通过布氏硬度试验，研究了测量标尺对不同焊接工艺Inconel 625镍基合金管接头焊缝压痕形貌和布氏硬度的影响。结果表明：在不同测量标尺条件下，堆焊镍基合金管接头焊缝的布氏硬度压痕边缘较为光滑平顺；在HBW 5/750和HBW 2. 5/187. 5测量标尺条件下，手把焊和氩弧焊镍基合金管接头焊缝的布氏硬度压痕形状趋向于圆形；在同一载荷与压头直径平方的比值条件下，采用不同测量标尺测得的布氏硬度基本相同；对于堆焊镍基合金管接头，建议采用HBW 10/300测量标尺；对于手把焊和氩弧焊镍基合金管接头，建议采用HBW 5/750测量标尺。

Through the Brinell hardness test, the influence of measuring scale on the indentation morphology and Brinell hardness of the weld of Inconel 625 nickel-based alloy pipe joint with different welding processes was studied. The results showed that under different measuring scale conditions, the edge of Brinell hardness indentation in weld of nickel-based alloy pipe joint was relatively smooth. Under the conditions of HBW 5/750 and HBW 2. 5/187. 5 measuring scales, the shape of Brinell hardness indentation in weld of handle welding and argon arc welding nickel-based alloy pipe joints tended to be round. Under the condition of the same ratio of load to square of diameter of the indenter, the Brinell hardness measured by different measuring scales were basically same. For surfacing nickel-based alloy pipe joint, it was recommended to use HBW 10/300 measuring scale. For handle welding and argon arc welding nickel-based alloy pipe joint, it was recommended to use HBW 5/750 measuring scale.