سال انتشار: ۱۳۸۸

محل انتشار: کنگره بین المللی جوش و روشهای اتصال

تعداد صفحات: ۵

نویسنده(ها):

a abyazi – sahand university of tech
a.r ebrahimi –

چکیده:

the lamellar tearing is current in welded hot rolled structure steels it occurs if welding had been parallel to rolling direction it had shown that the basic causes for occurring lamellar tearing is the existence of elonated non metallic inclusions in steel the procedure and acceptance standards fro evaluating rolled steel plates to assuring freedom from lamination are assessed in SA-435/SA435M standard inspite of observation of lamellar tearing by ultrasonic examination the cause and details about occurrig lamellar tearing had not been significantly assessed in thid study two resistant and susceptible steel plates had been chosen using ultrasonic examination then the microstructural properties of these steel had been compared with another furthermore the types aspect ratio surface fraction and size of nonmetallic inclusion had been significantly assessed and evaluated by ultrasonic results.