線材直徑d:mm | 兩夾頭之間標(biāo)距l(xiāng):mm | 鉗口的深度h:mm |
試樣長度L=l+2h |
<1.0 | l=200d | 30 | 200d+60 |
1.0~<5.0 | l=100d | 30 | 100d+60 |
5.0~ 10.0 | l=50d | 30 | 50d+60 |
>10.0 | l=22d | 40 | 22d+80 |
線材直徑d |
單向扭轉(zhuǎn)次數(shù) r/min |
雙向扭轉(zhuǎn)次數(shù) r/min |
||
鋼 | 銅及銅合金 | 鋁及鋁合金 | ||
<1.0 | 180 | 300 | 60 | 60 |
1.0~<1.5 | 60 | 120 | 60 | 60 |
1.5~<3.0 | 60 | 90 | 60 | 60 |
3.0~<3.6 | 60 | 60 | 60 | 60 |
3.6~<5.0 | 30 | 60 | 60 | 60 |
5.0~10.0 | 30 | 30 | 60 | 30 |
>10.0 | 2~6 | 2~6 | 2~6 | 2~6 |
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