| Quantity: | |
|---|---|
C: 0.5-0.6
Si: ≤0.4
Mn: 0.5-0.8
P: ≤0.03
S: ≤0.03
Ni: 1.4-1.8
Cr: 0.5-0.8
Mo: 0.15-0.30
Yield Strength Rp0.2(MPa): ≥ 529
Tensile Strength Rm(MPa): ≥ 899
Impact Energy AKV(J): ≥ 78
Elongation at Fracture A(%): ≥ 33
Reduction in Cross Section on Fracture Z(%): ≥ 55
Impact toughness value αkv (J/cm2): ≥ 98
Hardness(Brinell): ≤ 280
Annealing process: The annealing process of 5CrNiMo steel usually involves heating it to 750-800℃, keeping it for a period of time and then slowly cooling it to room temperature to eliminate internal stress and improve plasticity and processability.
Quenching and tempering: The heat treatment of 5CrNiMo steel usually includes two steps: quenching and tempering. The quenching temperature range is 820-860℃, followed by oil cooling or water cooling to quickly cool and increase hardness and strength. The quenched steel is tempered at 150-250℃ to reduce hardness and improve toughness.
Pre-cooling direct quenching: For 5CrNiMo steel, a typical heat treatment process is pre-cooling direct quenching. This involves heating the steel to 830-860℃, then pre-cooling to 750-780℃ in air, followed by oil cooling to around 150-180℃, and finally tempering.
Tempering process: The tempering temperature of 5CrNiMo steel is usually between 150-220℃, and this temperature range helps to obtain the required balance of hardness and toughness.
Alloy steel has emerged as a game - changer in the world of materials, constantly pushing the boundaries of what is possible in terms of performance, durability, and functionality. As industries become more advanced and applications more demanding, the need for materials that can offer superior properties has led to the continuous development of new alloy steel grades. These innovative alloys are designed to meet the challenges of modern engineering, whether it's in high - tech manufacturing, renewable energy, or advanced transportation systems.
1. Superior Strength - to - Weight Ratio: One of the key features of many alloy steels is their exceptional strength - to - weight ratio. By carefully selecting and optimizing the alloying elements, manufacturers can create steels that are much stronger than carbon steel while remaining relatively lightweight. This is of great importance in industries such as aerospace, automotive, and transportation, where reducing the weight of components can lead to significant fuel savings and improved performance. For example, in the automotive industry, using high - strength alloy steels for body panels and structural components can reduce the vehicle's weight without sacrificing safety.
2. High - Temperature and Low - Temperature Performance: Alloy steels can be engineered to perform well in both high - temperature and low - temperature environments. In high - temperature applications, alloys with elements like chromium, nickel, and cobalt can maintain their strength and integrity at elevated temperatures, making them suitable for use in gas turbines, jet engines, and industrial furnaces.
C: 0.5-0.6
Si: ≤0.4
Mn: 0.5-0.8
P: ≤0.03
S: ≤0.03
Ni: 1.4-1.8
Cr: 0.5-0.8
Mo: 0.15-0.30
Yield Strength Rp0.2(MPa): ≥ 529
Tensile Strength Rm(MPa): ≥ 899
Impact Energy AKV(J): ≥ 78
Elongation at Fracture A(%): ≥ 33
Reduction in Cross Section on Fracture Z(%): ≥ 55
Impact toughness value αkv (J/cm2): ≥ 98
Hardness(Brinell): ≤ 280
Annealing process: The annealing process of 5CrNiMo steel usually involves heating it to 750-800℃, keeping it for a period of time and then slowly cooling it to room temperature to eliminate internal stress and improve plasticity and processability.
Quenching and tempering: The heat treatment of 5CrNiMo steel usually includes two steps: quenching and tempering. The quenching temperature range is 820-860℃, followed by oil cooling or water cooling to quickly cool and increase hardness and strength. The quenched steel is tempered at 150-250℃ to reduce hardness and improve toughness.
Pre-cooling direct quenching: For 5CrNiMo steel, a typical heat treatment process is pre-cooling direct quenching. This involves heating the steel to 830-860℃, then pre-cooling to 750-780℃ in air, followed by oil cooling to around 150-180℃, and finally tempering.
Tempering process: The tempering temperature of 5CrNiMo steel is usually between 150-220℃, and this temperature range helps to obtain the required balance of hardness and toughness.
Alloy steel has emerged as a game - changer in the world of materials, constantly pushing the boundaries of what is possible in terms of performance, durability, and functionality. As industries become more advanced and applications more demanding, the need for materials that can offer superior properties has led to the continuous development of new alloy steel grades. These innovative alloys are designed to meet the challenges of modern engineering, whether it's in high - tech manufacturing, renewable energy, or advanced transportation systems.
1. Superior Strength - to - Weight Ratio: One of the key features of many alloy steels is their exceptional strength - to - weight ratio. By carefully selecting and optimizing the alloying elements, manufacturers can create steels that are much stronger than carbon steel while remaining relatively lightweight. This is of great importance in industries such as aerospace, automotive, and transportation, where reducing the weight of components can lead to significant fuel savings and improved performance. For example, in the automotive industry, using high - strength alloy steels for body panels and structural components can reduce the vehicle's weight without sacrificing safety.
2. High - Temperature and Low - Temperature Performance: Alloy steels can be engineered to perform well in both high - temperature and low - temperature environments. In high - temperature applications, alloys with elements like chromium, nickel, and cobalt can maintain their strength and integrity at elevated temperatures, making them suitable for use in gas turbines, jet engines, and industrial furnaces.
