70Cr2 (DIN 1.2007)

La description

*0Cr2, also known as DIN 1.***7, is a high-carbon chromium steel commonly used for tooling, cutting tools, dies, and other applications that require excellent wear resistance, hardness, and durability. This grade is designed for applications where high-strength, high-hardness, and resistance to abrasive wear are crucial.

🔹 Properties of *0Cr2 (DIN 1.***7)

1. Chemical Composition:

   • Carbon (C): 0.*5% 0.*5%
   • Chromium (Cr): 1.*0% 1.*0%
   • Manganese (Mn): 0.*0% 0.*0%
   • Silicon (Si): 0.*0% 0.*0%
   • Phosphorus (P): Max 0.**0%
   • Sulfur (S): Max 0.**0%

   The high carbon content gives it superior hardness, while the chromium increases wear resistance and helps with hardenability.

2. Mechanical Properties:
   • Tensile Strength: *******0 MPa
   • Yield Strength: ******0 MPa
   • Hardness (after heat treatment): ****2 HRC
   • Elongation: Approximately ****2%
   • Impact Strength: ****5 J (at *0°C)

These mechanical properties make *0Cr2 highly effective in environments where abrasive wear is a concern and parts require both toughness and hardness.

3. Physical Properties:
   • Density: 7.*0 g/cm³
   • Modulus of Elasticity: **0 GPa
   • Thermal Conductivity: *0 W/m·K

🔹 Applications of *0Cr2 (DIN 1.***7)

Due to its hardness and wear resistance, *0Cr2 (DIN 1.***7) is widely used in applications that involve high-stress, high-heat, and abrasive environments:

1. Tooling & Cutting Tools:

   • Cutting tools, dies, molds, and blades that are exposed to continuous friction or wear
   • Ideal for high-performance machining

2. Automotive Industry:

   • Valve seats, gears, crankshafts, and camshafts
   • Parts that undergo extreme friction and require high strength

3. Mechanical Engineering:

   • Bearings, rollers, and cutting elements
   • Suitable for high-wear machinery parts

4. Heavy Industry & Mining:

   • Components exposed to high abrasion or impact
   • Used in earth-moving machinery and mining equipment

🔹 Heat Treatment and Hardening of *0Cr2 (DIN 1.***7)

*0Cr2 can be heat treated to achieve its maximum hardness and wear resistance, making it suitable for demanding applications. The following heat treatment processes are typically applied:

1. Austenitizing:

   • Temperature: **0°C **0°C
   • The material is heated to this temperature to form austenite (the high-temperature phase of steel).

2. Quenching:

   • The material is rapidly cooled by immersing it in oil or water to harden the steel.
   • Oil Quenching is often preferred to reduce cracking or distortion.

3. Tempering:

   • After quenching, the steel is tempered to achieve a desired hardness level and reduce brittleness.
   • Temperature: **0°C **0°C, which provides a balance between hardness and toughness.

The end result is a hard, durable steel with high wear resistance and abrasion resistance.

🔹 Key Benefits of *0Cr2 (DIN 1.***7)

✅ High Hardness & Wear Resistance: Suitable for tooling and cutting applications with high levels of abrasive wear.
✅ Toughness: Despite high hardness, it maintains good toughness and impact resistance.
✅ Heat Resistance: Retains hardness at elevated temperatures, making it suitable for high-heat applications.
✅ Good Machinability (with heat treatment): Though hard, it can be machined with the proper tools and processes after heat treatment.

🔹 Summary of *0Cr2 (DIN 1.***7):

*0Cr2 (DIN 1.***7) is a high-carbon chromium steel with excellent hardness, wear resistance, and toughness. It is ideal for tooling, cutting tools, and high-stress mechanical components that require both strength and resistance to abrasion. With heat treatment, it can achieve high hardness and maintain performance under extreme conditions, making it valuable in industries like automotive, manufacturing, and mining.