Yellow-is the most visible color and is the first color the human eye notices! Yellow, the color nearest to light leaves a warm and satisfying impression, lively and stimulating and in many cultures symbolizes deity.
Quench C hardening is a mechanical process in which steel and cast iron alloys are strengthened and hardened. These metals consist of ferrous metals and alloys. This is done by heating the material to a certain temperature, depending on the material.uench metals is a progression; the first step is heating, i.e. heating it to the required temperature. Second step is soaking. Soaking can be done by air (air furnace), or a bath or in a vacuum. The soaking time in air furnaces should be 1 to 2 minutes for each millimeter of cross-section.
Cutting thick metal is a little different than cutting sheet metal. Thick metal means slower cutting, wider cut or kerf, more slag remaining (the leftover molten metal on the edge of the cut), and longer pierce time. If you are piercing the metal, the 45Â° angle is vital.