Study on Heat Treatment Process of SA738Gr.B Steel Plats for Nuclear Power Plant
HAN Qibiao
JIANG Shanyu
SUN Weihua
Abstract：In order to meet the high performance requirements of SA738Gr.B steel plate for nuclear power plant, on the basis of lab tests, heat treatment process parameters in industrial production are studied. The results showed that Pro-eutectoid ferrite precipitation can be avoided when quenching cooling rate greater than 5℃/s;The steel plates have smaller and more uniform lath bainite when quenching temperature is higher;With the extension of heating holding time in quenching, the grains are coarser and ferrite content reduces;With the increase of the tempering temperature, grains coarsen, and the content of bainite reduces, ferrite content increases; In industrial production, tensile properties is superior when water quantity of quenching is higher; With the increase of the tempering time, the steel strength decreases and the impact toughness increases. When the steel plate was heated in 920℃×2.0 min/mm, and subsequently quenched in Q2 program with higher water flow, then tempered in 650℃×1.5 min/mm, the best match of the strength and toughness can be achieved.
Keywords：steel for nuclear power plantSA738Gr.B steelheat treatmentmicrostructuremechanical property
Publication Date：2014-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：4( 36-38,40 )