高强度冷轧汽车用钢1500MS连铸板坯的高温力学性能
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摘要
试验用1500MS钢(/%:0.20C,0.31Si,1.39Mn,0.011P,0.001S,0.028Als,0.26Cr,0.028Ti,0.001 8B,0.004 8N)240 mm板坯的生产流程为250 t BOF-LF-RH-板坯连铸。通过Gleeble-1500热模拟试验机,测试了试验钢1 350~600℃的力学性能,得出该钢第Ⅰ脆性区为1 350~1 250℃,第Ⅲ脆性区为650~750℃在800~1 200℃铸坯具有良好的热塑性;建立了板坯凝固传热数学模型和计算了铸坯凝固过程的表面温度。1500MS钢铸坯矫直区域的温度应控制在800~1150℃。
The production flowsheet of 240 mm slab of tested steel 1500 MS(/% : 0. 20 C, 0.31 Si, 1.39 Mn,0.011 P, 0.001 S, 0.028 Als, 0.26 Cr, 0.028 Ti, 0.001 8 B, 0.004 8 N) is 250 t BOF-LF-RH-slab CC process. The mechanical properties of tested steel at 1 350 ~600℃ have been measured by using Gleeble-1500 thermal simulation machine to get Ⅰ-brittle zone at 1 350 ~1 250℃,and Ⅲ-brittle zone at 650~750℃, and at 800 ~1 200℃ the tested steel has better hot plasticity; and the mathematical model of slab solidification heat transfer is established and the surface temperature of casting slab in solidification process is calculated. The temperature of tested steel of steel 1500 MS at straightening zone should be controlled at 800 ~1 150℃.
The production flowsheet of 240 mm slab of tested steel 1500 MS(/% : 0. 20 C, 0.31 Si, 1.39 Mn,0.011 P, 0.001 S, 0.028 Als, 0.26 Cr, 0.028 Ti, 0.001 8 B, 0.004 8 N) is 250 t BOF-LF-RH-slab CC process. The mechanical properties of tested steel at 1 350 ~600℃ have been measured by using Gleeble-1500 thermal simulation machine to get Ⅰ-brittle zone at 1 350 ~1 250℃,and Ⅲ-brittle zone at 650~750℃, and at 800 ~1 200℃ the tested steel has better hot plasticity; and the mathematical model of slab solidification heat transfer is established and the surface temperature of casting slab in solidification process is calculated. The temperature of tested steel of steel 1500 MS at straightening zone should be controlled at 800 ~1 150℃.
引文
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[3]刘青,张建峰,张晓峰,等.合金弹簧钢连铸坯高温力学性能分析[J].重庆大学学报,2013,36(05):44-50.
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[5]Suzuki H G,Nishimura S and Yamaguchi S.Charaeteristies of Embrittlement in Steel Abaove 600℃[J].Tetsu-to-Hagane,1979,65(14):2038-2046.
[6]Suzuki H G,Nishimura S and Imamura J.Hot Ductility in Steels in the Temperature Range Between 900 and 600℃[J].Tetsu-toHagane,1981,67(8):1180-1189.
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