臺灣大學: 材料科學與工程學研究所連雙喜馮天榮Feng, Tian-RungTian-RungFeng2013-03-222018-06-282013-03-222018-06-282011http://ntur.lib.ntu.edu.tw//handle/246246/251673鐵-矽-硼為製造非晶質薄帶合金，主要用途為馬達及變壓器鐵心等重要材料，而鐵-矽-硼合金冶煉後之清淨度將影響未來非晶質薄帶的品質、效能及壽命。因此本論文主要是在探討不同成份下之清淨度及澆鑄前持溫不同時間對於介在物之影響，及非晶質薄帶合金對介在物作分析。 研究首先以熱力學軟體Thermo-Calc計算不同成份之熔點及相的分佈來比對實驗之差異性。再利用金相觀察以及電子顯微分析介在物之成份及形貌，量測鋼中之總氧與硫含量，探討熔煉後所生成之介在物，與孔洞大小，並用高溫接觸角儀器量測不同成份鋼之熔點與表面張力，以期望得到孔洞，介在物與熔點表面張力之關係。期望提供熔煉鐵-矽-硼合金鋼的清淨度有所助益。 結果發現模擬不同成份下之熔點值，與實驗量測之熔點誤差小於5%。測量之表面張力值隨著孔洞及鋼液之總氧與硫含量增加而降低，而介在物主要可分為三種類型居多分別為(Ca-Si-Al-Mg)Ox、MnS及微量之(Ca-Si-Al-Mg)Ox及包覆型其內部為Al2O3，外部為MnS之成份含量的複合介在物。Fe-Si-B amorphous alloy ribbon is an important material, mainly used in motor and transformer cores. Transformer’s quality, performance, and life will be affected by its cleanness. The study explores the cleanness of Fe-Si-B amorphous alloy ribbon between different components, the status of inclusion for holding temperature different times and analysis of inclusion in the product. The study will be achieved as followings: First, calculating the phase diagram distribution and melting point of different components by thermodynamic calculation software Thermo-calc to examine the experiments. Then observing the composition and morphology of inclusion by SEM and measuring the numbers of inclusions, total amount of O & S, and porous size. After that, measuring melting point and surface tension of steels by high-temperature contact angle measuring instruments. The results showed that the melting point error is less than 5% between simulation and real, and the surface tension decreased by increase of porosity and amounts of O & S. For inclusion analysis, there are three basic components as follows: (Ca-Si-Al-Mg)Ox, . MnS, and Al2O3.6871045 bytesapplication/pdfen-US非晶質薄帶表面張力Thermo-Calc高溫接觸角介在物Amorphous alloy ribbonsSurface tensionContact angles in high temperatureInclusionthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/251673/1/ntu-100-R98527053-1.pdf