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Steel MakingShort Method Of TreatmentIn the new method, the packed pots are run into the case-har... The Effect Of Tempering On Water-quenched Gages The following information has been supplied by Automatic and ... A Chromium-cobalt Steel The Latrobe Steel Company make a high-speed steel without tun... Surface Carburizing Carburizing, commonly called case-hardening, is the art of pr... Silicon SILICON is a very widespread element (symbol Si), being an es... Heat Treatment Of Gear Blanks This section is based on a paper read before the American Gea... Double Annealing Water annealing consists in heating the piece, allowing it to... Pyrometers For Molten Metal Pyrometers for molten metal are connected to portable thermoc... Quenching It is considered good practice to quench alloy steels from th... The Packing Department In Fig. 56 is shown the packing pots where the work is packe... For Milling Cutters And Formed Tools FORGING.--Forge as before.--ANNEALING.--Place the steel in a ... Correction By Zero Adjustment Many pyrometers are supplied with a zero adjuster, by means ... Furnace Data In order to give definite information concerning furnaces, fu... Liberty Motor Connecting Rods The requirements for materials for the Liberty motor connecti... Quenching The Work In some operations case-hardened work is quenched from the bo... Heat-treating Department The heat-treating department occupies an L-shaped building. ... Annealing Work With the exception of several of the higher types of alloy s... Heat Treatment Of Punches And Dies Shears Taps Etc HEATING.--The degree to which tools of the above classes shou... Pyrometry And Pyrometers A knowledge of the fundamental principles of pyrometry, or th... Annealing Method Forgings which are too hard to machine are put in pots with ... |
MolybdenumCategory: ALLOYS AND THEIR EFFECT UPON STEEL Molybdenum steels have been made commercially for twenty-five years, but they have not been widely exploited until since the war. Very large resources of molybdenum have been developed in America, and the mining companies who are equipped to produce the metal are very active in advertising the advantages of molybdenum steels. It was early found that 1 part molybdenum was the equivalent of from 2 to 2-1/2 parts of tungsten in tool steels, and magnet steels. It fell into disrepute as an alloy for high-speed tool steel, however, because it was found that the molybdenum was driven out of the surface of the tool during forging and heat treating. Within the last few years it has been found that the presence of less than 1 per cent of molybdenum greatly enhances certain properties of heat-treated carbon and alloy steels used for automobiles and high-grade machinery. In general, molybdenum when added to an alloy steel, increases the figure for reduction of area, which is considered a good measure of toughness. Molybdenum steels are also relatively insensible to variations in heat treatment; that is to say, a chromium-nickel-molybdenum steel after quenching in oil from 1,450 deg.F. may be drawn at any temperature between 900 and 1,100 deg.F. with substantially the same result (static tensile properties and hardness). Next: Silicon Previous: Tungsten
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