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Steel MakingHeat-treating Equipment And Methods For Mass ProductionThe heat-treating department of the Brown-Lipe-Chapin Company... The Quenching Tank The quenching tank is an important feature of apparatus in c... Temperature Recording And Regulation Each furnace is equipped with pyrometers, but the reading an... Crucible Steel Crucible steel is still made by melting material in a clay or... Preparing Parts For Local Case-hardening At the works of the Dayton Engineering Laboratories Company, ... Annealing To Relieve Internal Stresses Work quenched from a high temperature and not afterward tempe... Effect Of A Small Amount Of Copper In Medium-carbon Steel This shows the result of tests by C. R. Hayward and A. B. Joh... A Satisfactory Luting Mixture A mixture of fireclay and sand will be found very satisfactor... Refining The Grain This is remedied by reheating the piece to a temperature slig... Drop Forging Dies The kind of steel used in the die of course influences the he... Introduction Of Carbon The matter to which these notes are primarily directed is the... Machineability Reheating for machine ability was done at 100 deg. less than ... Process Of Carburizing Carburizing imparts a shell of high-carbon content to a low-... Hardening High-speed Steels We will now take up the matter of hardening high-speed steels... Ebbw Vale And The Bessemer Process After his British Association address in August 1856, Besseme... Hardening Steel is hardened by quenching from above the upper critical.... Carbon Steels For Different Tools All users of tool steels should carefully study the different... High-carbon Machinery Steel The carbon content of this steel is above 30 points and is ha... The Forging Of Steel So much depends upon the forging of steel that this operation... Chrome-nickel Steel Forging heat of chrome-nickel steel depends very largely on ... |
Temperature Recording And RegulationCategory: HEAT TREATMENT OF STEEL Each furnace is equipped with pyrometers, but the reading and recording of all temperatures are in the hands of one man, who occupies a room with an opening into the end of the hardening department. The opening is about 15 ft. above the floor level. On each side of it, easily legible from all of the furnaces, is a board with the numbers of the various furnaces, as shown in Figs. 59 and 60. Opposite each furnace number is a series of hooks whereon are hung metal numbers representing the pyrometer readings of the temperature in that particular furnace. Within the room, as shown in Fig. 60, the indicating instrument is to the right, and to the left is a switchboard to connect it with the thermo-couples in the various furnaces. The boards shown to the right and the left swing into the room, which enables the attendant easily to change the numbers to conform to the pyrometer readings. Readings of the temperatures of the carburizing furnaces are taken and tabulated every ten minutes. These, numbered 1 to 10, are shown on the board to the right in Fig. 59. The card shown in Fig. 61 gives such a record. These records are filed away for possible future reference. The temperatures of the reheating furnaces, numbered from 1 to 26 and shown on the board to the left in Fig. 59, are taken every 5 min. Each furnace has a large metal sign on which is marked the temperature at which the furnace regulator is required to keep his heat. As soon as any variation from this is posted on the board outside the pyrometer room, the attendant sees it and adjusts the burners to compensate. DIES FOR GLEASON TEMPERING MACHINES.--In Fig. 62 is shown a set of dies for the Gleason tempering machine. These accurately made dies fit and hold the gear true during quenching, thus preventing distortion. Next: Hardening Operation Previous: Testing And Inspection Of Heat Treatment
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