AlSi7Mg合金选区激光熔化工艺及性能研究

为了研究Al Si7Mg合金选区激光熔化成形工艺及性能,通过改变激光功率和扫描速度,得到不同工艺参数对成形试样性能的影响规律。结果表明:试样的相对密度随激光功率和扫描速度的增大均呈先上升后下降的趋势,试样的相对密度最高可达99.95%;随激光功率的增加,试样的拉伸性能先上升后下降;激光功率为350 W、扫描速度1 400 mm/s时,试样抗拉强度为423 MPa,屈服强度为293 MPa。

Process and Properties of AlSi7Mg Alloy Fabricated by Laser Selected Melting

By changing the laser power and scanning speed,the melting process and properties of AlSi7Mg alloy selective laser were studied.The influence law of different process parameters on the properties of formed samples was obtained.The results show that the relative density of the samples increases first and then decreases with the increase of laser power and scanning speed,and the relative density of the samples is up to 99.95%.With the increase of laser power,the tensile property of the sample increases first and then decreases.When the laser power is 350 W and the scanning speed is 1400 mm/s,the tensile strength and the yield strength of the sample is 423 MPa and 293 MPa,respectively.