Research on the Structural Changes of Cast Iron by Contact Meltlng with Various Oxides
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概要
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This investigation has been made to confirm how the structure of cast irons is influenced by oxides which constitute refractory and slag. Synthetic Fe-C and Fe-C-Si cast irons have been melted in contact with the various oxides under oxidizing atmosphere, argon and carbon monoxide at 1 atm. pressure at 1, 300 and 1, 350℃. The experimental results and the considerations are as follows : (1) In the case of the oxidizing atmosphere, the structure of synthetic Fe-C-Si cast irons becomes eutectic graphite or white cast iron structure. The structural changes are strongly controlled by the oxidation of the oxidizing atmosphere. (2) In the cases of argon and carbon monoxide, the original flake graphite structure becomes fine in the order SiO_2, MgO, BaO or CaO. In the case of Al_2O_3, the original structure is retained, and in the cases of BaO and CaO, the structure is most fine. The original sulphur content of the cast irons is also reduced in the similar order. (3) In the case of argon atmosphere, it may be deduced from the thermodynamic consideration that the Fe-C-Si alloys are deoxidized in the following processes. Si+2O+2MO (S)=M_2SiO_4, and Si+2O+MO (S)=MSiO_3. (4) In the case of CO atmosphere, it may be considered that the structural changes between flake graphite and fine eutectic graphite structure of Fe-C and Fe-C-Si alloys are due to the changes of sulphur contents of the alloys. In the case of argon atmosphere, it may be considered that the structural changes of Fe-C-Si alloys are due to the deoxidation and desulphurization of the alloys.
- 東北大学の論文
著者
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Homma Masao
The Research Instite For Iron Steel And Other Metals
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Ohno Reiichi
The Research Instite For Iron Steel And Other Metals
関連論文
- Studies of the Manufacturing and Mechanical Properties of Vanadium High Grade Cast Iron
- Studies on the Wear Resisting Properties of the Spheroidal Graphite Cast Steel
- Malleable Cast Iron Specially Controlled on the Mutual Relations among Silicon, Manganese and Sulfur
- Some Investigations on the Cerium-treated Cast Iron
- On Various Properties of Nodular Graphite Cast Steel
- Study of Magnesium Treated Nodular Cast Iron by Reducing in the Electric-Arc Furnace
- Behavior of Sulfur in Cast Iron
- A Rate Equation for the Solution of Solid Iron in Liquid Copper
- Thermodynamic Considerations on Desulfurization of Cast Iron in Vacuum Melting
- Kinetic Study of Desulfurization and Deoxidation of Ferroalloys in Vacuum Melting
- Refining Method for Refining Cast Iron by the Electrolysis of Slag
- Research on the Structural Changes of Cast Iron by Contact Meltlng with Various Oxides
- Study On Wear Resisting Properties of Deoxidized High Grade Cast Iron. I : On Wear of Flake Graphite Cast Iron
- Studies of the Quality, Relaxation and Wear Resisting Properties of Vanadium High Grade Cast Iron
- Rates of Dissolution of Rotating Cobalt Cylinders in Liquid Copper and Cu-Co Alloys
- Wear Properties of Various Cast Irons Having Different Graphite Shapes
- Research on the Relation between Cast Iron and Oxygen. I : The Mechanism of the Formation of White Cast Iron under the Influence of Oxygen
- Abnormal Steel and its Structure
- Experimental Research on Super-Heating of Molten Cast Iron
- Research on the Relation between Cast Iron and Oxygen. II : On the Mechanism of the Formation of White Cast Iron in the Presence of Carbide Forming Elements
- Deoxidation of Fe-C and Fe-Si Alloys under Reduced Pressures
- Behaviours of the Precipitates of 17-4 PH Stainless Steel by the Arc Welding Heat
- Welding by Single Bead Test, and Rapid Heating and Cooling Structures of 13% Chromium Stainless Steel
- On the Behaviour of Graphite in Graphitic Cast Steel
- Research on the High Silicon Malleable Cast Iron by the Addition of Bismuth
- Welding of Cast Iron and Nodular Graphite Cast Steel. II : Arc-Welding of Nodular Graphite Cast Steel
- Welding of Cast Iron and Nodular Graphite Cast Steel. I : Properties of the Heat Affected Zone of Cast Iron
- Changes in the Graphite Structures of Flake Graphite and Spheroidal Graphite Cast Irons by the Fusion in a Short Time
- Considerations on Super-Heating of Molten Cast Iron
- Rate of Desulfurization of Ferroalloys in Vacuum Melting
- Effect of Simultaneous Addition of Magnesium and Rare Earth Alloy on the Manufacturing of Nodular Graphite Cast Iron