Hardening, tempering, annealing and forging of steel; a treatise on the practical treatment and working of high and low grade steel .. . FIG. 128.—1,500-POUND FRICTION ROLL FORGING DROP WITHGEARLESS LIFTER. account of its quickly melting and running off the weld. M. , Paris, France, has devised a flux consisting of a boraxmixture in which is incorporated a fine wire netting to hold it 186 HARDENING, TEMPERING AND FORGING AND WELDING. 187 together. It is rolled out in thin sheets and divided into squareswhich are easily broken apart for use. Tests of steel specimenswelded i
Hardening, tempering, annealing and forging of steel; a treatise on the practical treatment and working of high and low grade steel .. . FIG. 128.—1,500-POUND FRICTION ROLL FORGING DROP WITHGEARLESS LIFTER. account of its quickly melting and running off the weld. M. , Paris, France, has devised a flux consisting of a boraxmixture in which is incorporated a fine wire netting to hold it 186 HARDENING, TEMPERING AND FORGING AND WELDING. 187 together. It is rolled out in thin sheets and divided into squareswhich are easily broken apart for use. Tests of steel specimenswelded in the French government works show a remarkablyhigh efficiency of the welds. This is due to the high protectivepower of the flux which prevents the formation of oxide on thesurface of the welds. Compound for Welding Steel.—The following compositionhas in a number of cases proved superior to borax for weldingsteel: Mix coarsely powdered borax with a thin paste of prussi-ate blue; then let it dry. Fluxes for Soldering and Welding. For iron or steel, borax or sal-ammoniac; tinned iron, rosin orchloride of zinc; copper and brass, sal-ammoniac or chloride zinc;zinc, chloride of zinc; lead, tallow or rosin; lead and tin pipes,rosin and sweet oil. Substiftite for Borax in Welding. Copperas, 2 ounces ; saltpeter, i ounce ; common salt, 6 ounces ;black oxide of manganese, i ounce; prussiate of potash, i ounce. All pulverized- and mi
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Keywords: ., bookcentury1900, bookdecade1900, bookidhardeningtem, bookyear1903
