组装结构优化对PCBN聚晶层厚度差均匀性及稳定性的影响

通过优化PCBN复合片合成时组装结构中的盐管厚度及中间垫片材料，分别探究未优化(A)、中间垫片材料优化(B)、盐管厚度优化(C)及中间垫片和盐管厚度二者共同优化(D)4种情况下合成的PCBN聚晶层厚度差、聚晶层同一位置的硬度及其整体耐磨性的影响。结果表明:当盐管厚度由1.0 mm变为1.4 mm、中间垫片材料由石墨变为硬质合金时，4种情况下的PCBN复合片聚晶层同一位置硬度及其整体耐磨性基本不变。在显著性水平为0.05时, B、C、D优化相对A，D优化相对于单一因素的B和C优化，均能改善聚晶层厚度差的均匀性；B、C、D优化相对A，D优化相对于C优化，均能改善聚晶层厚度差的稳定性，但D优化相对于B优化，对聚晶层厚度差的稳定性无改善。 

Influence of assembly structure optimization on thickness difference uniformity and stability of PCBN polycrystalline layer

By optimizing the thickness of salt tube and the material of intermediate gasket in the assembly structure of PCBN composite layer, the effects of the thickness difference, the hardness of the same position and the overall wear resistance of the polycrystalline layer were investigated under the four conditions of no optimization (A), optimization of intermediate gasket material (B), optimization of salt tube thickness (C) and joint optimization of the intermediate gasket and the thickness of salt tube (D). The results show that when the thickness of salt tube changes from 1.0 mm to 1.4 mm, and the intermediate gasket material changes from graphite to cemented carbide, the hardness and overall wear resistance of the polycrystalline layer of PCBN composite are basically unchanged under the four conditions. At the significance level of 0.05, B, C, D optimization relative to A, D optimization compared to a single factor B and C optimization, can improve the uniformity of the thickness difference of polycrystalline layer. The optimization of B, C, and D is relative to that of A, and the optimization of D is relative to that of C, which can improve the stability of the thickness difference of the polycrystalline layer. However, the D optimization compared with the B optimization does not improve the stability of the thickness difference of the polycrystalline layer.