摘要
以316L不锈钢暖通管作为基材,采用激光表面处理以及粉末包埋渗铝方式对316L表面实施增强处理,并通过试验测试手段,研究功率密度对316L表面激光冲击渗铝组织和温拉伸性能的影响。研究结果表明:激光冲击强化后渗铝层表现出更多的凹坑;随着功率密度增大,粗糙度和硬度均表现出增大变化;硬度随着深度增大发生了降低;采用激光冲击强化方法对试样处理后,试样表现出更优的力学性能;随着激光功率密度的增大,力学性能获得了更明显提升;功率密度6 GW/cm2时获得了更高的力学性能,拉伸强度和屈服强度分别为531 MPa和443 MPa;激光冲击后在断裂部位观察到许多尺寸差异较大的等轴韧窝并产生撕裂棱,生成大量韧窝;增大激光功率密度后,各个韧窝的尺寸差异变得更明显,孔洞尺寸出现了增大。
316 L stainless steel HVAC pipe was used as the base material. Laser surface treatment and powder embedding and aluminizing were used to enhance the surface treatment of 316 L. The influence of power density on laser impingement aluminizing structure and thermal tensile properties of the 316 L surface were studied through experimental testing methods. The results show that there are more pits in the aluminized layer after laser shock. With the increase of power density, the roughness increases. With the increasing of power density, the diffraction peak becomes stronger. As the depth increased, the hardness continued to decrease. With the increasing of laser power density, the hardness increases. The mechanical properties of samples treated by laser shock intensification are better. With the increasing of laser power density, the mechanical properties are improved more obviously. Higher mechanical properties were obtained when the power density was 6 GW/cm~2, and the tensile strength and yield strength are 531 MPa and 443 MPa, respectively. After laser impact, many equiaxial dimples with different sizes were observed at the fracture site, and tear edges were generated, generating a large number of dimples. After increasing the laser power density, the size difference of each dimple becomes more obvious, and the hole size also increases.
作者
王松
谢红杰
宋文博
伍丽莎
Wang Song;Xie Hongjie;Song Wenbo;Wu Lisha(Department of Equipment Engineering,Henan Institute of Architectural Technology,Zhengzhou,Henan 450064,China;School of Science,Southwest Petroleum University,Chengdu,Sichuan 610500,China)
出处
《应用激光》
CSCD
北大核心
2022年第11期78-83,共6页
Applied Laser
基金
四川省教育厅科研项目(16ZB0077)。
关键词
激光冲击强化
316L不锈钢
渗铝
显微组织
温拉伸
laser impact enhancement
316L stainless steel
aluminized
microstructure
temperature tensile
