不同板厚对连铸船体钢10CrNiCu显微组织的影响

Effect of Plate Thickness on the Microstructure of ContinuousCast Hull Steel 10CrNiCu

利用透射电镜对不同厚度的 10CrNiCu连铸船体钢板的显微组织进行了研究。结果表明 ,在同样的热轧和高温回火工艺条件下 ,随板厚的增加 ,钢板组织中除铁素体与珠光体外 ,逐渐出现了贝氏体分解物 ;铁素体晶粒变大 ,晶界上的第二相增多且长大 ;珠光体片层间距离也略有增加。

The microstructures of continuous cast hull steel 10CrNiCu with different plate thickness were studied by transmission electron microscopy.The results show that at the same heat-rolled and high temperature tempered process,with plate thickness increasing,except ferrite and pearlite structures,bainite dissociated structures appear.Ferrite grain sizes get bigger,the second phases on the boundaries are more and bigger.Pearlite lath distance increases a little.The second phases,on the boundaries of ferrite,and the carbides,in bainite dissociated structures belong to Fe_3C carbides.