resistance and contact fatigue resistance by coating powder of an Ni-Cr or Ni-Cr-Co alloy contg. B, C, Si, Fe on the surface of a metallic base material and melt-sticking the powder to said surface then sintering the material under high pressure. CONSTITUTION:In the stage of producing sliding members, powder of an Ni-Cr alloy or Ni-Cr-Co alloy contg. 1-4% B, 3-5% Si, 4-5% Fe, 0.6-0.9% C is mixed with carboxymethylcellulose salt or the like as a binder and water to prepare paste and the resultant paste is coated on the surface of cast steel or stainless steel as a base material. The coating is heated by electron beams or the like to be melt-stuck and capsuled; thereafter the material is put in a high pressure vessel and is sintered under high temp. and high pressure in an inert gaseous atmosphere, whereby the covering layers of high density and less segregation are formed. Finally the material is heat-treated in a pressurized state to form the structure wherein hard particles such as intermetallic compds. are uniformly dispersed.

Inventors

• 👤 Michio Sato
• 👤 道雄 佐藤

Bibliographic Details