日本金属学会誌

J. Japan Inst. Metals, Vol. 39, No. 4 (1975),
pp. 345-351

Surface Layer Formed on Iron and Steel Impregnated Simultaneously with Carbon and Silicon

Kazuo Hosokawa1

1Ishikawa Technical College, Ishikawa Prefecture

Abstract:

With the aim of obtaining a siliconized layer without any porosity, a silico-carburizing method using a hot bath consisting of Si, carbonate (K2CO3, Na2CO3, Li2CO3, SrCO3 or BaCO3) and neutral salts (KCl, NaCl) has been studied. The results obtained are summarized as follows.
(1) In a hot bath consisting of neutral salts and Si, a thin siliconized layer is formed on the surfaces of iron and steel. In the case of SiC and neutral salts, both siliconizing and carburizing are observed.
(2) In a hot bath consisting of Si, carbonate and neutral salts, siliconized layers are formed on the surfaces of iron and steel and carburized layers beneath them. The siliconized layers are somewhat porous. Impregnation with carbon takes place according to the following reaction:


(Received 1974/06/3)

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