铬刚玉
代号：BC-PFA
铬刚玉是以氧化铝粉为原料，适配氧化铬等，经高温熔炼而成。呈粉红色，硬度与白刚玉近似，韧性比白刚玉高。
用其制造的磨具，耐用度好，磨加工光洁度高。适用于量具、机床主轴、仪表零件、螺纹工件及样板磨等精密磨削
Chemical composition：(化学指标)
Chemical Grit size | Low chromium (低铬) | Medium chromium（中铬） | High chromium（高铬） | ||||||
AL2O3(%) | Cr2O3(%) | NaO2(%) | AL2O3(%) | Cr2O3(%) | NaO2(%) | AL2O3(%) | Cr2O3(%) | NaO2(%) | |
F12-F80 | ≥98.50 |
0.2-0.45 | ≤0.5 | ≥98.20 |
＞0.45-1.00 | ≤0.55 | ≥97.40 |
＞1.00-2.00 | ≤0.55 |
F90-F150 | ≥98.50 | ≤0.55 | ≥98.20 | ≤0.60 | ≥97.00 | ≤0.60 | |||
F180-F220 | ≥98.00 | ≤0.60 | ≥97.80 | ≤0.70 | ≥96.50 | ≤0.70 | |||
Physical property （物理性能）
Basic minerals | Crystal size(u m) | True density(ɡ/cm?) | Bulk density(ɡ/cm?) | Hardness(㎏/mm?) |
a-AL2O3 | 600-2000 | ≥3.90 | 1.40-1.95 | 2200-2300 |
可供粒度：Grit available: Grit FEPA F12 – F220#. Grit FEPA P12-220#.粒度标准 Standard：FEAP- F (Bonded abrasives), FEPA- P(Coated abrasives)
Other sizes are also available on request.
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