激光熔覆制備TC4基復合藥型罩材料的力學性能

激光熔覆制備TC4基復合藥型罩材料的力學性能Mechanical Properties of TC4 Matrix Composites Prepared by Laser Cladding

為了提高TC4藥型罩的侵徹性能，將激光熔覆制備工藝用于TC4復合藥型罩材料的制備。選用TA15+30 %（質量分數，下同）TiC粉、TA15+20 %Cr3C2粉和TA15+15 %B4C粉作為TC4基體的熔覆材料。采用XRD、掃描電鏡和顯微硬度測試、準靜態(tài)壓縮實驗、SHPB動態(tài)壓縮實驗以及3點彎曲實驗方法，研究熔覆層與基體界面處微觀形貌、熔覆層硬度變化情況以及3種復合材料的力學性能。結果表明：TC4基體與3種材料都能形成完全冶金結合，TC4-（TA15+TiC），TC4-（TA15+Cr3C2）和TC4-（TA15+B4C）材料的強度均高于TC4基體材料，塑性略差；TC4-（TA15+TiC），TC4-（TA15+Cr3C2）材料的抗彎強度分別為168 MPa，101 MPa，均高于TC4基體材料的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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