Laser welding was utilized to weld Bulk Metallic Class Zr53.7Ni9.4Cu28.5Al8.4.The microstructure of joint under different processing parameters during laser welding was researched and the crystallization behavior of the bead and Heat-affected Zone (HAZ) during the thermal cycle of welding was primarily discussed.The results showed that an excellent joint has been obtained and there was no visible defect,pore or crack in both the bead and HAZ when the output power of laser-beam was 1 200 W and the welding speed was increased from 8 m/min to 30 m/min.No crystal was observed in weld melting zone with keeping the amorphous structure,while there was distributing discontinuous arc-shaped punctuates crystal in HAZ.In HAZ,the grain size decreased when the welding speed increasing.%采用激光焊接技术对Zr53.7Ni9.4Cu28.5Al8.4块体金属玻璃进行焊接试验,研究在激光焊接下不同工艺参量对焊接接头组织的影响,探讨了焊接热循环过程中焊缝和热影响区的晶化行为.结果表明,固定激光功率1200W,焊接速度从8m/min提高到30 m/min,均成功获得了无气孔和裂纹等缺陷的焊接接头.焊缝熔化区保持了非晶结构,热影响区则出现不连续的呈弧形分布的点状晶粒.随着焊接速度的提高,热影响区的晶粒尺寸逐渐减小.
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