PROCEDURE FOR THERMAL TREATMENT OF HIGH PURITY IRON

FIELD: metallurgy. ^ SUBSTANCE: pure iron is treated in cycles each consisting of two stages: first iron is heated to 900-1000C, conditioned in medium of bondjuzhskiy carburiser for 0.5-1 h and cooled in air. Further, it is heated to 900-1000C, conditioned in air for 5-15 min and chilled in cold wat...

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Hauptverfasser:	KUZ'MIN STANISLAV VIKTOROVICH, TOLSTOGUZOV VASILIJ NIKOLAEVICH, KOPYT'KO ANNA ANATOL'EVNA, TIBEJKIN IL'JA JUR'EVICH, DOLGOVA SVETLANA VLADIMIROVNA, VASHCHENKO ALEKSEJ JUR'EVICH, AFANAS'EV VLADIMIR KONSTANTINOVICH, LAVROVA NATAL'JA BORISOVNA, DZHEMELA PAVEL VALER'EVICH
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	FIELD: metallurgy. ^ SUBSTANCE: pure iron is treated in cycles each consisting of two stages: first iron is heated to 900-1000C, conditioned in medium of bondjuzhskiy carburiser for 0.5-1 h and cooled in air. Further, it is heated to 900-1000C, conditioned in air for 5-15 min and chilled in cold water. Number of cycles comes to five. ^ EFFECT: lowered coefficient of linear expansion of iron items. ^ 1 ex, 1 dwg, 1 tbl Изобретение относится к технологии термической обработки высокочистого железа. Для снижения коэффициента линейного расширения железных изделий обработку чистого железа осуществляют циклически, каждый цикл включает две стадии: сначала нагрев ведут до 900-1000°С, выдерживают в среде бондюжского карбюризатора 0,5-1 ч и охлаждают на воздухе, затем - до 900-1000°С с выдержкой на воздухе 5-15 мин и охлаждают в холодной воде, а количество циклов составляет до пяти. 1 ил., 1 табл.