| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Heat treater | Occupations | 1: Feeds and off bears furnace that heats semiconductor wafers to relieve stress caused by sawing and to stabilize resistivity: Transfers wafers from storage container to quartz $T3boat.$T1 Places boat on conveyor belt that automatically moves wafers through furnace. Removes boat from conveyor belt at furnace exit. Transfers wafers from boat to storage container after cooling. Records production information on work order. (references) | |
| 2: Heat treats jewelry fittings to soften fittings for further processing, using electric or gas furnace: 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. (references) | |||
| Heat treater I | Occupations | 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: 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 [HARDNESS INSPECTOR (heat treating)]. May set up and operate die-quenching machine to prevent parts from warping. May set up and operate electronic induction equipment to heat objects [INDUCTION-MACHINE SETTER (heat treating)]. May align warped fuel elements, containing radioactive uranium, using hydraulic ram straightener. (references) | |
| Heat treater II | Occupations | Controls one or more furnaces to heat treat metal objects according to specifications: Places parts in racks, trays, or baskets, and places objects on conveyor or loads objects directly into furnace. Adjusts furnace temperature and observes pyrometer to heat metal to prescribed temperature. Sets speed of conveyor for prescribed time cycle, or records removal time of parts to ensure objects attain specified temperature for a specified time. Removes parts after prescribed time and quenches parts in water, oil, or other bath, or allows parts to cool in air. May test hardness of parts [HARDNESS INSPECTOR (heat treating) ]. May feed die-quenching machine to prevent parts from warping. May degrease or remove scale from parts. May draw wire or sheet metal through furnace and attach metal to winding mechanism that pulls metal through furnace. (references) | |
| Tool heat treater | Mining | One who hardens and tempers tools, dies, and fixtures. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
