The Study On Grind-hardening And Numerical Simulation Of42CrMo Steel

Grind-hardening technology is the new technology of heat treatment which is use of heatgenerated by grinding and mechanical effects on the surface of the part directly.It can begrinding and surface strengthening set as a whole.Thus, it eliminats processes of surface heattreatment, reduces energy consumption and production process and is full and effective use ofgenerated grinding heat in grinding.42CrMo steel were study in the papers.The author carrie out grind-hardening experiments inthe M7132A horizontal precision grinding machine by using corundum grinding wheel.Weanalysis organization and performance of sample in grind-hardening process by differentgrinding depths, different grinding speeds, different grinding wheel graininess and differentoriginal tissue.We determine to hardness of strengthened layer by HVS-10Vickers hardnesstester; We observe microstructureation of strengthened layer by SSX-550scanning electronmicroscope; The effect of strengthening and strengthening mechanism was discussed; The authorsimulates the grinding strengthen temperature field and predicts strengthened layer thickness byANSYS finite element analysis software.The results show that: Each factors that can make the sample to achieve the same effect withsurface hardening.The hardness values is up to824.2HV and the minimum of completestrengthened layer also enhances0.7mm; Grinding strengthened layer microstructure,microhardness and depth of strengthened layer are all met surface hardening requirements; Thesimulated temperature and measured temperatures are basically consistent.The predicted depth isbasically accurate. The model can be used for prediction of grinding strengthen temperature andprojections enhanced depth.