十一、测量范围表:
材料 | 硬度制 | 冲击装置 | |||||
D/DC | D+15 | C | G | E | DL | ||
Steel and cast steel 钢和铸钢 | HRC | 17.9~68.5 | 19.3~67.9 | 20.0~69.5 | | 22.4~70.7 | 20.6~68.2 |
HRB | 59.6~99.6 | | | 47.7~99.9 | | 37.0~99.9 | |
HRA | 59.1~85.8 | | | | 61.7~88.0 | | |
HB | 127~651 | 80~638 | 80~683 | 90~646 | 83~663 | 81~646 | |
HV | 83~976 | 80~937 | 80~996 | | 84~1042 | 80~950 | |
HS | 32.2~99.5 | 33.3~99.3 | 31.8~102.1 | | 35.8~102.6 | 30.6~96.8 | |
Steel锻钢 | HS | 32.2~99.5 | | | | | |
CWT、ST 合金工具钢 | HRC | 20.4~67.1 | 19.8~68.2 | 20.7~68.2 | | 22.6~70.2 | |
HV | 80~898 | 80~935 | 100~941 | | 82~1009 | | |
Stainless steel 不锈钢 | HRB | 46.5~101.7 | | | | | |
HB | 85~655 | | | | | | |
HV | 85~802 | | | | | | |
GC. IRON 灰铸铁 | HRC | | | | | | |
HB | 93~334 | | | 92~326 | | | |
HV | | | | | | | |
NC、IRON 球墨铸铁 | HRC | | | | | | |
HB | 131~387 | | | 127~364 | | | |
HV | | | | | | | |
C.ALUM 铸铝合金 | HB | 19~164 | | 23~210 | 32~168 | | |
HRB | 23.8~84.6 | | 22.7~85.0 | 23.8~85.5 | | | |
BRASS 铜锌合金 | HB | 40~173 | | | | | |
HRB | 13.5~95.3 | | | | | | |
BRONZE铜锡(铝)合金 | HB | 60~290 | | | | | |
COPPER纯铜 | HB | 45~315 | | | | | |
异型冲击装置 | DC(D)/DL | D+15 | C | G | E | |||||
冲击能量冲击体质量 | 11mJ5.5g/7.2g | 11mJ7.8g | 2.7mJ3.0g | 90mJ20.0g | 11mJ5.5g | |||||
球头硬度:球头直径:球头材料: | 1600HV3mm碳化钨 | 1600HV3mm碳化钨 | 1600HV3mm碳化钨 | 1600HV5mm碳化钨 | 5000HV3mm金刚石 | |||||
冲击装置直径:冲击装置长度:冲击装置重量: | 20mm 86(147)/ 75mm 50g | 20mm162mm80g | 20mm141mm75g | 30mm254mm250g | 20mm155mm80g | |||||
试件大硬度 | 940HV | 940HV | 1000HV | 650HB | 1200HV | |||||
试件表面平均粗糙度Ra: | 1.6μm | 1.6μm | 0.4μm | 6.3μm | 1.6μm | |||||
试件小重量:可直接测量需稳定支撑需密实耦合 | >5kg2~5kg0.05~2kg | >5kg2~5kg0.05~2kg | >1.5kg0.5~1.5kg0.02~0.5kg | >15kg5~15kg0.5~5kg | >5kg2~5kg0.05~2kg | |||||
试件小厚度密实耦合硬化层小深度 | 5mm≥0.8mm | 5mm≥0.8mm | 1mm≥0.2mm | 10mm≥1.2mm | 5mm≥0.8mm | |||||
球头压痕尺寸 | ||||||||||
硬度300HV时 | 压痕直径压痕深度 | 0.54mm24μm | 0.54mm24μm | 0.38mm12μm | 1.03mm53μm | 0.54mm24μm | ||||
硬度600HV时 | 压痕直径压痕深度 | 0.54mm17μm | 0.54mm17μm | 0.32mm8μm | 0.90mm41μm | 0.54mm17μm | ||||
硬度800HV时 | 压痕直径压痕深度 | 0.35mm10μm | 0.35mm10μm | 0.35mm7μm | ---- | 0.35mm10μm | ||||
冲击装置适用范围 | DC型测量孔或园柱筒内;DL型测量细长窄槽或孔;D型用于常规测量 | D+15型接触面细小,加长,适宜测量沟槽或凹入的表面 | C型冲击力小,对被测表面损伤很小,不破坏硬化层,适合测量小轻薄部件及表面硬化层。 | G型测量大厚重及表面较粗糙的铸锻件 | E型测量硬度*材料 |
序号 | 冲击装置类型 | 标准里氏硬度块硬度值 | 示值误差 | 示值重复性 |
1 | D | 760±30HLD | ±6 HLD | 6 HLD |
2 | DC | 760±30HLDC | ±6 HLDC | 6 HLD |
3 | DL | 878±30HLDL | ±12 HLDL | 12 HLDL |
4 | D+15 | 766±30HLD+15 | ±12 HLD+15 | 12 HLD+15 |
5 | G | 590±40HLG | ±12 HLG | 12 HLG |
6 | E | 725±30HLE | ±12 HLE | 12 HLE |
7 | C | 822±30HLC | ±12 HLC | 12 HLC |