Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 473
necessary for getting the best results.Copper, brass, tool steel and all other metals that are deteriorated by high temperaturesmust be heated quickly and pressed together with sufficient force to push out all theburnt metal from the weld. On flash or upset welding of iron or steel, not more… … Figs. 4,508 to 4,516.—General hints on electric welding. Cast iron cannot be commerciallywelded, as it is high in carbon and silicon, and passes suddenly from a crystalline to afluid condition when brought up to the welding temperature. Iron or steel. It is -nec-essary to keep the temperature below…
Electrical engineering
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