Influence of Hardenability of Material on Gear Distortions Caused by Hardening : 2nd Report, Through-hardening of Spur Gears Made of Low-alloyed Steels

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概要

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• Gears made of four kinds of low-alloyed steels with different hardenabilities were through-hardened in a cooling oil to investigate an influence of hardenability on gear distortions which is considered as a criterion for thickness of hardened layer. From the experiment, the gear distortions caused by the hardening are found to be related not only with the hardenability of the material, but also with the residual strain of dilatation curve. The reason why the gear distortions caused by through-hardening are not related only with the hardenability is in the existence of retained austenite. And there is a relationship between the product of ideal critical diameter and the residual strain on the dilatation curve, and the gear distortions caused by through-hardening. Moreover it is clear that grain size changed through annealing process affects gear distortions.

• 一般社団法人日本機械学会の論文

著者

• Fujio Hiroshige

  Kyoto University Faculty Of Engineering

• Yamada Koji

  Sumitomo Electric Industry Co. Ltd.

関連論文

• Theoretical Calculation of Residual Stress in Case-Hardened Gears with Different Thicknesses of Hardened Layer
• Influence of Hardenability of Material on Gear Distortions Caused by Hardening : 2nd Report, Through-hardening of Spur Gears Made of Low-alloyed Steels

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