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.
Tungsten has the highest melting point of all metals and is alloyed with other metals to strengthen them. Tungsten and its alloys are used in many high-temperature applications, such as arc-welding electrodes and heating elements in high-temperature furnaces.Tungsten carbide is immensely hard and is very important to the metal-working, mining and petroleum industries.It is made by mixing tungsten powder and carbon powder and heating to 2200Â°C. It makes excellent cutting and drilling tools, including a new âpainlessâ dental drill which spins at ultra-high speeds.ungsten is the heaviest metal to have a known biological role. Some bacteria use tungsten in an enzyme to reduce carboxylic acids to aldehydes. Natural abundance. The principal tungsten-containing ores are scheelite and wolframite. The metal is obtained commercially by reducing tungsten oxide with hydrogen or carbon.