陶瓷成品球与钢球精度等级对照表
陶瓷成品球精度等级标准Q/ZXSQ21・2004与钢球成品标准ISO 3290、GB/T 308-2002对照表:
等级 | 公差 | 批直径变动量 | 球直径变动量 | 球形偏差 | 表面粗糙度 |
| 不超过(卩m) |
ISO | GB | ZXSQ | ISO | GB | ZXSQ | ISO | GB | ZXSQ | ISO | GB | ZXSQ | ISO | GB | ZXSQ | ISO | GB | ZXSQ |
3 | 3 | 3 | ±5 | ±5 | ±5 | 0.13 | 0.13 | 0.13 | 0.08 | 0.08 | 0.08 | 0.08 | 0.08 | 0.08 | 0.012 | 0.012 | 0.012 |
5 | 5 | 5 | ±5 | ±8 | ±7 | 0.25 | 0.25 | 0.25 | 0.13 | 0.13 | 0.13 | 0.13 | 0.13 | 0.13 | 0.02 | 0.02 | 0.02 |
10 | 10 | 10 | ±9 | ±10 | ±10 | 0.5 | 0.5 | 0.5 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | 0.025 | 0.025 | 0.025 |
16 | 16 | 16 | ±10 | ±16 | ±12 | 0.8 | 0.8 | 0.7 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.032 | 0.032 | 0.025 |
20 | 20 | 20 | ±12 | ±16 | ±14 | 1 | 1 | 0.8 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.04 | 0.04 | 0.032 |
28 | 28 | 28 | ±12 | ±16 | ±14 | 1.4 | 1.4 | 1.2 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.05 | 0.05 | 0.05 |
钢球成品指标 | 陶瓷球成品指标 |
◎硬度:60~66HRC | ◎硬度:氮化硅、赛龙、碳化硅:2300〜2700HV |
◎同一粒钢球硬度差:〈0.5HRC | ◎氧化锆:1200-1500HV |
◎同一批钢球硬度差:W1.0HRC | ◎同一粒球硬度差:W2HV |
◎脱碳层:W0.02mm | ◎同一批球硬度差:W3HV |
◎显微组织:1~3级表面无屈氏体 | ◎密度:氮化硅、碳化硅:3.15~3.26g/cm3 |
| ◎氧化
锆 :6.01 〜6.04g/cm3 |
| ◎赛龙:2.93 〜3.2g/cm3 |
| ◎显微组织:具有均匀的微细组织 |
| ◎气孔率:<1% |