带涂层预成型焊片,自动压延,自动涂布,自动成型,实现自动化批量生产,自动开发助焊剂涂层可以满足不同的金属材料焊接.
常用预成型焊片合金
Liquidus 液相线℃ | Solidus 固相线℃ | 成分 Composition | 质密度 Mass density (mg/cm%) | 导电性 Conductivity W/cm℃ | “热膨胀 Thermal expansion W/cm℃ @ 85℃ | 抗拉强度 Tensile Strength(PSI)
|
118 | 118 | 52ln 24Sn | 7.3 | 11.7 | 0.34 | 20 |
138 | 138 | 58Bi 42Sn | 8.56 | 4.5 | 0.19 | 15 |
143 | 143 | 97ln 3Ag | 7.38 | 23 | 0.73 | 22 |
154 | 149 | 80ln 15Pb 5Ag | 7.85 | 13 | 0.43- | 28 |
218 | 217 | SAC305 | 7.4 | 16 | 0.3 | 29 |
167 | 154 | 70Sn 18Pb 12ln | 7.79 | 12.2 | 0.45 | 24 |
175 | 165 | 70ln 30Pb | 8.19 | 8.8 | 0.38 | 28 |
179 | 179 | 62Sn 36Pb 2Ag | 8.41 | 11.9 | 0.5 | 27 |
181 | 173 | 60ln 40Pb | 8.52 | 7 | 0.29 | 27 |
183 | 183 | 63Sn 37Pb | 8.4 | 11.5 | 0.5 | 25 |
210 | 184 | 50ln50Pb | 8.86 | 6 | 0.22 | 27 |
221 | 221 | 96.5Sn3.5Ag | 7.36 | 16 | 0.33 | 30.2 |
232 | 232 | 100Sn | 7.28 | 15.6 | 0.73 | 24 |
260 | 240 | 75Pb 25ln | 9.97 | 4.6 | 0.18 | 26 |
280 | 280 | 80Au 20Sn | 14.51 | --- | 0.57 | 16 |
预成型焊片储存用奉命
将预成型焊片储存环境在相对湿度低于55%,温度应低于22℃。储存时间为1年,但铅含量高于70%的合金储存时间为6个月。
The solder performs should be stored under the environment with relative humidity lower than55%, and temperature lower than 22℃. Normally one year storage time, but those alloy with lead content over 70% could only be stored for 6 monthes.
带涂层助焊剂合金的优点:
工艺不变,免去传统人工涂覆助焊剂;
2.预涂助焊剂性能一致性好;
3.焊接空洞率极低,抗拉强度高;
4.焊接免清洗,残留极低;
5.提升产品良率,降低产品报废率。