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SAE10B21絲回火條件與其機械性質相互關係之研究 = The rel...

國立高雄大學化學工程及材料工程學系碩士班

SAE10B21絲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 SAE 10B21 screw

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 SAE 10B21 screw
作者:	李雅雯,
其他團體作者:	國立高雄大學
出版地:	[高雄市]
出版者:	國立高雄大學;
出版年:	2015[民104]
面頁冊數:	[10]，134葉圖，表 : 30公分;
標題:	扭力
標題:	Torque value
電子資源:	https://hdl.handle.net/11296/cq24uy
附註:	109年11月18日公開
摘要註:	本研究旨在研究自中鋼(CSC) 10B21低碳含硼合金鋼(等級GCWQ2)承製尺寸M5X90mm的木螺絲，在滲碳淬火後不同回火條件對於敲擊彎曲度的斷裂要求，進而探討對木用螺絲之機械性質影響：如表面硬度、心部硬度、滲碳深度、扭力、敲擊彎曲度及外觀等差異關係，並透過顯微組織觀察，期能達到品質性能符合客戶需求，提高產品質量及巿場競爭力。材質10B21在美國SAE J403-2001屬於低碳合金鋼，性能屬碳素硼鋼，加入合金元素B（硼），可生產10.9級系列及以下產品；具硬化後更大的彎曲角度。由本研究結果顯示，10B21建築木用螺絲在回火溫度(200℃、270℃、340℃)越高，扭力值會越低：硬度推移曲線呈現往前推移現象，有效硬化深度及全硬化深度隨之遞減；表面及中心硬度呈線性下降趨勢；敲擊彎曲角度隨之反向遞增；抗拉與降伏強度呈先升後降之趨勢。表面硬度與伸長量似乎無直接關係；拉伸量呈先升後降之趨勢。螺絲經淬火後，回火時間設定為15分鐘，回火溫度在270℃時最為穩定，可得扭力為103kgf.mm2，標準差為最小：表面硬度為HV578；中心硬度平均值為HV399；有效硬化深度(ECD) 距表面20μm，全硬化深度(TCD) 距表面100μm；可承受敲擊彎曲度大於59°；抗拉強度為162 kgf.mm2；降伏強度為145 kgf.mm2；拉伸量為4.95mm，建議為回火溫度270℃為最佳製程參數。 The purpose of the study is take M5X90mm wood screws that were made of 10B21 low carbon boron steel (grade GCWQ2) by China Steel Corporation(CSC) to investigate the relationship between different tempering conditions and breaking requirement of bending angle after carburizing, and discuss farther on influence of the mechanical properties of wood screws, such as surface hardness, core hardness, carburizing depth, torque, bending angle ,appearance and etc., through the microstructure observation, hope the quality performance meet customer’s demand and improve product quality and market competitiveness. 10B21 belongs to low-carbon steel in SAE J403-2001 the property is carbon boron steel, adding alloy element B (boron), so it can be used to screws with calss 10.9 and under class 10.9 the bending angle was greater after hardening. The experimental result showed the tempering temperature (200 ℃, 270 ℃, 340 ℃) of 10B21 wood screws was higher, the torque value became lower ; the hardness diagram moved forward, the Effective Case Depth(ECD) and Total Case Depth(TCD) was decreased; the surface hardness and core hardness were decreased linearly; the bending angle was increased reversely; tensile strength and yield strength were decreased after an initial increase; the surface hardness was no related to the elongation; the elongation seems that was decreased after an initial increase. After the screws were quenched, set up the tempering time for 15 minutes in crease and the tempering temperature at 270 ℃, the torque value was more stable at 103kgf.mm² and the standard deviation was smallest; the surface hardness was HV578; the core hardness average was HV399; the Effective Case Depth(ECD) from the surface was 20μm, the Total Case Depth(TCD) from the surface was 100μm; the bending angle was greater than 59 °; the tensile strength was 162 kgf.mm² ; the yield strength was 145kgf.mm² ; the elongation was 4.95mm. The tempering temperature( 270 ℃) was recommended to be the best production condition.

SAE10B21絲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 SAE 10B21 screw
李, 雅雯

SAE10B21絲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 SAE 10B21 screw / 李雅雯撰 - [高雄市] : 國立高雄大學, 2015[民104]. - [10]，134葉 ; 圖，表 ; 30公分.
109年11月18日公開.
參考書目：葉121-123.
扭力Torque value

SAE10B21絲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 SAE 10B21 screw
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