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To all whom it may concern:
Be it known that I, HILAIRE ANDRE LEV ALLOIS, of Paris, France, have invented a new and useful Improvement in the Manufacture of Steel; and I do hereby declare the follow ing to be a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same. This invention relates to a compound pre pared from soft iron, tungsten, and nickel, which forms a cast-steel of superior quality, which is not liable to rust, and the cost of which does not exceed that of ordinary cast- steel of good quality. The proportions in which I mix the ingredi ents of my steel compound together vary accord ing to the desired quality. For the first quality I use soft iron, ninety- three parts; tungsten, six and one-half parts; nickel, one-half part. For the second quality I use soft iron, nine ty-fiveparts; tungsten, fourandoue-halfparts; nickel, one-half part. For the third quality I use soft iron, ninety seven parts; tungsten, two and one-half parts; nickel,one-half part. The furnaces and crucibles employed in pro ducing my steel compound are the same as those ordinarily employed in the manufacture of cast- steel. The tungsten and nickel are mixed to gether and inclosed, with a suitable flux in a soft sheet-iron tube, which is placed in the center of the charge, said charge being sprinkled over with a quantity of the flux, varying in propor tion to the quantity of the metal treated be tween one-half part and two parts of flux to one hundred parts of metal. As soon as the mass has become liquid it is run off in the usual |
way into a sand or metal mold, the latter be
ing lined with a mixture of clay and percar- buret of iron. Before and during the process of running off the fused metal a vacuum is produced in the mold by covering the bot- tom of the funnel with a, diaphragm of parch ment, which is destroyed by the contact of the fused metal. When the alloy is run into a metal mold the ingot is removed as soon as it be comes soliditied. It is then annealed in a closed vessel, and allowed to cool gradually. The steel produced as above described may be hammered in the same way as ordinary steel. The flux which I use, by preference in carry ing out my invention is composed of the fol lowing ingredients: Boric acid, or biborate of soda, thirty-six parts; calcined silex, thirty two parts; carbonate of time, thirty-two parts. These ingredients are pulverized in a mor tar, and when thoroughly mixed together the compound is placed in small quantities in a crucible heated to a white heat, and, when liquefied, it (the compound) is run off on a flitted cast-iron plate; and, finally, the flux thus obtained is crushed into small particles before it is used. What I claim as new, and desire to secure by Letters Patent, is- A compound for steel, made of the ingredi ents herein specified, and mixed together sub stantially in the manner and about in the pro portion set forth. H. A. LEVALLOIS. Witnesses:H. BONNEVILLE, |