| The best time to perform this spell is during the Full Moon, although, you can also do it on a Friday during the Waxing Moon. Ingredients/Tools: -Bowl of spring water -herbs for beauty, such as lavender an... Read more of GLAMOUR AND BEAUTY SPELL at White Magic.ca |  Informational.caPrivacy |
Steel MakingS A E Heat TreatmentsThe Society of Automotive Engineers have adopted certain heat... Heat Treatment Of Steel Heat treatment consists in heating and cooling metal at defin... Suggestions For Handling High-speed Steels The following suggestions for handling high-speed steels are ... Rate Of Cooling At the option of the manufacturer, the above treatment of gea... Sulphur SULPHUR is another element (symbol S) which is always found i... Lathe And Planer Tools FORGING.--Gently warm the steel to remove any chill, is parti... Temperature For Annealing Theoretically, annealing should be accomplished at a tempera... Lathe And Planer Tools TO FORGE.--Gently warm the steel to remove any chill is parti... Hardening Steel is hardened by quenching from above the upper critical.... Liberty Motor Connecting Rods The requirements for materials for the Liberty motor connecti... Steel Can Be Worked Cold As noted above, steel can be worked cold, as in the case of ... Correction By Zero Adjustment Many pyrometers are supplied with a zero adjuster, by means ... The Pyrometer And Its Use In the heat treatment of steel, it has become absolutely nece... Surface Carburizing Carburizing, commonly called case-hardening, is the art of pr... Cyanide Bath For Tool Steels All high-carbon tool steels are heated in a cyanide bath. Wi... Brown Automatic Signaling Pyrometer In large heat-treating plants it has been customary to mainta... Machineability Reheating for machine ability was done at 100 deg. less than ... Quenching Tool Steel To secure proper hardness, the cooling of quenching of steel ... Blending The Compound Essentially, this consists of the sturdy, power-driven separa... Protectors For Thermo-couples Thermo-couples must be protected from the danger of mechanica... |
Process Of CarburizingCategory: HEAT TREATMENT OF STEEL Carburizing imparts a shell of high-carbon content to a low-carbon steel. This produces what might be termed a dual steel, allowing for an outer shell which when hardened would withstand wear, and a soft ductile core to produce ductility and withstand shock. The operation is carried out by packing the work to be carburized in boxes with a material rich in carbon and maintaining the box so charged at a temperature in excess of the highest critical point for a length of time to produce the desired depth of carburized zone. Generally maintaining the temperature at 1,650 to 1,700 deg. F. for 7 hr. will produce a carburized zone 1/32 in. deep. Heating to a temperature slightly above the highest critical point and cooling suddenly in some quenching medium, such as water or oil hardens the steel. This treatment produces a maximum refinement with the maximum strength. Drawing to a temperature below the highest critical point (the temperature being governed by the results required) relieves the hardening strains set up by quenching, as well as the reducing of the hardness and brittleness of hardened steel. Next: Effects Of Proper Annealing Previous: Annealing Work
Viewed 760 |
||||||||||||||||||||
