TROJAN (Suzhou) Technology Co., Ltd.
TROJAN (Suzhou) Technology Co., Ltd.
Metallographic Preparation of Copper Enameled Wire
2022-07-29
Copper enameled wire is a new type of synthetic high-performance bimetallic wire that has developed rapidly in recent years, It is a new type of pure copper core cable replacement product vigorously promoted by the country. It is widely used in communication cables, coaxial cables, radio frequency cables, data cables, computer cables, electromagnetic wires and power transmission lines and many other fields. The project has great market potential.
01 Equipment and consumables
| Equipment | Trojan TableCUT-200 automatic precision cut-off machine; Trojan Alpha-600 automatic grinder&polisher; Trojan ThetaMount pressure cold mounting machine; MN 60 series microscope; Hairdryer; |
| Consumables | Degreasing cotton;Transparent triangle clamp; Trojan TJ2562AB epoxy resin; |
02 Sample preparation process
1-Cutting
Cut the machine with TableCUT-200 automatic precision cut-off machine.TableCUT-200 automatic precision cut-off machine
| Equipment | TableCUT-200 automatic precision cut-off machine |
| Consumables | SiC cutting disc |
| Parameter | Speed:2500rpm,Feeding speed :0.2mm/s |
2-Mounting
After cleaning the sample with ultrasonic waves, the sample is placed upright in a silicone mold with a transparent triangular clamp, and TJ2562AB epoxy resin is prepared in proportion to mount the sample.
3-Grinding
Grind the specimen with Alpha -600 automatic grinder&polisher, abrasive paper P400→P2500
Alpha-600 automatic grinder&polisher
metallographic abrasive paper
| Equipment | Alpha-600 automatic grinder&polisher |
| Consumables | Abrasive paper:P400→P2500 |
| Parameter | Upper disc:100rpm,lower disc:200rpm,same direction;pressure:15N |
4-Polishing(plane polishing)
Polish the specimen with Alpha-600 automatic grinder&polisher, use SC polishing cloth with 3 μm polycrystalline diamond suspensionfor plane polishing. Note to add PL-W polishing lubricant for polishing.
SC-JP white natural silk polishing cloth
PD-W polycrystalline diamond suspension
PL-W polishing lubricant
| Equipment | Alpha-600 automatic grinder&polisher |
| Consumables | SC polishing cloth,3μm polycrystalline diamond suspension,PL-W polishing lubricant |
| Parameter | Pressure:20N,same direction speed:150rpm,time:5min |
4-Polishing(fine polishing)
Polish the specimen with Alpha-600 automatic grinder&polisher, use FR polishing cloth with 0.05μm alumina suspension mixed non-crystallizing silica suspension for fine polishing.(Add 25% ammonia water and 3% hydrogen peroxide to the silica suspension)
Final Red final precision polishing cloth
AO-P alumina suspension
Non-crystallizing silica
| Equipment | Alpha-600 automatic grinder&polisher |
| Consumables | Final Red polishing cloth,0.05μm alumina suspension,0.05μm non-crystallizing suspension |
| Parameter | Alumina polishing:same direction speed 150rpm,time 60s;silica polishing:same direction speed 120rpm,time 120s. |
5- Observation
| Equipment | MN 60 series microscope |
| Consumables | |
| Parameter | 50×→500× |
03 Analysis
Φ1.45mm- 50×
The preparation of enameled wire samples can be done quickly and with high quality using the Alpha-600 automatic grinder&polisher. The equipment has good reproducibility and high preparation efficiency.
The edge of the specimen mounting with epoxy resin and the enamel layer of the enameled wire are well bonded without gaps.
If only looking at the paint layer, consider whether a final silica polishing step is required depending on the desired image quality.
