Do not take food or beverages where oils are either being used or stored. Do not take oil-soaked clothes or equipment to areas where there are food or beverages.ġ9. Be on the lookout for contamination from pieces of carburized metal.ġ8. Make sure there is good ventilation in the work area.ġ7. Fumes from the molten carburizing salt bath should not be inhaled, because carbon monoxide is a product of the carburizing process.ġ6. If any skin trouble is shown or suspected, report to your instructor and get medical help.ġ5. Before breaks and before moving on to the next task, wash your hands thoroughly.ġ4. If possible, keep tools, baskets, jigs, and work areas free from oil contamination.ġ3. Use a nonflammable absorbent to clean leaks and oil spills. When quench tanks are not being used, always cover them.ġ1. Make sure that an appropriate fungicide or bacterial inhibitor has been mixed into the quenching liquid.ġ0. Before taking materials out of the liquid carburizing pot, make sure that the tongs are not wet and that they are the correct tongs for the job.ĩ. Explosions can be results of moisture coming into contact with the quenching oil.Ĩ. Make sure that the quenching oil is not contaminated by water. During the process of lighting an oil or gas-fired furnace, do NOT stand directly in front of it.ħ. When lighting the furnace, obey the instructions that have been provided by the manufacturer.Ħ. Make sure that there is sufficient ventilation in the quenching areas in order to maintain desired oil mist levels.ĥ. Coolant will absorb heat given off by the metal as it is cooling, but if there is insufficient coolant, the metal will not cool at the optimal speed.Ĥ. Make sure that there is enough coolant for the job. Before lighting the furnace, make sure that air switches, exhaust fans, automatic shut-off valves, and other safety precautions are in place.ģ. Wear heat-resistant protective clothing, gloves, safety glasses, and a face shield to prevent exposure to hot oils, which can burn skin.Ģ. The following procedures are suggested for a safe heat treating operation.ġ. Describe the proper heat treating procedures for other tool steels.
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