Study on Improving Method of Surface Durabilities of Steel Rollers by Surface-hardening : Comparison Between Tufftrided and Industrial Chromium Plated Rollers

概要

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In order to clarify the mechanism how the surface durability of steel roller is improved by surface-hardening, using tufftrided and industrial chromium plated steel rollers whose hardened layers are comparatively thin but whose mechanical characteristics of hardened layer and core are extremly different from each other, sliding-rolling contact fatigue tests were conducted. As the result, it was elucidated that by tufftriding, the surface durability is elevated over that of core steel, but industrial chromium plating is not expected to improve the surface durability, fatigue failure modes on both rollers are spalling, and [A(τyz/HV)] max can be employed as the index of the surface durability.
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