cementite sentence in Hindi
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- That would be done in a refinery where raw coal was used to remove silicon and convert carbon within the raw material, found in the form of graphite, to a combination with iron called cementite.
- If it is hypereutectoid steel ( more than 0.77 wt % C ) then the structure is full pearlite with small grains ( larger than the pearlite lamella ) of cementite formed on the grain boundaries.
- Two methods of tempering are used, called " white tempering " and " black tempering . " The purposes of both tempering methods is to cause the cementite within the ledeburite to decompose, increasing the ductility.
- Also, malleable iron and spheroidized steel are different materials-- spheroidized steel is MUCH lower in carbon, and doesn't normally contain silicon ( which is why it contains cementite rather than graphite ).
- To perform a full anneal on a steel for example, steel is heated to slightly above the austenitic temperature and held for sufficient time to allow the material to fully form austenite or austenite-cementite grain structure.
- Sodium picrate is used as an etchant in metallography to differ preeutectoid ferrite in hypoeutectoid steel from preeutectoid cementite in hypereutectoid steel by etching cementite to a dark colour, whereas not attacking ferrite and thus it remains reflective.
- Sodium picrate is used as an etchant in metallography to differ preeutectoid ferrite in hypoeutectoid steel from preeutectoid cementite in hypereutectoid steel by etching cementite to a dark colour, whereas not attacking ferrite and thus it remains reflective.
- In spheroidized steel, the cementite network breaks apart and recedes into rods or spherical shaped globules, and the steel becomes softer than annealed steel; nearly as soft as pure iron, making it very easy to machine.
- Cooling a mixture of iron with 0.8 % carbon slowly below 723 �C to room temperature results in separate, alternating layers of cementite and ferrite, which is soft and malleable and is called pearlite for its appearance.
- Below around 700 �C ( 727 �C in eutectic iron ) the austenite is thermodynamically unstable and, under equilibrium conditions, it will undergo a eutectoid reaction and form pearlite an interleaved mixture of cementite ( Fe 3 C ).
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