基于瞬态导热过程预报的激光淬火层设计
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摘要
本文运用Matlab对45钢激光加热过程的瞬态温度场进行数值模拟,由此预测激光淬火硬化层深度。结果显示,在保证材料不熔化的基础上尽量提高激光加热的功率和吸收系数、降低扫描速度、适当减小光斑尺寸,能够获得较深的淬硬层。在激光加热功率1000 W,光斑边长4 mm,扫描速率为25 mm/s,吸收系数70%时,45钢淬硬层深度能达到0.14 mm。
The transient temperature field distribution of 45 steel during the process of laser heating have been simulated. The results shows that on the basis of material not to be melted,the deeper hardened layer can be obtained by improving the laser heating power and absorption coefficient,reducing the scanning speed and appropriatel spot size. Hardened depth of 45 steel reached 0. 14 mm as laser power 1000 W,facula side length 4 mm,scanning speed 25 mm / s and absorption coefficient 70%.
The transient temperature field distribution of 45 steel during the process of laser heating have been simulated. The results shows that on the basis of material not to be melted,the deeper hardened layer can be obtained by improving the laser heating power and absorption coefficient,reducing the scanning speed and appropriatel spot size. Hardened depth of 45 steel reached 0. 14 mm as laser power 1000 W,facula side length 4 mm,scanning speed 25 mm / s and absorption coefficient 70%.
引文
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[7]陶阳峰,李敏楠,张唯一,等.低碳钢激光淬火组织及搭接区软化机理分析[J].上海工程技术大学学报,2013,27(1):82-86.
[8]刘继常,罗旦,许阳辉.球墨铸铁激光相变硬化深度与宽度的数值计算[J].材料热处理学报,2013,34(12):183-187.
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[10]陈君,张群莉,姚建华.金属材料的激光吸收率研究[J].应用光学,2008,29(5):793-798.
[11]葛文祥,李相波,程旭东,等.金属陶瓷涂层制备技术及其后处理工艺探讨[J].材料开发与应用,2011,26(4):95-99.
[12]耿广刚.激光热处理用吸光涂层材料的设计与优化[D].浙江:浙江工业大学硕士学位论文,2011.
[2]邱星武,李刚,陈华,等.激光相变硬化技术发展现状及展望[J].热处理技术与装备,2009,30(1):4-7.
[3]范雪燕,石娟,吴刚.激光表面淬火瞬态温度场在ANSYS中的模拟[J].上海金属,2005,27(3):32-33.
[4]夏立芳.金属热处理工艺学[M].5版.哈尔滨:哈尔滨工业大学出版社,2012:103-104.
[5]Lei S,Ren J M,Shi C,et al.Impact Toughness and Fracture Mechanism of the Surface Laser Hardened Components of 45 Steel[J].Laser&Optoelectronics Progress,2015,52(1):168-172.
[6]蔡汉明,刘中博,张玉芳.激光淬火加工的路径研究[J].机械制造,2010,48(6):53-54.
[7]陶阳峰,李敏楠,张唯一,等.低碳钢激光淬火组织及搭接区软化机理分析[J].上海工程技术大学学报,2013,27(1):82-86.
[8]刘继常,罗旦,许阳辉.球墨铸铁激光相变硬化深度与宽度的数值计算[J].材料热处理学报,2013,34(12):183-187.
[9]范雪燕.激光表面淬火瞬态温度场的有限元模拟及硬化层深预测[D].上海:上海海事大学硕士学位论文,2004.
[10]陈君,张群莉,姚建华.金属材料的激光吸收率研究[J].应用光学,2008,29(5):793-798.
[11]葛文祥,李相波,程旭东,等.金属陶瓷涂层制备技术及其后处理工艺探讨[J].材料开发与应用,2011,26(4):95-99.
[12]耿广刚.激光热处理用吸光涂层材料的设计与优化[D].浙江:浙江工业大学硕士学位论文,2011.