ABSTRACT The influence of die wall lubrication on the green strength and the tensile properties of a 1.5%Mo and 0.5%C steel, both as sintered and sinterhardened at 1250°C was investigated. Samples compacted using die wall lubrication had green strengths more than 100% higher than samples compacted at the same pressure using bulk lubrication, and a sintered density up to 98% of the pore-free ones may be achieved, compared to a maximum of 95% with bulk lubrication. Pore morphology and the matrix microstructure and microhardness were not affected. The tensile properties of both sintered and sinterhardened materials were much better for die wall lubrication than for bulk lubrication. Tensile strength increased up to 20%, tensile elongation up to 60%. The effectiveness of the system that delivers the lubricant on the die wall surface every stroke was verified successfully in the production of tensile specimens that do not have an axisymmetric geometry.

中文翻译：

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模具壁润滑对高温烧结烧结低合金钢拉伸性能的影响

摘要 研究了模具壁润滑对 1.5% Mo 和 0.5% C 钢（在 1250°C 下烧结和烧结硬化）的生坯强度和拉伸性能的影响。使用模具壁润滑压实的样品的生坯强度比使用整体润滑在相同压力下压实的样品高 100% 以上，并且烧结密度可达到无孔样品的 98%，而最高为 95%带大量润滑。孔隙形态和基体显微组织和显微硬度不受影响。与整体润滑相比，烧结和烧结硬化材料的拉伸性能对于模具壁润滑要好得多。抗拉强度提高可达20%，拉伸伸长率可达60%。