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《Laser & Infrared》 2007-01
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Low Power Nd∶YAG Laser Welding of 18-8 Type Austenitic Stainless Steel

GENG Ping,YANG Yu-ling,ZHANG Duo(College of science,Northeastern University,Shenyang,110004,China)  
The welding technology of low power YAG laser welding for 18-8 type austenitic stainless steel with the thickness of 1.0mm and the effect of laser parameters on the laser welding and the weld beam were studied.The main factors of influencing the welding beam shape including laser power density,welding speed,pulse frequency and pulse width were analyzed in detail.Besides these,the results of polishment before welding and the selection of shielding gas to the weld beam were studied.The results show that the rational combination of welding parameters such as the laser power density,the welding speed,the pulse frequency and pulse width influence the quality of the weld beam.The optimum values of these parameters to gain an excellent beam were confirmed to be: when the laser power density is 5.7× 10~5W/cm~2,the welding speed is no more than 2mm/s,the pulse frequency is 9Hz and the pulse width is 3.0ms.
【Fund】: 辽宁省博士启动基金(20051012);; 辽宁省自然科学基金(20052020)资助
【CateGory Index】: TG456.7
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