l 设计概况 如图1所示的悬索通廊由武汉钢铁设计研究院设计,为全钢单跨单链式悬索结构,跨度70.230m,通廊面宽4.500m,高7.000m(相对标高),设计均布荷载2500N/m^2,系武钢综合煤场皮带通廊的一部分。设计悬索支柱为型钢格构柱,柱顶标高18.0...l 设计概况 如图1所示的悬索通廊由武汉钢铁设计研究院设计,为全钢单跨单链式悬索结构,跨度70.230m,通廊面宽4.500m,高7.000m(相对标高),设计均布荷载2500N/m^2,系武钢综合煤场皮带通廊的一部分。设计悬索支柱为型钢格构柱,柱顶标高18.000m(相对标高)。主索二根,矢高9.000m,呈y=2px^2二次抛物线,每根主索由二根直径φ47.5mm的6×37+1麻芯钢丝绳用绳夹夹在一起组成,每边边索为六根单根同样直径的钢丝绳,主、边索分别绕过支柱顶的滑轮片用绳夹锚固,边索下端采用铸钢锚环套筒浇锌、铜、铝合金锚固。吊杆间距3m,为30mm园钢,其上设有可调节长度的正反螺旋扣。通廊面为型钢骨架,钢板铺面(见图2)。展开更多
A novel method,i.e.multi-cyclic quenching and partitioning(M-Q-P)heat treatment,is used to tailor the content of retained austenite(RA)in commercial steels.For 35CrMnSi steel,5 times of Q-P heat treatment can increase...A novel method,i.e.multi-cyclic quenching and partitioning(M-Q-P)heat treatment,is used to tailor the content of retained austenite(RA)in commercial steels.For 35CrMnSi steel,5 times of Q-P heat treatment can increase the content of RA from 8vol.%to 17 vol.%.As a result,the ultimate elongation of the steel is improved from 17.4%after the typical Q-P heat treatment to 27.1%after 5 times of Q-P treatment.Meanwhile,the improved combination of strength and ductility for steels by typical Q-P heat treatment is retained by the multi-cyclic Q-P heat treatment.It is shown that the content of RA in some specific steels,and furthermore their mechanical properties,can be regulated through the M-Q-P.展开更多
文摘A novel method,i.e.multi-cyclic quenching and partitioning(M-Q-P)heat treatment,is used to tailor the content of retained austenite(RA)in commercial steels.For 35CrMnSi steel,5 times of Q-P heat treatment can increase the content of RA from 8vol.%to 17 vol.%.As a result,the ultimate elongation of the steel is improved from 17.4%after the typical Q-P heat treatment to 27.1%after 5 times of Q-P treatment.Meanwhile,the improved combination of strength and ductility for steels by typical Q-P heat treatment is retained by the multi-cyclic Q-P heat treatment.It is shown that the content of RA in some specific steels,and furthermore their mechanical properties,can be regulated through the M-Q-P.
