- 期刊
真空熱壓燒結溫度對鈷鉻鉬鈮合金其顯微組織與材料特性之影響
Effects of the Vacuum Hot-Press Sintering Temperature on the Microstructures and Material Characteristics of Co-Cr-Mo-Nb Alloys
摘要
本研究係以真空熱壓燒結法製備鈷鉻鉬鈮合金，將不同含量的次微米級鈷粉（700 nm）和微米級鉻（1～2 μm）、鉬（5 μm）與鈮（50 μm）粉進行球磨混合，並利用不同熱壓燒結溫度（1050°C、1100°C、1150°C及1200°C），來探討不同熱壓燒結製程對鈷鉻鉬鈮（Co-30Cr-6Mo-2Nb）合金之最佳參數，並分析其顯微組織和材料特性之變化。研究結果顯示，最佳熱壓燒結參數為燒結溫度1100°C、壓力20 MPa 及持壓時間1小時，此製程生產之Co-30Cr-6Mo-2Nb具有較佳的機械性質與不錯的電導率，其燒結密度增加至8.15 g．cm^(-3)，硬度和橫向破裂強度分別為77.1 HRA及2345.9 MPa，而電導率為1.99×10^4 S．m^(-1)。綜合上述結果顯示，利用熱壓燒結能有助於鈷鉻鉬鈮合金的燒結行為，並在較低溫度時，有效地改善其機械性質。
並列摘要
In this work, Co-Cr-Mo-Nb alloys were fabricated by vacuum hot-press sintering. Different amounts of submicron cobalt powders (700 nm) and micron chromium powders (1-2 μm), molybdenum powders (5 μm), and niobium powders (50 μm) were respectively mixed by ball milling. The experiments utilized hot-press pressures 20 MPa and hot-press sintering temperatures (1050°C, 1100°C, 1150°C and 1200°C) to find the optimal parameters for cobalt-based alloys (Co-30Cr-6Mo-2Nb), while simultaneously investigating the differences in microstructures and characteristics. As a result, the optimal parameters for the second part of this research were 1100°C at 20 MPa for 1 h. The Co-30Cr-6Mo-2Nb alloys possessed the appropriate mechanical properties and better electrical properties. Among them, the sintering density was enhanced to 8.15 g．cm^(-3) and the hardness and TRS reached 77.1 HRA and 2345.9 MPa, respectively. The electrical conductivity was 1.99×10^4 S．cm^(-1). According to the above discussion and results, it was reasonable to conclude that the sintering behavior was effectively enhanced and the mechanical properties were improved at a relatively lower sintering temperature for Co-30Cr-6Mo-2Nb alloys by the hot-press sintering process.
延伸閱讀
- 陳敬騏（2012）。真空燒結與熱均壓處理對鎳鉻合金靶材微結構及其性質之影響〔碩士論文，國立臺北科技大學〕。華藝線上圖書館。https://doi.org/10.6841/NTUT.2012.00699
- 張世賢、張博堯、張智堯、李健綸（2016）。不同真空熱壓燒結製程溫度對Cr_(50)Ti_(50)合金其顯微組織與材料特性之影響。鑛冶：中國鑛冶工程學會會刊，60(4)，75-82。https://doi.org/10.30069/MM.201612_60(4).0008
- 張世賢、林頌軒、蕭翊展、張智堯（2017）。真空熱壓燒結壓力對Co-30 wt% Cr合金顯微組織與材料特性之研究。鑛冶：中國鑛冶工程學會會刊，61(4)，89-95。https://doi.org/10.30069/MM.201712_61(4).0008
- 張世賢、林隆議、林頌軒、王嘉樂（2019）。真空熱壓燒結壓力對Cr-60 wt% Si合金顯微組織與材料特性之研究。鑛冶：中國鑛冶工程學會會刊，63(1)，59-66。https://doi.org/10.30069/MM.201903_63(1).06
- 張世賢、陳敬騏、梁誠、陳思宏（2011）。Effects of Vacuum Sintering and Hot Isostatic Pressing Processes on the Microstructure and Properties of Cr50Cu50 Alloy Targets。鑛冶：中國鑛冶工程學會會刊，55(4)，22-26。https://doi.org/10.30069/MM.201112.0004