DAMPING ALLOY

• Main Authors: NISHIMURA TOSHIYASU, KOBAYASHI SATORU, MARUYAMA TADAKATSU, SUGATA MASAHIRO, SUGIMURA SEIICHI, SEKIDO NOBUAKI, TSUZAKI KANEAKI, SAKURAYA KAZUYUKI, OGAWA KAZUYUKI, NAKAMURA TERUMI, FURUYA YOSHIYUKI, KUSHIBE ATSUMICHI, NAGASHIMA NOBUO, SAWAGUCHI TAKAHIRO, INOUE YASUHIKO, CHIBA YUYA
• Format: Patent
• Language: English; French; German
• Published: 04.11.2015
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

A damping alloy that is an Fe-Mn-(Cr, Ni)-Si-based damping alloy containing at least one of Cr or Ni or further contains Al, the damping alloy containing component compositions of: 5 mass% ‰¤ Mn ‰¤ 28 mass%; 0 mass% ‰¤ Cr ‰¤ 15 mass%; 0 mass% ‰¤ Ni < 15 mass%; 0 mass% < Si < 6.5 mass%; and 0 mass% ‰¤ Al < 3 mass%, the balance being Fe and inevitable impurities, wherein the component compositions satisfy the following conditions: [%Ni] + 0.5 [%Mn] > 0.75 [%Cr] + 1.125 [%Si] + 2 [%Al]; and 37 < [%Mn] + [%Cr] + 2 [%Ni] + 5 [%Al] < 45 (wherein [%Ni], [%Mn], [%Cr], [%Si], and [%Al] represent contents (mass%) of Ni, Mn, Cr, Si, and Al, respectively). Thus, a damping alloy for an elasto-plastic damper such as the Fe-Mn-(Cr, Ni)-Si-based alloy can be provided in which proof stress and stress amplitude after cyclic tension-compression deformation are lowered and the number of cycles to fracture is increased, the damping alloy being capable of being used in a maintenance-free manner even after long-period ground motion and being mass-produced.