激光技术2012，Vol.36Issue(1)：103-106,4.DOI:10.3969/j.issn.1001-3806.2012.01.026
激光熔覆Co基合金温度场的数值模拟
Numerical simulation of temperature field of laser cladding Co-based alloy coatings
丁林 1李明喜2
作者信息
- 1. 安徽国防科技职业学院机械工程系,六安237011
- 2. 安徽工业大学材料科学与工程学院,马鞍山243002
- 折叠
摘要
Abstract
In order to analyze temperature field of laser cladding Co-based alloys, a 3-D physical model of laser cladding Co-based alloys was built for low carbon steel substrate preset Co-powder by means of finite element method. Taking into account of the effect of temperature on the thermo-physical parameters, the surface convective heat transfer, and the radiant heat transfer, the temperature in the laser cladding process was analyzed with SYSWELD software and verified in experiments. A 5kW CO2 laser was used to prepare Co-based alloy coatings on low carbon steel substrate. Dilution rate of the coating were examined. The results showed that temperature field changed from non-steady-state to steady-state in the laser cladding process. Denser isothermal surface and thinner isothermal surface were found near the laser spot and away from the laser spot. With the other parameters keeping the same, favorable metallurgy bonding was obtained with 8. 26% dilution at scanning velocity of 5mm/s. Right power with 1. 6kW and 1. 87kW was found at scanning velocity of 3mm/s and 4mm/s by means of SYSWELD software. These results provide reference and guidance for parametric optimization and dilution rate control in laser cladding.关键词
激光技术/有限元法/Co合金/温度场/SYSWELD软件Key words
laser technique/ finite element method/ Co-based alloys/ temperature field/ SYSWELD software分类
矿业与冶金引用本文复制引用
丁林,李明喜..激光熔覆Co基合金温度场的数值模拟[J].激光技术,2012,36(1):103-106,4.
