Effect of ferrite grain size on mechanical properties of 4340 AISI steel structure ferrite phase Bynayty

In this study, using thermal operations at different temperatures and different speeds Srdkrdn on the steel 340AISI, structures of the ferrite grain size was different. Next, the operation between the critical heat Tabkary operation at different temperatures and thermal annealing austenitic) austempering (ferrite phase structures Bynayt reached. Ferrite grain size number standard 112ASTM-E, and the percentage of its volume using image analysis to determine was. Tabkary course between the critical temperature thermal operations were selected so that the volume percent ferrite phase almost identical in all structures) about 34% (is. Test results of mechanical properties such as hardness, elasticity, and shock showed that like other materials, with Ryzshdn ferrite grain size, hardness and strength ncreases. between grain size and yield strength of the relationship is established Hull patch. Ryzshdn seeds also reduce the uniform elongation and total elongation increases.