臺灣博碩士論文加值系統

中文提要: 硬面銲補為近年來廣泛運用之技術，因潛弧銲具有較低的成
本，故被廣泛的使用於 輥輪再生上。本文利用田口式直交表在不失實
驗可靠度之情況下，快速擷取反應曲 面的特徵，結合AIM網路建立一
穩健的製程模型，同時配合最佳化的過程找出最佳 製程參數。實驗
中並對磨耗及腐蝕機理作一探討，其中發現在固定800g負載下，改 變
滑動速度之情況下，起初磨耗量隨滑動速度增加而減少，當滑動速度增加
至 2m/sec時有最小之磨耗量；之後磨耗量隨滑動速度增加而大量
增加，觀察其磨耗機 構得知滑動速度在2m/sec以下時主要之磨耗機構
為氧化磨耗；當滑動速度大於 2m/sec時之磨耗機構主要為研磨磨
耗。實驗並以動電位法量測極化曲線，發現420不 銹鋼在1N的除氧硫酸
溶液中具有寬廣之鈍化電位及相當小之陽極電流密度，顯示 420不
銹鋼在1N的除氧H2SO4溶液中具有相當好之耐蝕性，之後並對腐蝕試片以
SEM觀 察其顯微組織，發現420不銹鋼在1N的除氧硫酸溶液中，呈均勻
溶解。

The Tuguchi orthogonal array with the AIM network was used to
find the parameter conforming the request quality for the
reclamation of the steel mill rolls. The 420 stainless steel
was applied as filler materials by submerged arc
hardfacing. The result shows that there is a minimum wear
rate when the slide speed was 2m/sec. The primary wear mechanism
with the 2m/sec silde speed is oxidative wear. The primary
wear mechanism with the speed over 2m/sec is abrasive wear.
The polarization curves wear measured by potentiodynamic
polarization. The result shows that the welding current during
hardfacing was the major factor to improve the corrosion
resistance for 420 stainless steel in 1N H2SO4 solution.