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冷卻液對M2高速鋼硬度及微觀組織的影響 = The effect of ...

國立高雄大學化學工程及材料工程學系碩士班

冷卻液對M2高速鋼硬度及微觀組織的影響 = The effect of coolant on the hardness and microstructure of the M2 high speed steels

紀錄類型:	書目-語言資料,印刷品 : 單行本
並列題名:	The effect of coolant on the hardness and microstructure of the M2 high speed steels
作者:	方建中,
其他團體作者:	國立高雄大學
出版地:	[高雄市]
出版者:	撰者;
出版年:	2014[民103]
面頁冊數:	109面圖，表 : 30公分;
標題:	高速鋼
標題:	high speed steel
電子資源:	http://handle.ncl.edu.tw/11296/ndltd/72943224103140727060
附註:	參考書目：面92-95
附註:	103年12月16日公開
摘要註:	硬度是鋼鐵材料最重要的機械性質之一，其數值的大小與切削、耐磨耗能力有密不可分的關係。本研究以AISI M2 高速鋼作為研究材料，將1200℃沃斯田鐵化的試片持溫150秒後，用不同參數冷卻液進行淬火並再進行一到三次的2 小時400℃回火。試片先弱王水腐蝕再用洛氏硬度機測其硬度，再以OM 及SEM 進行微觀組織的觀察。用影像分析軟體進行碳化物的定量分析。冷卻液本身的性質則利用標準方法量測與公式計算得之。最後找出硬度、碳化物比例與冷卻液相關數據的關聯所在。本實驗的研究發現，相較於65℃冷卻液的使用，以25℃的冷卻液淬火讓試片得到較高的硬度及碳化物比例。冷卻液溫度及比熱與淬火硬度呈反比的關係，冷卻液黏度、比重及熱傳導率與淬火硬度呈正比的關係。溫度變化對冷卻液各性質的數值影響大小程度為：黏度 > 比熱 > 比重 = 熱傳導率。 Hardness is one of the most important mechanic properties in steel materials. The magnitude of hardness has an inseparable relationship with the cutting ability and the wear resistance.In this study, we select the AISI M2 high speed steel as research material. Heat treatment was carried out at 1200℃ solution temperature and the hold time was 150 seconds. The specimens were quenched with the coolant of different parameters and were then tempered at 400℃ for 2 hours for one to three times. The specimens were etched with weak Aqua regia before determining the hardness by manipulating the Rockwell hardness tester. The microstructure observation of these specimens was performed with the optical microscope and the field emission scanning electron microscope. The carbide quantification was performed with the means of Image pro-plus software. Finally, we find out the relationship among the hardness, carbide fraction of the specimen and the related data of the coolant.The experimental studies showed that comparing to the use of 65℃ coolant, the use of 25℃ coolant resulted in higher hardness and carbide fraction in the specimen. The coolant temperature and specific heat had the inversely proportional relationship with the quenching hardness of the specimen; the coolant viscosity, specific gravity and thermal conductivity had the proportional relationship with the quenching hardness of the specimen. The order of the temperature effect on the numerical size of each character of the coolant is the following: Viscosity > specific heat > specific gravity = thermal conductivity.

冷卻液對M2高速鋼硬度及微觀組織的影響 = The effect of coolant on the hardness and microstructure of the M2 high speed steels
方, 建中

冷卻液對M2高速鋼硬度及微觀組織的影響 = The effect of coolant on the hardness and microstructure of the M2 high speed steels / 方建中撰 - [高雄市] : 撰者, 2014[民103]. - 109面 ; 圖，表 ; 30公分.
參考書目：面92-95103年12月16日公開.
高速鋼high speed steel

冷卻液對M2高速鋼硬度及微觀組織的影響 = The effect of coolant on the hardness and microstructure of the M2 high speed steels
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328 $a 碩士論文--國立高雄大學化學工程及材料工程學系碩士班
330 $a 硬度是鋼鐵材料最重要的機械性質之一，其數值的大小與切削、耐磨耗能力有密不可分的關係。本研究以AISI M2 高速鋼作為研究材料，將1200℃沃斯田鐵化的試片持溫150秒後，用不同參數冷卻液進行淬火並再進行一到三次的2 小時400℃回火。試片先弱王水腐蝕再用洛氏硬度機測其硬度，再以OM 及SEM 進行微觀組織的觀察。用影像分析軟體進行碳化物的定量分析。冷卻液本身的性質則利用標準方法量測與公式計算得之。最後找出硬度、碳化物比例與冷卻液相關數據的關聯所在。本實驗的研究發現，相較於65℃冷卻液的使用，以25℃的冷卻液淬火讓試片得到較高的硬度及碳化物比例。冷卻液溫度及比熱與淬火硬度呈反比的關係，冷卻液黏度、比重及熱傳導率與淬火硬度呈正比的關係。溫度變化對冷卻液各性質的數值影響大小程度為：黏度 > 比熱 > 比重 = 熱傳導率。 Hardness is one of the most important mechanic properties in steel materials. The magnitude of hardness has an inseparable relationship with the cutting ability and the wear resistance.In this study, we select the AISI M2 high speed steel as research material. Heat treatment was carried out at 1200℃ solution temperature and the hold time was 150 seconds. The specimens were quenched with the coolant of different parameters and were then tempered at 400℃ for 2 hours for one to three times. The specimens were etched with weak Aqua regia before determining the hardness by manipulating the Rockwell hardness tester. The microstructure observation of these specimens was performed with the optical microscope and the field emission scanning electron microscope. The carbide quantification was performed with the means of Image pro-plus software. Finally, we find out the relationship among the hardness, carbide fraction of the specimen and the related data of the coolant.The experimental studies showed that comparing to the use of 65℃ coolant, the use of 25℃ coolant resulted in higher hardness and carbide fraction in the specimen. The coolant temperature and specific heat had the inversely proportional relationship with the quenching hardness of the specimen; the coolant viscosity, specific gravity and thermal conductivity had the proportional relationship with the quenching hardness of the specimen. The order of the temperature effect on the numerical size of each character of the coolant is the following: Viscosity > specific heat > specific gravity = thermal conductivity.
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