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Steel MakingPlant For Forging Rifle BarrelsThe forging of rifle barrels in large quantities and heat-tre... Instructions For Working High-speed Steel Owing to the wide variations in the composition of high-speed... Tungsten Tungsten, as an alloy in steel, has been known and used for a... Protectors For Thermo-couples Thermo-couples must be protected from the danger of mechanica... Fatigue Tests It has been known for fifty years that a beam or rod would fa... Annealing Method Forgings which are too hard to machine are put in pots with ... Standard Analysis The selection of a standard analysis by the manufacturer is t... Nickel-chromium A combination of the characteristics of nickel and the charac... Mushet And Bessemer That Mushet was "used" by Ebbw Vale against Bessemer is, perh... Drop Forging Dies The kind of steel used in the die of course influences the he... Piston Pin The piston pin on an aviation engine must possess maximum res... Robert Mushet Robert (Forester) Mushet (1811-1891), born in the Forest of D... Testing And Inspection Of Heat Treatment The hard parts of the gear must be so hard that a new mill f... Cutting-off Steel From Bar To cut a piece from an annealed bar, cut off with a hack saw,... Highly Stressed Parts The highly stressed parts on the Liberty engine consisted of ... Molybdenum Molybdenum steels have been made commercially for twenty-five... Heat Treatment Of Axles Parts of this general type should be heat-treated to show the... Blending The Compound Essentially, this consists of the sturdy, power-driven separa... Annealing Work With the exception of several of the higher types of alloy s... Quality And Structure The quality of high-speed steel is dependent to a very great ... |
Tempering Round DiesCategory: HARDENING CARBON STEEL FOR TOOLS A number of circular dies of carbon tool steel for use in tool holders of turret lathes were required. No proper tempering oven was available, so the following method was adopted and proved quite successful. After the dies had been hardened dead hard in water, they were cleaned up bright. A pair of ordinary smiths' tongs was made with jaws of heavy material and to fit nicely all around the outside of the die, leaving a 3/32-in. space when the jaws were closed around the die. The dies being all ready, the tongs were heated red hot, and the dies were picked up and held by the tongs. This tempered them from the outside in, left the teeth the temper required and the outside slightly softer. The dies held up the work successfully and were better than when tempered in the same bath. Next: The Effect Of Tempering On Water-quenched Gages Previous: Shrinking And Enlarging Work
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