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通过调整不同的C、Cr含量,研究对K4648合金组织和力学性能的影响。热力学计算结果表明,K4648合金中主要平衡析出相为α-Cr、γ’相、M23C6碳化物,从合金组织中观察到多种形状的α-Cr及沿晶界析出的Cr23C6,其中α-Cr、γ’相的析出量随Cr含量的升高而增大,随C含量的升高而降低,C含量的升高有利于碳化物的形成,合金的室温拉伸性能、冲击性能均受成分的影响。
By adjusting the different C, Cr content, the study of the K4648 alloy microstructure and mechanical properties. The thermodynamic calculation results show that the main equilibrium precipitates in K4648 alloy are α-Cr, γ ’phase and M23C6 carbides. Various shapes of α-Cr and Cr23C6 precipitated along the grain boundaries are observed from the alloy microstructure. Among them, α-Cr , The precipitation amount of γ ’phase increases with the increase of Cr content and decreases with the increase of C content. The increase of C content is conducive to the formation of carbides. The room temperature tensile properties and impact properties of the alloy are affected by the composition Impact.