國立高雄大學圖資館 |

語系: 繁體中文

說明(常見問題)

圖資館首頁

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

應變及冷卻速率對鉻鉬鋼顯微組織及高溫機械性質影響之研究 = The st...

國立高雄大學化學工程及材料工程學系碩士班

應變及冷卻速率對鉻鉬鋼顯微組織及高溫機械性質影響之研究 = The study of strain and cooling rate on the microstructure and high temperature mechanical properties of Cr-Mo steel

紀錄類型:	書目-語言資料,印刷品 : 單行本
並列題名:	The study of strain and cooling rate on the microstructure and high temperature mechanical properties of Cr-Mo steel
作者:	孫宏誠,
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:	2012[民101]
面頁冊數:	163面圖，表格 : 30公分;
標題:	鉻鉬鋼
標題:	Chrome-molybdenum steel
電子資源:	http://handle.ncl.edu.tw/11296/ndltd/14289573084220662756
附註:	參考書目：面137-148
摘要註:	本研究以風力扣件用之鉻鉬高強度鋼（SCM440）為實驗鋼材，以DSC探討其高溫熱行為，接著Gleeble 3500及Gleeble 1500探討高溫加工性質，並據所得之數據進行組成方程式之探討，另外，輔以顯微組織以探討風力扣件用之鉻鉬鋼（SCM440）高溫塑性行為。　　由本研究實驗結果中顯示，SCM440於溫度（600oC-1200 oC），以不同應變速率下加工（0.1s-1、1s-1、10s-1）均可產生動態再結晶，而達到晶粒細化增加強韌性，並根據所得之真實應力應變曲線圖，以Zener-Hollomon與Hyperbolic sine law進行計算，可取得SCM400於最高流變應力（σp）之活化能Q為294641.15J/mol，進而可求得高溫流變應力之預測公式，並可發現與實際所測得最高應力相差僅為4.6%，顯示此組成方程式可成功應用於SCM440高溫流變應力之預測。同時，根據Poliak與Jonas所建立之方法，亦進行臨界動態再結晶之預測，並進一步將臨界應力與lnZ值進行擬合。此外，並根據壓縮後其顯微組織之變化以Z值區分完全動態再結晶與非完全動態再結晶，當SCM440於高溫塑變之lnZ值小於23.28時，其組織傾向產生完全動態再結晶，反之，當lnZ值大於25.26時，其組織則傾向產生部分動態再結晶。　　此外，亦針對SCM440於不同應變、冷卻速率下其顯微組織影響進行探討，可發現於不明顯降低硬度值為前提下，Ae3溫度以上僅有應變速率1s-1可得到2~3μm之肥粒鐵，而於Bs溫度以上則可發現應變速率0.1s-1及1s-1則皆可得到2~6μm之肥粒鐵。此外亦可觀察到以應變速率1s-1進行壓縮時，隨著其冷卻速率之不同，將產生不同程度之靜態再結晶，使其晶粒隨著冷卻過程變小。　　This study is focused on a Cr-Mo high-strength steel （SCM440） used as fasteners for Wind Turbine System. The differential Scanning Calorimetry （DSC） was applied to analyze the thermal property. The Gleeble 3500 and Gleeble 1500 hot tensile machines were used to develop the constitutive equation and investigate microstructure evolution to study the hot deformation behavior of Cr-Mo high-strength steel （SCM440） used as fasteners for Wind Turbine System.　　The results showed that dynamic racrystallization phenomenon was observed under different strain rates （0.1s-1、1s-1、10s-1） and temperatures （600oC-1200oC）. On the basis of engineering stress-strain curves, the Zener-Hollomon and Hyperbolic sine law equations were used to determine the activation energy (Q). It was found that the activation energy was 294,641J/mol at peak flow stress and further obtained the flow stress (σp) constitutive equation to predict the peak stress of SCM440. The results showed that the mean error (%) was 4.6% between predicted and measured peak flow stress. It indicated that the constitutive equation was successfully applied to predict the peak stress of SCM440 under hot forging. Simultaneously, according to the method of Poliak and Jonas, this study also predicted the critical state of dynamic recrystallization and the critical stress of dynamic recrystallization were fitted with the value of lnZ.　　Moreover, on the basis of microstructure evolution during hot compression, this study distinguished between full and partial dynamic recrystallization by the value of lnZ. The microstructure had been induced full dynamic recrystallization when the value of lnZ was less than 23.28. On the other hand, the microstructure had been induced partial dynamic recrystallization when the value of lnZ was bigger than 25.26. Finally, this study also investigated the microstructure evolution under different strain and cooling rates. Under the premise that the hardness was not decreased, the microstructure obtained 2~3μm ferrite under strain rate 1s-1 during different cooling rates (5oC/s、10oC/s、20oC/s) upon Ae3 temperature and obtained 2~6μm ferrite under strain rates (0.1s-1、1s-1) during different cooling rates (5oC/s、10oC/s、20oC/s) upon Bs temperature. Furthermore, it was found the different degree of static recrystallization had been induced during different cooling rates (5oC/s、10oC/s、20oC/s) under strain rate 1s-1.

應變及冷卻速率對鉻鉬鋼顯微組織及高溫機械性質影響之研究 = The study of strain and cooling rate on the microstructure and high temperature mechanical properties of Cr-Mo steel
孫, 宏誠

應變及冷卻速率對鉻鉬鋼顯微組織及高溫機械性質影響之研究 = The study of strain and cooling rate on the microstructure and high temperature mechanical properties of Cr-Mo steel / 孫宏誠撰 - [高雄市] : 撰者, 2012[民101]. - 163面 ; 圖，表格 ; 30公分.
參考書目：面137-148.
鉻鉬鋼Chrome-molybdenum steel

應變及冷卻速率對鉻鉬鋼顯微組織及高溫機械性質影響之研究 = The study of strain and cooling rate on the microstructure and high temperature mechanical properties of Cr-Mo steel
LDR:05545nam a2200277 4500 001 345992
005 20170214101010.0
009 345992
010 0 $b 精裝
010 0 $b 平裝
100 $a 20170214d2012 k y0chiy05 e
101 1 $a chi $d chi $d eng
102 $a tw
105 $a ak am 000yy
200 1 $a 應變及冷卻速率對鉻鉬鋼顯微組織及高溫機械性質影響之研究 $d The study of strain and cooling rate on the microstructure and high temperature mechanical properties of Cr-Mo steel $z eng $f 孫宏誠撰
210 $a [高雄市] $c 撰者 $d 2012[民101]
215 0 $a 163面 $c 圖，表格 $d 30公分
300 $a 參考書目：面137-148
314 $a 指導教授：林東毅博士
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 本研究以風力扣件用之鉻鉬高強度鋼（SCM440）為實驗鋼材，以DSC探討其高溫熱行為，接著Gleeble 3500及Gleeble 1500探討高溫加工性質，並據所得之數據進行組成方程式之探討，另外，輔以顯微組織以探討風力扣件用之鉻鉬鋼（SCM440）高溫塑性行為。　　由本研究實驗結果中顯示，SCM440於溫度（600oC-1200 oC），以不同應變速率下加工（0.1s-1、1s-1、10s-1）均可產生動態再結晶，而達到晶粒細化增加強韌性，並根據所得之真實應力應變曲線圖，以Zener-Hollomon與Hyperbolic sine law進行計算，可取得SCM400於最高流變應力（σp）之活化能Q為294641.15J/mol，進而可求得高溫流變應力之預測公式，並可發現與實際所測得最高應力相差僅為4.6%，顯示此組成方程式可成功應用於SCM440高溫流變應力之預測。同時，根據Poliak與Jonas所建立之方法，亦進行臨界動態再結晶之預測，並進一步將臨界應力與lnZ值進行擬合。此外，並根據壓縮後其顯微組織之變化以Z值區分完全動態再結晶與非完全動態再結晶，當SCM440於高溫塑變之lnZ值小於23.28時，其組織傾向產生完全動態再結晶，反之，當lnZ值大於25.26時，其組織則傾向產生部分動態再結晶。　　此外，亦針對SCM440於不同應變、冷卻速率下其顯微組織影響進行探討，可發現於不明顯降低硬度值為前提下，Ae3溫度以上僅有應變速率1s-1可得到2~3μm之肥粒鐵，而於Bs溫度以上則可發現應變速率0.1s-1及1s-1則皆可得到2~6μm之肥粒鐵。此外亦可觀察到以應變速率1s-1進行壓縮時，隨著其冷卻速率之不同，將產生不同程度之靜態再結晶，使其晶粒隨著冷卻過程變小。　　This study is focused on a Cr-Mo high-strength steel （SCM440） used as fasteners for Wind Turbine System. The differential Scanning Calorimetry （DSC） was applied to analyze the thermal property. The Gleeble 3500 and Gleeble 1500 hot tensile machines were used to develop the constitutive equation and investigate microstructure evolution to study the hot deformation behavior of Cr-Mo high-strength steel （SCM440） used as fasteners for Wind Turbine System.　　The results showed that dynamic racrystallization phenomenon was observed under different strain rates （0.1s-1、1s-1、10s-1） and temperatures （600oC-1200oC）. On the basis of engineering stress-strain curves, the Zener-Hollomon and Hyperbolic sine law equations were used to determine the activation energy (Q). It was found that the activation energy was 294,641J/mol at peak flow stress and further obtained the flow stress (σp) constitutive equation to predict the peak stress of SCM440. The results showed that the mean error (%) was 4.6% between predicted and measured peak flow stress. It indicated that the constitutive equation was successfully applied to predict the peak stress of SCM440 under hot forging. Simultaneously, according to the method of Poliak and Jonas, this study also predicted the critical state of dynamic recrystallization and the critical stress of dynamic recrystallization were fitted with the value of lnZ.　　Moreover, on the basis of microstructure evolution during hot compression, this study distinguished between full and partial dynamic recrystallization by the value of lnZ. The microstructure had been induced full dynamic recrystallization when the value of lnZ was less than 23.28. On the other hand, the microstructure had been induced partial dynamic recrystallization when the value of lnZ was bigger than 25.26. Finally, this study also investigated the microstructure evolution under different strain and cooling rates. Under the premise that the hardness was not decreased, the microstructure obtained 2~3μm ferrite under strain rate 1s-1 during different cooling rates (5oC/s、10oC/s、20oC/s) upon Ae3 temperature and obtained 2~6μm ferrite under strain rates (0.1s-1、1s-1) during different cooling rates (5oC/s、10oC/s、20oC/s) upon Bs temperature. Furthermore, it was found the different degree of static recrystallization had been induced during different cooling rates (5oC/s、10oC/s、20oC/s) under strain rate 1s-1.
510 1 $a The study of strain and cooling rate on the microstructure and high temperature mechanical properties of Cr-Mo steel $z eng
610 0 $a 鉻鉬鋼 $a 高溫塑性行為 $a 組成方程式
610 1 $a Chrome-molybdenum steel $a High temperature deformation behavior $a Constitutive equation
681 $a 008M/0019 $b 541208 1230 $v 2007年版
700 1 $a 孫 $b 宏誠 $4 撰 $3 576232
712 0 2 $a 國立高雄大學 $b 化學工程及材料工程學系碩士班 $3 353898
801 0 $a tw $b NUK $c 20121107 $g CCR
856 7 $z 電子資源 $2 http $u http://handle.ncl.edu.tw/11296/ndltd/14289573084220662756