Synergy Effect of Abrasive Blasting and Large-area EB Irradiation on Surface Finishing of AMed Titanium Alloy
Synergy Effect of Abrasive Blasting and Large-area EB Irradiation on Surface Finishing of AMed Titanium Alloy
复制标题
喷砂与大面积 EB 辐照对 AMed 钛合金表面光洁度的协同作用
DOI：
10.1016/j.procir.2022.09.109
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
OKADA Akira
中科院分区：
文献类型：
--
作者：
KOBAYASHI Hiroya;SHINONAGA Togo;TSUJI Toshiya;OKADA Akira
在众多的AM技术中，电子束熔炼(EBM)被广泛应用于生产钛合金零件的AM工艺中。一般而言，AMED金属产品的表面非常粗糙，超过200微米，这是因为通过扫描电子束在其表面排列了相对较大的珠子。此外，表面还会产生飞溅和空洞等表面不规则性。表面粗糙和表面不规则性会导致表面强度降低，外观不佳。因此，需要采用表面后加工工艺来使金属制品的表面光滑。常用的表面抛光工艺之一是喷砂。喷砂可以降低较大的表面粗糙度，并在表面引入残余压应力。然而，降低表面粗糙度是有限制的。另一方面，在最近发展起来的大面积电子束(大面积电子束，LEB)辐照方法中，模具钢的表面可以在几分钟内熔化完成。然而，由于初始表面粗糙度较大，表面不容易光滑，表面会产生拉伸残余应力，本文提出了喷砂与大面积电子束辐照相结合的方法对Amed钛合金进行表面光整处理。首先对AMED钛合金表面进行喷砂处理，在一定程度上减小了初始较大的表面粗糙度，改变了表面形貌。然后，将大面积的EB照射到爆炸表面。结果表明，对于平均宽度较小的爆破表面，用大面积电子束照射后，表面粗糙度显著降低。此外，通过喷砂可以降低大面积电子束辐照产生的拉伸残余应力。因此，喷砂与大面积电子束辐照相结合是有效降低AMED钛合金表面粗糙度的有效方法。
Among a broad spectrum of AM technologies, electron beam melting (EBM) is widely applied in AM process for producing titanium alloy parts. In general, AMed metal products have very rough surface of more than 200µmRz, since relatively large beads are arranged on their surface by scanning electron beam. Moreover, surface irregularities such as spatter and cavity are also generated on the surface. Rough surface and surface irregularities would lead to reduction in surface strength and poor appearance. Therefore, post surface finishing processes are required to smooth the surface of AMed metal products. One of the common surface smoothing processes is abrasive blasting. Large surface roughness can be decreased by abrasive blasting, and compressive residual stress can be introduced to the surface. However, there is a limitation to reduction of surface roughness. On the other hand, in large-area electron beam (large-area EB, LEB) irradiation method developed recently, mold steel surface can be finished by melting it in a few minutes. However, it is not easy to smooth surface with large initial surface roughness, and a tensile residual stress may be generated on the surface.In this paper, surface smoothing of AMed titanium alloy by combination of abrasive blasting and large-area EB irradiation was proposed. At first, the AMed titanium alloy surface was blasted to reduce the initial large surface roughness to some extent and change the surface topography. Then, large-area EB was irradiated to the blasted surface. It is made clear that surface roughness significantly decreases when large-area EB is irradiated to the blasted surface with small mean width. Moreover, tensile residual stress generated in large-area EB irradiation can be reduced by abrasive blasting. Therefore, combination of abrasive blasting and large-area EB irradiation is effective for efficient reduction of large surface roughness of AMed titanium alloy.
激光金属增材制造的最新趋势
DOI：
10.2493/jjspe.82.619
发表时间：
2016
期刊：
影响因子：
--
作者：
H. Kyogoku
通讯作者：
H. Kyogoku
大面积电子束辐照增材制造金属制品的表面平滑和修复
DOI：
10.1016/j.cirp.2021.04.063
发表时间：
2021
期刊：
CIRP Annals
影响因子：
--
作者：
T. Shinonaga;A. Yamaguchi;Y. Okamoto;A. Okada
通讯作者：
A. Okada
大面积电子束辐照金属模具高效精加工工艺
DOI：
--
发表时间：
2005
期刊：
Precision Engineering 29・4
影响因子：
--
作者：
Yoshiyuki UNO;Akira OKADA;Kensuke UEMURA;Purwadi RAHARJO;Toshihiko FURUKAWA;Kosaku KARATO
通讯作者：
Kosaku KARATO