摘要针对真空电子束选区烧结快速成型技术，研究不锈钢金属粉末的电子束烧结工艺，采用电子束作为热源在真空条件下对不锈钢粉末进行选区烧结，实现不锈钢粉末与基体、多层粉末间的冶金结合。分析圆扫描方式和多种束流参数下的接头微观组织、成分、力学性能，提出较优的烧结工艺参数。本题通过对多组参数的电子束进行试验，高压均设定为60Kv，灯丝电流400mA，聚焦的线圈电流726mA，从而得出粉末在预热后的最优参数为18mA，5mm/s.同时通过对烧结过程的观测和分析，以及结合金相实验过程中金相观察，研究和探讨吹粉和起球等问题的影响因素。本题选用的是304不锈钢基板与314铁基合金粉末，实际过程中完成的是正方形结构的程序设计及选区烧结。33710
关键词  不锈钢 真空  电子束  选区烧结
毕业论文设计说明书外文摘要
Title   The study on selective sintering of stainless steel vacuum electron beam  
Abstract
According to the rapid prototyping technology of vacuum electron beam selective sintering, studying the process of stainless steel metal powder electron beam sintering,and use the rapid deflection of electron beam as the heat source in vacuum condition of stainless steel powder for sintering, make stainless steel powder and the matrix, and multiple layers of a powder metallurgical bond .The microstructure, composition and mechanical properties of the joints under the circular scanning mode and the different beam parameters were analyzed, and the optimized parameters of the sintering process were proposed.. The result of multiple sets of parameters of electron beam test , high pressure are set 60 kV and filament current is 400mA, focusing coil current is 726mA. Thus obtained powder in the preheating of the optimal parameters is 18ma. 5mm/s.Also through the observation and analysis of the sintering process, and combined with metallographic experiment in the process of metallographic observation, research and explore blowing powder and pilling problem of influencing factors. The subject use 304 stainless steel substrate and 314 Fe based alloy powder, the actual process completed is square structure program design and selective sintering.
Keywords   stainless steel   vacuum     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 目前的3D打印技术    3
1.4 电子束选区烧结技术的发展趋势    5
1.5电子束选区烧结研究    6
2 实验设备及材料    8
2.1实验设备    8
2.1.1烧结设备    8
2.1.2 试验测试与分析设备    9
2.2实验材料    11
2.3试验方法    12
3 前期工艺试验    13
3.1 电子束焊机基本参数调节    13
3.2铺粉厚度的选择试验    14
3.3粉末预热试验    15
3.4 电子束束流和烧结速度的参数选择试验    15
3.5本章小结    17
4  314型不锈钢粉末粉末选区烧结    17
4.1多层平面的选区烧结    18
4.1.1多层平面的选区烧结程序    18
4.1.2平铺层烧结过程    18
4.1.3平铺层烧结成型情况    19
4.2正方形的选区烧结    20
4.2.1正方形选区烧结程序    20
4.2.2 正方形烧结过程    20
4.2.3正方形烧结成型情况    21 不锈钢真空电子束选区烧结工艺研究:http://www.751com.cn/cailiao/lunwen_30956.html