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Research on new ways of decreasing distortion of steel parts during hardening in liquid media

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Author: 
Nikolai Kobasko
Abstract: 

In the paper a new direction in decreasing distortion of steel parts during quenching in liquid media is considered. Its essence consists in creation of thin insulating surface layer during quenching in low concentration of inverse solubility polymers. Simplified calculations of initial heat flux densities, to be compared with the first critical heat flux densities, are provided. Condition for absence of local film boiling is discussed. Accelerated cooling process during hardening should be interrupted prior local insulating layer during batch quenching is dissolved. Such technological process decreases significantly distortion of steel parts during hardening.