AISI 304/410不?袗?銲件之沖蝕磨耗行為研究

Study on Erosion Wear Behaviors of AISI 304/410 Stainless Steel Weldments

徐進秋(Ching-Chiu Hsu)

指導教授 ： 唐自標

國立臺北科技大學/工程學院/材料科學與工程研究所/碩士(2008年)

摘要

AISI 304，410不?袗?，前者由於具有良好的耐蝕性銲接性、成形性的優點，故成為使用量最為廣泛的不?袗?種；後者具有優異的高溫強度、耐磨耗性及良好的破裂韌性，使得材料廣泛用於高應力零組件。
本研究係以AISI 304、410，銲件及未銲件作為實驗材料，分別以氧化鋁顆粒進行各種角度之固體顆粒沖蝕磨耗試驗，進而探討沖蝕角度對四種材料具不同基地組織及機械性質之不?袗?製品之銲件及未銲件沖蝕磨耗之影響。
實驗結果顯示，基地為沃斯田鐵的冷軋304不?袗?母材硬度高於退火狀態的410不?袗?母材(其為肥粒鐵基地內分佈許多粗大碳化物)，所以304不?袗?母材沖蝕磨耗阻抗能力較退火狀態的410?袗?母材高，也就是304不?袗?母材沖蝕率較410不?袗?母材為低。410不?袗?銲件，銲道為沃斯田鐵及肥粒鐵組成，硬度低，但熱影響區為硬且脆的麻田散鐵，硬度高，整體耐沖蝕磨耗能力較410不?袗?母材為高，故沖蝕率410不?袗?母材較410不?袗?銲件及304母材與銲材為高。304不?袗?銲件之銲道為沃斯田鐵及肥粒鐵組成，整體硬度304不?袗?銲件與較304不?袗?母材相近，故沖蝕磨耗阻抗能力304不?袗?母材與銲件相似。四種取樣試片最大沖蝕率發生在30°的沖擊角度，而最大沖蝕深度發生於45°，除410銲件最大沖蝕深度發生於75°。試片沖蝕磨耗機制傾向於延性與脆性之混合破壞型態。

關鍵字

AISI 304 ； AISI 410 ； 銲件 ； 沖蝕磨耗

並列摘要

It is known that AISI 304 austenitic stainless steel is most commonly used due to the advantages of good corrosion resistance, weldability, and formability. In addition, AISI 410 martensitic stainless steel possesses excellent high-temperature strength, wear resistance, and fracture toughness, and it has been widely used in wall and blanket structure, pipes in nuclear power plant reactors,and turbine.
In this study, both of 304 and 410 stainless steels were separately divided into the unwelded and welded conditions , and four types of them were adopted as experimental materials to perform erosion tests with an eroding carrier of Al2O3 particles under the different incident angles. The results showed that erosion resistance of the rolled 304 is better than of annealed 410 under thr unwelded condition due to its higher hardness . After the welding, the microstructure of 304 was not changed in spite of the bead and heat affected zone (HAZ), however, microstructure of 410 consisted of austenite and ferrite mixed phases in the bead as well as martensite phase in HAZ. As a result, the welded 410 showed the best erosion resistance during all the specimens. For all specimens, the maximum erosion rate of all of them occurred at an incident angle of 30°, while the deepest penetration occurred at an incident angle of 45° except for the welded 410 (75°). In addition, erosion mechanism of all the specimens showed a mixed ductile and brittle morphology.

並列關鍵字

AISI 304 ； AISI 410 ； Weldment ； Erosion wear

參考文獻

結構研究＂， 國立中山大學材料科學研究所，1998，36 頁。

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