• 作者： 周釋善; 洪慈信
• 作者服務機構： 國立成功大學冶金及材料工程學系
• 中文摘要： 吹氧精煉不銹鋼，目前都分別採用大量氬氣體或真空爐，以達到脫碳並防止鉻氧化之效果。參考此二程式之技術和結論，本文試在 100～300 mm Hg 減壓爐中，以氧氣混合較少量之氬氣體進行吹煉，探討其脫碳效果及精煉之可行性。 由兩脫碳理論模式－Asai-Muchi Model 與 Fruehan Model 導出數學模型，其理論計算值和 L.F. Barnhardt 在大氣壓下實驗結果比較，證實此二理論是正確適用的。 實驗取減壓脫碳、大氣壓下吹煉、減壓吹煉三個程序，在高週波電爐進行。發現在100 mm Hg 爐壓，O ：Ar＝1 ; 1 之混合氣體，在 60 分鐘內，0.32%降到 0.02%，鉻損失值在1.0嗚以下。顯示其對精煉低碳不鐫鋼深具效益。 運用理論數學模型及減壓吹煉之結果，得在 100～760 mm Hg爐壓下，脫碳反應速率參數α，在 Asai-Muchi Model 係 0.06 x 10 ～0.09 x 10　，Fruehan Model 係 0.025×10 ～0.05 x 10 ，並以Fruehan Model之計算較簡易精確省時。
• 英文摘要： The prevailing methods used in the industrialscale of the Oxygen Stainless Steelmaking Pro-cess, preserving Cr while removing C, are thehigh flow rate of Ar or refining under reducedpressure. Combining these two processes, wedevelope a possibly more efficient process. Thisresults from the following changes, the pressureto 100-300 mm Hg atmos. and uses a highoxygen potential O -Ar mixture in producingdecarburization and stainless steel refinement. The two mathematic models are based onthe mechanism models of Asai-Muchi Modeland Fruehan. The agreement between experi-mental measurements of L.F. Barnhardt and thetheoretical predictions are fairly accurate byusing a value of the rate parameter. The experiments in Induction Furnace pro-cess vaccum decarburizing, O -Ar mixture blow-ing in air, O -Ar mixture blowing under re-duced pressure. The results under 100 mm Hgatmos., O ：Ar=1：1 mixture blowing and in60 mins is, C changing from 0.32% to 0.02%and the Cr loss under 1.0%, the outcome beingan effective refining process. According to the experimental measurements,it was concluded that under 100-760 mm Hgatmos., the rate parameters of two mathematicmodels are, Asai-Muchi Model α =0.06×10 -0.09 x 10 and Fruehan Model α =0.025 x 10-0.05 x 10 The Fruehan Model predicts accu-rately and calculates easily.
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