将微合金钢在1200℃固溶1 h后水淬至室温,部分固溶态试样再经过700℃时效5、240 m in,然后应用强迫振动法测量微合金钢的内耗值,其中内耗测温范围为室温至430℃。内耗试验结果表明:在109℃产生的Snoek峰是碳原子微扩散引起的内耗峰,该...将微合金钢在1200℃固溶1 h后水淬至室温,部分固溶态试样再经过700℃时效5、240 m in,然后应用强迫振动法测量微合金钢的内耗值,其中内耗测温范围为室温至430℃。内耗试验结果表明:在109℃产生的Snoek峰是碳原子微扩散引起的内耗峰,该峰随着时效时间的延长,峰值逐渐减弱且不偏移,时效240 m in后该峰消失,主要是因为在时效过程中碳原子与合金元素形成碳化物以沉淀形式析出,从三维原子探针(3DAP)的测试结果可得到证实。在320℃左右产生的SKK峰是试验钢在1 200℃固溶产生大量位错结构,间隙原子偏聚于位错周围造成的,该峰随着时效时间的延长,峰值逐渐减弱并且向高温偏移,时效240 m in后该峰消失。展开更多
Rolling force and temperature field are important parameters in the hot rolling process of plate steel.Most researchers use ANSYS/LS-DYNA and MSC.Marc to simulate the hot rolling process,however,software DEFORM-3D is ...Rolling force and temperature field are important parameters in the hot rolling process of plate steel.Most researchers use ANSYS/LS-DYNA and MSC.Marc to simulate the hot rolling process,however,software DEFORM-3D is not used widely in this field.Therefore,in this study,the commercially available finite element analysis software DEFORM-3D is used to simulate the distribution of rolling force,stress-effective,strain-effective and temperature field during the hot rolling process of plate steel with the size of 0.220 m×2.070 m×1.904 m.Both the simulated rolling force and temperature of the multi-pass are compared with the measured results.It is shown that the simulated values by the finite element method are approximate to the measured values in the hot rolling of plate steel.So the simulation can provide an important reference and optimization to make rolling process and parameters in steel factory.展开更多
文摘将微合金钢在1200℃固溶1 h后水淬至室温,部分固溶态试样再经过700℃时效5、240 m in,然后应用强迫振动法测量微合金钢的内耗值,其中内耗测温范围为室温至430℃。内耗试验结果表明:在109℃产生的Snoek峰是碳原子微扩散引起的内耗峰,该峰随着时效时间的延长,峰值逐渐减弱且不偏移,时效240 m in后该峰消失,主要是因为在时效过程中碳原子与合金元素形成碳化物以沉淀形式析出,从三维原子探针(3DAP)的测试结果可得到证实。在320℃左右产生的SKK峰是试验钢在1 200℃固溶产生大量位错结构,间隙原子偏聚于位错周围造成的,该峰随着时效时间的延长,峰值逐渐减弱并且向高温偏移,时效240 m in后该峰消失。
文摘Rolling force and temperature field are important parameters in the hot rolling process of plate steel.Most researchers use ANSYS/LS-DYNA and MSC.Marc to simulate the hot rolling process,however,software DEFORM-3D is not used widely in this field.Therefore,in this study,the commercially available finite element analysis software DEFORM-3D is used to simulate the distribution of rolling force,stress-effective,strain-effective and temperature field during the hot rolling process of plate steel with the size of 0.220 m×2.070 m×1.904 m.Both the simulated rolling force and temperature of the multi-pass are compared with the measured results.It is shown that the simulated values by the finite element method are approximate to the measured values in the hot rolling of plate steel.So the simulation can provide an important reference and optimization to make rolling process and parameters in steel factory.
