1.根據(jù)工件材質(zhì)及處理方法,選用適當?shù)妮d物臺.壓痕器及執(zhí)行荷壓.
2.正轉(zhuǎn)荷壓系統(tǒng)
3.將測試工件置於載物臺上.
4.旋轉(zhuǎn)手輪使工件接觸壓痕器並至錶盤指針旋轉(zhuǎn)2圈歸零.
5.荷壓時間:硬質(zhì)工件5~10秒,軟質(zhì)工件15~30秒
6.逆轉(zhuǎn)荷壓系統(tǒng)(釋放主荷壓).
7.迅速正轉(zhuǎn)荷壓系統(tǒng).
8.讀取硬度值:
(A)測試HRF、HRB、HRG時讀取紅色刻度值.
(B)測試HRA、HRD、HRC時讀取黑色刻度值.
附1:測試種類.壓痕器.荷壓對照表:
壓痕器 荷壓 | 鑽石 | 1/16" | 1/8" | 1/4" | 1/2" |
60kg | HRA | HRF | HRH | HRL | HRR |
100kg | HRD | HRB | HRE | HRM | HRS |
150kg | HRC | HRG | HRK | HRP | HRV |
附2:我司常用材料及壓痕器荷壓選擇:
1).HRF(鋁 材),壓痕器1/16",荷壓(主荷)60kg, 指標轉(zhuǎn)兩圈歸“0",讀紅色刻度值.
2).HRB(鐵板.鐵卷),壓痕器1/16",荷壓(主荷)100kg,指標轉(zhuǎn)兩圈歸“0",讀紅色刻度值.
3).HRA(鐵板.鐵卷熱處理)壓痕器鑽石,荷壓(主荷)100kg,指針轉(zhuǎn)兩圈歸“0"讀黑色刻值.
4).HRC(模具 經(jīng)過熱處理)壓痕器鑽石,荷壓(主荷)150kg,指針轉(zhuǎn)兩圈歸“0"讀黑色刻值.
附3:硬度換算對照表:
HRB | HRF | VB |
| 40-44 | 4 |
| 45-49 | 5 |
| 50-53 | 6 |
1 | 54-57 | 7 |
2-8 | 58-61 | 8 |
9-16 | 62-65 | 9 |
20-23 | 66-69 | 10 |
24-29 | 70-73 | 11 |
30-36 | 74-77 | 12 |
37-43 | 78-81 | 13 |
44-51 | 82-86.5 | 14 |
52-58 | 87-90.5 | 15 |
59-64 | 91-94 | 16 |
65-72 | 94.5-97.5 | 17 |
73-79 | 98-102.5 | 18 |
