In the field of metal processing and manufacturing, especially for tools and molds working in high temperature environments, it is very important to choose the right steel.
As a high-performance high temperature tool steel, TQ1 steel has become the first choice of many buyers due to its excellent high temperature strength, thermal shock resistance and extremely high toughness.
This article will conduct an in-depth analysis of TQ1 steel and provide you with a practical purchasing guide.
1. Overview of TQ1 Steel
TQ1 steel is a tool steel designed for high temperature operation, with excellent high temperature strength, thermal shock resistance and extremely high toughness.
Its chemical composition has been carefully optimized, including elements such as chromium (Cr), molybdenum (Mo) and vanadium (V), to ensure that it can maintain good mechanical properties in high temperature environments.
This steel is widely used in metal processing, forging, extrusion and die casting.
2. Chemical composition and mechanical properties
Chemical composition
The chemical composition of TQ1 steel is shown in the following table:
| element | C | Si | Mn | Cr | Mo | V |
|---|---|---|---|---|---|---|
| content（%） | 0.36 | 0.25 | 0.40 | 5.20 | 1.90 | 0.55 |
The precise ratio of these components ensures the stability and reliability of tool steel TQ1 in high temperature environments.
Mechanical properties
The mechanical properties of TQ1 steel are shown in the following table:
Thermal conductivity (20°C)Coefficient of thermal expansion (20-100°C)
| Performance indicators | Values |
|---|---|
| Yield strength (20°C) | 215 GPa |
| Density | 7.8 g/cm³ |
| Thermal conductivity (20°C) | 25.5 W/m·K |
| Coefficient of thermal expansion (20-100°C) | 10.3 × 10⁻⁶ m/m·K |
These performance indicators show that TQ1 steel has good strength and thermal stability in high temperature environments and can meet the needs of various high temperature operations.
3. Physical properties
The physical properties of TQ1 are shown in the following table:
Temperature range (°C)20-10020-20027.17.820-40020-600
| Temperature range (°C) | Coefficient of thermal expansion (10⁻⁶ m/m·K) | Thermal conductivity (W/m·K) | Density (g/cm³) |
|---|---|---|---|
| 20-100 | 10.3 | 25.5 | 7.8 |
| 20-200 | 11.3 | 27.1 | 7.8 |
| 20-400 | 12.2 | 27.7 | 7.8 |
| 20-600 | 12.8 | – | 7.8 |
These physical performance parameters indicate that TQ1 can maintain good thermal stability and thermal conductivity within different temperature ranges and is suitable for various high-temperature working environments.
4. Heat treatment process
The heat treatment process of TQ1 steel is as follows:
Annealing: heat to 820-840°C, keep warm for 4-6 hours, cool slowly, hardness does not exceed 220 HB.
Quenching: heat to 1010-1020°C, oil cooling or polymer cooling, quenching temperature is about 230-280°C, or vacuum quenching.
Tempering: heat to 540-680°C, the specific temperature is selected according to the required hardness and performance.
Through a reasonable heat treatment process, the mechanical properties of TQ1 steel can be further optimized to meet the needs of different high-temperature operations.
5. Application fields
TQ1 steel is widely used in the following fields:
Metal processing: used to manufacture extrusion dies, die-casting dies, etc. for light metal processing.
Forging: used to manufacture dies and tools for forging machines, such as inserts and punches for forging presses.
Extrusion: used to manufacture punches and valves for presses for heavy metal and steel extrusion.
Die casting: used to manufacture cavities, cores, ejectors, etc. for die casting dies.
Plastic processing: used to manufacture plastic molds with high wear resistance and high toughness, such as injection molds, compression molds, etc.
In short, TQ1 steel has become an ideal choice in the field of high-temperature tool steel due to its excellent high-temperature strength, thermal shock resistance and extremely high toughness.
When purchasing, combining specific needs and the actual situation of the supplier, making a wise choice will bring higher efficiency and longer service life for your high-temperature operations.
Another tool steel: ASTM D2 Tool Steel
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