Mixed Metals: Or, Metallic AlloysMacmillan and Company, 1901 - 384 páginas |
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Términos y frases comunes
added alloys containing aluminium amalgam annealing antimony arsenic atomic bismuth bodies brass brittle bronze cadmium carbonic acid carbonic oxide cast cast-iron cent copper cent of copper cent of zinc charcoal chemical chloride clay colour combination composition compounds constituents cooling copper copper and zinc crucible crystalline crystals decomposed dipping dissolved ductile employed eutectic flux fracture furnace fused fusible fusible alloy gold granular grey hard hardened high temperature hydrochloric acid hydrogen impurities increases ingot lead lime liquid lustre malleable manganese melting point mercury metal mixed mixture molten mould nickel nitric acid non-metals obtained ordinary temperatures oxidising oxygen phosphorus platinum polish portion potassium powder present produced properties proportions pure readily red heat reduced rolled salt sand silicate silicon slag small quantity sodium soft solder specific gravity steel strongly heated substance sulphide sulphuric acid surface tenacity tensile strength termed Tombac unites volatilises wire yellow
Pasajes populares
Página 268 - Cleanse well the parts to be joined free from dirt and grease. Then place the parts to be soldered in a strong solution of sulphate of copper, and place in the bath a rod of soft iron touching the parts to be joined. After a while a copper-like surface will be seen on the metal.
Página 46 - Matthiessen regards it as probable that the condition of an alloy of two metals in the liquid state may be either that of — (1) a solution of one metal in another; (2) chemical combination ; (3) mechanical mixture ; or (4) a solution or mixture of two or all of the above ; and that similar differences may obtain as to its condition in the solid state.
Página 222 - The figures of specific gravity show a fair agreement among the several authorities in the alloys containing more than 35 per cent. of tin, except those given by Mallet, which are in general very much lower than those by all the other authorities. In the alloys containing less than 35 per cent. of tin there is a wide variation among all the different .authorities, Mallet's figures, however, being generally lower than the others. Several of the figures of specific gravity have been selected from...
Página 271 - This diagram (Fig. 3) shows the method of manufacture. Take thin sheets of almost any of the alloys I have mentioned, and solder1 them together layer upon layer, care being taken that the metals which will present diversity of colour come together. Then drill conical holes of varying depth, A, in the mass, or devices in trench-like cuts of V section, B, and hammer the mass until the holes disappear ; the holes will thus be replaced by banded circles and the trenches by banded lines. A Japanese artificer...
Página 222 - broke" in this column indicates the fact that the alloy opposite which it occurs broke under the indenting tool, showing that the relative hardness could not be measured, but was considerably greater than that of cast iron.
Página 128 - Mallet under the heads of order of ductility, order of malleability, hardness, and order of fusibility, the maximum of each of these properties is represented by 1. " The figures given by Mallet for tenacity are confirmed by experiments of the author, with a few very marked exceptions. These exceptions are chiefly the figures for copper, for zinc, and for CuZn.2 (32-85 copper, 67-15 of zinc).
Página 304 - French legislature sanctions the employment of 18 per cent, of lead with 82 of tin as quite harmless in vessels for wine and vinegar. The finest pewter, frequently called "tin and temper," consists mostly of tin, with a very little copper, which makes it hard and somewhat sonorous, but the pewter becomes brown-colored when the copper is in excess.
Página 143 - ... contained in it, rendering it injurious to health. The directions for preparing this alloy vary greatly. The products of some Paris factories show the following composition: I II III Copper 90 80.5 86.21 Zinc 10 14.5 31.52 Tin 0.48 Iron 0.24 A special receipt for oreide is the following: IV.
Página 394 - Newcastle-upon-Tyne, three castles, with the addition of a leopard's head ; York, a cross and five lions, also with the addition of a leopard's head. There are two assay offices in Scotland, where the standard is indicated by the thistle. The distinctive marks are : — Edinburgh, a castle ; Glasgow, a tree growing out of a mount, with a bell pendant on the sinister branch, and a bird on the top branch, over the trunk of a tree a salmon in fesse, in its mouth an annulet. In Ireland the assaying and...
Página 328 - These metals only alloy together in small proportions, and do not form combinations of much use in the Arts. In some experiments made by Guettier at Angers in 1848, lead to the extent of 2 to 3 per cent was thoroughly mixed with molten cast-iron, but the lead was almost entirely oxidised or deposited at the bottom of the mould. The cast-iron thus treated was harder, and its grains were flatter and without lustre. As soon as lead is introduced into molten cast-iron a certain agitation appears at the...