Molybdenum threading

Thread Compound, Antiseize, Molybdenum Disulfide Petrolatum... 

There are three main types of application for which molybdenum disulphide pastes and concentrated dispersions are used. They are used as anti-seize compounds for threaded fittings, pipes, flanges, and so on. They are also used to assist assembly, and to a lesser extent running-in, of many different types of mechanical euqipment. Finally, they are used in high-load metalforming processes. 

Several publications have described the use of molybdenum disulphide pastes for the lubrication of screw threads. This is an application in which the paste assists assembly and subsequently acts as an anti-seize. The critical factors in screw or bolt assembly are the friction between male and female thread and between bolt-head and workpiece, and their effect on the relationship between assembly torque and bolt tension (clamping force). The stiffness and integrity of a bolted assembly are determined by the bolt tensions, but since it is impracticable to measure bolt tension directly, the required bolt tension is controlled by the torque applied to the bolt or nut. However, the relationship between assembly torque and bolt tension is determined by head friction and thread friction. If the friction is reduced, the required bolt tension will be obtained at a lower assembly torque. 

Screw threads, rivets, or fasteners in air to 150°C Molybdenum disulphide paste anti-seize... 

If past experience is worth anything, the knowledge gained in the successful design, installation and operation of the Thor missile should be taken into consideration. The lubricants and thread compounds used in this program were Kel-F, Halocarbon, Fluorolube, Oxylube, Teflon and Molybdenum Disulfide [8, 23,24,25]. 

Among other colloidal metals tungsten deserves mention because of its importance in electric light bulbs. A method for making the material for these filaments has been worked out by Kuzel. The colloidal metal is obtained by continued grinding and by alternate treatments with acid and alkafi. By this process the particles become so small that the metal finally forms a hydrosol. On precipitation of the sol a plastic mass is obtained that is next pressed out through fine holes, by which process threads are formed. The lamps are economical and last longer than the old varieties. Molybdenum, silicon, titanium, and thorium may be prepared in a colloidal state by the same method. 

Figure 6.11.1 Experimental cell for studying dissolution of molybdenum pentachloride in alkali chloride based melts. I - Solvent melt, 2 - silica optical cell, 3 - silica capillary tube for taking melt sample, 4 - side-arm for connecting the cell to an argon-vacuum line, 5 - vacuum rubber stopper, 6 - silica tube with a bell-jar attached, 7 - solid molybdenum pentachloride and 8 - silica thread wad...

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