Results of research on high-temperature tension for powder steels by the Swedish company Höganäs are analyzed. Morphological differences in the structure through the cross-section of a cylindrical specimen, which is conventionally divided into central and peripheral areas, are revealed. Microstructural analysis and fractographic study of the fracture surface are performed in each area. These studies provide identification of areas of fractures having different relief in intercrystalline shears and their extent, which indicates the presence of areas on the surface of interparticle contact with different degrees of completion of interparticle fusion. It is shown that plastic flow is accompanied by formation of peripheral region material whose structure and properties depend on the degree of deformation and production conditions. As the peripheral region develops material strength properties decrease after reaching a critical amount of transverse flow. Mechanical properties of specimens prepared from the highest quality materials are studied in detail at high temperature. This provides a complete picture of the occurrence of microcracks and the potential for using the material under actual conditions.

瑞典 Höganäs 公司对粉末钢的高温张力研究结果进行了分析。通过圆柱形试样的横截面显示结构的形态差异，该横截面通常分为中心区域和外围区域。在每个区域进行断裂面的显微结构分析和断口研究。这些研究提供了在晶间剪切中具有不同起伏的裂缝区域及其范围的识别，这表明颗粒间接触表面上存在具有不同程度的颗粒间融合完成的区域。结果表明，塑性流动伴随着周边区域材料的形成，其结构和性能取决于变形程度和生产条件。随着外围区域的发展，材料强度特性在达到临界横向流动量后会降低。在高温下详细研究了由最高质量材料制备的试样的机械性能。这提供了微裂纹发生的完整图片以及在实际条件下使用材料的潜力。