Abstract—

The results of a study on the influence of the modes of obtaining sintered BrO12 bronze on its structure, phase composition and tribological properties during friction with a lubricant are presented. It is shown that the phase composition of BrO12 bronze sintered for 5 min consists of a solid solution of tin in copper and inclusions of intermetallic phases δ-Cu41Sn11 and Cu81nSn22. An increase in the exposure time during sintering leads to an increase in the homogeneity of the solid solution of tin in copper, a decrease in the crystal lattice parameter of copper from 3.69 to 3.68 Å, an increase in the grain size from 2–5 µm at 5 min of sintering to 15–46 µm at 120 min, a decrease in the content of the intermetallic phase δ-Cu41Sn11, and the disappearance of the Cu81nSn22 phase at 60 min of sintering and the virtual absence of intermetallic compounds after sintering for 120 min. Tribological tests have shown that the friction coefficient of bronze sintered for 5 min at a pressure of 4 MPa varies from 0.08 to 0.03, and at 20 MPa, from 0.105 to 0.04, the average wear value at a pressure of 4 MPa and 20 MPa was 2.0 µm. The coefficient of friction at the above pressures of bronze sintered for 60 min was 0.11–0.036 and 0.095–0.023; 0.045 and 0.12–0.5, respectively, wear was 6.3 µm.

中文翻译：

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生产方式对烧结锡青铜在摩擦单元与润滑剂摩擦时组织和摩擦学性能的影响

摘要-

介绍了获得烧结 BrO12 青铜的方式对其结构、相组成和与润滑剂摩擦时的摩擦学性能的影响的研究结果。结果表明，烧结5 min的BrO12青铜的物相组成为锡在铜中的固溶体和金属间相δ-Cu41Sn11和Cu81nSn22夹杂物。烧结过程中暴露时间的增加导致锡在铜中固溶体的均匀性增加，铜的晶格参数从3.69 Å降低到3.68 Å，晶粒尺寸从2–5 µm增加烧结 5 分钟时，120 分钟时厚度达到 15-46 µm，金属间相 δ-Cu41Sn11 含量下降，烧结 60 分钟时 Cu81nSn22 相消失，烧结 120 分钟后几乎不存在金属间化合物。分钟。摩擦学试验表明，在4 MPa压力下烧结5 min的青铜摩擦系数在0.08~0.03之间变化，在20 MPa压力下烧结5 min，摩擦系数在0.105~0.04之间变化，4 MPa和20 MPa压力下的平均磨损值为2.0 微米。烧结60 min的青铜在上述压力下的摩擦系数分别为0.11~0.036和0.095~0.023；分别为 0.045 和 0.12–0.5，磨损量为 6.3 µm。