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| 1 | CALCULATION OF 3-D TRANSIENT TEMPERATURE FIELD DURING LASER TRANSFORMATION HARDENING PROCESS显示文摘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 CO2 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. | 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 | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，2： | 4 |
| 2 | Guidelines and Resources for Conducting an Environmental Crime Investigation in the United States显示文摘 | Jennifer A Suggs Earl W Beam Dorothy E Biggs | 2002 | Environmental Forensics2002，，3： | 1 |
| 3 | Nature and origin of A-type granites with particular reference to southeastern Australia 显示文摘 | COLLINS W J BEAMS S D WHITE A J R | 1982 | Contr Miner Petrol1982，8，： | 1 |
| 4 | Nature and Origin of A-type Granites with particular Reference to Southeastern Australia显示文摘 | Collins W J Beams S D White A J R Chappell B W | 1982 | Contrib Mineral Petrol1982，80，： | 1 |
| 5 | Plasma and milk urea nitrogen in relation to pregnancy rate in lactating dairy herds显示文摘 | BUTLER W R CALAMAN J BEAM S W | 1996 | Journal of Dairy Science1996，74，： | 1 |
| 6 | Growth, development,and gene expression by in vivo- and in vitro- produced day 7 and 16 bovine embryos显示文摘 | Bertolini M Beam S W Cilbelli J B | 2005 | Mol Reprod2005，，63： | 1 |
| 7 | Nature nnd origin of A-type grnnite with pmticulm reference to southeast Australia显示文摘 | Collins W J Beams S D White A J R Chappell B W | 1982 | Contrib Mineral Petrol1982，80，2： | 1 |
| 8 | Origin of an A-type granite: Experimental eonstraints显示文摘 | Clemens W J Beams S D White A J R | 1986 | American Mineralogist1986，71，： | 1 |
| 9 | Weed control options in spring-seeded tall fescue(Festuca arundinacea)显示文摘 | Willis J B Beam J B Barker W L | 2006 | Weed Technology2006，20，4： | 1 |
| 10 | Energy balance and ovarian follicle development prior to the first ovulation postpartum in dairy cows receiving three levels of dietary fat显示文摘 | Beam S W Butler W R | 1997 | Biol Reprod1997，56，： | 1 |
| 11 | Plasma and milk urea nitrogen in relation to pregnancy rate in lactating dairy cattle显示文摘 | Butler W R Calaman J J Beam S W | 1996 | J Anim Sci1996，74，： | 1 |
| 12 | Plasma and milk urea nitrogen in relation to pregnancy rate in lactating dairy herds显示文摘 | Bulter W R J Calaman and S W Beam | 1996 | J Dairy Sci1996，74，： | 1 |
| 13 | Energy balance,metabolic hormones,and early postpartum follicular development in dairy cows fed prilled lipid显示文摘 | Beam S W Butler W R | 1998 | J Dairy Sci1998，81，： | 1 |
| 14 | Nature and origin of A-type granites with particular reference to southeastern Australia显示文摘 | Collins W J Beams S D White A J R | 1982 | Contributions to Mineralogy and Petrology1982，80，： | 1 |
| 15 | Effects of energy balance on follicular development and first ovulation in postpartum dairy cows显示文摘 | Beam S W Butler W R | 1999 | J Reprod Fertil1999，54，0： | 1 |
| 16 | Nature and Origin of A-Type Granites with Particular Reference to Southeastern Australia显示文摘 | Collins W J Beams S D White A J R | 1982 | Contributions to Mineralogy and Petrology1982，80，： | 1 |
| 17 | Model checking large software specifications 显示文摘 | Anderson R J Beame P | 1998 | IEEE Transactions on Software Engineering1998，24，7： | 1 |
| 18 | Nature and origin of A-type granites with particular reference to southeastern Australia 显示文摘 | Collins W J Beams S D White A J R Chappell B W | 1982 | Contrib Mineral Petrol1982，80，2： | 1 |
| 19 | Nature and origin of A-type granites with particular reference to southeastern Austtalia显示文摘 | Collins W J Beams S D White A J R | 1982 | Contributions to Mineralogy and Petrology1982，80，2： | 1 |
| 20 | Nature nnd origin of A-type grnnites with particulm reference to southeastern Australia 显示文摘 | Collins W J Beams S D White A J R Chappell B W | 1982 | Contrib Mineral Petrol1982，80，2： | 1 |
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