Transactions of the Society of Automotive Engineers Volume 15, No. 1 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1921 Excerpt: ... the entire heattreatmftit, rather than to attempt any experiments. The Midvale Steel & Ordnance Corporation issued a booklet containing much information about its series of alloy and tool steels, which is of general value. If the parts are to be brazed and heat-treated, a spelter should be selected such that the quenching temperature of the steel employed will be at least 125 deg. fahr., that at which the brazing spelter melts, and, if possible, this difference should be greater to avoid danger of destroying the brazed joint during heat-treatment. Heat-treatment If the parts are to be brazed first and heat-treated in a separate and subsequent operation, the two operations can be handled in the usual manner, except that it may be found necessary to take special precautions to avoid warping during heat-treatment. It would seem advisable, however, to rivet, spot-weld or otherwise fasten the parts together before brazing, so as to prevent trouble from slippage of the joints during the subsequent heating. This practice of fastening parts together before brazing is in use in many shops at present and has been found to facilitate rather than to hold up production in most cases. Boulton" gives a detailed discussion of brazing. 'Metallography and Heat-treatment of Iron and Steel, Sauveur. Steel and Its Heat-treatment, Bullens. The operations of dip brazing and heat-treating can be combined by selecting steels and brazing spelters which have the necessary quenching and melting temperatures respectively. In this method the brazing spelter should be maintained sufficiently above the specified quenching temperature of the steel to insure quenching at the proper point. If possible, a brazing spelter should be selected which has a melting point sufficiently abov...