モリブデン省略鋼について
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概要
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From the view point of saving recources, the reduction of alloying elements, such as molybdenum (Mo), in steels is an important and urgent project.Saving molybdenum in machine structural steels, especially in steels for automobile components, had not been achieved up to now, because Mo has distinct effects on structural steel properties, such as hardenability, case hardenability, temper embrittlement, softening on tempering and so on.Recently Daido Steel Co., Ltd. has succeeded in saving Mo in Cr-Mo steels after metallurgical analysis on the effects of various alloying elements and through precisely controlled processing named “FINE METALLURGY”.In this report, three new steels are introduced-a boron steel, which replaces medium carbon Cr-Mo high-strength steels, and a low molybdenum Mn-Cr and a Mn-Cr steels which replace Cr-Mo carburizing steels.
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