里氏硬度計測試范圍(表一)
材料 |
硬度制 |
沖擊裝置 |
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D/DC |
D+15 |
C |
G |
E |
DL |
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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 |
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HRA |
59.1~85.8 |
61.7~88.0 |
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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 |
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Steel鍛鋼 |
HS |
32.2~99.5 |
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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 |
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Stainless steel 不銹鋼 |
HRB |
46.5~101.7 |
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HB |
85~655 |
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HV |
85~802 |
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GC. IRON 灰鑄鐵 |
HRC |
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HB |
93~334 |
92~326 |
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HV |
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NC、IRON 球墨鑄鐵 |
HRC |
||||||
HB |
131~387 |
127~364 |
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HV |
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C.ALUM 鑄鋁合金 |
HB |
19~164 |
23~210 |
32~168 |
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HRB |
23.8~84.6 |
22.7~85.0 |
23.8~85.5 |
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BRASS 銅鋅合金 |
HB |
40~173 |
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HRB |
13.5~95.3 |
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BRONZE銅錫(鋁)合金 |
HB |
60~290 |
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COPPER純銅 |
HB |
45~315 |
示值誤差和示值重復性(表二)
異型沖擊裝置 |
DC(D)/DL
|
D+15
|
C |
G |
E |
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沖擊能量沖擊體質量 |
11mJ5.5g/7.2g |
11mJ7.8g |
2.7mJ3.0g |
90mJ20.0g |
11mJ5.5g |
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球頭硬度:球頭直徑:球頭材料: |
1600HV3mm碳化鎢 |
1600HV3mm碳化鎢 |
1600HV3mm碳化鎢 |
1600HV5mm碳化鎢 |
5000HV3mm金剛石 |
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沖擊裝置直徑:沖擊裝置長度:沖擊裝置重量: |
20mm
86(147)/ 75mm
50g |
20mm162mm80g |
20mm141mm75g |
30mm254mm250g |
20mm155mm80g |
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試件最大硬度 |
940HV |
940HV |
1000HV |
650HB |
1200HV |
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試件表面平均粗糙度Ra: |
1.6μm |
1.6μm |
0.4μm |
6.3μm |
1.6μm |
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試件最小重量:可直接測量需穩(wěn)定支撐需密實耦合 |
>5kg2~5kg0.05~2kg |
>5kg2~5kg0.05~2kg |
>1.5kg0.5~1.5kg0.02~0.5kg |
>15kg5~15kg0.5~5kg |
>5kg2~5kg0.05~2kg |
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試件最小厚度密實耦合硬化層最小深度 |
5mm≥0.8mm |
5mm≥0.8mm |
1mm≥0.2mm |
10mm≥1.2mm |
5mm≥0.8mm | |||||
球頭壓痕尺寸 |
||||||||||
硬度300HV時 |
壓痕直徑壓痕深度 |
0.54mm24μm |
0.54mm24μm |
0.38mm12μm |
1.03mm53μm |
0.54mm24μm |
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硬度600HV時 |
壓痕直徑壓痕深度 |
0.54mm17μm |
0.54mm17μm |
0.32mm8μm |
0.90mm41μm |
0.54mm17μm |
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硬度800HV時 |
壓痕直徑壓痕深度 |
0.35mm10μm |
0.35mm10μm |
0.35mm7μm |
---- |
0.35mm10μm |
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沖擊裝置適用范圍 |
DC型測量孔或園柱筒內; DL型測量細長窄槽或孔;D型用于常規(guī)測量 |
D+15型接觸面細小,加長,適宜測量溝槽或凹入的表面 |
C型沖擊力小,對被測表面損傷很小,不破壞硬化層,適合測量小輕薄部件及表面硬化層。 |
G型測量大厚重及表面較粗糙的鑄鍛件 |
E型測量硬度極高材料 |
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