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Sketch for TQ (spherical) types
TQ types and dimensions:
Type | D | H | SR | α° | β° |
TQ0809 | 8.25 | 9 | 4.4 | 20 | 26.5 |
TQ0913 | 9.25 | 13.5 | 5 | 20 | 26.5 |
TQ1014 | 10.25 | 14 | 5.5 | 20 | 26.5 |
TQ1116 | 11.30 | 16 | 6 | 20 | 26.5 |
TQ1217 | 12.35 | 17.1 | 6.6 | 20 | 26.5 |
TQ1318 | 13.35 | 18 | 7 | 20 | 26.5 |
TQ1420 | 14.35 | 20 | 7.7 | 20 | 14.5 |
TQ1622 | 16.35 | 22 | 8.8 | 20 | 14.5 |
Grades, properties and recommended applications
Optimal grades | Density (g/cm3) | Hardness HRA | TRS Mpa (B sample) | Recommend applications |
HK05 HK10 HK15.1 | 14.95 14.70 14.70 | 90.0 88.5 88.0 | 2500 2300 2300 | Mainly used for making cemented carbide buttons of medium and small sizes for drilling soft & medium hard rock formations, also for making cemented carbide inserts for other drill bits. |
HK20.1 YK20 YK25 HK25.1 | 14.57 14.50 14.50 14.50 | 87.5 87.5 87.5 87.5 | 2500 2300 2300 2400 | Mainly used for making cemented carbide buttons for drilling medium hard and hard rock fomations, also for making inserts for other drill bits. |
HK40 HK50 | 14.20 14.00 | 86.5 85.5 | 2450 2400 | Mainly used for making cemented carbide buttons for drilling medium hard and hard rock fomations, also for making inserts for other drill bits. |
Grades for applications in oil fields
Grades | Density (g/cm3) | Hardness HRA | TRS Mpa (B sample) | Recommend applications |
YG8C | 14.70 | 88.0 | 2200 | Mainly used for making cemented carbide buttons of medium and small sizes for drilling soft & medium hard rock formations |
YG11C YG13C | 14.35 14.20 | 87.0 86.5 | 2350 2350 | Mainly used for making cemented carbide buttons for drilling medium hard and hard rock fomations |
YG15C | 14.00 | 85.5 | 2350 | Mainly used for making cemented carbide buttons for drilling medium hard and hard rock fomations |
YG6 spherical cemented carbide buttons for oil-field mining