| 摘要 |
PROBLEM TO BE SOLVED: To provide a material having high toughness and high strength by constituting a high damping alloy so that it has a composition containing specific weight percentages of C, Si, Mn, P, S, Cr, Al, and N and having the balance Fe. SOLUTION: The high damping alloy has a composition consisting of, by weight, <=0.02% C, 0.01-0.5% Si, <0.2% Mn, <=0.01% P, <=0.005% S, <0.5% Cr, 0.06-3.5% Al, <=0.006% N, and the balance Fe with inevitable impurities. Further, one or more elements among Cu, Ni, Mo, Nb, V, Ti, B, Ca, and REM can be added. The alloy is heated to 1000-1150 deg.C, hot-rolled under the conditions of 30-70% draft at <=930 deg.C and 830 deg.C rolling finishing temp., and then heat- treated, by which crystalline grain size and (200) diffraction intensity ratio are regulated to <=120μm and >=3.0, respectively. By this method, the steel excellent in damping property can be provided.
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