| CALCULATION OF 3-D TRANSIENT TEMPERATURE FIELD DURING LASER TRANSFORMATION HARDENING PROCESS |
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| 作者姓名： | L. W Zhang R.S. Wang J. Th.M.De Hosson Y.L. Xia and F. G. Wang The State Key Lab. for Materials Modification by Laser Ion and Electron Beams Dalian University of Technology Dalian China |
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| 作者单位： | L. W Zhang，R.S. Wang，J. Th.M.De Hosson，Y.L. Xia and F. G. Wang 1) The State Key Lab. for Materials Modification by Laser，Ion and Electron Beams，Dalian University of Technology，Dalian 116023，China 2) Department of Applied Physics，University of Gro |
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| 摘 要： | 1.IntroductionLasertransformationhardeningprocessisathreedimensiontransientheattransferproblemwhichinvolvesinphajsetransformation,heatconduction,heatconvectionandheatradiation.Thecalculationoftemperaturefieldoflasertransformationhardeningprocessisaprerequisitetotheoptimizationofparametersoflasertransformationhardening.Thisworkstartedintheearlyof1970',uptonow,alotofmodelsandcalculationmethodswereproposedtocalculatethetemperaturefieldoflasertransformationhardeningprocessll--gi.Allthesemodelsareb…
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| 收稿时间： | 2000-04-25 |
| 修稿时间： | 2000-04-25 |
CALCULATION OF 3-D TRANSIENT TEMPERATURE FIELD DURING LASER TRANSFORMATION HARDENING PROCESS |
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| L. W Zhang,R.S. Wang,J. Th.M.De Hosson,Y.L. Xia and F. G. Wang The State Key Lab. for Materials Modification by Laser,Ion and Electron Beams,Dalian University of Technology,Dalian ,China .CALCULATION OF 3-D TRANSIENT TEMPERATURE FIELD DURING LASER TRANSFORMATION HARDENING PROCESS[J].Acta Metallurgica Sinica(English Letters),2000,13(2):806-810. |
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| Authors: | L W Zhang RS Wang J ThMDe Hosson YL Xia and F G Wang The State Key Lab for Materials Modification by Laser Ion and Electron Beams Dalian University of Technology Dalian China |
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| Affiliation: | L. W Zhang,R.S. Wang,J. Th.M.De Hosson,Y.L. Xia and F. G. Wang ) The State Key Lab. for Materials Modification by Laser,Ion and Electron Beams,Dalian University of Technology,Dalian,China ) Department of Applied Physics,University of Groningen,The Netherlands |
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| Abstract: | A three-dimensional transient heat transfer model for laser transformation hardening process has been developed in this paper. The finite size of the laser treated sample, the surface heat loss of the sample, the latent heat of phase transformation and the temperature dependence of thermal properties of materials were considered. The heat source was considered as a moving Gaussian heat flux with a constant velocity. Three-dimension unequally spatial grid explicit finite difference equations, alternating direction implicit finite difference equations and implicit finite difference equations were deduced respectively. Three programs to calculate the temperature field were developed using Fortran language. The transient temperature fields of C22, 42CrMo, C60 steel samples during laser transformation hardening process were calculated using these programs, and the widths and depths of laser transformation hardening zones were also predicted. C22, 42CrMo, C60 steel samples were treated by CO_2 laser,the widths and depths of laser transformation hardening zones of these samples were also measured experimentally. The calculated widths and depths of laser transformation hardening zones are in good agreement with the experimental results. |
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| Keywords: | temperature field laser transformation hardening steel |
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