- 制造电光源和电真空零件
- 用作高温发热体和高温结构零件
- 用来制作真空蒸镀用的钨螺旋
钨丝表面涂有石墨乳,呈较均匀的黑色,去掉石墨乳呈金属光泽。
牌号 |
钨含量 |
杂质元素含量 |
|
总含量 |
每个元素含量 |
||
WAL1、WAL2 |
≥99.95% |
≤0.05% |
≤0.01% |
W1 |
≥99.95% |
≤0.05% |
≤0.01% |
W2 |
≥99.92% |
≤0.08% |
≤0.01% |
注:钾不作为杂质含量 |
直径(μm) |
200mm丝段重量 |
200mm丝段重量公差(%) |
直径公差(%) |
||||
0级 |
Ⅰ级 |
Ⅱ级 |
0级 |
Ⅰ级 |
Ⅱ级 |
||
5≤d≤12 |
0.075~0.44 |
- |
±4 |
±5 |
- |
- |
- |
12 |
>0.44~0.98 |
- |
±3 |
±4 |
- |
- |
- |
18 |
>0.98~4.85 |
±2 |
±2.5 |
±3 |
- |
- |
- |
40 |
>4.85~19.39 |
±1.5 |
±2.0 |
±2.5 |
- |
- |
- |
80 |
>19.39~272.71 |
±1.0 |
±1.5 |
±2.0 |
- |
- |
- |
300 |
>272.71~371.79 |
- |
±1.0 |
±1.5 |
- |
- |
- |
350 |
- |
- |
±1.5 |
±2.0 |
±2.5 |
||
500 |
- |
- |
±1.0 |
±1.5 |
±2.0 |