ADI在氯化鈉溶液之腐蝕磨耗行為研究

A Study on Corrosive Wear Behavior of ADI in NaCl Solution

孫浩筠(H. Y. Sun) ； 許正勳(C. H. Hsu)

《鑄造工程學刊》 44卷1期 (2018/03) Pp. 1-8

摘要

本研究將延性鑄鐵(DI)經沃斯回火處理，產生沃斯回火延性鑄鐵(ADI)，然後分別在有無3.5wt% NaCl溶液狀態下之磨耗試驗，以比較DI及ADI抗腐蝕磨耗之能耐。金相試驗、X光繞射分析及硬度試驗結果可顯示顯微組織和硬度對腐蝕磨耗的影響；另採用浸泡試驗(3.5wt% NaCl)以對照比較DI和ADI單純的腐蝕行為。實驗結果顯示，ADI由於具有較高的硬度及含有具耐蝕性的殘留沃斯田體相，故其耐腐蝕磨耗性較DI為佳。

關鍵字

延性鑄鐵 ； 沃斯回火 ； 殘留沃斯田體 ； 腐蝕磨耗

並列摘要

In this study, ductile cast iron (DI) was austemper-treated to produce austempered ductile iron (ADI). The wear tests were carried out in 3.5 wt% NaCl and without 3.5 wt% NaCl solution to compare the wear/corrosion resistance of both DI and ADI. Metallographic tests, X-ray diffraction analysis, and hardness tests were also conducted to understand the effects of microstructure and hardness on corrosion wear behavior of the irons. The immersion test in 3.5 wt% NaCl was also carried out for a comparison between corrosion behavior of DI and ADI. The experimental results showed that the corrosive wear resistance of ADI is better than that of DI because of its high hardness and retained austenite.

並列關鍵字

Ductile iron ； Austempering ； Retained austenite ； Corrosive wear