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PRIDE OF QUALITY PARKWON STEEL BALL

产品介绍

Ceramic Ball

产品介绍

陶瓷球(Si3N4)

在高速、高温、腐蚀等特殊环境下，为了克服传统高碳铬钢轴承（SUJ）的材料在耐热中的缺陷，在电动汽车及轻量化轴承领域中使用的材质。

博元公司从经过客户批准的HIP（热等静压）方式的烧结企业处采购空白球，目前已完成全球轴承制造商的产品质量认证，建立了Grade5的批量生产体系。

세라믹 볼 사진
세라믹 볼 사진
세라믹 볼 사진

流程说明

流程说明
分类 陶瓷粉末(Silicon Nitride Powder) Blank Ball(烧结) Ball(成品)
#01 #02 #03 #04 #05 #06 #07 #08
工序 3/16” ~ 1/2” 4,762 ~ 12.7mm 混合 成型
（产品形状化）		 加工 烧结
(HIP : HOT Isotatic pressing)		 加工
（研磨）		 检查

陶瓷球种类

陶瓷球种类
种类 云轴承适用陶瓷
特点 用途 适用范围
Si3N4 高强度，非磁性，耐磨，耐腐蚀 高负载/高速旋转轴承 涡轮增压器，主轴，电机引擎等
ZrO2 抗高温性，高强度，耐磨 高温轴承 炉子，高温（燃气涡轮机）零部件
ZrO2 工业泵
AI2O3 绝缘体，高强度，耐磨 坦克设备轴承 半导体及生物（人体骨骼）零件

质量规范

空白球材料质量
空白球材料质量
Item Inspection Method Specification Inspection
Frequency *1, *2
1. Physical
Properties		 Elastic Modulus Bend Resonance Method 298 ~ 318 [GPa] n=1 / Material Intrinsic Value (not routinely measured)
c = 0
Poisson's ratio 0.28 ~ 0.30
Coefficient of Thermal Expansion Optical Interferometry 2.9 ~ 3.2 [x10-6/deg c]
Thermal Conductivity Laser Flash Method 18 ~ 25 [w/mk]
Constituent Phase*3 X-ray Diffraction Method Cu K α No residual alpha phase peak
2. Mechanical
Properties		 Density Archimedes's Method 3.22 ~ 3.26 [Mg/m3] n=5 / Manufacturing lot
c = 0
Hardness Vicker's Method 196, 1N - 30sec, (ASTM F 2094) 1400 ~ 1750 [HV] n=3 / Manufacturing lot
c = 0
Rupture Strength 3-point Bending Test (J|S R1601) Min.735 [MPa] n=20 / Material lot (powder lot)
Toughness |F Method 196, 1N - 30sec, (ASTM F 2094) 6 ~ 8 [MPa·m1/2] n=3 / Manufacturing lot
c = 0
3. Internal Defect *3*4 Metallograph x200 To not have following inside (cross section) of blanks
  1. Inclusions over average diameter of 15um (excluding sintering additive element)
  2. Voids over average diamante of 10um
  3. White or Black Color discoloration : Less than half of Grinding Allowance
 n=5 / Manufacturing lot * In case the shipment qty is 1kp or less, n=3 / Manufacturing lot
c = 0
4. Crack *3 Fluorescent Penetrant Test (Visual inspection under UV lamp after immersion to fluorescent penetrant washing and drying) No Crack One Hundred Percent Inspection
5. Appearance *3 Visual Check / Boundary Sample (Depth of chipping and height of protrusion on boundary sample will be produced by using depth of focus method of metallograph,)
  1. Chipping/dent : Depth of less than 0.15mm (Length and Width will be allowed)
  2. Protrusion : Height of less than 0.20mm (Length and Width will be allowed)
  3. Attachment of foreign particles : will be allowed
  4. Foreign substance on surface : will be allowed
  5. Roughing of surface : Same as chipping/protrusion
  6. Color unevenness : will be allowed
  7. Die Mark : Same as chipping/protrusion
 One Hundred Percent Inspection
6. Dimension Micrometer Equator Band Diameter (Diagonal diameter of equator band to be not subject of specification) Diameter variation 0.15mm (~3/8")
0.20mm (13/32" ~)
n=5 / Manufacturing lot
c = 0
  1. Material Lot
    Silicon Nitride powder lot that can assure uniformity of material characteristic
  2. Manufacturing Lot
    Dispatch lot that can assure uniformity of manufacturing record
  3. Report based on passing status judgement
  4. There are cases discoloration is observed after finishing, even though internal defect of inclusion or pore are not detected. This will be considered to be not a subject of defect.