Zhen Weijing, Chen Jundong, Li Yongliang, Wang Fuming. Effect of Annealing Process on Microstructure and Mechanical Properties of 1 180 MPa Dual Phase Steel[J]. IRON STEEL VANADIUM TITANIUM, 2020, 41(4): 145-149. doi: 10.7513/j.issn.1004-7638.2020.04.026
Citation:
Zhen Weijing, Chen Jundong, Li Yongliang, Wang Fuming. Effect of Annealing Process on Microstructure and Mechanical Properties of 1 180 MPa Dual Phase Steel[J]. IRON STEEL VANADIUM TITANIUM, 2020, 41(4): 145-149. doi: 10.7513/j.issn.1004-7638.2020.04.026
Zhen Weijing, Chen Jundong, Li Yongliang, Wang Fuming. Effect of Annealing Process on Microstructure and Mechanical Properties of 1 180 MPa Dual Phase Steel[J]. IRON STEEL VANADIUM TITANIUM, 2020, 41(4): 145-149. doi: 10.7513/j.issn.1004-7638.2020.04.026
Citation:
Zhen Weijing, Chen Jundong, Li Yongliang, Wang Fuming. Effect of Annealing Process on Microstructure and Mechanical Properties of 1 180 MPa Dual Phase Steel[J]. IRON STEEL VANADIUM TITANIUM, 2020, 41(4): 145-149. doi: 10.7513/j.issn.1004-7638.2020.04.026
The influence of annealing process on microstructure and mechanical properties of super high strength steel DP1180 was studied by means of thermo-simulator system Gleeble-3500,field emission scanning electron microscopy and transmission electron microscope.The results show that the yield strength declines quickly when the annealing temperature is below 760 ℃ due to the annealing soften effect,but the martensite fraction shows no visible increasing.When the temperature is above 800 ℃, the strength decreases gradually because of the excessive austenitization and banitic transformation which could be attributed to the decreasing carbon concentration in austenite.A perfect match of strength and plastic could obtained when steel is annealed at between 760～800 ℃,at the same time,a refined and homogeneous microstructure could be obtained.
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