Refractory steels - steel, which does not collapse under the influence of high (above 550 0 C) temperature and gases
Heat resistant steels - Steel, which is used for the manufacture of parts, under load at high temperatures.
Heat treatment - a set of operations thermal effects on metals and a set of operations thermal effects on metals and alloys for the purpose and edited neniya structure and with properties in the desired direction, by annealing, hardening, tempering, normalization and others.
Steel softening - the process in which steel is heated to a certain temperature, this temperature is held for a certain time, after which it is slowly cooled
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