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陶瓷球

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Characteristics Sapphire
Ruby		 Alumina Silicon
Nitrine HP		 Zirconia
Y-TZP		 Tungsten
Carbide		 Stainless
Steel		 Chrome Steel
100 Cr6
Crystalline structure Mono Poly Poly Poly Poly Poly Poly
Chemical formula Al₂O₃ 99% Al₂O₃ Si₃N₄ ZrO₂ Wc(6T10)
Purity (%) 99.99% 1%Cr₂O₃ 100 90 90 to 95 Wc94+Co6
Density (Kg/dm³) 3.99 4 3.10 to 3.20 6.00 15 8 7.85
Hardness (HV) 2300 1650 1600 1000 to 1500 1550 500 to 800 762 to 865
Compression strength (MPa) 2100 2400 3000 ≈4000 5300 - 2240
Elastic strength (MPa) - 280 400 - - 500 to 1500
Flexural strength (MPa) 390 470 1000 700 to 1100 1900 -
Resilience KIC (MPa. m½) 1 4 6 10 - 30-80
Elasticity (GPa) 430 380 320 200 610 200 205
Thermal expansion coef (10-6°K-1) 5.30 4.50 6 3.20 10 5.50 10 to 20
Thermal conductivity (W/m-6°K-1K) 36 29 40 2 80 -
Thermal capacity (J/Kg-6°K-1K) 755 900 750 500 201 -
Usable maximum temperature (°C) 1800 to 2000 1500 1200 to 1500 1000 - 300 to 600 450
Acid resistance Very good Very good Very good Good Limited Limited Not resistant
Base resistance Good Good Good Good Limited Limited Not resistant

Advantages

  • High hardness (>13000Vickers)
  • Low density (3 to 6 kg/dm³)
  • Wear resistance due to low friction coefficient
  • High elasticity module (200 to 400 GPa)
  • Chemical and thermal resistance, electrical insulation
  • High mechanical resistance (bending resistance: 400 to 1000 MPa, up to approx 1000°C)
  • Low porosity (<0.5%), very high quality surface polish
  • Machining and polishing precision e.g: for a 14 mm AL²O³ball, variation on diameter is less than 0.1µm and surface roughness (Ra) is less than 0.005µm

Applications

  • High precision and high speed bearings
  • Hip joints
  • Measuring devices
  • Measuring devices
  • Reference balls for 3D measuring machines and balls for gauges and triggers

青岛百克滚珠传动部件有限公司
Qingdao BRBC Balls & Transmission Parts Co., Ltd.

团结路921号
山东省青岛开发区
邮编 : 266510
电话: (+86-532) 8610 7680
传真: (+86-532) 8610 7682

邮箱: contact@brbc.cn

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