研究生: |
呂佳泓 Chia-Hung Lu |
---|---|
論文名稱: |
使用雷射對316L不鏽鋼送線直接能量沉積的可行性研究 Feasibility Study of Wire-feed Directed Energy Deposition of 316L Stainless Steel Using Laser |
指導教授: |
李維楨
Wei-Chen Lee |
口試委員: |
修芳仲
Fang-Jung Shiou 鍾俊輝 Chun-Hui Chung |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 機械工程系 Department of Mechanical Engineering |
論文出版年: | 2020 |
畢業學年度: | 108 |
語文別: | 中文 |
論文頁數: | 73 |
中文關鍵詞: | 316L不鏽鋼線材 、金屬積層製造 、直接能量沉積 、單位長度能量 |
外文關鍵詞: | 316L stainless steel wire, Metal material additive manufacturing, Directed Energy Deposition, Energy per unit length |
相關次數: | 點閱:353 下載:0 |
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隨著積層製造技術的成熟,開始從以前的高分子材料往金屬材料延伸,對航太業、造船業以及汽車業等產業都有發展性,因此也吸引許多廠商開發新的金屬積層製造機,並研發出多種製程技術,而金屬的積層製造又以線材及粉末兩種材料形式較多。本實驗主要探討以直徑0.8 mm的316L不鏽鋼線材在S45C板材的沉積情形,實驗採用直接能量沉積(Directed Energy Deposition, DED)的技術,藉由兩道雷射光產生的熔池將線材送入熔化。在單層沉積的實驗,固定參數包括送線速度320 mm/min、惰性氣體壓力4 kg/cm2,而實驗變化參數分別為雷射功率200、250、300、350、400、450、487 Watt及床台進給率175、200、225、250、275、300、325 mm/min。實驗結果顯示以雷射功率較高的400及450 Watt搭配床台進給率300 mm/min會有較佳的沉積結果。在固定送線速度的情況下,不同單位長度的能量與體積會互相影響,當床台進給率快而單位長度能量高的區域會有較好的成線結果;高能量但低進給率則容易造成結球;而低能量不論床台進給率為快或慢都不容易沉積在板材上。
With the evolution of additive manufacturing technology, the process has extended from polymer based to metal material additive manufacturing which has been applied in aerospace, ship building and automobile industry. Therefore, this has attracted many companies to develop metal additive manufacturing machines. A variety of process technology has been developed. Generally, additive manufacturing of metal is in the form of wire and powder. This experiment mainly focuses on the deposition of 316L stainless steel wire with a diameter of 0.8 mm on S45C plate. Directed Energy Deposition (DED) technology was used to feed the wire into the molten pool by two laser beams. In the single-layer deposition experiment, the fixed parameters include the wire feed speed of 320 mm/min and inert gas pressure of 4 kg/ cm2. The variable parameters are laser power of 200, 250, 300, 350, 400, 450, 487 Watt and feed rate of 175, 200, 225, 250, 275, 300, 325 mm/min. The results show that with high laser power of 400, 450 Watt and feed rate of 300 mm/min, better deposition is achieved. Different energies and volumes will affect each other. At the fixed wire feed speed, when the feed rate is fast and the energy per unit length is high, there will be better deposition. High energy but low feed rate will easily yield dripping; Low energy is not easy for material to adhere to the substrate whether the feed rate is fast or slow.
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