Conclusions
-
l.
The optimum concentration of hydrogen chloride in the process of sintering cermet iron amounts to 5–10%. An intensive blowing with hydrogen at the end of the sintering cycle averts the harmful effect of HCl on the rust-resisting properties of sintered compacts.
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2.
The effect produced by HCl additions becomes manifest only if the holding periods were longer than 10–15 min. The degree to which the properties may be improved is estimated at 25–40%.
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3.
The conditions of preliminary sintering produce a decisive effect on the properties of re-pressed and repeatedly sintered bodies. In utilizing the atmosphere of H2+10% HCl for preliminary sintering (1100–1200°C, 15–90 min) it becomes possible to obtain the properties of cast electric steel ∋, after re-pressing of the compacts to a density of 7.7–7.8 g/cm3 and sintering at 1200°C (4 hours).
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References
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Andriyevskiy, R.A., Panichkin, V.V. & Fedorchenko, I.M. Sintering of ceramet iron in hydrogen with additions of hydrogen chloride. Met Sci Heat Treat 3, 326–329 (1961). https://doi.org/10.1007/BF00810388
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DOI: https://doi.org/10.1007/BF00810388