gh4169镍基合金粉末选区激光熔化基础工艺分析

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1、中北大学学位论文thelaserlightfrequencyof12Hz,thepushpowderthicknessof0.15mm.ThesurfaceoftheformingpartswithSLMisflatonthewhole.Thedensityoftheblockspecimenwiththeoptimalprocessparametersis98.45%andthemicro-hardnessoftheblockspecimenwiththeoptimalprocessparametersis427HV.Keywords:Selecti

2、veLaserMelting,Nickel-basedalloyofGH4169,defectanalysis,micro-hardness,density中北大学学位论文目录1绪论1.1选区激光熔化技术概述.............................................11.1.1选区激光熔化技术原理.......................................11.1.2选区激光熔化技术优缺点.....................................31.1.3选区激光熔化国内外研究现状..

3、...............................31.2课题来源及研究意义...............................................61.2.1课题来源...................................................61.2.2研究意义...................................................61.3研究内容及技术路线...............................................71.3.1

4、研究内容...................................................71.3.2技术路线...................................................72试验材料、设备及试验方法2.1试验材料.........................................................92.1.1基体材料...................................................92.1.2熔化材料..............

5、....................................102.2试验设备及方法..................................................112.2.1选区激光熔化设备..........................................112.2.2制取试样的相关设备........................................122.2.3性能分析与组织观察设备....................................133镍基合金粉末选区激光熔

6、化工艺试验3.1单层单道工艺试验................................................153.1.1激光电流对单层单道扫描线线宽、线高及外观形貌的影响.........163.1.2脉冲宽度对单层单道扫描线线宽、线高及外观形貌的影响.........183.1.3扫描速度对单层单道扫描线线宽、线高及外观形貌的影响.........20I中北大学学位论文3.1.4激光频率对单层单道扫描线线宽、线高及外观形貌的影响.........213.1.5铺粉厚度对单层单道扫描线线宽、线高及外观形貌的影响.........2

7、33.2单层多道工艺试验................................................253.2.1扫描间距对单层多道扫描成型质量的影响......................263.2.2激光电流对单层多道扫描成型质量的影响......................283.2.3扫描速度对单层多道扫描成型质量的影响......................293.2.4铺粉厚度对单层多道扫描成型质量的影响......................303.3多层多道工艺试验..................

8、..............................313.4本章小结........