22MnB5超高强度钢-纤维复合材料的制备及力学性能研究

Preparation and Mechanical Properties of 22MnB5 Ultra High Strength Steel-Fiber Composites

基于丙酮清洗、喷砂和磷化处理,研究了不同表面处理对超高强度钢表面粘接性能的影响;在此基础上选取22MnB5钢为金属层、单向碳纤维-7091环氧树脂为纤维层,成功制备了超高强度钢-纤维复合层板,并开展了其力学性能研究。研究结果表明:表面处理可以显著改变影响金属层和纤维层的粘接性能,其中喷砂后磷化10 min的处理对表面处理的影响最为显著。所制备的超高强度钢-纤维复合层板,单向层板的抗拉强度为1024.20 MPa,正交层板为1022.99 MPa,因超高强度钢本身强度较大,纤维铺层对材料性能的影响不显著,所制备的超高强度钢-纤维复合层板,其抗拉强度与MVF理论的计算值不相符,表明层板的界面结合强度需要进一步的提高。

Based on acetone cleaning, sand blasting and phosphatizing, the effects of different surface treatments on the adhesion properties of ultra high strength steel were studied. On this basis, 22MnB5 steel was selected as metal layer and unidirectional carbon fiber -7091 epoxy resin as fiber layer. The ultra high strength steel - fiber composite laminates were successfully prepared and their mechanical properties were studied. The results show that surface treatment can significantly change the adhesion properties of metal and fiber layers, and 10min phosphatizing after sand blasting has the most significant effect on the surface treatment. The tensile strength of unidirectional laminate is 1024.20 MPa, and that of orthogonal laminate is 1022.99 MPa. Due to the high strength of ultra high strength steel, the influence of fiber layer on material properties is not significant. The tensile strength of the ultra high strength steel - fiber composite laminates is not consistent with the calculated value of MVF theory, indicating that the interface bonding strength of the laminates needs to be further improved.