为了研究激光技术焊接块体非晶合金的可行性,采用激光焊接块体非晶合金Zr45Cu48Al7。当焊接速度为8m/min、激光输出功率为1.2kW时,焊缝和热影响区均保持了非晶特性,且没有发现裂纹等的缺陷;试样的热循环温度曲线分析表明,焊缝和热影响区急速从熔点冷却到430℃以下是该试样保持非晶的原因。结果表明,采用激光焊接技术可以成功连接块体非晶合金。

In order to study the possibility of laser welding bulk metallic glass,two pieces of bulk metallic glass based on Zr45Cu48Al7 without crystallization were successfully welded laser welding.No crystallization was observed and no visible defect of crack was recognized in the bead and heated-affected zone (HAZ) under the condition of welding scanning speed of 8m/min with output laser power of 1.2kW.The temperature profile of the thermal cycle (temperature history) in the bead and HAZ indicates that the reason of non-crystallization of the sample is that the temperature in the bead and HAZ rapidly decreased to below 430℃ in glass formation from the melt.The laser welding method can be used to weld the bulk metallic glass successfully.