DEVELOPMENT OF HIGH EFFICIENCY SURFACE TREATMENT OF METAL MOLD BYLARGE-AREAELECTRON BEAM IRRADIATION

大面积电子束辐照高效金属模具表面处理技术的研究

• 批准号: 17360064
• 负责人: UNO Yoshiyuki
• 金额: $ 10.51万
• 依托单位: Okayama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17360064/
• 关键词: ELECTRON BEAM; METAL MOLD; SURFACE FINISHING; SURFACE MODIFICATION; SURFACE TREATMENT; CORROSION RESISTANCE

A new finishing process for metal molds by large-area pulsed electron beam irradiation is proposed. The large-area electron beam irradiation equipment used here was recently developed for surface treatment or surface modification. Electron beam with high energy density can be irradiated without concentrating the beam. Then, large-area electron beam with a maximum diameter of 60mm can be used for melting or evaporating metal surface. Using this system, the possibility for high efficient finishing of metal molds is experimentally discussed.Main conclusions obtained are as follows;(1) Under a proper EB irradiating condition, the surface roughness of ED Med metal mold surface can be reduced from 6μmRz to 0.7μm in just a few minutes by large-area EB irradiation. Also, the glossiness can be improved very well.(2) Very thin resolidified layer is formed on metal mold. The structure of the resolidified layer differs from that of the base material, in which the grain size becomes smaller by large-area EB irradiation.(3) Surface smoothing is performed by concentrating EB onto convex parts in this method.(4) The corrosion resistance and the repellency of metal mold surface can be improved by large-area EB irradiation, simultaneously with surface smoothing, whereas the surface hardness a little decreases.(5) Even if the tilting angle of surface is close to 90 degrees, the surface roughness could be improved very well, which indicates that in the case of small simple shaped mold consisting of relatively small tilting surfaces, the smoothing of the whole surface is possible in a few minutes without moving and tilting the mold.(6) The thickness of removed material on the EB irradiated surface is very small and almost constant, which make it possible to finish the metal mold surface precisely.

提出了一种新的金属模具大面积脉冲电子束辐照光整加工工艺。这里使用的大面积电子束辐照设备是新近研制的用于表面处理或表面改性的设备。具有高能量密度的电子束可以在不使电子束集中的情况下被照射。然后，可以使用最大直径为60 mm的大面积电子束来熔化或蒸发金属表面。主要结论如下：(1)在合适的电子束辐照条件下，大面积电子束辐照可在短短几分钟内使金属模具表面粗糙度从6μmrz降低到0.7μm。金属模具表面形成了很薄的再结晶层。再结晶层的组织结构与母材不同，大面积电子束照射使颗粒尺寸变小。(3)通过将电子束集中在凸形零件上进行表面光顺。(4)大面积电子束照射可以提高金属模具表面的耐蚀性和排斥性，同时表面光顺，但表面硬度略有下降。(5)即使表面倾角接近90度，表面粗糙度也能得到很好的改善，这表明在由相对较小的倾斜面组成的简单形状的小模具的情况下，在不移动和倾斜模具的情况下，整个表面在几分钟内就可以光滑。(6)电子束照射的表面上去除的物质厚度很小，几乎是恒定的，这使得金属模具表面的精密抛光成为可能。

项目成果

High Efficiency Surface Finishing of Metal Mold by Large-area Electron Beam Irradiation (2nd Report) (in Japanese)

通过大面积电子束辐照对金属模具进行高效表面精加工（第二次报告）（日文）

• 发表时间: 2005
• 期刊: Journal of the Japan Society for Precision Engineering 71-11
• 作者: Akira;OKADA;Yoshiyuki;UNO;Keita;NISHINA;Kensuke;UEMURA;Purwadi;RAHARJO;Sadao;SANO;Yu;ZHANBO
• 通讯作者: ZHANBO

Reduction Effect of Craters Generated on EB Polished Surface of Metal Mold by Fine Particle Peening (in Japanese)

细颗粒喷丸减少金属模具 EB 抛光表面产生的凹坑的效果（日文）

• 发表时间: 2007
• 作者: Atsuo;KONDOH;Akira;OKADA;Yoshiyuki;UNO;Sadao;SANO;Yoshiaki;DAICHI;Susumu;MISHIMA
• 通讯作者: MISHIMA

Abrasive Machining Technology(Chap.4 EB Polishing)(in Japanese)

磨料加工技术（第4章EB抛光）（日语）

• 发表时间: 2006
• 作者: Yoshiyuki;UNO;Akira;OKADA
• 通讯作者: OKADA

大面積電子ビームによる金型加工面の高能率仕上げに関する研究(第2報)

利用大面积电子束对模具加工表面进行高效精加工的研究（第二次报告）

• 发表时间: 2005
• 期刊: 精密工学会誌 71
• 作者: 岡田 晃;宇野義幸;仁科圭太;植村賢介;Purwadi RAHARJO;佐野定男;虞戦波
• 通讯作者: 虞戦波

EBポリッシングによる金型の表面改質

EB抛光模具表面改性

• 发表时间: 2007
• 作者: 宇野義幸;岡田晃;佐野定男;大地慶明
• 通讯作者: 大地慶明