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高強度麻田散鐵不銹鋼高溫機械性質研究 = The Study of Hi...

國立高雄大學化學工程及材料工程學系碩士班

高強度麻田散鐵不銹鋼高溫機械性質研究 = The Study of High Temperature Mechanical Properties in High Strength Martensitic Stainless

Record Type:	Language materials, printed : monographic
Paralel Title:	The Study of High Temperature Mechanical Properties in High Strength Martensitic Stainless
Author:	陸柏儒,
Secondary Intellectual Responsibility:	國立高雄大學
Place of Publication:	[高雄市]
Published:	國立高雄大學;
Year of Publication:	2015[民104]
Description:	[11]，144葉圖，表 : 30公分;
Subject:	類麻田散鐵系不銹鋼
Subject:	High-temperature Mechanical Properties
Online resource:	https://hdl.handle.net/11296/3j2f3j
Notes:	109年11月18日公開
Summary:	鑽尾螺絲其「鑽尾」的設計已解決扣件使用上需要再預鑽孔的麻煩問題，對於已商業化的可熱處理硬化型的麻田散鐵不銹鋼SUS410，仍有其在於材料性質上存在一些突破點，如高溫鍛造可成形更複雜形狀之扣件、抑或是在於終端產品鑽尾螺絲的鑽尾部分的硬度的熱處理再提升。本研究採用13Cr-2Ni-2Mo 合金系統，使用真空感應熔煉並鑄造出所設定之成分合金，接著將鑄錠熱鍛造，而熱鍛造後材料直徑約19mm，隨後將試片進行高溫壓縮測試，並且進行高溫壓縮過程中熱處理條件模擬，以硬度、顯微結構、EDS 元素分析來加以探討合金於不同溫度之下相變化行為與材料高溫機械性質。於顯微組織方面發現固溶化處理後，越高的淬火溫度會有越多的麻田散鐵組織形成，冷卻過程中只要經過（δ+γ）兩相區，δ-Ferrite 均會殘留至室溫。高溫壓縮測試結果則顯示，大致上壓縮模數、最大壓縮應力皆有隨著壓縮溫度的上升而下降，說明材料軟化的過程。不過於較低的壓縮溫度即300 度和400 度，壓縮試片有觀察到大量的裂痕，顯示這個溫度可能不利於塑性加工。而往更高的壓縮溫度如700 度以上，工程應力-應變曲線出現持平現象，說明此溫度以上已達到材料「動態回復」的過程。 The "drilling" design of self-drillling screws has been developed to solve the troublesome problem that needs pre-drilled holes before using. For commercialized and it could be hardened by heat treatment of martensitic stainless steel SUS410, which have some material properties could be modified to enhance its performance. For example that we can use hot forging technology to forming a more complex shapes fastener, or improve the heat treatment process to enhance drilling tail hardening hardness. In this study, 13Cr-2Ni-2Mo alloy was used as the test material. We used a vacuum induction melting furnace to obtain the alloy with desired chemical composition. And then hot forging was carried out to obtain rod. The diameter of the hot forging rod was approximate of 19mm. High temperature compression test was performed by Gleeble 3800. All specimens were via solution treatment at 1200℃ for 5 min., and then cooled to test temperature of 300, 400, 500, 600, 700, 800, 900, 1000, and 1100℃. When temperature reached to the test specific temperature, specimens were by air cooling to room temperature. The examination of hardness and microstructure were carried out by OM, SEM, EDS, and Micro hardness tester. From observing the microstructure, we found that after the solution treatment, the higher the quenching temperature will have more of martensite phase. If the temperature has been gone through the (δ + γ) two-phase region, the δ-Ferrite would be residual to room temperature, and its chromium - molybdenum chemical element composition will be slightly higher than the base phase. High temperature compression tests showed the compression modulus and the maximum compressive stress have decreased as increasing the test temperature, so that is described as material softening process. But in lower compression temperature at 300 or 400℃, compression specimens have observed a lot of cracks. It shows those temperatures may not be good for plastic deformation. And for higher test temperatures, such as above 700℃, the engineering stress - strain curve appeared flat phenomenon, which means the material at this temperature "Dynamic recovery" occurred.

高強度麻田散鐵不銹鋼高溫機械性質研究 = The Study of High Temperature Mechanical Properties in High Strength Martensitic Stainless
陸, 柏儒

高強度麻田散鐵不銹鋼高溫機械性質研究 = The Study of High Temperature Mechanical Properties in High Strength Martensitic Stainless / 陸柏儒撰 - [高雄市] : 國立高雄大學, 2015[民104]. - [11]，144葉 ; 圖，表 ; 30公分.
109年11月18日公開.
參考書目：葉130-134.
類麻田散鐵系不銹鋼High-temperature Mechanical Properties

高強度麻田散鐵不銹鋼高溫機械性質研究 = The Study of High Temperature Mechanical Properties in High Strength Martensitic Stainless
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