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Steel MakingSuggestions For Handling High-speed SteelsThe following suggestions for handling high-speed steels are ... Furnace Data In order to give definite information concerning furnaces, fu... Temperature For Annealing Theoretically, annealing should be accomplished at a tempera... Sulphur Sulphur is another impurity and high sulphur is even a greate... Quenching Tool Steel To secure proper hardness, the cooling of quenching of steel ... Carburizing Low-carbon Sleeves Low-carbon sleeves are carburized and pushed on malleable-ir... The Quenching Tank The quenching tank is an important feature of apparatus in c... Flange Shields For Furnaces Such portable flame shields as the one illustrated in Fig. 1... Annealing To Relieve Internal Stresses Work quenched from a high temperature and not afterward tempe... Annealing ANNEALING can be done by heating to temperatures ranging from... Ebbw Vale And The Bessemer Process After his British Association address in August 1856, Besseme... Silicon Silicon prevents, to a large extent, defects such as gas bubb... Judging The Heat Of Steel While the use of a pyrometer is of course the only way to hav... Heat Treatment Of Lathe Planer And Similar Tools FIRE.--For these tools a good fire is one made of hard foundr... Carbon In Tool Steel Carbon tool steel, or tool steel as it is commonly called, us... Complete Calibration Of Pyrometers For the complete calibration of a thermo-couple of unknown e... Surface Carburizing Carburizing, commonly called case-hardening, is the art of pr... Piston Pin The piston pin on an aviation engine must possess maximum res... Composition Of Transmission-gear Steel If the nickel content of this steel is eliminated, and the pe... Shrinking And Enlarging Work Steel can be shrunk or enlarged by proper heating and cooling... |
Heating Of Manganese SteelCategory: FURNACES Another form of heat-treating furnace is that which is used for the heating of manganese and other alloy steels, which after having been brought to the proper heat are drawn from the furnace into an immediate quenching tank. With manganese steel in particular, the parts are so fragile and easily damaged while hot that it is frequent practice to have a sloping platform immediately in front of the furnace door down which the castings may slide into a tank below the floor level. Such a furnace with a quenching tank in front of its door is shown in Fig. 108. These tanks are covered with plates while charging the furnace and the cold castings are placed in a moderately cool furnace. Since some of these steels must not be charged into a furnace where the heat is extreme but should be brought up to their final heat gradually, there is little discomfort during the charging process. When quenching, however, from a temperature of 1,800 deg. to 1,900 deg., it is extremely unpleasant in front of the doors. The swinging shield is here adapted to give protection for this work. As will be noted it is hung a sufficient distance in front of the doors, that it may not interfere with the castings as they come from the furnace, and slide down into the tank. To facilitate the work, and avoid the necessity of working with the bars outside the edges of the shield, the slot-like hole is cut in the center of the shield, and through this the bars or rakes for dragging out the castings are easily inserted and manipulated. The advantage of such a swinging shield is that it may be readily moved from side to side, or forward and back as occasion requires. Next: Furnace Data Previous: Flange Shields For Furnaces
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