- 期刊
沃斯回火熱處理對球墨鑄鐵沖蝕磨耗之影響
Effect of Austempering Heat Treatment on Erosive Wear of Ductile Iron
摘要
本研究係以球墨鑄鐵進行沃斯回火熱處理，獲得不同基地組織的試片，再利用沖蝕磨耗實驗來進行各種角度的沖蝕磨耗，配合機械性質測試及掃描式電子顯微鏡(SEM)來觀察沖蝕表面，探討沃斯回火熱處理對球墨鑄鐵不同沖蝕磨耗型態與衝擊角度的影響。 實驗結果顯示，材料經熱處理後，硬度均會增加，ADI的衝擊韌性值也明顯提高。經過沖蝕磨耗試驗後之ADI，抵抗沖蝕的能力提高。經由SEM觀察在石墨處產生了凹穴，由於石墨的抵抗沖蝕磨耗性較差，在這些凹穴四周圍由於基地組織與石墨組織的快速變形，加速材料的剝落。然基地組織硬度的提升，有助石墨組織抵抗沖蝕磨耗能力，減小石墨組織脫落、塌陷的情況。
並列摘要
This research applied austempering heat treatment to obtain various microstructures in the matrix of ductile iron and studied their erosion wear behavior. The effects of different impact angle and microstructure on erosion wear rate and morphology wase investigated. Mechanical property evaluation together with SEM analysis was also carried out to correlate the wear behavior observed. The results showed that after austempering hardness increased substantially. Impact toughness of ductile iron increased. SEM observation revealed that cavities formed at where the spheroidal graphites located. Due to poor impact wear resistance of the graphite, they fell off from the matrix in early stage of the shotlasting leaving a hole behind that acclerated the peeling off effect of the ductile iron. Higher hardness enhanced erosion wear resistance from the ability of sustaining deformation and peeling off effects
延伸閱讀
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- 黃立仁、黃士銘（2021）。沃斯回火球墨鑄鐵深冷處理特性之研究。鑄造工程學刊，47(3)，27-34。https://www.airitilibrary.com/Article/Detail?DocID=10116761-202109-202109290022-202109290022-27-34
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