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%.
出处
《热处理技术与装备》
2016年第1期16-20,共5页
Heat Treatment Technology and Equipment
基金
国家自然科学基金青年科学基金项目(51201046)
关键词
激光表面淬火
温度场
淬硬层
45钢
数值模拟
laser surface quenching
temperature field
hardened layer
45 steel
numerical simulation
