Open AccessStudy on Microstructure and Properties of 1000MPa Grade Steel Plate for Hydropower Station
Author(s) -
Lulu Feng,
Dong Zhang,
Kaiming Wu,
Weiwen Qiao
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1637/1/012072
Subject(s) - tempering , quenching (fluorescence) , microstructure , materials science , elongation , metallurgy , lath , ultimate tensile strength , toughness , composite material , atmospheric temperature range , martensite , physics , quantum mechanics , meteorology , fluorescence
The influences of heat treatment on the microstructural and mechanical properties of 1000M hydropower station steel plate were studied. The changes in the microstructure and mechanical properties of the investigated steel at different quenching and tempering temperatures were analyzed. It was found that test steel at lower-temperature quenching was transformed into granular bainites and at high quenching temperatures were transformed into lath bainites. Moreover, With the increasing tempering temperature, the yield strength of the test steel first increased and then gradually decreased after reaching the maximum value at 630 °C, whereas the tensile strength decreased unilaterally until the tempering temperature reached 650 °C. Furthermore, the percentage elongation and the low-temperature(−40 °C) impact toughness increased significantly during tempering. Therefore, the quenching treatment was carried out 930 °C, whereas tempering temperature was selected in the range of 600–630 °C.