HEAT-RESISTANT SINTERED MATERIAL HAVING EXCELLENT OXIDATION RESISTANCE, WEAR RESISTANCE AT HIGH TEMPERATURES AND SALT DAMAGE RESISTANCE, AND METHOD FOR PRODUCING SAME

• Main Authors: KATO KENICHI, MIYAHARA MASAHISA, MIZUNO TATSUKI
• Format: Patent
• Language: Chinese; English
• Published: 01.12.2017
• Subjects: ALLOYS; CASTING; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WORKING METALLIC POWDER

The purpose of this heat-resistant sintered material and a production method thereof is to obtain a heat-resistant sintered material that has excellent oxidation resistance, wear resistance at high temperatures, and salt damage resistance. This heat-resistant sintered material is characterized by: having a composition that contains, in mass%, 25-50% of Cr, 2-25% of Ni and 0.2-1.2% of P, with the balance made up of Fe and unavoidable impurities; and having a structure that comprises an Fe-Cr matrix and hard phases that are dispersed within the Fe-Cr matrix and are composed of Cr-Fe alloy grains. This heat-resistant sintered material is also characterized in that: the Cr content in the Fe-Cr matrix is 24-41% by mass; the Cr content in the hard phases is 30-61% by mass; and the intercommunicating porosity is 2% or less. 在该耐热烧结材及其制造方法中，以得到抗氧化性、高温耐磨损性、耐盐蚀性优异的耐热烧结材为目的。该耐热烧结材的特征在于，具有以质量％计含有Cr：25～50％、Ni：2～25％、P：0.2～1.2％，余量由Fe和不可避免的杂质构成的组成；并具有具备Fe-Cr母相、和分散在所述Fe-Cr母相的内部的由Cr-Fe合金粒构成的硬质相的组织；所述Fe-Cr母相的Cr量以质量％计为24～41％，所述硬质