金屬拉伸試驗采樣的時候不宜過長也不宜過寬，只有長寬都符合拉伸試驗的標(biāo)準(zhǔn)那么測試的結(jié)果才能更加。下面蘇州力高檢測通過分析金屬試驗的厚度、寬度、過渡半徑、原始標(biāo)距、平行長度、試樣總長度來截取金屬試樣。由于不同的檢測儀器它的金屬試樣截取方式不同，因此以下截取金屬材料試樣是根據(jù)電子材料拉力試驗機(jī)的標(biāo)準(zhǔn)為依據(jù)的。
一：標(biāo)準(zhǔn)的金屬試樣類型及尺寸結(jié)構(gòu)圖如下：
金屬試樣截取結(jié)構(gòu)圖
a：金屬試樣厚度、b：金屬試樣寬度、r：金屬試樣過渡半徑、L0：試樣原始標(biāo)距(計算公式：L0=k×S0 )、B：夾具寬度、h：上下夾具間高度、h1：夾具與試樣的距離高度、L：上下夾具總高度(計算公式：L=L0+2×h1+2×h)。
二：截取標(biāo)準(zhǔn)金屬試樣統(tǒng)計表：
| 編號 | 厚度a | 寬度b | 過渡半徑r | 原始標(biāo)距L0 | 平行長度L | 總長度L | B | h1 | h |
| 1 | 0.6mm | 15mm | ≥15mm | 20.15mm | 61.10mm | 180mm | 30mm | ≥14.05 | 52mm |
| 2 | 0.65mm | 15mm | ≥15mm | 21.52mm | 61.80mm | 180mm | 30mm | ≥14.05 | 52mm |
| 3 | 0.7mm | 15mm | ≥15mm | 22.52mm | 62.60mm | 180mm | 30mm | ≥14.05 | 52mm |
| 4 | 0.75mm | 15mm | ≥15mm | 23.52mm | 63.30mm | 180mm | 30mm | ≥14.05 | 52mm |
| 5 | 0.8mm | 15mm | ≥15mm | 23.5mm | 63.90mm | 190mm | 30mm | ≥14.05 | 52mm |
| 6 | 0.85mm | 15mm | ≥15mm | 24.5mm | 64.60mm | 1905mm | 30mm | ≥14.05 | 52mm |
| 7 | 0.9mm | 15mm | ≥15mm | 25.57mm | 65.20mm | 190mm | 30mm | ≥14.05 | 52mm |
| 8 | 0.95mm | 15mm | ≥15mm | 27.58mm | 67.60mm | 190mm | 30mm | ≥14.05 | 52mm |
| 9 | 1.0mm | 15mm | ≥15mm | 30.55mm | 70.90mm | 195mm | 30mm | ≥14.05 | 52mm |
| 10 | 1.5mm | 15mm | ≥15mm | 35.53mm | 75.70mm | 205mm | 30mm | ≥14.05 | 52mm |
| 11 | 2.0mm | 15mm | ≥15mm | 37.52mm | 77.90mm | 205mm | 30mm | ≥14.05 | 52mm |
| 12 | 2.5mm | 15mm | ≥15mm | 37.55mm | 79.90mm | 210mm | 30mm | ≥14.05 | 52mm |
| 13 | 3.0mm | 15mm | ≥15mm | 43.56mm | 59.20mm | 190mm | 30mm | ≥14.05 | 52mm |
| 14 | 4.0mm | 15mm | ≥15mm | 54.52mm | 68.40mm | 200mm | 30mm | ≥14.05 | 52mm |
| 15 | 6.0mm | 15mm | ≥15mm | 61.59mm | 83.80mm | 215mm | 30mm | ≥14.05 | 52mm |
三：截取金屬試樣時的注意點(diǎn)：
1:我們應(yīng)該優(yōu)先考慮比例為K=5.50的試樣，如果比例標(biāo)距＜15mm，那么我們可以采用非比例樣式。
2：金屬試樣的頭部寬度要在15mm和35mm之間。
3：平行長度不應(yīng)＜L0+b/2。
