| The first requisite of style is choice of words, and this comes under the head of Diction, the property of style which has reference to the words and phrases used in speaking and writing. The secret of literary skill from any standpoint consist... Read more of DICTION at Speaking Writing.com |  Informational.caPrivacy |
Steel MakingCutting-off Steel From BarTo cut a piece from an annealed bar, cut off with a hack saw,... Uses Of The Various Tempers Of Carbon Tool Steel DIE TEMPER.--No. 3: All kinds of dies for deep stamping, pres... Bessemer Process The bessemer process consists of charging molten pig iron int... Phosphorus Phosphorus is one of the impurities in steel, and it has been... Temperature Recording And Regulation Each furnace is equipped with pyrometers, but the reading an... Hardness Testing The word hardness is used to express various properties of me... Surface Carburizing Carburizing, commonly called case-hardening, is the art of pr... Heat Treatment Of Punches And Dies Shears Taps Etc HEATING.--The degree to which tools of the above classes shou... Tool Or Crucible Steel Crucible steel can be annealed either in muffled furnace or b... Nickel Nickel may be considered as the toughest among the non-rare a... The Effect Of Tempering On Water-quenched Gages The following information has been supplied by Automatic and ... Quenching Tool Steel To secure proper hardness, the cooling of quenching of steel ... Steel Can Be Worked Cold As noted above, steel can be worked cold, as in the case of ... Annealing Of High-speed Steel For annealing high-speed steel, some makers recommend using g... Annealing Alloy Steel The term alloy steel, from the steel maker's point of view, r... Placing Of Pyrometers When installing a pyrometer, care should be taken that it re... Hardening High-speed Steel In forging use coke for fuel in the forge. Heat steel slowly ... Correction By Zero Adjustment Many pyrometers are supplied with a zero adjuster, by means ... Phosphorus PHOSPHORUS is an element (symbol P) which enters the metal fr... Annealing There is no mystery or secret about the proper annealing of d... |
Judging The Heat Of SteelCategory: HEAT TREATMENT OF STEEL While the use of a pyrometer is of course the only way to have accurate knowledge as to the heat being used in either forging or hardening steels, a color chart will be of considerable assistance if carefully studied. These have been prepared by several of the steel companies as a guide, but it must be remembered that the colors and temperatures given are only approximate, and can be nothing else. The Magnet Test.--The critical point can also be determined by an ordinary horse-shoe magnet. Touch the steel with a magnet during the heating and when it reaches the temperature at which steel fails to attract the magnet, or in other words, loses its magnetism, the critical point has been reached. The work is heated up slowly in the furnace and the magnet applied from time to time. The steel being heated will attract the magnet until the heat reaches the critical point. The magnet is applied frequently and when the magnet is no longer attracted, the piece is at the lowest temperature at which it can be hardened properly. Quenching slightly above this point will give a tool of satisfactory hardness. The method applies only to carbon steels and will not work for modern high-speed steels. Next: Heat Treatment Of Gear Blanks Previous: Hardening
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