Fe-powder and paraffin-based or similar systems are widely used for low-temperature injection molding. The main attention of research efforts on such compositions is focused on the study of their rheology. At the same time, such materials can be adapted for 3D printing by layer-by-layer surfacing, requiring only necessary rods or filaments with a sufficient level of mechanical properties so as not to break during printing. Hence, this paper examines the influence of paraffin content on the compressive strength of samples made of carbonyl iron powder and paraffin in the ratio: 50/50, 60/40, 70/30, and 80/20 vol.%. Computer calculations of critical deformation, elasticity modulus, and compressive strength of such composites have been performed. According to the examination and calculation results, the modulus of elasticity varies from 1358 to 113 MPa with a higher paraffin content, the critical deformation ranges between 0.257 and 3.310, and the compressive strength is between 0.339 and 0.761 MPa. Iron powder was mixed with paraffin in a planetary mill for 3 min with a subsequent sieving of the mixture. Afterward, pressed cylindrical samples with a volume of ~1 cm³ and a height of ~10 mm were used to determine the density and compressive strength. It was found that the density of the samples after pressing is 1.3 times lower than the calculated by the additivity formula at a binder content of 20 vol.%. Only when the binder content increases to 50 vol.%, the actual density approaches the calculated values, that is, the relative porosity varies from 0.212 to 0. With an increase in paraffin content from 20 to 50 vol.% the strength of the samples increases along the concave curve from 3 to 11 MPa. The dependences of the calculated and experimentally obtained compressive strength are similar, indicating the adequacy of the established models. However, significant variation in values is due to the difference between the properties of paraffin under study and that used for testing. Samples of rods with 40 and 60 vol.% Fe was extruded and tested by 3D printing. The obtained experimental data can be used in the creation of other similar working materials for 3D printing in the layer-by-layer surfacing.

铁粉和石蜡基或类似系统广泛用于低温注塑成型。对此类组合物的研究工作的主要重点是对其流变学的研究。同时，此类材料可通过逐层表面处理而适用于3D打印，仅需要具有足够机械性能水平的必要棒或细丝，以在打印过程中不会断裂。因此，本文以50 / 50、60 / 40、70 / 30和80/20 vol。％的比例研究了石蜡含量对由羰基铁粉和石蜡制成的样品的抗压强度的影响。已经进行了这种复合材料的临界变形，弹性模量和抗压强度的计算机计算。根据检查和计算结果，当石蜡含量较高时，弹性模量在1358至113 MPa之间变化，临界变形范围在0.257至3.310 MPa之间，抗压强度在0.339至0.761 MPa之间。将铁粉与石蜡在行星式磨机中混合3分钟，然后将混合物过筛。之后，压制圆柱形样品，体积约为1厘米³高度约为10毫米，用于确定密度和抗压强度。发现在20vol。％的粘合剂含量下，压制后的样品的密度比通过加和公式计算的密度低1.3倍。仅当粘合剂含量增加到50％（体积）时，实际密度才接近计算值，即相对孔隙度从0.212变为0。随着石蜡含量从20％（体积）增加到50％（体积），样品的强度也随之增加。沿凹曲线从3 MPa增加到11 MPa。计算得出的和通过实验获得的抗压强度的相关性相似，表明所建立模型的适当性。但是，值的显着差异是由于所研究的石蜡性质与用于测试的石蜡性质之间存在差异。挤出具有40％和60％（体积）铁的棒样品，并通过3D打印进行测试。所获得的实验数据可用于创建其他类似的工作材料，以进行逐层堆焊中的3D打印。