Abstract
This paper was devoted to presenting a systematic approach based on finite element method to numerical analysis of gear surface hardening with the consideration of the contact problem. After the contact finite element method theory of gear and rack was introduced, the numerical analysis of gear surface hardening was discussed in detail. The element selection of gear–rack hardening layer based on finite element method was proposed, the algorithm characteristics of gear–rack elastic–plastic contact problems were also put forward, and the material properties and constitutive relations of gear–rack hardening layer were then discussed in detail. The gear–rack elastic–plastic contact analysis results were discussed, and the experimental results with the laser treatment were analyzed with the microstructure changes of the laser hardening layer to measure the performance of the hardening layer. The wear simulating test of gear results in improving the wear resistance greatly, and this surface hardening treatment has been officially put into engineering application.
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