 Palm Readings.org - Learn how to read palms, your future and your past. Visit Palm Readings.org |  InformationalPrivacy |
Steel MakingPreventing Cracks In HardeningThe blacksmith in the small shop, where equipment is usually ... Quenching The Work In some operations case-hardened work is quenched from the bo... Annealing Of High-speed Steel For annealing high-speed steel, some makers recommend using g... Lathe And Planer Tools FORGING.--Gently warm the steel to remove any chill, is parti... Nickel Nickel may be considered as the toughest among the non-rare a... The Theory Of Tempering Steel that has been hardened is generally harder and more br... The Penetration Of Carbon Carburized mild steel is used to a great extent in the manufa... Detrimental Elements Sulphur and phosphorus are two elements known to be detrimen... Standard Analysis The selection of a standard analysis by the manufacturer is t... Testing And Inspection Of Heat Treatment The hard parts of the gear must be so hard that a new mill f... Shrinking And Enlarging Work Steel can be shrunk or enlarged by proper heating and cooling... Tool Or Crucible Steel Crucible steel can be annealed either in muffled furnace or b... Silicon Silicon prevents, to a large extent, defects such as gas bubb... Open Hearth Process The open hearth furnace consists of a big brick room with a l... Suggestions For Handling High-speed Steels The following suggestions for handling high-speed steels are ... Correction For Cold-junction Errors The voltage generated by a thermo-couple of an electric pyrom... Annealing In Bone Steel and cast iron may both be annealed in granulated bone. ... Quality And Structure The quality of high-speed steel is dependent to a very great ... Machineability Reheating for machine ability was done at 100 deg. less than ... Gears The material used for all gears on the Liberty engine was sel... |
Lathe And Planer ToolsCategory: HIGH-SPEED STEEL FORGING.--Gently warm the steel to remove any chill, is particularly desirable in the winter, then heat slowly and carefully to a scaling heat, that is a lemon heat (1,800 to 2,000 deg.F.), and forge uniformly. Reheat the tool for further forging directly the steel begins to stiffen under the hammer. Under no circumstances forge the steel when the temperature falls below a dark lemon to an orange color about 1,700 deg.F. Reheat as often as is necessary to finish forging the tool to shape. Allow the tool to cool after forging by burying the tool in dry ashes or lime. Do not place on the damp ground or in a draught of air. The heating for forging should be done preferably in a pipe or muffle furnace but if this is not convenient use a good clean fire with plenty of fuel between the blast pipe and the tool. Never allow the tool to soak after the desired forging heat has been reached. Do not heat the tool further back than is necessary to shape the tool, but give the tool sufficient heat. See that the back of the tool is flatly dressed to provide proper support under the nose of the tool. HARDENING HIGH-SPEED STEEL.--Slowly reheat the cutting edge of the tool to a cherry red, 1,400 deg.F., then force the blast so as to raise the temperature quickly to a full white heat, 2,200 to 2,250 deg.F., that is, until the tool starts to sweat at the cutting face. Cool the point of the tool in a dry air blast or preferably in oil, further cool in oil keeping the tool moving until the tool has become black hot. To remove hardening strains reheat the tool to from 500 to 1,100 deg.F. Cool in oil or atmosphere. This second heat treatment adds to the toughness of the tool and therefore to its life. GRINDING TOOLS.--Grind tools to remove all scale. Use a quick-cutting, dry, abrasive wheel. If using a wet wheel, be sure to use plenty of water. Do not under any circumstances force the tool against the wheel so as to draw the color, as this is likely to set up checks on the surface of the tool to its detriment. Next: For Milling Cutters And Formed Tools Previous: Cutting-off Steel From Bar
Viewed 1487 |
||||||||||||||||||||
