臺灣博碩士論文加值系統

本研究選用我國中鋼公司所研製的S355ML鋼板，使用潛弧銲(SAW: Submerged arc welding)銲接方式，再利用銲接條件參數差異銲接S355ML鋼板，並分析在不同銲接條件下造成的機械性能差異，交叉比較並分析在較優異機械性能條件下所銲接之銲道，是否同時也擁有較佳的夏比V型缺口衝擊試驗(CVN) 。在此實驗進行差異分析比較的同時，固定使用潛弧銲機為林肯A-05 1000A之機型，銲接材料為SW-H12K/SF-66，銲線線徑4.0mm，母材於銲接前皆做除氫加熱到90℃動作，銲接後使用玻璃纖維材質布料覆蓋緩冷，試片取厚度40mm、長度300mm、寬度150mm兩塊鋼板組成長度300mm，寬度300mm的40板厚完整試片，開槽條件為雙V槽60度沒有間隙，根距6mm，衝擊片性能測試時溫度衝擊片皆以液態氮降溫方式採-40℃做夏比V型缺口衝擊試驗(CVN)。最佳銲接參數條件以田口法直交表實驗組合而得，四個控制因子分別為:銲接電壓550(V)、銲接電流28(A)、銲接移動速度450(mm/min)、銲線伸出長度25(mm)，其中銲接速度貢獻率佔33.3%佔比最高，其次為銲接電流貢獻率27.2%。
最後根據此銲接參數數據進行三次實驗確認，最後驗證最佳化參數所做的試片機械性能確實優於之前實驗，因此可將此銲接參數列入銲接參考依據，運用此參數可有效提升工件韌性，相信對風電產業發展會有所貢獻。

This study selects the S355ML steel plate developed by my country Steel Corporation, uses the submerged arc welding (SAW: Submerged arc welding) welding method, and then uses the welding condition parameter difference to weld the S355ML steel plate, and analyzes the difference in mechanical properties caused by different welding conditions, cross-compared and analyzed Does the weld bead welded under the condition of better mechanical properties also have better Charpy V-notch impact test (CVN). While performing the difference analysis and comparison in this experiment, the fixed use of the submerged arc welding machine is Lincoln A-05 1000A model, the welding material is SW-H12K/SF-66, the wire diameter is 4.0mm, and the base material is all before welding. Perform the action of heating to 90℃ for hydrogen removal. After welding, use glass fiber cloth to cover and slowly cool. The test piece is composed of two steel plates with a thickness of 40mm, a length of 300mm and a width of 150mm to form a complete test piece with a length of 300mm and a width of 300mm. The condition is that there is no gap between the double V grooves at 60 degrees and the root distance is 6mm. During the performance test of the impact piece, the temperature impact piece is cooled by liquid nitrogen at -40℃ for Charpy V-notch impact test (CVN). The best welding parameter conditions are obtained by the combination of Taguchi method orthogonal table experiment. The four control factors are: welding voltage 550 (V), welding current 28 (A), welding movement speed 450 (mm/min), and welding wire extension The length is 25 (mm), of which the welding speed contribution rate accounts for 33.3%, which accounts for the highest proportion, followed by the welding current contribution rate of 27.2%.
Finally, three experiments were performed to confirm the welding parameter data. Finally, it was verified that the mechanical properties of the test piece made by the optimized parameters were indeed better than the previous experiments. Therefore, this welding parameter can be included in the welding reference basis, and the use of this parameter can effectively improve the toughness of the workpiece , I believe it will contribute to the development of the wind power industry.

第一章 緒論
第二章 基礎理論
第三章 研究方法與實驗設計
第四章 田口法實驗與分析
第五章 結論與展望

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