Liang Wen, Wu Run, Liu Zhiyong, Tao Wenzhe, Chen Jiqing, Tan Jiamei. Cause Analysis on Strength Fluctuation of High-strength Steel with Mo-Ti[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(1): 81-84. doi: 10.7513/j.issn.1004-7638.2015.01.016
Citation:
Liang Wen, Wu Run, Liu Zhiyong, Tao Wenzhe, Chen Jiqing, Tan Jiamei. Cause Analysis on Strength Fluctuation of High-strength Steel with Mo-Ti[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(1): 81-84. doi: 10.7513/j.issn.1004-7638.2015.01.016
Liang Wen, Wu Run, Liu Zhiyong, Tao Wenzhe, Chen Jiqing, Tan Jiamei. Cause Analysis on Strength Fluctuation of High-strength Steel with Mo-Ti[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(1): 81-84. doi: 10.7513/j.issn.1004-7638.2015.01.016
Citation:
Liang Wen, Wu Run, Liu Zhiyong, Tao Wenzhe, Chen Jiqing, Tan Jiamei. Cause Analysis on Strength Fluctuation of High-strength Steel with Mo-Ti[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(1): 81-84. doi: 10.7513/j.issn.1004-7638.2015.01.016
The cause of strength fluctuation of Mo-Ti microalloyed high-strength steel was investigated by metallography observation and energy spectrum analysis. The results showed that strength fluctuation was mainly caused by higher coiling temperature and the inhomogeneous temperature profile through width direction. Thepeak precipitation temperature of the high-strength steel with 0.12Ti-0.10Mo（%） was about 570 ℃. Mo could promote a large amount of second phase （MoxTi1-x）（CyN1-y） precipitates in Ti microalloyedsteel,and the dispersive and nano-size second phase could yield strong precipitation strengthening effect. By lowering the coiling temperature and adopting the edge-masking technology in the laminar cooling line,the high-strength steel with tensile strength more than 800 MPa and homogeneous strength was obtained.
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