鉄系焼結体の焼結炉内調整雰囲気ガス

概要

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Since iron-graphite compacts are usually sintered in the furnace of atmosphere such as H_2 gas or dissociated ammonia gas, the mechanical properties of sintered products are markedly deteriorated through decarburization of the compacts. Authors investigated, in this report, carbon potential of RX gas at sintering temperatures, carburizing and decarburizing reaction and bending strength of the iron, iron-graphite compacts sintered in the RX gas and hydrogen gas. Results of this experiment are as follows. 1. Carbon potentials of RX gas in sintering furnace can be pre-estimated by extending the theory applicable to the gas carburizing of steel. 2. When iron compacts are sintered in RX gas, the equilibrium carbon content can not be obtained and considerable differences in carbon content exist between surface and core structure of sintered products. 3. When iron-graphite compacts are sintered in RX gas, uniform carbon contents in both surface and core structure of sintered parts can be produced by only controlling the dew point of RX gas. The mechanical strength obtained in such a process is superior to those of parts sintered in hydrogen.
社団法人日本鉄鋼協会の論文
1964-12-01