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題 名 | 鉻、錳及合金液態溫度對常壓熔煉無鎳含氮不銹鋼沃斯田鐵化影響之研究=The Study of the Influence of Cr, Mn and Liquid Alloy Temperature on Austenitization for Nickel-free Nitrogen Stainless Steel in Atmospheric Melting |
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作 者 | 黃禮汶; 孫道中; 施均崴; 周宜弘; 曹申; | 書刊名 | 鑄造工程學刊 |
卷 期 | 34:1=136 2008.03[民97.03] |
頁 次 | 頁13-18 |
分類號 | 454.85 |
關鍵詞 | 含氮不鏽鋼; 沃斯田鐵化; Ni當量; Nitrogen stainless steels; Austenitization; Ni equivalent; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究使用MnN為合金中N的來源,在大氣下配置Fe-13~18wt%Cr-14~19wt%Mn-0.08wt%C之無鎳含氮不銹鋼,探討Cr含量、Mn含量及液態合金溫度(澆鑄溫度)對合金中N含量及沃斯田鐵化的影響,並檢視Hull對鑄造不銹鋼所提出合金組成與微結構關係圖中元素對Ni當量計算值的準確性。實驗結果顯示,在本研究中所配置的含氮合金均完全沃斯田鐵化,呈現FCC單一相,其N含量最高可達0.77wt%,合金中N含量隨Cr與Mn含量增加而上升,且合金在高Cr含量時,尤其有利於N的吸收,而不同澆鑄溫度對合金中N含量並無明顯作用。硬度量測結果顯示,在本研究合金組成範圍內,Cr、Mn或N的含量對合金硬度無明顯影響。經檢視合金晶體結構與化學成份,對本研究無鎳、高錳、含氮不鏽鋼而言,發現其Hull所提出Ni當量計算值有偏低的趨勢。 |
英文摘要 | This study used MnN as a nitrogen additive to synthesize the Fe-13~18wt%Cr-14~19wt% Mn-0.08wt%C nickel-free nitrogen stainless steels in air. The influences of the Cr content, the Mn content and the temperature of melt (casting temperature) on the N content and the austenitization of alloy were discussed. The accuracy of Ni equivalent (Ni(subscript eq)) in Hull diagram which correlated compositions with microstructures was also inspected. The results show that all alloys with N addition are fully austenitizing and exist a single FCC phase. The maximum value of N content in alloy can reach 0.77wt%. The N content will increase with the increase of Cr and Mn content. The alloy with high Cr content has a great advantage of N absorption. There is no distinct variation of N content in alloy at different casting temperature. The Cr, Mn or the N content not obviously affect the alloy hardness. After inspection of the crystalline structure and the chemical composition, of the present nickel-free nitrogen alloys, it is found that the value of Ni equivalent proposed by Hull tends to be lower. |
本系統中英文摘要資訊取自各篇刊載內容。