臺灣博碩士論文加值系統

本研究目的探討SUS 304不鏽鋼鋼材，以日本OTC型號FD V6機器手臂使用氬氣保護氣體，銲接後以液壓式萬能材料試驗機進行拉伸試驗及3.5%氯化鈉(NaCl)溶液腐蝕特性的研究觀察及分析。實驗以SUS304不鏽鋼鋼材為實驗母材，以不同的電銲之電流、電壓、速率等3種變數作為銲接操作及控制的模式，形成單因子操作的3個模組，每個模組做為5種試片，共計產生15組分別不同製程參數的實驗取樣試片，以線切割設備進行鋼材試片切割，進行拉伸實驗分析之最大應力抗拉強度及銲道裁切成腐蝕實驗試片，以塔弗（Tafel）電化學方式進行腐蝕速率實驗及分析。
實驗結果顯示，經拉伸實驗、Tafel塔弗實驗以3個模組，每個模組5種試片
共15組不同製程銲接參數，實驗試片平均抗拉強度及在腐蝕電流密度與腐蝕電位特性中腐蝕速率結果，W13(銲接參數：電流170A，電壓19V，速度40cm/min)抗拉強度為625.78MPa較大；腐蝕電壓(-5.571E-1 V) 腐蝕電流(3.639E-6 A) 極化電阻(5.608E+3Ω) 較佳。

得知在銲接工作參數第13組(電流170A，電壓19V，速度40 cm/min)銲接參數有較佳之平均抗拉強度，試片破斷口均在母材上位置及有低腐蝕速率之特性，此結構在3.5%氯化鈉(NaCl)溶液中有較佳的耐腐蝕特性。
關鍵字：不鏽鋼SUS304、塔弗（Tafel）電化學、抗拉強度。

The purpose of this research is to investigate the research and observation of SUS 304 stainless steel steel with Japanese OTC model FD V6 robot arm using argon shielding gas to conduct tensile test with hydraulic universal material testing machine and the corrosion characteristics of 3.5% sodium chloride (NaCl) solution and analyze. The experiment uses SUS304 stainless steel as the experimental base material, and uses different electric welding current, voltage, speed and other 3 variables as the welding operation and control mode, forming 3 modules of single-factor operation, and each module is used as 5 types Test specimens, a total of 15 sets of experimental sampling specimens with different process parameters were produced. The steel specimens were cut with wire cutting equipment, and the maximum stress tensile strength and weld bead were cut into corrosion test specimens for tensile test analysis. Tafel electrochemical method for corrosion rate experiment and analysis.
The experimental results show that after the tensile test and the Tafel test, there are 3 modules, and each module has 5 test pieces.
A total of 15 sets of welding parameters for different processes, the average tensile strength of the experimental specimens and the corrosion rate results in the corrosion current density and corrosion potential characteristics, W13 (welding parameters: current 170A, voltage 19V, speed 40cm/min) tensile strength is 625.78 MPa is larger; corrosion voltage (-5.571E-1 V), corrosion current (3.639E-6 A), polarization resistance (5.608E+3Ω) is better.
It is known that the welding parameters in the 13th group of welding working parameters (current 170A, voltage 19V, speed 40 cm/min) have better average tensile strength, and the test piece fractures are all located on the base metal and have the characteristics of low corrosion rate. This structure has better corrosion resistance in 3.5% sodium chloride (NaCl) solution.

Keywords: Stainless steel SUS304, Tafel electrochemistry, tensile strength.

目錄
中文摘要 iii
Abstract v
致謝 vii
目錄 ix
表目錄 xii
圖目錄 xiv
符號表 xix
第一章 緒論 1
1.1研究動機 1
1.2研究背景 2
1.2.1 不鏽鋼304銲接機械強度相關文獻回顧 2
1.2.2 不鏽鋼304銲接腐蝕相關文獻回顧 4
1.3研究之目的 6
第二章 基礎之理論 7
2.1 不鏽鋼的定義 7
2.1.1不鏽鋼分類 8
2.1.2麻田散鐵不鏽鋼 8
2.1.3肥粒鐵不鏽鋼 8
2.1.4沃斯田鐵不鏽鋼 9
2.1.5不鏽鋼的耐腐蝕性 9
2.2 銲接概論及原理 11
2.2.1 銲接法的定義與分類 12
2.2.2 原理 12
2.3 銲接方法-氣護金屬電弧銲接(GMAW) 13
2.4拉伸原理 14
2.5金屬材料與腐蝕關係 16
2.6塔弗極化曲線(Tafel) 17
第三章 實驗研究架構與設備 21
3.1 實驗規劃程序 21
3.2 實驗設備 23
3.2.1 銲接材料與設備 24
3.2.2 拉伸實驗設備 26
3.3 銲接試驗 28
3.4 拉伸試驗 29
3.5 拉伸後破斷面觀察 30
3.6 Tafel電化學實驗 31
3.6.1 電化學恆電位儀設備 32
第四章 實驗結果與討論 36
4.1 SUS-304銲接機械性質探討 36
4.1.1 銲道最大抗拉強度 36
4.1.2 銲道拉伸後破斷面觀察 56
4.2 Tafel電化學實驗探討 65
4.2.1 第一組3.5%氯化鈉(NaCl)溶液下之極化曲線(W1-W5) 65
4.2.2 第二組3.5%氯化鈉(NaCl)溶液下之極化曲線(W6-W10) 72
4.2.3 第三組3.5%氯化鈉(NaCl)溶液下之極化曲線(W11-W15) 79
第五章 研究結果與未來展望 87
5.1 研究結果 87
5.2 未來之展望 89
參考文獻 90

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