10B33之機械性質與破斷面顯微結構隨回火溫度的演化探討

The Evolution of the Mechanical Properties and Microstructure of 10B33 Steel with Tempering Temperature

葉松瑋(S. W. Yeh)；唐焌瑄(S. S. Tang)；許進忠(J. J. Hseu)；林俊宏(J. H. Lin)

10B33 ； 熱處理 ； 回火脆性 ； 機械性質 ； 微觀組織 ； 10B33 ； heat treatment ； tempering brittleness ； mechanical properties ； microstructures

鑄造工程學刊

48卷2期（2022 / 12 / 01）

39 - 44

繁體中文;英文

本研究選用10B33鋼材作為研究對象，因為其材料特性優異以及在業界應用範圍廣泛因此廣受注意，我們將鋼料矯直後，整個材料熱處理過程可分為（1）正常化熱處理：在870℃持溫一個小時來進行（2）淬火：放入約80℃的淬火油中急速冷卻（3）回火熱處理：將經過淬火後的試片以每隔50℃為一間隔溫度，在150～700℃的溫度區間，進行持溫回火兩小時。並將各種熱處理條件之測試樣品分別進行硬度、衝擊、拉伸試驗及電子顯微鏡的觀察來分別測量其硬度值、衝擊值與抗拉強度，降伏強度、伸長率等機械性質，以及破斷面微觀的顯微組織觀察。結果顯示在10B33經回火熱處理後，只有在250℃的回火溫度附近，表現出些微的低溫回火脆性的特性外，整體具有極佳的機械性質表現。

In this study, 10B33 steel was selected as the research object, because of its excellent material properties and wide range of applications. After straighten the steel, the entire heat treatment follows the listed process (1) Normalized heat treatment: at 870℃ (2) Quenching: put it into quenching oil of about 80℃ for rapid cooling (3) Tempering heat treatment: after quenching the test samples are set at each tempering temperature for two hours in the range from 150 to 700℃. The samples under various heat treatment conditions were subjected to hardness, impact, tensile test and electron microscope observation to obtain their hardness, impact value, tensile strength, yield strength, elongation and cross-sectional features. The results indicated that after the tempering heat treatment of 10B33, only in the tempering temperature range of 250 ℃, it exhibits a slight low-temperature tempering brittleness, and the overall performance of the mechanical properties is excellent.

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