Steel TQ1
TQ1 steel:
maximum toughness and high-temperature strenght.
What?
Steel TQ1 is a Cr-Mo-V alloyed hot work tool steel with very good high-temperature strength characteristics and maximum toughness. This quality is also characterised by good thermal shock resistance and is only manufactured in remelted form according to the ESU process.
Material properties
- High strength.
- Maximum toughness.
- Thermical schock resistance.
Application
- Pressure die casting.
- Extrusion presses for heavy duty press stamps > 1100 MPa, dies.
- Drop forging.
- Hot forming.
Physical properties of TQ1
| Temperature in °C | 20-100 | 20-200 | 20-400 | 20-600 |
|---|---|---|---|---|
| Thermal expansion in 10-6m/m x K | 10.3 | 11.3 | 12.6 | 13.0 |
| Temperature in °C | 20 | 200 | 400 | |
| Thermal conductivity in W/m x K | 29.8 | 31.0 | 31.4 | |
| Temperature in °C | 20 | |||
| Density in g/cm3 | 7.8 | |||
| Temperature in °C | 20 | |||
| E module in GPa | 214 |
Heat treatment
| Soft annealing | Temperature: 820 – 840 °C, 4 – 6 hrs |
|---|---|
| Cooling: slow furnace cooling/td> | |
| Hardness: max. 220 HB | |
| Hardening | Temperature: 1010 – 1020 °C |
| Cooling Interrupt oil or polymer cooling at 230 – 280 °C or vacuum hardening | |
| Tempering | Temperature: 540 – 680 °C |
| Hardness: see tempering curve | |
| Nitriding | If die-casting dies are to be nitrided, nitriding program 99 should be selected. This nitriding layer does not have a compound layer and therefore does not have a negative impact on the formation of thermal shock cracks |
| Preheat before use | Temperature: 150 – 350 °C depending on area of application |
Graphs and datasheets of TQ1
Continue time-temperature-transformation
Tempering
High-temperature strength
