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題 名 | 片狀石墨耐熱鑄鐵基地組織對於高溫氧化行為的影響=The Effect of Matrix Structure on the High Temperature Oxidation Behavior of Flaky Graphite Heat Resistant Cast Irons |
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作 者 | 楊榮顯; 蕭錫謙; 陳彥志; | 書刊名 | 鑄工 |
卷 期 | 25:2=101 1999.06[民88.06] |
頁 次 | 頁8-16 |
分類號 | 472.2 |
關鍵詞 | 片狀石墨耐熱鑄鐵; 基地組織; 高溫氧化現象; Heat resistant flaky graphite cast iron; Matrix structure; High temperature oxidation behavior; |
語 文 | 中文(Chinese) |
中文摘要 | 耐熱鑄鐵在工業上深具實用價值且廣泛應用, 本研究主要探討片狀石墨耐熱鑄鐵 之高溫氧化現象;在固定的試片尺寸下(ψ 20mm × 30mm ),針對不同基地組織(肥粒鐵 、波來鐵、沃斯田鐵)及不同的添加合金( Cr,Ni,Si 等),探討其在不同溫度( 1073K、 873K、673K )時之氧化速度( Oxidation rate ), 並利用金相顯微鏡觀察氧化所造成的 組織變化及氧化層深度。 實驗結果顯示: 1.1073K、873K、673K 之耐氧化性順序為: 添加 20 % Ni-2 % Cr 之試片>添加 0.5 % Cr 之試片>無添加合金之試片。 2.873K 及 673K 時基地組織之耐氧化性為肥粒鐵基地優於波來鐵基地;但 1073K 時,則為 波來鐵基地優於肥粒鐵基地。 3. 氧化後之試片重量增加與時間之關係經迴歸分析結果得: 在 1073K 時, 添加 20 % Ni-2 % Cr 之試片為對數曲線關係; 而其餘試片( 1073K、873K )皆呈拋物線關係。 |
英文摘要 | Heat Resistant Cast lrons have been used extensively and have substantial practical value in the industry. The objective of this study is to investigate the high temperature oxidation phenomenom of the flaky graphite heat resistant cast irons. The effects of matrix structure (Ferrite, Pearlite and Austenite) and various alloy additions (Cr,Ni,Si) on the oxidation rate at different temperatures (1073K, 873K and 673K) of flaky graphite cast irons have been evaluated in this study by using the specimen size of ψ 20mm × 30mm. Also, the microstructural changes caused by the high temperature oxidation, together with the depth of oxidation layers were obsrved microscopically. The results of this study indicate that: 1. The ability to resist oxidation at 1073K, 873K and 673K is in the following order: 20% Ni-2%Cr>0.05%Cr>none alloy additions. 2. The oxidation resistance of cast iron with a is ferritic matrix is better than that with a pearlitic matrix at 873K and 673K, but is reverse at 1073K. 3. The relationships between the weight increment and the exposure time at temperature are: the 20% Ni-2%Cr alloy exhibits a Logarithm correlation at 1073K, but the other two alloys have parabolic correlation at 1073K and 873k. |
本系統中英文摘要資訊取自各篇刊載內容。