粉末冶金静电模壁润滑中复合润滑剂的静电荷电与润滑特性

Eloctrostatic and Lubricant Performances of Compound Lubricants in P/M Elec-trostatic Die Wall Lubrication

实验研究了在粉末冶金静电模壁润滑技术中复合润滑剂——50％EBS蜡+50％石墨,50％EBS蜡+50％BN(质量分数)的静电荷电与润滑特性.结果表明:BN的加入能改善EBS蜡的荷电性能,而石墨的加入却使其变差;50％EBS蜡+50％石墨混合粉润滑效果极好,能获得相当高的压坯密度,而50％EBS蜡+50％BN混合粉的效果却要差得多;模具温度为150℃(超过EBS蜡熔点)时,50％EBS蜡+50％E墨混合粉润滑效果变差,而50％EBS蜡+50％BN混合粉则影响不大.

The electrostatic and lubricant performances of compound lubricants -50% EBS wax + 50% graphite and 50% EBS wax + 50% BN in P/M electrostatic die wall lubrication were investigated. The results show that the addition of BN can improve the charging performance of EBS wax, while graphite makes it worse. The combination of 50% EBS wax and 50% graphite exhibits excellent lubricant performance, resulting in a fairly high green density, but the mixture of 50% EBS wax and 50% BN has less beneficial effect. When the mold temperature is 150℃, which is above the melting point of EBS wax, the lubricant performance of the 50% EBS wax + 50% graphite becomes worse, while the 50% EBS wax + 50% BN is little influenced.