| 单词 | carburize |
| 例句 | Under primitive methods of making wrought-iron it is quite possible to carburize the iron sufficiently to make steel direct from ore. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z The hardness of the fleam metal indicated that it was carburized sufficiently to be made of steel. Bloodletting Instruments in the National Museum of History and Technology A novel carburizing furnace that is being used by a number of people, is built after the plan of a fireless cooker. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel This gives the heat a chance to thoroughly permeate the pot, and the carburizing material a chance to shrink without allowing carburized pieces to touch and cause soft spots. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel It must be packed so that each piece is separate from the others and does not touch the box, with a sufficient amount of carburizing material surrounding each. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel The most important thing in carburizing is the human element. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel The carburization then goes on for several hours before the furnace is cooled below the effective carburizing range, securing an ideal diffusion of carbon between the case and the core of the steel being carburized. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel The hard surface or "case" varies in thickness according to the size of the piece, the materials used and the length of time which the piece remains at the carburizing temperature. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel In fact, this is a good scheme to use for the majority of carburizing work of small and moderate size. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel Formerly, the work was carburized at about 1,700°F. for 9 hr. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel Affinity of Nickel Steel for Carbon.—The carbon- and nickel-steel gears are carburized separately owing to the difference in time necessary for their carburization. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel The carburized sleeves are heated in an automatic furnace, which takes them cold at the back and feeds them through to the front, by which time they are at the correct temperature. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel T. G. Selleck gives a very useful table of temperatures and the relative carbon contents of the case of steels carburized between 4 and 6 hrs. using a good charcoal carburizer. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel The transmission gears will be of high-carbon steel and the differential of low-carbon steel, carburized. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel In some cases of cyanide carburizing, the piece is heated in cyanide to the desired temperature and then quenched. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel Under such conditions, carbon is absorbed by the steel surfaces, and a carburized case is produced capable of responding to ordinary hardening and tempering operations, the core meanwhile retaining its original softness and toughness. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel The strength and ability to withstand hard knocks depend to a very considerable degree on the thoroughness with which the carburizing process is conducted. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel They are generally nothing more than mixtures of carbonaceous and cyanogen compounds possessing the well-known carburizing properties of those substances. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel Should it be required to ascertain the amount of carbon in a sample at varying depths below the skin this can be done by turning off a small amount after carburizing and analyzing the turnings. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel Generally maintaining the temperature at 1,650 to 1,700° F. for 7 hr. will produce a carburized zone 1/32 in. deep. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel As these test pieces are of exactly the same cross-section as the gears themselves, the carburizing action is similar. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel There are two distinct types of gears, both types having their champions, namely, carburized and heat-treated. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel In addition to the carburizing materials given, a mixture of 40 per cent of barium carbonate and 60 per cent charcoal gives much faster penetration than charcoal, bone or leather. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel In fact it is very difficult to distinguish between these two hardening agents when examining a carburized steel under the microscope. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel One of the advantages of hardening by carburizing is the fact that you can arrange to leave part of the work soft and thus retain the toughness and strength of the original material. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel Material is on the market with which one side of the steel can be treated; or copper-plating one side of it will answer the same purpose and prevent that side becoming carburized. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel Water inlet and outlet pipes are shown and also a drain plug that enables the tank to be emptied when it is desired to clean out the spent carburizing material from the bottom. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel For instance, date of treatment, furnace, carburizing material, position of the pot in the furnace, position of gear in pot, temperature of furnace and duration of treatment are all tabulated and filed for reference. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel Nickel steel carburizes more slowly than common steel, the nickel seeming to have the effect of slowing down the rate of penetration. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel It has been found that the rate of carbon penetration increases with the gas pressure around the articles being carburized, and it is therefore necessary to be careful in sealing up the boxes after packing. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel After marking, all holes and parts which are to remain uncarburized are plugged or luted with a mixture of kaolin and Mellville gravel clay, and the gear is packed in the carburizing material. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel Practically all printed information on the subject is to the effect that nickel steel takes longer to carburize than plain carbon steel. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel Bohnite, a commercial carburizing compound is used exclusively at this plant. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel Mixed with raw bone it will carburize more rapidly, and still more so if mixed with burnt bone. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel The advantages in the hardening start with the carburizing operation, as a steel of uniform and fine grain size will carburize more uniformly, producing a more even hardness and less chances for soft spots. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel Readings of the temperatures of the carburizing furnaces are taken and tabulated every ten minutes. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel Broadly speaking, the economy of a carburizing compound depends on its lightness. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel It is used as a valve to plug the bottom of the pot to prevent the carburizing compound from dropping through when removing the carburized gears to the quenching bath. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel The old way of case-hardening was to dump the contents of the box at the end of the carburizing heat. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel The choice of a carburizing furnace depends greatly on the facilities available in the locality where the shop is situated and the nature and quantity of the work to be done. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel The selection of suitable boxes for carburizing is worthy of a little consideration, and there can be no doubt that in certain cases results are spoiled and considerable expense caused by using unsuitable containers. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel |
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