摘要
分别以TiO2、Cr2O3、B2O3、SiO2、CaF2为试验用活性剂,研究了它们对不锈钢1Cr18Ni9Ti低功率脉冲激光焊接的影响。结果表明,这些活性剂都能不同程度地增加焊缝熔深,其中B2O3和Cr2O3分别使熔深增加46%和31.7%,同时这两种活性剂还可以改善焊缝表面成形。在活性剂作用下,焊缝显微组织仍由柱状晶和等轴晶组成,但是这两种晶粒的区域会发生变化。活性剂增加焊缝熔深的机理不止一种,但都归结于增加了工件对激光的吸收率。
Five kinds of activating fluxes （TiO2, Cr2O3, B2O3, SiO2, CaF2） were used to study their effects on low-power pulse laser welding of stainless steel. The results show that all activating fluxes can deepen the penetration, thereinto, B2O3 and Cr2O3 can deepen the penetration by 46% and 31.7%, respectively, and also improve the surface formation. The activating fluxes increase the absorption ratio of laser power. Under the activating fluxes, the microstructure still consists of equiaxed crystals and columnar crystals, however, the areas of the crystals change.
出处
《热加工工艺》
CSCD
北大核心
2008年第23期78-80,共3页
Hot Working Technology
基金
国家自然科学基金资助项目(50675179)
关键词
低功率脉冲激光活性焊
不锈钢
熔深
low power pulse laser welding with activating fluxes
stainless steel
welding penetration
