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白刚玉F230即电熔氧化铝W63,是磨具行业例如油石、抛光轮等产品常用的磨料。因其耐磨性好,自锐性好,硬度高等优点,广泛用于研磨制品的原材料。电熔氧化铝是将纯度99%含量的工业氧化铝粉在电弧炉里经2050度高温熔融冶炼结晶而来,因此电熔氧化铝又被称为电熔刚玉。电熔氧化铝纯度高、自锐性好、耐酸碱腐蚀、耐高温、热态 性能稳定它硬度略高于棕刚玉,韧性稍低,切削力强。
White alox F230, also known as fused alumina W63, is a commonly used abrasive in the abrasive industry, such as oilstones, polishing wheels, and other products. Due to its good wear resistance, self sharpening, and high hardness, it is widely used as a raw material for grinding products. White electro fused aluminum oxide is obtained by melting and crystallizing industrial alumina powder with a purity of 99% in an electric arc furnace at a high temperature of 2050 degrees Celsius, hence it is also known as electrically fused alumina. Electromelted alumina has high purity, good self sharpening, acid and alkali corrosion resistance, high temperature resistance, and stable thermal performance. Its hardness is slightly higher than that of brown alumina, and its toughness is slightly lower, with strong cutting force.
1. 生产磨具制品用的白刚玉磨料选用纯度固定炉白刚玉块,硬度、堆积密度、韧性优于倾倒炉白刚玉,能提升砂轮的耐磨性,磨削力。
2. 白刚玉的自锐性强,在磨削过程中可不断产生棱角进行研磨,生产出来的磨具制品锋利,不会烧伤工件。
3. 磨具生产用的白刚玉堆积密度高,单位体积内可放入更多的磨粒,磨削或切割过程中有更多的磨料参与工作,可以提高产品的使用寿命。
4. 电熔白刚玉砂的粒度均匀,对粒径范围的控制严格;白刚玉微粉经过酸洗水分工艺生产,无大颗粒,兼顾了表面粗糙度和研磨效率。
5. 磨具生产用的白刚玉颜色白度高,杂质少,可添加各种染料制成彩色的砂轮。
6. 白刚玉的钠含量低,阿尔法转化率高,硬度高。白刚玉的铁含量可以忽略不计,因而不会对磨削工件造成污染或烧伤。制成的砂轮可用于医疗、食品工业、航空航天、半导体等领域。
|
白刚玉粒度砂 |
白刚玉微粉 |
AL2O3 |
99.53% |
99.27% |
SiO2 |
0.13% |
0.14% |
NA2O |
0.23% |
0.28% |
Fe2O3 |
0.07% |
0.06% |
CaO |
0.03% |
0.05% |
颜色 |
白色 |
莫氏硬度 |
9.0 |
努普硬度 |
2000 - 2200 Kg/mm2 |
使用温度 |
1900 ℃ |
熔点 |
2250 ℃ |
比重 |
3.95g/cm3 |
体积密度 |
3.6g/cm3 |
堆积密度 |
1.55-1.95 g/cm3 |
比热 |
0.26 cal/g. ℃(20-90℃) |
导热系数 |
6.16W/(m·K)(1000℃) |
线膨胀系数 |
8.0×10-6/℃(200-1000℃) |
折射率 |
e=1.760 w=1.768 |
化学反应 |
酸性物质:在王水和氢氟酸中少有腐蚀; |
晶形 |
三方晶系 |
W标 | ||||||||||
粒度 | 最粗粒 | 粗粒 | 基本粒 | 混合粒 | 细粒 | |||||
尺寸范围(um) | 允许颗粒 | 尺寸范围(um) | 重量%不多于 | 尺寸范围(um) | 重量%不少于 | 尺寸范围(um) | 重量%不少于 | 尺寸范围(um) | 重量%不多于 | |
W63 | 100-80 | 1 | 80-63 | 15 | 63-50 | 50 | 63-40 | 80 | 细于40 | 5 |
W50 | 80-63 | 1 | 63-50 | 15 | 50-40 | 50 | 50-28 | 80 | 细于28 | 5 |
W40 | 63-50 | 1 | 50-40 | 15 | 40-28 | 50 | 40-20 | 80 | 细于20 | 5 |
W28 | 50-40 | 1 | 40-28 | 18 | 28-20 | 45 | 28-14 | 74 | 细于14 | 8 |
W20 | 40-28 | 1 | 28-20 | 18 | 20-14 | 45 | 20-10 | 74 | 细于10 | 8 |
W14 | 28-20 | 2 | 20-14 | 20 | 10-14 | 45 | 14-7 | 72 | 细于7 | 8 |
W10 | 20-14 | 2 | 10-14 | 20 | 10-7 | 40 | 10-5 | 70 | 细于5 | 10 |
W7 | 10-14 | 2 | 10-7 | 20 | 7-5 | 40 | 7-3.5 | 70 | 细于3.5 | 10 |
W5 | 10-7 | 3 | 7-5 | 20 | 5-3.5 | 40 | 5-2.5 | 70 | 细于2.5 | 10 |
欧标微粉型号 | D3(um) | D50(um) | D94(um) |
F230 | <82 | 53.0±3.0 | >34 |
F240 | <70 | 44.5±2.0 | >28 |
F280 | <59 | 36.5±1.5 | >22 |
F320 | <49 | 29.2±1.5 | >16.5 |
F360 | <40 | 22.8±1.5 | >12 |
F400 | <32 | 17.3±1.0 | >8 |
F500 | <25 | 12.8±1.0 | >5 |
F600 | <19 | 9.3±1.0 | >3 |
F800 | <14 | 6.5±1.0 | >2 |
F1000 | <10 | 4.5±0.8 | >1 |
F1200 | <7 | 3.0±0.5 | >1(at 80%) |
F1500 | <5 | 2.0±0.4 | >0.8(at 80%) |
F2000 | <3.5 | 1.2±0.3 | >0.5(at 80%) |
1. 陶瓷砂轮
2. 轴承研磨轮
3. 磨头
4. 树脂砂轮
5. 切割片打磨片
6. 钢纸砂盘
7. 橡胶砂轮
8. 抛磨块等
9. 金刚石砂轮的辅料
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