METHOD OF DETERMINATION OF CONTENT OF FERRITE PHASE IN ARTICLE Russian patent published in 1996 - IPC

FIELD: measurement technology. SUBSTANCE: method can be used to test content of ferrite phase in austentic and austentic-ferritic steels of machine-building equipment including welds and surfacing. In compliance with method magnetic method is used to measure local content of ferrite phase in basic metal, welds and surfacing of equipment. For this measurement of content of ferrite phase is performed on standard sample in advance with various levels of its loading. Voltage and change of ferrite phase are registered and dependence between voltage and change of content of ferrite phase is established. Value of voltage effective in tested zone of equipment is found. After this content of ferrite phase in tested zone of equipment is measured and correction for value of voltage in agreement with dependence between voltage and change of content of ferrite phase is entered into obtained value. EFFECT: capability to obtain comparable values of content of ferrite phase in different laboratories thanks to exclusion of error caused by not taking into account voltage effective in tested zone.