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SCM435螺栓回火條件與其機械性質相互關係之研究 = The rela...

國立高雄大學化學工程及材料工程學系碩士班

SCM435螺栓回火條件與其機械性質相互關係之研究 = The relationship between tempering process and mechanical properties of JIS SCM435 bolt

紀錄類型:	書目-語言資料,印刷品 : 單行本
並列題名:	The relationship between tempering process and mechanical properties of JIS SCM435 bolt
作者:	成建德,
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:	2013[撰]
面頁冊數:	150面圖，表格 : 30公分;
標題:	SCM435
標題:	SCM435
電子資源:	http://handle.ncl.edu.tw/11296/ndltd/48823238133667273583
附註:	參考書目：面130-136
附註:	102年10月31日公開
摘要註:	扣件製程中實行熱處理，其目的是為了使材料內部或者表面層的組織發生變化進而達到所預期的機械強度及品質特性。本研究以材質為鉻鉬高強度鋼JIS SCM435、尺寸M14、牙距2.0的螺栓進行一系列的熱處理程序，其目的是為了要找出在不同回火條件下與其對應的機械性質的相互關係。本研究先探討由Hollomon和Jaffe所提出的回火關係式，並深究其最原始的關係式的組成元素，而後再實際以實驗數據應用於H-J回火方程式中，找出其癥結點所在。最後提出一個新的計算回火程度當量的數學模組，此模組與H-J方程式的不同點在於H-J回火參數所描述的是硬度與回火條件間的間接關係，而本論文所提出的為一個直接關係。新的數學模組是以鋼的球化退火、淬火以及回火態的硬度值作為扣件熱處理製程的基本參數，並嘗試使用Arrhenius擴散方程式與Johnson-Mehl-Avramie相轉換模組描述此製程參數之行為，用以描述回火過程中時間、溫度及硬度之間的變化關係。實驗結果顯示Hollomon及Jaffe的回火參數方程式無法有效的將SCM435鋼製螺栓的回火條件對照到其硬度的變化。硬度試驗結果顯示SCM435鋼在溫度範圍460至560℃之間不會產生二次硬化的現象。在球化退火態的硬度為95HRB下進行沃斯田鐵化溫度890℃的油淬處理，所得的平均硬度為52.5HRC，而後在經溫度460至560℃、時間30至120分的回火條件組合，所得的平均硬度在30至41HRC之間。另外在拉伸試驗中，當回火溫度460℃、時間30至120分，所對應的抗拉強度為1331.43至1254.03MPa；回火溫度560℃、時間30至120分，所對應的抗拉強度為1037.49至969.13 MPa。扣件熱處理製程參數（Hp）可以明確描述扣件的回火態相對於淬火態的硬化程度或是相對於退火態的軟化程度，本研究將此值當成定量回火關係當量的主要元素，藉由使用動力學及擴散學的相關數學模組找出可以很好的描述其行為的式子，最後將實際實驗硬度值代入到新的模組中，結果顯示實驗值及計算值可以獲得很好的吻合。 The purpose to process heat treatment in the manufacturing process of the fastener is to achieve the expected mechanical strength and quality by transferring the microstructure inside or on the surface of the material. In this study, the Cr-Mo high-strength steel bolt (JIS SCM435), bolt size: M14(mm), thread pitch: 2.0(mm) used in a series of heat treatment was to find the relation of the mechanical properties in the different tempering conditions. The first direction of this study reviewed the original derivation of the Hollomon-Jaffe tempering parameter concept from literatures, and then employed the Hollomon-Jaffe tempering parameter by using my experimental data to identify the sticking point. This study employed the hardness values of spheroidizing annealing, quenching and tempering in the heat treatment process of the fastener as the basic parameters, and tried to combine Arrhenius equation and Johnson-Mehl-Avramie equation to describe the variation of various parameters of tempering process. For the experimental results showed that Hollomon and Jaffe tempering parametric equation could not describe the tempering process of SCM435 steel bolt properly, and also SCM435 steel at the temperature（460 to 560 ℃） did not produce secondary hardening phenomenon. Hardness test results were shown that the average hardness value was 52.5HRC at the austenitizing temperature 890℃ (oil quenching) under the hardness value（95HRB）of spheroidizing annealing state ,and after the process of tempering temperature (460 to 560℃)、time(30 to 120 min) the average hardness values were between 30 and 41HRC .In addition , the tensile test results were shown that tensile strength values were 1331.43 to 1254.03 MPa under the tempering temperature(460℃ ), time( 30 to 120 min) and the tensile strength values were 1037.49 to 969.13 MPa under the tempering temperature(560℃ ), time( 30 to 120 min) . It means as the tempering temperature increase, the tensile strength will decrease. Fastener heat treatment process parameter (Hp) could explicitly describe the degree of hardening at tempering state between quenching and spheroidizing annealing state. The value (Hp) will be essential to research tempering relations. Finally, Hp combined with the diffusion and kinetic relations of tempering process from literature and then derived tempering relation equation. If this relation equation is correct, then any hardness values of tempering states will be calculated.

SCM435螺栓回火條件與其機械性質相互關係之研究 = The relationship between tempering process and mechanical properties of JIS SCM435 bolt
成, 建德

SCM435螺栓回火條件與其機械性質相互關係之研究 = The relationship between tempering process and mechanical properties of JIS SCM435 bolt / 成建德撰 - [高雄市] : 撰者, 2013[撰]. - 150面 ; 圖，表格 ; 30公分.
參考書目：面130-136102年10月31日公開.
SCM435SCM435

SCM435螺栓回火條件與其機械性質相互關係之研究 = The relationship between tempering process and mechanical properties of JIS SCM435 bolt
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