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'Issues in Increasing Build Rates for Laser Deposited PM Alloy 690N_2'

机译:“增加激光沉积PM合金690N_2的制造速率的问题”

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摘要

The application of Alloy PM 690N_2, a high chrome nickel-based alloy, has had limited use due to the high costs involved in producing wrought products from powder. Laser Powder Deposition (LPD) offers a technique to take advantage of PM 690N_2 properties at reasonable cost. PM 690N_2 powder has been laser deposited at rates from 0.2 to 12 in~3/hr at laser input powers ranging from 250 to 7500 watts using both CO_2 and Nd:YAG lasers producing fully dense material. An attempt has been made to correlate the processing conditions with the resultant microstructures and properties A parametric study has been carried out with the high power CO_2 lasers with the emphases to increase the dilution in the base material and between the sequential layers in the build-up. The parameters used in this investigation were laser power, speed, powder flow rate, powder size, powder carrier gas and shaping gas, and powder size. For this study the minimum deposition rate was 180 cm~3/hr. The relative effects and attributes of using a CO_2 versus a Nd:YAG laser for LPD is reported.
机译:高铬镍基合金PM 690N_2合金的应用由于使用粉末生产锻造产品的高成本而受到限制。激光粉末沉积(LPD)提供了一种以合理的成本利用PM 690N_2特性的技术。已使用CO_2和Nd:YAG激光器产生完全致密的材料,以0.2至12 in〜3 / hr的速率以250至7500瓦的激光输入功率对PM 690N_2粉末进行了激光沉积。已尝试将加工条件与所得的微观结构和性能相关联。已对高功率CO_2激光器进行了参数研究,重点是增加基体材料中和连续层之间的稀释度。 。本研究中使用的参数为激光功率,速度,粉末流量,粉末尺寸,粉末载气和整形气体以及粉末尺寸。对于本研究,最小沉积速率为180 cm〜3 / hr。报道了使用CO_2与Nd:YAG激光进行LPD的相对效果和属性。

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