| Effect: This trick is a math trick. You make alot of piles, have someone choose 3 of them. Have them mix around the piles while you're not looking, then flip over the top 2 cards of 2 of the piles and then tell them the top card of the 3rd deck. C... Read more of Math is Beautiful at Card Trick.ca |  InformationalPrivacy |
Steel MakingTempering Colors On Carbon SteelsOpinions differ as to the temperature which is indicated by t... The Quenching Tank The quenching tank is an important feature of apparatus in c... Hardening Carbon Steel For Tools For years the toolmaker had full sway in regard to make of st... Testing And Inspection Of Heat Treatment The hard parts of the gear must be so hard that a new mill f... The Effect Of Tempering On Water-quenched Gages The following information has been supplied by Automatic and ... Vanadium Vanadium has a very marked effect upon alloy steels rich in c... Sulphur SULPHUR is another element (symbol S) which is always found i... Preparing Parts For Local Case-hardening At the works of the Dayton Engineering Laboratories Company, ... Manganese MANGANESE is a metal much like iron. Its chemical symbol is M... Carbon Steels For Different Tools All users of tool steels should carefully study the different... Rate Of Cooling At the option of the manufacturer, the above treatment of gea... Oil-hardening Steel Heat slowly and uniformly to 1,450 deg.F. and forge thorough... Nickel Nickel may be considered as the toughest among the non-rare a... Heat Treatment Of Axles Parts of this general type should be heat-treated to show the... Phosphorus PHOSPHORUS is an element (symbol P) which enters the metal fr... Annealing Method Forgings which are too hard to machine are put in pots with ... A Chromium-cobalt Steel The Latrobe Steel Company make a high-speed steel without tun... Chromium Chromium when alloyed with steel, has the characteristic func... High-carbon Machinery Steel The carbon content of this steel is above 30 points and is ha... Annealing In Bone Steel and cast iron may both be annealed in granulated bone. ... |
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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