Stainless steel powder for injection forming and production of compound for injection forming and stainless steel sintered body

Abstract

Abstract PURPOSE:To produce stainless steel powder having excellent injection formability and a sintered body made of this by atomized-pulverizing high carbon stainless steel melted by adding carbon in the stainless steel. CONSTITUTION:At the time of manufacturing the stainless steel powder for manufacturing the sintered body made of powder metallurgy by atomized- pulverizing the molten stainless steel, the carbon is added to the molten stainless and by making the high carbon stainless steel having 0.1-1.0wt.% C, the powder based on the atomizing method is made to the spherical powder having <=20mum average particle size. Organic binder of thermoplastic resin or wax, etc., is added to this stainless steel powder as binder and kneaded and after making the compound for injection-forming of this, the injection-formation is executed to be the desired shape. The product is heated under N2 atmosphere and after degrease-treating the binder, this is heated at high temp. under hydrogen atmosphere or high degree of vacuum and sintered. C in the binder and C in the stainless steel powder body are removed and the sintered body with the ordinary low carbon stainless steel powder can be produced.

Inventors

• 👤 Sadakimi Kiyota
• 👤 禎公 清田
• 👤 Minoru Nitta
• 👤 稔 新田
• 👤 Yukio Makiishi
• 👤 槙石　幸雄

Bibliographic Details