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CHEMICAL COMPOSITION
C: 0.90%-1.00%
Si: ≤0.80%
Mn: ≤0.80%
P：≤0.035%
S：≤0.030%
Cr: 17.00%-19.00%
Ni: allowed to contain ≤0.60%
Mo: can be added ≤0.75%
MECHANICAL PROPERTIES
Elastic modulus: 210 GPa at normal temperature
Yield strength: 1200 MPa
Tensile strength: 1500 MPa
Hardness: around 59 HRC
PHYSICAL PROPERTIES
Thermal expansion coefficient: The average thermal expansion coefficient from 20 to 100°C is 10.5×10^-6/(°C)
Thermal conductivity coefficient: At 100°C, the thermal conductivity coefficient is 29.3 W/m·°C
Specific heat capacity: 460 J/kg·°C from 0 to 100°C
Resistivity: 0.65 Ω mm²/m at 20°C
Density: 7.7 g/cm³
HEAT TREATMENT
Annealing treatment: The usually selected temperature range is 800~920°C, and is slowly cooled after being kept warm for a period of time.
Quenching treatment: The quenching temperature is generally 1050~1100℃, and it is quickly cooled after being kept warm for a period of time. The commonly used cooling medium is 10# or 20# mechanical oil or N2 gas at 30~60℃.
Tempering treatment: The parts after quenching need to be tempered. The commonly used tempering temperature is 180~300℃, and the holding time is 1-2 hours.
FORGING
Material selection: During the forging process, you first need to select suitable raw materials to ensure stable material quality and avoid defects or unevenness.
Preheating treatment: Preheating treatment is a very important step in the forging process. The preheating temperature is generally controlled at around 800°C and adjusted according to the characteristics of the specific material.
Forging process: Forging process requirements include hammering force, forging temperature and forging speed. The forging temperature is generally controlled at around 1000°C, and it is necessary to prevent the material from exceeding its critical temperature to avoid grain growth or overheating. The forging speed should be moderate, not only to ensure the accuracy of the material shape, but also to avoid damage to the material caused by too fast speed.
Forging mold design: Forging mold design needs to be determined according to the specific part shape and size. At the same time, the mold needs to have good wear resistance and thermal stability.
Post-forging treatment: Proper cooling is required after forging to avoid cracks.
CHEMICAL COMPOSITION
C: 0.90%-1.00%
Si: ≤0.80%
Mn: ≤0.80%
P：≤0.035%
S：≤0.030%
Cr: 17.00%-19.00%
Ni: allowed to contain ≤0.60%
Mo: can be added ≤0.75%
MECHANICAL PROPERTIES
Elastic modulus: 210 GPa at normal temperature
Yield strength: 1200 MPa
Tensile strength: 1500 MPa
Hardness: around 59 HRC
PHYSICAL PROPERTIES
Thermal expansion coefficient: The average thermal expansion coefficient from 20 to 100°C is 10.5×10^-6/(°C)
Thermal conductivity coefficient: At 100°C, the thermal conductivity coefficient is 29.3 W/m·°C
Specific heat capacity: 460 J/kg·°C from 0 to 100°C
Resistivity: 0.65 Ω mm²/m at 20°C
Density: 7.7 g/cm³
HEAT TREATMENT
Annealing treatment: The usually selected temperature range is 800~920°C, and is slowly cooled after being kept warm for a period of time.
Quenching treatment: The quenching temperature is generally 1050~1100℃, and it is quickly cooled after being kept warm for a period of time. The commonly used cooling medium is 10# or 20# mechanical oil or N2 gas at 30~60℃.
Tempering treatment: The parts after quenching need to be tempered. The commonly used tempering temperature is 180~300℃, and the holding time is 1-2 hours.
FORGING
Material selection: During the forging process, you first need to select suitable raw materials to ensure stable material quality and avoid defects or unevenness.
Preheating treatment: Preheating treatment is a very important step in the forging process. The preheating temperature is generally controlled at around 800°C and adjusted according to the characteristics of the specific material.
Forging process: Forging process requirements include hammering force, forging temperature and forging speed. The forging temperature is generally controlled at around 1000°C, and it is necessary to prevent the material from exceeding its critical temperature to avoid grain growth or overheating. The forging speed should be moderate, not only to ensure the accuracy of the material shape, but also to avoid damage to the material caused by too fast speed.
Forging mold design: Forging mold design needs to be determined according to the specific part shape and size. At the same time, the mold needs to have good wear resistance and thermal stability.
Post-forging treatment: Proper cooling is required after forging to avoid cracks.
