Masharti ya kiufundi ya almasi Rockefeller Press Head:
Mfano: HRC-3
Urefu wa jumla: 25mm
Anga: a = 120 ° R = 0.2mm
Taarifa ya kuonyesha: HRC ya juu: 0 ya kati: 0 ya chini: 0
Kuchukua mwili: ф6.36 × 10 ф8 × 15 (hatua) (takriban thamani)
Kichwa cha mashine ya almasi na radius ya spherical ya juu ni 0.2mm. (Inatumika kwa vipimo vya A, C, D na N), inatumika kwa vifaa mbalimbali kama vile: HR-150A Rochester Hardometer, Vicker Hardometer, Nuit Hardometer, nk.
Vipimo |
Aina ya kichwa |
Nguvu ya majaribio ya kwanza (N)) |
Jumla ya nguvu ya majaribio (N)) |
Matumizi mbalimbali |
HRA |
Diamond Press Kichwa |
98.07 (10kg) |
588.4(60kg) |
Carbide ngumu, Carbide uso kukabiliana chuma, Hardened chuma nyembamba sahani |
HRD |
980.7(100kg) |
Thin chuma sahani, chuma uso quenching |
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HRC |
1471(150kg) |
Chuma cha kuteka, chuma cha kuteka, chuma cha baridi |
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HRF |
chuma mpira kushinikiza kichwa φ1.5875mm (ya inchi 1/16) |
588.4(60kg) |
Chuma cha kuteka, alumini, magnesium alloy, kubeba alloy, annealed shaba alloy, nyembamba laini chuma sahani nk |
|
HRB |
980.7(100kg) |
Chuma laini, chuma cha alumini, chuma cha shaba, chuma cha kutengeneza, chuma cha kutengeneza |
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HRG |
1471(150kg) |
Phosphorus shaba, beryllium shaba na chuma |
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HRH |
chuma mpira kushinikiza kichwa φ3.175mm (ya inchi 1/8) |
588.4(60kg) |
Aluminium, zinki, kiongozi, nk |
|
HRE |
980.7(100kg) |
vifaa laini kama vile kubeba alloy, tin, plastiki ngumu |
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HRK |
1471(150kg) |





