STEEL FOR USE IN MACHINE-CONSTRUCTION EXCELLENT IN MACHINABILITY
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Aug 8, 2014
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Aug 22, 2013
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Abstract
A steel for mechanical structures has a mixed texture which is composed of a hard phase comprising at least one texture selected from pearlite, bainite and martensite and a ferrite phase, wherein the average equivalent circle diameter of ferrite grains is 7 μm or less and the (ferrite grain)-(ferrite grain) connection rate (X) which is expressed by formula (1) is 0.15 or less.
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