为了提高TC4药型罩的侵彻性能,将激光熔覆制备工艺用于TC4复合药型罩材料的制备.选用TA15+30 %(质量分数,下同)TiC粉、TA15+20 %Cr3C2粉和TA15+15 %B4C粉作为TC4基体的熔覆材料.采用XRD、扫描电镜和显微硬度测试、准静态压缩实验、SHPB动态压缩实验以及3点弯曲实验方法,研究熔覆层与基体界面处微观形貌、熔覆层硬度变化情况以及3种复合材料的力学性能.结果表明:TC4基体与3种材料都能形成完全冶金结合,TC4-(TA15+TiC),TC4-(TA15+Cr3C2)和TC4-(TA15+B4C)材料的强度均高于TC4基体材料,塑性略差;TC4-(TA15+TiC),TC4-(TA15+Cr3C2)材料的抗弯强度分别为168 MPa,101 MPa,均高于TC4基体材料的45 MPa.
In order to improve the penetration performance of TC4,the direct laser deposition technology was used to prepare TC4 composite material.TA15+30% TiC powder,TA15+20%Cr3C2 powder and TA15+15%B4C powder were used as deposited materials for TC4 matrix.The micromorphology,change of hardness of the deposited coating and mechanical properties of the three composites were studied.The experimental results demonstrate that the TC4 matrix with the three kinds of materials can form a complete metallurgical bonding,and the strength of TC4-(TA15+TiC),TC4-(TA15+Cr3C2) and TC4-(TA15+B4C) are higher than that of TC4 matrix materials,while the plasticity is slightly worse.
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