
里氏硬度計(jì)測(cè)試范圍(表一)
材料 | 硬度制 | 沖擊裝置 | |||||
D/DC | D+15 | C | G | E | DL | ||
Steel and cast steel 鋼和鑄鋼 | 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鍛鋼 | HS | 32.2~99.5 | | | | | |
CWT、ST 合金工具鋼 | 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 | | |
HRA | 60.7~92.6 | ||||||
HB | 232~625 | ||||||
Stainless steel 不銹鋼 | HRB | 46.5~101.7 | | | | | |
HB | 85~655 | | | | | | |
HV | 85~802 | | | | | | |
GC. IRON 灰鑄鐵 | HRC | | | | | | |
HB | 93~334 | | | 92~326 | | | |
HV | | | | | | | |
NC、IRON 球墨鑄鐵 | HRC | | | | | | |
HB | 131~387 | | | 127~364 | | | |
HV | | | | | | | |
C.ALUM 鑄鋁合金 | HB | 19~164 | | 23~210 | 32~168 | | |
HRB | 23.8~84.6 | | 22.7~85.0 | 23.8~85.5 | | | |
HV | 83.2~648.2 | ||||||
BRASS 銅鋅合金 | HB | 40~173 | | | | | |
HRB | 13.5~95.3 | | | | | | |
BRONZE銅錫(鋁)合金 | HB | 60~290 | | | | | |
COPPER純銅 | HB | 45~315 | | | | | |
示值誤差和示值重復(fù)性(表二)
異型沖擊裝置 | DC(D)/DL | D+15 | C | G | E |
沖擊能量 | 11mJ | 11mJ | 2.7mJ | 90mJ | 11mJ |
沖擊體質(zhì)量 | 5.5g/7.2g | 7.8g | 3.0g | 20.0g | 5.5g |
球頭硬度 | 1600HV | 1600HV | 1600HV | 1600HV | 5000HV |
球頭直徑 | 3mm | 3mm | 3mm | 5mm | 3mm |
球頭材料 | 碳化鎢 | 碳化鎢 | 碳化鎢 | 碳化鎢 | 金剛石 |
沖擊裝置直徑 | 20mm | 20mm | 20mm | 30mm | 20mm |
沖擊裝置長(zhǎng)度 | 75mm | 162mm | 141mm | 254mm | 155mm |
沖擊裝置重量 | 50g | 80g | 75g | 250g | 80g |
試件硬度 | 940HV | 940HV | 1000HV | 650HB | 1200HV |
試件表面平均粗糙度Ra | 1.6μm | 1.6μm | 0.4μm | 6.3μm | 1.6μm |
試件最小重量 | >5kg | >5kg | >1.5kg | >15kg | >5kg |
可直接測(cè)量需穩(wěn)定支撐 | 2~5kg | 2~5kg | 0.5~1.5kg | 5~15kg | 2~5kg |
歐譜硬度計(jì)需密實(shí)耦合 | 0.05~2kg | 0.05~2kg | 0.02~0.5kg | 0.5~5kg | 0.05~2kg |
試件最小厚度密實(shí)耦合 | 5mm | 5mm | 1mm | 10mm | 5mm |
硬化層最小深度 | ≥0.8mm | ≥0.8mm | ≥0.2mm | ≥1.2mm | ≥0.8mm |
硬度 | 壓痕直徑 | 0.54mm | 0.54mm | 0.38mm | 1.03mm | 0.54mm | ||||
壓痕深度 | 24μm | 24μm | 12μm | 53μm | 24μm | |||||
硬度 600HV時(shí) | 壓痕直徑 | 0.54mm | 0.54mm | 0.32mm | 0.90mm | 0.54mm | ||||
壓痕深度 | 17μm | 17μm | 8μm | 41μm | 17μm | |||||
硬度 800HV時(shí) | 壓痕直徑 | 0.35mm | 0.35mm | 0.35mm | ---- | 0.35mm | ||||
壓痕深度 | 10μm | 10μm | 7μm | | 10μm | |||||
滄州歐譜沖擊裝置 適用范圍 | DC型測(cè)量孔或園柱筒內(nèi); DL型測(cè)量細(xì)長(zhǎng)窄槽或孔;D型用于常規(guī)測(cè)量 | D+15型接觸面細(xì)小,加長(zhǎng),適宜測(cè)量溝槽或凹入的表面 | C型沖擊力小,對(duì)被測(cè)表面損傷很小,不破壞硬化層, 適合測(cè)量小輕薄部件及表面硬化層。 | G型 測(cè)量大厚重及表面較粗糙的鑄鍛件 | E型 測(cè)量硬度材料 |