The influence of ground R6M5K5 tool steel powder in mixture with gas-atomized powder on the process properties of the powder mixtures was studied. Both powders were sifted through a 50 μm sieve. The ground powder was present in amounts of 0, 10, 20, 30, 40, 50, and 100%. The bulk density, tapped density, flowability, and repose angle of the powder mixtures were determined. Additionally, the Carr index, Hausner ratio, and flow rate were calculated. The bulk density exhibited minimal changes because of a high content of near-spherical particles in the ground powder. The flowability of the mixtures decreased with increasing content of the ground powder (flow time for the standard weighed sample increased). Grinding the powder resulted in reduction of its flowability by nearly 35%. The flowability of the gas-atomized powder was 22.49 sec/50 g. When the mixtures contained 50% ground powder, the flowability became 25.72 sec/50 g, representing a decrease of 14%. The linear fitting of the dependencies relating the bulk density (BD), flowability (τ), and flow rate (V) to the ground powder content (weight percent) in mixture with the gas-atomized powder (X) provided the following results with a high coefficient of determination (R²): BD = 4.52 – 0.0043X (R² = 0.98), τ = 23.48 + 0.07X (R² = 0.95), and V = 36.32 – 0.012X (R² = = 0.97). The linear dependence of the relative bulk density (expressed in percentage) on the ground powder content demonstrated that the effect from the amount of ground powder could be assessed using the slope angle of the dependence on the abscissa axis. The slope angle of the dependence is less than 1 deg, indicating a very weak effect of the ground powder content on the relative bulk density of the powder mixtures.

研究了研磨R6M5K5工具钢粉末与气雾化粉末的混合物对粉末混合物工艺性能的影响。两种粉末均通过 50 μm 的筛子过筛。研磨粉末的存在量为0%、10%、20%、30%、40%、50%和100%。测定粉末混合物的堆密度、振实密度、流动性和安息角。此外，还计算了卡尔指数、豪斯纳比和流速。由于研磨粉末中近球形颗粒的含量较高，因此堆积密度变化最小。混合物的流动性随着研磨粉末含量的增加而降低（标准称重样品的流动时间增加）。研磨粉末导致其流动性降低近 35%。气雾化粉末的流动性为22.49秒/50g。当混合物含有50%研磨粉末时，流动性变为25.72秒/50g，下降了14%。堆积密度 (BD)、流动性 (τ) 和流速 (V) 与与气雾化粉末 (X) 混合的研磨粉末含量（重量百分比）的相关性的线性拟合提供了以下结果：高决定系数 (R ² )：BD = 4.52 – 0.0043X (R ² = 0.98)，τ = 23.48 + 0.07X (R ² = 0.95)，V = 36.32 – 0.012X (R ² = = 0.97) 。相对堆积密度（以百分比表示）对研磨粉末含量的线性依赖性表明，可以使用与横坐标轴的依赖性的斜角来评估研磨粉末量的影响。相关性的斜角小于1°，表明研磨粉末含量对粉末混合物的相对堆积密度的影响非常弱。