- 업종: Government; Labor
- Number of terms: 77176
- Number of blossaries: 0
- Company Profile:
A professional who controls heat-treating furnaces, baths and quenching equipment to alter physical and chemical properties of metal objects, using specifications and methods of controlled heating and cooling, such as hardening, tempering, annealing, case-hardening, and normalizing. Respnsibilities include:
* Determines temperature and time of heating cycle, and type and temperature of baths and quenching medium to attain specified hardness, toughness, and ductility of parts, using standard heat-treating charts, and utilizing knowledge of heat-treating methods, equipment, and properties of metals.
* Adjusts furnace controls and observes pyrometer to bring furnace to prescribed temperature.
* Loads parts into furnace.
* Removes parts after prescribed time and quenches parts in water, oil, brine, or other bath, or allows parts to cool in air.
* May test hardness of parts.
* May set up and operate die-quenching machine to prevent parts from warping.
* May set up and operate electronic induction equipment to heat objects.
* May align warped fuel elements, containing radioactive uranium, using hydraulic ram straightener.
Industry:Professional careers
A professional who performs duties as described under apprentice master title.
Industry:Professional careers
A professional who tests metal objects to determine their degree of hardness, using hardness testing equipment. Respnsibilities include:
* Positions workpiece on anvil of testing machine and turns controls to press steel ball or diamond point against surface of piece or to allow diamond-pointed hammer fall on surface to be tested.
* Measures diameter of indentation caused by steel balls, using microscope, or reads scale on test equipment that indicates depth of penetration of ball or diamond point, or calibrated height of hammer rebound.
* Reads hardness number from calibrated scale on equipment or converts scale reading to hardness number, using formula or conversion chart.
* Important variables may be indicated by trade names of equipment used.
* May cut cross section of sample part and examine part under microscope to determine hardness depth.
Industry:Professional careers
A professional who tends furnace that heats rivets to specified temperature. Respnsibilities include:
* Places specified rivets in gas, oil, or coke furnace, or between electrodes in electric furnace.
* Turns knobs to regulate heat or current of furnace.
* Removes rivets from furnace when color indicates rivets are heated to specified temperature and throws rivets to riveter helper, using tongs.
* May tend portable coke furnace to heat rivets in field.
* May be designated according to type of furnace tended as Rivet Heater, Electric (heat treating); Rivet Heater, Gas (heat treating).
Industry:Professional careers
A professional who tends equipment that transfers steel slabs from conveyor onto charging table of reheating furnace. Respnsibilities include:
* Moves controls to transfer slab from conveyor onto depiler.
* Measures slab for conformance to specifications, using tape, and compares identifying marks on slab with information on charging schedule.
* Pushes levers to lower depiler table and cause pushoff arm of depiler to push slab onto charging table.
* Assists furnace crew in cleaning bottom of furnace and hearth and in positioning slabs in furnace.
Industry:Professional careers
A professional who tends equipment that transfers steel slabs from conveyor onto charging table of reheating furnace. Respnsibilities include:
* Moves controls to transfer slab from conveyor onto depiler.
* Measures slab for conformance to specifications, using tape, and compares identifying marks on slab with information on charging schedule.
* Pushes levers to lower depiler table and cause pushoff arm of depiler to push slab onto charging table.
* Assists furnace crew in cleaning bottom of furnace and hearth and in positioning slabs in furnace.
Industry:Professional careers
A professional who tends charging mechanism that moves steel shapes, such as blooms, billets, and slabs, in specified sequence, through soaking-pit furnace. Respnsibilities include:
* Signals charger-operator helper or overhead crane operator to position steel on furnace skids.
* Moves levers on control panel to position skid on entry bed, open furnace door, and start pusher arm that pushes steel into furnace.
* Observes inside of furnace, projected on television screen, and moves controls to spot steel in specified locations.
* Moves controls to discharge steel onto mill rollers.
* Records quantity of steel charged and discharged.
* Assists other workers in cleaning furnace bottoms and repairing or replacing defective equipment, using handtools.
Industry:Professional careers
A professional who heat treats jewelry fittings to soften fittings for further processing, using electric or gas furnace. Respnsibilities include:
* Sets automatic controls to specified temperature.
* Fills steel tray with fittings and places fittings in oven, using tongs.
* Removes tray after specified time and immerses fittings in water.
* May clean oxide and scale from fittings by immersing fittings in chemical and water baths.
* May heat treat ingots, using Bunsen burner or torch, and immerse ingots in alcohol to restore ingot malleability.
* May open and close gas valves, ignite and extinguish gas flames, and set time clock alarm for heating and cooling periods.
Industry:Professional careers
A professional who controls furnace to relieve internal stresses in metal objects and to soften and refine grain structure. Respnsibilities include:
* Reads production schedule to determine processing sequence and furnace temperatures for objects to be processed.
* Turns furnace controls and observes gauges to prepare furnace for annealing process.
* Charges objects directly onto furnace bed, or packs objects into section of furnace or tubes sealed with clay to prevent oxidation.
* Reduces heat and allows objects to cool in furnace, or removes objects from furnace to cool in open air.
* May operate continuous furnace through which objects are passed by means of reels and conveyors and be designated Continuous-Annealing Furnace Operator (heat treating).
* May anneal wire and be designated Pot Annealer (heat treating).
Industry:Professional careers
A professional who controls furnace to harden surface of steel objects, using any of following methods. Respnsibilities include:
* (1) Places objects in wire basket and immerses them in heated chemical bath, such as sodium cyanide.
* (2) Packs objects in metal boxes filled with carbonaceous material, such as coke, coal, bone charcoal, or barium carbonate, and charges boxes into furnace.
* (3) Charges objects into furnace and opens valves to circulate carbon-rich gas, such as methane, around objects during heating process.
* Removes objects from bath or furnace and quenches objects in oil, water, or brine, or allows objects to cool to predetermined temperature before quenching, depending on metal properties specified.
* May be designated according to article case-hardened as Die Case Hardener (heat treating); or by process used as Cyanide Furnace Operator (heat treating).
Industry:Professional careers
