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电缆铅护套间断式挤压生产被连续挤压式生产代替后,连续挤压性能的好坏,不但与电缆护套铅合金成份有关,而且与其组织有很大关系,本文运用电子探针分析(EPMA)研究了电缆护套铅合金(HTPbsb—1,含锑0.4～0.6％,含铜0.03—0.06％,余量为铅),以便为改善电缆护套铅合金的连续挤压性能提供理论依据。分析试样为经过270℃6小时退火后的铅合金。作了电子探针定量分析,并拍摄了扫描电镜照片。结果表明,电缆护套铅合金中存在有铜—锑相(照片2、3中a,b),铅—铜—锑相和近乎单质的铜相(照片3中c),近乎单质的锑相(照片4)。这些相大多呈不规则块状。其中铅—铜—锑相大部分无固定化
The continuous extrusion performance of the cable lead sheath intermittent extrusion production is replaced by the continuous extrusion production, which is not only related to the lead alloy composition of the cable sheathing, but also has a great relationship with its organization. In this paper, electron probe analysis (EPMA) to study the theory of cable sheathing lead alloy (HTPbsb-1, 0.4-0.6% of antimony, 0.03-0.06% of copper and the balance of lead) in order to improve the continuous extrusion performance of lead sheath in accordance with. The analysis sample was a lead alloy annealed at 270 ° C for 6 hours. Electron probe quantitative analysis was made and a scanning electron microscope photograph was taken. The results show that there are copper-antimony phase (photo 2,3a, b), lead-copper-antimony phase and almost elemental copper phase (photo 3 in c) (Photo 4). Most of these phases are irregular lumps. Most of the lead-copper-antimony phase is not immobilized