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題 名 | 耐熱鑄鐵之高溫強度與耐熱震性質及評估之研究=Study on the Evalution and Property of the High Temperature Strength and Thermal Shock Resistance of Heat Resistant Cast Iron |
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作 者 | 楊榮顯; 蕭錫謙; 余志堅; | 書刊名 | 鑄工 |
卷 期 | 27:4=111 2001.12[民90.12] |
頁 次 | 頁9-24 |
分類號 | 472.2 |
關鍵詞 | 耐熱鑄鐵; 高溫強度; 耐熱震性; 品質指標; Heat resistant cast iron; High temperature strength; Thermal shock resistance; Quality index; |
語 文 | 中文(Chinese) |
中文摘要 | 耐熱鑄鐵是使用於高溫的環境中,因此需具備優良的高溫性質,例如高溫抗拉強度、 高溫疲勞強度以及耐熱震性。 本研究主要是探討石墨型態、 其地組織與合金元素(Ni,Cr )之添加對於耐熱鑄鐵在不同試驗溫度時之高溫強度與耐熱震性質的影響及其評估。研究結果得知, 耐熱鑄鐵之高溫抗拉強度整體而言: 添加合金之優劣順序在常溫、673K、873K 時為 0.5 % Cr>20 % Ni-2 % Cr> 無添加合金試片;在 1073K 時則為 20 % Ni-2% Cr>0.5 % Cr> 無添加合金試片。 基地組織之高溫抗拉強度優劣順序在常溫、 673K、873K 時為波來鐵>沃斯田鐵>肥粒鐵;在 1073K 時則為沃斯田鐵>波來鐵>肥粒鐵。而石墨型態對於高溫抗拉強度之影響在各個試驗溫度之優劣順序皆為球狀石墨鑄鐵>縮狀石墨鑄鐵>片狀石墨鑄鐵。 耐熱鑄鐵之耐熱震性整體而言,石墨型態對於鑄鐵之耐熱震性的順序為球狀石墨鑄鐵>縮狀石墨鑄鐵>片狀石墨鑄鐵;基地組織之耐熱震性順序為波來鐵>沃斯田鐵>肥粒鐵;添加合金的耐熱震性以 20 % Ni-2 % Cr>0.5 % Cr> 無添加合金試片。 |
英文摘要 | Heat Resistant Cast Irons have been used in high temperature environment, so it must have excellent high temperature properties, such as high temperature tensile strength, high temperature fatigue strength and thermal shock resistance. The objective of this study is to investigate the high temperature strength property and thermal shock resistance of the heat resistant cast irons. The effects of matrix structure (ferrite, pearlite and austenite), graphite morphology (flake, compacted/vermicular, spheroidal) and alloying element (Cr,Ni) on the high temperature tensile strength and thermal shock resistance at different temperatures (1073K, 873K and 673K) of cast irons have been evaluated in this study. According to the results of this study know that, as a whole, the order of high temperature tensile strength for alloying element is that 0.5%Cr>20%Ni-2%Cr>none alloy addition at R.T., 673K, and 873K; but the order is that 20%Ni-2%Cr>0.5%Cr>none alloy addition at 1073K. The order of high temperature tensile strength for the matrix strcutures is that pearlite>austenite>ferrite; but the order is that austenite>pearlite>ferrite at 1073K. The order of high temperature tensile strength for various graphite morphology is that spheroidal >c/v>flake at vaious test temperature. For thermal shock resistance of cast irons, the order of thermal shock resistance for graphite morphology of cast iron is that speroidal>c/v>flake. The order of thermal shock resistance for matrix is austenite>pearlite>ferrite. The order of thermal shock resistance for alloying element is that 20%Ni-2%Cr>0.5%Cr>none alloy addition. Quality Index of High Temperature Strength Property (Qhtsp) is obtained for evaluating the high temperature property of the heat resistant cast iron by analysis and evaluation. t is showed has high accuracy and can be used as an important index and reference. We also derive the regression equation of thermal shock cycle to shape factor (Fs) and matrix factor (Fm) for the heat resistant cast iron at 1073K by regression analysis method. |
本系統中英文摘要資訊取自各篇刊載內容。