| 摘要 |
PROBLEM TO BE SOLVED: To provide an iron alloy having high yield strength and tensile strength, extremely low work-hardening rate and excellent ductility, corrosion resistance and oxidation resistance. SOLUTION: The low work-hardening iron alloy has a composition which is in a region A enclosed with lines connecting four points in a diagram (shown in a figure) of Cr equivalent represented by [Cr equivalent(%)=(Cr%+1.21Mo%+0.48Si%+2.48Al%)] (by mass, the same applies to the following) versus Ni equivalent represented by [Ni equivalent(%)=(Ni%+0.11Mn%-0.0086(Mn%)<SP>2</SP>+24.5C%)] and has the balance Fe with inevitable impurities. This alloy is a ferromagnetic material having≥10 emu/g saturation magnetization and has <16 MPa/% work-hardening rate at the application of 10% strain in the tensile stress-strain curve. COPYRIGHT: (C)2007,JPO&INPIT
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