工程科学学报2015，Vol.37Issue(12)：1575-1580,6.DOI:10.13374/j.issn2095-9389.2015.12.007
搅拌摩擦加工IF钢的组织性能
Microstructure and mechanical properties of friction stir processed IF steel
摘要
Abstract
Friction stir processing was applied to cool-rolled DC04 IF steel plates with a thickness of 3 mm, and the microstructure and mechanical properties of the processed zone were investigated. A defect-free specimen with a shiny and smooth surface is fabrica-ted at a tool rotation rate of 950 r·min-1 and a travel speed of 60 mm·min-1 using additional forced cooling technology after processing. A fine equiaxed grain structure can be obtained in the processed zone, which causes a higher hardness of HV 135. 6, 1. 4 times as large as the base metal at the center of the processed zone, and the highest hardness of HV 312. 8 in the surface. The ultimate tensile strength of processed samples with and without the surface fine-grained layer increases by 50. 9% and 47. 6% compared to that of the base material, respectively. The both fracture surfaces of samples before and after friction stir processing exhibit dimple ductile fracture characterization. Grain refinement is considered to be the main reason for improving the ultimate tensile strength.关键词
IF钢/搅拌摩擦加工/显微组织/力学性能Key words
IF steel/friction stir processing/microstructure/mechanical properties分类
金属材料引用本文复制引用
赵凯,王快社,郝亚鑫,王文,徐瑞琦..搅拌摩擦加工IF钢的组织性能[J].工程科学学报,2015,37(12):1575-1580,6.基金项目
国家自然科学基金联合基金资助项目(U1360105) （U1360105）
