退火及热轧对碳钢-不锈钢爆炸焊接复合板性能的影响

Effects of annealing and hot-rolling on properties and microstructure of explosion-welded composite steel plate

通过EDS线扫描分析、SEM检测以及力学性能测定,研究了碳钢-不锈钢爆炸焊接复合板在焊态、退火态以及热轧态的力学性能和微区组织特征,分析了复合板元素过渡区域的特点.结果表明,退火热处理以及热轧处理均降低了复合板的抗拉强度和屈服强度,恢复了复合板的塑性以及韧性.复合板在焊态、退火态以及热轧态时的过渡区域具有不同的显微组织形态.退火后其过渡区域的波状界面结构与焊态基本一致,过渡区域宽度约为5μm左右,而热轧成薄板后的复合板,其过渡区域的波状界面消失,过渡区域宽度变宽,约为20μm.

The mechanical properties and microstructure of as-welded,as-annealed and as-rolled stainless steel-carbon steel composite plates produced by explosive welding were investigated by SEM and mechanical tests.The element diffusion of transition layer formed in explosive welding was measured by EDS linear scanning.The results show that both the annealing and the hot-rolling can reduce the tensile strength and yield strength of the composite plates,but improve the ductility and toughness of the composite plates.The microstructure of the transition layer of as-welded,as-annealed and as-rolled composite plates are different.The wavy interface of the as-annealed composite plate is similar to that of as-welded composite plates.The diffusion layer with thickness of only about 5 μm is formed.For as-rolled composite plate,the wavy interface disappears and the diffusion layer enlarges to about 20 μm in width.