雷射銲接技術去除薄金屬構件中缺陷之研究

Investigation of Removing Defects in Thin Metal Components by Laser Welding Technique

楊子青(T. C. Yang) ； 吳憲政(H. C. Wu) ； 陳鈞(C. Chen)

《材料科學與工程》 36卷4期 (2004/12) Pp. 195-202

https://doi.org/10.6409/JMSE.200412.0195

摘要

本研究係應用高功率二氧化碳雷射銲接技術，進行去除薄金屬構件之缺陷探討。金屬構件缺陷之成因，主要為材料製造或成品使用過程中所產生的缺陷。實驗材料分為兩大類，包括人工預製缺陷試片與使用已知含有缺陷的不銹鋼試片。材料缺陷的去除，可經由金相組織觀察、X光檢驗與機械性質測試等評估，做為雷射銲接去除缺陷之有效性指標。實驗結果顯示，應用雷射栓孔(Keyhole)銲接方式，可大幅減少試片內夾雜物含量、消除試片內之氧化膜及完成試片裂縫或孔洞之密封。此外，試片缺陷經雷射去除後的機械性質與原材相近，故使用雷射銲接去除薄金屬構件缺陷確為可行，未來可考慮用於受損薄金屬構件之再生製程。

關鍵字

雷射銲接 ； 金屬缺陷 ； 再生處理

並列摘要

The application of laser welding technique to remove defects in thin metal components was investigated using a high power CO2 laser The defects in metals could be as a result of fabrication and/or service defects Specimens containing various defects, which were either artificially made or preexisted, were employed in this study Metallographic and x-ray inspections together with mechanical testing were used to index the effectiveness of defect removal in specimens. Experimental results indicated that the reduction of inclusions, elimination of oxide films and sealing of cracks/pores in specimens could be achieved largely by ”keyhole” laser welding. In addition, the laser-processed region could have mechanical properties comparable to the surrounding base metal. It was concluded that the removal of defects in thin metal components by lasers seemed to be very promising and should be considered for the restoration of damaged parts in the future.

並列關鍵字

Laser welding ； metal defects ； restoration