pearlite

How To Use pearlite In A Sentence

• When cooled slowly below 670 degrees, martensite yields a heterogeneous mixture of pearlite and ferrite (or cementite, if the original mixture contained between 0.8 per cent. and two per cent. of carbon). Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86
• Ductility and impact properties are principally determined by the proportions of ferrite and pearlite in the matrix.
• At faster cooling rates, however, the microstructure almost fully transforms into martensite; increasing from approximately 15\% martensite, 85\% bainite / pearlite to 87\% martensite, 13\% bainite / pearlite at the highest cooling rate, based on a point-count method. Machine Design -
• Holding in the lower pearlite range accelerates subsequent transformation to bainite.
• It is important to note that higher silicon contents can promote pearlite and may increase the nickel requirement.
• In the ordinary practice of hardening steels, the quenching is not so drastic, and the transformation of austenite back to ferrite and cementite is more or less completely effected, giving rise to certain transitory forms which are known as "martensite," "troostite," "sorbite," and finally, pearlite. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel
• At that moment, in fact, the ferrite, cementite or pearlite which previously existed has lost its identity by everything going into the solid solution called austenite. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel
• For the high-silicon nodular irons, high-temperature heat treatment is advised in all cases to anneal any pearlite and stabilize the casting against growth in service.
• The properties obtained subsequently depend on the coarseness of the pearlite and ferrite and their relative distribution.
• As described in the previous section, alloying must be sufficient to ensure that a pearlite-free microstructure is obtained in heat treatment.