AUTOBIOGRAPHY OF JOHN FRITZ
The chenflcal analysis of the steel, if I remember correctly, was very good. There had been some blowholes in tiie ingot, as there are in too many of them. To my mind the trouble was almost entirely to be attributed to two causes. First, the ingot had been charged in a hot furnace and
. — Section op Steel Shaft suowing liLPKUiqccTiONs in Forging.
heated up too quickly, pulUng the center apart, thereby causing the cracks. Second, as the ingot was forged under a Ught hammer, in aU probabiUty using steam on top of the piston (which gives a quick stroke and does not give the metal time to flow or to reach the center, thereby elongating