硅酸铝短纤维强化铝基复合材料的激光切割

研究探讨了硅酸铝强化铝基复合材料的激光切割工艺对切口宽度及热影响区的影响.研究发现,2000WCO2激光在1～8m/min速度下切割厚度1～4.2mm复合材料时,可以得到全切透、宽度小的切口和较小的热影响区.由于激光切割时的热作用,热影响区显微组织不同于复合材料本体,硅酸铝细微发生了部分熔化,在随后冷却中出现了富硅析出相.

Lasercutting of Al-silicate fibre reinforced ZL109 matrix composition

This paper deals with the laser cutting parameters for Al-silica te short fibre reinforced aluminum matrix composite and the heat-affecting zone(HAZ) of laser interaction.The results show that under the condition of 2kW CO₂ laser and cutting velocity of 1～8m/min,penetrated and narrow cutting kerf and small HAZ had been gotten on composite samples whose thickness is from 1 to 4.2mm. Because of the effect of heat conduction,the microstructure of HAZ of laser cutting samples is different from that of the original composite and subsequently precipitated a silicon rich phase by the melted Al-silicate fibres.