. Transactions. y{Q ( mm.) to 3^^ in. with iron nitride. This can be scraped off easily. Fig. 19.—Washed metal treated in NHs 2U hr. at 750 C; edge decarburized TO FORM PEARLITE. EtCHED 10 SEC. WITH 4 PER CENT. NITRIC ACID. X 50. with a penknife and analyzed, and shows that the carbon content hasbeen reduced to 1 per cent., the remainder being Fe2N, by experiment was repeated several times. Always jthe white castiron came out of the furnace with a heavy lead-colored coat of iionnitride, while the washed metal came out bright. Too much emphasiscannot be laid upon this fact, sin
. Transactions. y{Q ( mm.) to 3^^ in. with iron nitride. This can be scraped off easily. Fig. 19.—Washed metal treated in NHs 2U hr. at 750 C; edge decarburized TO FORM PEARLITE. EtCHED 10 SEC. WITH 4 PER CENT. NITRIC ACID. X 50. with a penknife and analyzed, and shows that the carbon content hasbeen reduced to 1 per cent., the remainder being Fe2N, by experiment was repeated several times. Always jthe white castiron came out of the furnace with a heavy lead-colored coat of iionnitride, while the washed metal came out bright. Too much emphasiscannot be laid upon this fact, since it was the only case in this researchwhere there was a noticeable formation of iron nitride on a solid iron by hydrogen could be quantitatively converted to thenitride, but on solid pieces there was not another single case where therewas even the slightest evidence of nitride. The analysis throws nolight on the peculiar behavior of white cast iron unless the effect can beattributed to the sulfur or phosphorus. H. E. WHEELER 271 Carbon Manganese Silicon tJULKUR Phosp
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
