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allowed to cool amount of carbon angle of friction annealing blue temperature brittle broken burning burnt steel calculation carbide of iron carbon steel carburised case-hardening cause centre chart cleavage coarse cold crack critical point Dr Stead ductility etched fact ferrite flux Formula fracture furnace grossly crystalline heat treatment high temperature inch square inches long interesting iron and steel knowledge length low temperature Magnified material metal metallography metallurgy microscopic mild steel obtained Original bar outer zone overheated oxide oxygen pearlite perfect welding phosphorus photomicrographs piece of steel plate point of incipient polished practical examples practical smith prove quenching red heat reheated to 900 represents ring sand scientific training shown in fig slip bands smith or forger smiths and forgers smithy and forge soft steel specimen steam hammer steel containing strained strength of materials structure surface tensile tests Tons per sq tool steel wrought iron young smiths
Page ii - Varieties of Iron and Steel.— Application of Cast Iron.— History.— Production.— Iron Ores. —Composition.— The Blast Furnace.— Materials.— Reactions.— Grading Pig Iron. — Carbon, Silicon, Sulphur, Phosphorus, Manganese, Aluminium, Arsenic, Copper, and Titanium.— The...
Page ii - ... practical chemist." — British Medical Journal. •" Compiled with great care, and will supply a want."— Journal of Education.
Page ii - Illustrations. 7s. 6d. net. THE ART OF THE GOLDSMITH AND JEWELLER, A Manual on the Manipulation of Gold and the Manufacture of Personal Ornaments.
Page 1 - This is a matter to which I have given a good deal of time and thought; but lest any one should think I consider the final word spoken, I prefer to take as my subject "An Experiment in School Gardens.
Page ii - The Microscopic Analysis of Carbon Steels. — APPENDICES. — INDEX. " The subject is treated in a masterly manner . . . altogether the new edition should prove invaluable to metallurgists." — Mining World. " Of all the books which have dealt with this subject in its many aspects, surely this one remains supreme.
Page 126 - C. 3rd., that cast steel is made exceedingly brittle by burning and cooling in air. Reheating to 900° C. greatly improves the burnt steel but it is less ductile than the unburnt material. Reheating, and forging to smaller section and annealing at 900° C. more than completely restores the original strength and ductility, as was proved by two sets of carefully conducted trials.
Page 126 - ... steel with 0'4 per cent. carbon after burning has its ductility greatly reduced. On reheating the burnt steel to 900° C. its good properties are completely restored. On reheating and forging it is made more ductile than it was before burning, and but slightly lower in tenacity than the original steel after reheating to 900° C.
Page 90 - ... One other peculiarity in the rectangularly brittle material was that in every case the lines of weakness were at an angle of 45° to the direction in which the steel had been rolled ; and although fracture could be readily effected at these lines of weakness or cleavage, the steel could be bent over and hammered close without fracture when the bending stress was applied at an angle of 45° to these lines of weakness. Photograph No. 24 illustrates this. Another kind of brittleness having the character...
Page 108 - ... found to be common to each of the original pieces of metal. In perfect welding, there is no visible joint, for the line or plane of junction is occupied by crystals, portions of which belong to one piece of metal and portions of the same crystals to the other.