鋼の乾濕水素に依る脱炭
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概要
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The author carried out the decarburization of Swedish steel by dry and wet hydrogen current at high temperatures and observed decarburization from their microscopic structures. Steels were decarburized by dry and wet hydrogen current (dry hydrogen and hydrogen containing water vapor) at temperatures above and below the A_3-transition point of iron-carbon system equilibrium diagram and studied the effect of the presence of water vapor in hydrogen upon decarburization. The decarburized structures obtained by using wet hydrogen (hydrogen containing water vapor) at temperatures below the A_3-transition point developed a columnar ferrite band with a very clear boundary, while the structures obtained by decarburizing with dry hydrogen did not develope such ferrite band. The author considered the reason for the formation of such ferrite band and its mechanism by applying the iron-carbon system diagram and made clear the relation between the appearance or not of ferrite band on decarburizing with dry or wet hydrogen.
- 1941-04-25