Changes in the Graphite Structures of Flake Graphite and Spheroidal Graphite Cast Irons by the Fusion in a Short Time

スポンサーリンク

概要

• 論文の詳細を見る

• The research was made of the welding structures of flake graphite and spheroidal graphite cast irons to see the change of graphite structure at the fusion bead, and to prevent flake graphite from transforming into eutectic graphite, and to prevent spheroidal graphite from collapsing. All parts of a sample was subjected to heat-cycle in accordance with gas-welding but without adopting its welding procedure. The results are as follows : (1) In the flake graphite cast iron, the amount of eutectic graphite increases with the rise of maximum fusion temperature in air and in contact with non-reducing flux. However, in the case of reudcing flux eutectic graphite hardly increases. Especially, when the amount of FeSi in a reducing flux is increased, flake graphite similar to that in the original base metal is maintained. In the welding of cast iron, therefore, it is important to cover the fusion bead with a reducing and graphitizing flux during heat-cycle in order to prevent the formation of eutectic graphite having a tendency to reduce the mechanical properties. (2) In the welding of the spheroidal graphite cast iron, for the sake of maintaining this structure, it is not significant to cover the fusion bead with a spheroidizing flux during fusion period, but it is important to treat it with a spheroidizing flux just before it refrigerates after heating the sample in air.

• 東北大学の論文

著者

• Homma Masao

  The Research Instite For Iron Steel And Other Metals

• Ishida Tsuneo

  The Research Institute 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
• 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
• 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
• The Brazing Reaction of Iron Base Metal with Copper. I : On the Dissolution of Solid Iron into Molten Copper
• The Reaction of Solid Cobalt with Molten Copper. II : On the Migration of Molten Copper into Solid Cobalt and the Structure of Copper-Cobalt Interface
• The Reaction of Solid Cobalt with Molten Copper. I : The Dissolution of Solid Cobalt into Liquid Copper
• 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
• The Reaction of Solid Cobalt with Molten Copper (Report 1) : The Dissolution of Solid Cobalt into Liquid Copper
• Considerations on Super-Heating of Molten Cast Iron
• Rate of Desulfurization of Ferroalloys in Vacuum Melting
• The Reaction of Solid Iron with Molten Tin
• The Reaction of Solid Cobalt with Molten Copper (Report 2) : On the Migration of Molten Copper into Solid Cobalt and the Structure of Copper-Cobalt Interface
• The Brazing Reaction of Iron Base Metal with Copper. II : Dissolution Reaction of Iron Base Metal and Migration of Molten Copper into Iron
• Effect of Simultaneous Addition of Magnesium and Rare Earth Alloy on the Manufacturing of Nodular Graphite Cast Iron

もっと見る 閉じる

スポンサーリンク