In order to describe the thermal–mechanical behavior of the ship plate steel continuous casting slab during solidification end heavy reduction(HR)process accurately,its constitutive behavior was investigated by a sin...In order to describe the thermal–mechanical behavior of the ship plate steel continuous casting slab during solidification end heavy reduction(HR)process accurately,its constitutive behavior was investigated by a single-pass thermal compression experiment.According to the deformation features of wide thick continuous casting slab with HR,the simulation temperature ranged from 1173 to 1573 K with strain rates of 0.0001,0.001,0.01 and 0.1 s^(-1).Three different constitutive models,the modified Johnson–Cook(JC)model,the modified Zerilli–Armstrong(ZA)model and the Arrhenius model,were established according to the obtained true stress–strain curves.The average relative error of the modified JC model,the modified ZA model and the Arrhenius model are 10.82%,9.96%and 6.21%,respectively.Considering the obvious softening effect of the flow curve at a low strain rate,the secondary softening factor under the interaction of low strain rate and the temperature was introduced in the original Arrhenius model.Compared to the Arrhenius model,the modified Arrhenius model error decreased from 6.21%to 4.73%.展开更多
在大型集装箱船抗扭箱舷顶列板焊接中,采用大线能量双丝气电立焊的焊接方法,从板材、焊材、坡口角度及间隙等方面,研究大线能量钢板E40-W600的焊接工艺。由双丝气电立焊的焊接接头理化试验可知,国产E40-W600大线能量钢板的力学性能等能...在大型集装箱船抗扭箱舷顶列板焊接中,采用大线能量双丝气电立焊的焊接方法,从板材、焊材、坡口角度及间隙等方面,研究大线能量钢板E40-W600的焊接工艺。由双丝气电立焊的焊接接头理化试验可知,国产E40-W600大线能量钢板的力学性能等能够满足挪威船级社(Det Norske Veritas,DNV)的规范要求。该技术应用于大型集装箱船建造,与传统的二氧化碳气体保护焊相比,焊接效率提高了10~12倍。展开更多
基金The present work was financially supported by the National Natural Science Foundation of China(Nos.51974078 and U20A20272)Science and Technology Planning Project of Liaoning Province(Nos.2022JH2/101300002 and 2022JH25/10200003)the Fundamental Research Funds for the Central Universities of China(No.N2125018).
文摘In order to describe the thermal–mechanical behavior of the ship plate steel continuous casting slab during solidification end heavy reduction(HR)process accurately,its constitutive behavior was investigated by a single-pass thermal compression experiment.According to the deformation features of wide thick continuous casting slab with HR,the simulation temperature ranged from 1173 to 1573 K with strain rates of 0.0001,0.001,0.01 and 0.1 s^(-1).Three different constitutive models,the modified Johnson–Cook(JC)model,the modified Zerilli–Armstrong(ZA)model and the Arrhenius model,were established according to the obtained true stress–strain curves.The average relative error of the modified JC model,the modified ZA model and the Arrhenius model are 10.82%,9.96%and 6.21%,respectively.Considering the obvious softening effect of the flow curve at a low strain rate,the secondary softening factor under the interaction of low strain rate and the temperature was introduced in the original Arrhenius model.Compared to the Arrhenius model,the modified Arrhenius model error decreased from 6.21%to 4.73%.
文摘在大型集装箱船抗扭箱舷顶列板焊接中,采用大线能量双丝气电立焊的焊接方法,从板材、焊材、坡口角度及间隙等方面,研究大线能量钢板E40-W600的焊接工艺。由双丝气电立焊的焊接接头理化试验可知,国产E40-W600大线能量钢板的力学性能等能够满足挪威船级社(Det Norske Veritas,DNV)的规范要求。该技术应用于大型集装箱船建造,与传统的二氧化碳气体保护焊相比,焊接效率提高了10~12倍。
