摘要本文介绍了电子束选区烧结工艺方面的研究进展，以及电子束选区烧结技术的工作原理与系统组成。同时本文还就电子束选区烧结技术的工艺与激光选区烧结技术做出了对比，并且对电子束选区烧结技术的良好前景做出了预测。在材料方面选用的是 304 不锈钢基板与Cr13马氏体型不锈钢粉末，实际完成的是该粉末在基板上的多次烧结成型的多层堆积。所用到的实验仪器包括了电子束焊机、金相显微镜和显微硬度仪。本课题的电子束焊机高压均设定为-60kV，灯丝电流为 430mA，聚焦的线圈电流则是 680mA，通过单道烧结得出粉末在预热后的最优参数为 5mA，1mm/s，再进行了单层与多层的烧结堆积。同时又通过对烧结过程的分析与观察，以及结合金相实验过程中的金相观察，进而研究和探讨出吹粉和起球等关键问题的影响因素。 42523
毕业论文关键词 真空 不锈钢 电子束 选区烧结
Title The research on selective sintering of electron beam.
Abstract District of the electron beam sintering technology were introduced in this paper the research progress of, and electron beam sintering technology of working principle and system composition. At the same time this paper also selection process with laser sintering technology of the electron beam sintering technology has made the contrast, and good prospect of constituency of electron beam sintering technology has made the forecast. This topic through the multiple sets of different parameters of electron beam experiment, high pressure are set to 60 kv, filament current is 430 ma, focusing coil current is 680 ma, thus to obtain the optimal parameters of the powder after preheating is 5 ma, 1 mm/s. At the same time, through the analysis of the sintering process and observation combined with metallographic test and metallographic observation, in the process of the powder and the ball is studied and discussed the influence factors of key problems, such as. This topic selection is 304 stainless steel substrates and Cr13 markov shape iron base alloy powder, actual completion is the powder in the substrate to stack multiple sintering molding.
Keywords vacuum stainless steel electron beam selective sintering
目次
1绪论.1
1.1增材制造技术的概念1
1.2激光增材制造与电子束增材制造1
1.3电子束选区烧结技术的工作原理与系统组成2
1.4电子束快速制造技术的研究现状3
1.5电子束选区烧结技术在快速制造领域的应用前景5
1.6该课题的研究5
2实验设备及材料.7
2.1实验设备7
2.1.1烧结设备7
2.1.2实验分析与检测设备8
2.2实验材料9
2.3实验方法.10
3电子束选区烧结工艺设计11
3.1电子束焊机的基本参数调节.11
3.2确定铺粉厚度的实验.12
3.3电子束束流和烧结速度的参数选择实验.12
3.4多层平面的选区烧结.14
3.4.1多层平面的选区烧结程序.14
3.4.2平铺层烧结过程.14
3.4.3平铺层烧结成型情况.14
4实验结果的分析16
4.1基板及烧结结构的微观组织特征分析.16
4.1.1304不锈钢及其熔合区显微组织：16
4.1.2Cr13马氏体型不锈钢粉末烧结层之间的显微组织18
4.2试样的显微硬度分析.19
4.3XRD物相分析.20
4.4烧结过程中的吹粉和典型缺陷分析.21
4.4.1吹粉现象.21 电子束选区烧结工艺研究:http://www.751com.cn/cailiao/lunwen_43018.html