Views: 78 Author: Site Editor Publish Time: 2024-11-25 Origin: Site
Nickel-based alloy refers to a type of alloy with comprehensive properties such as high strength and certain resistance to oxidation and corrosion at high temperatures of 650-1000°C. According to the main properties, it is further divided into nickel-based heat-resistant alloys, nickel-based corrosion-resistant alloys, nickel-based wear-resistant alloys, nickel-based precision alloys and nickel-based shape memory alloys. According to the different matrixes, high-temperature alloys are divided into: iron-based high-temperature alloys, nickel-based high-temperature alloys and cobalt-based high-temperature alloys. Among them, nickel-based high-temperature alloys are referred to as nickel-based alloys. N06625 is a nickel-based high-temperature alloy, also known as Inconel625. Its main chemical components are nickel (Ni) and chromium (Cr), and it contains a small amount of molybdenum (Mo), niobium (Nb) and titanium (Ti) and other elements.
N06625 has good high temperature strength, corrosion resistance and good welding performance, and is widely used
Used in many fields, such as:
1. Ocean: marine structures in the marine environment, seawater desalination, seawater aquaculture, seawater heat exchange, etc.
2. Environmental protection field: flue gas desulfurization equipment for thermal power generation, wastewater treatment, etc.
3. Energy field: atomic power generation, comprehensive utilization of coal, wave power generation, etc.
4. Petrochemical industry: oil refining, chemical equipment, etc.
5. Food field: salt production, soy sauce brewing, etc. In many of the above fields, ordinary stainless steel 304 is not competent. In these special fields, special stainless steel is indispensable and cannot be replaced.
Including nickel (Ni), chromium (Cr), molybdenum (Mo), and also contains a smaller amount of iron (Fe) and a small amount of niobium (Nb). The addition of chromium and molybdenum significantly improves the alloy's resistance to oxidation and corrosion, while the presence of niobium enhances its resistance to stress corrosion cracking. The alloy has good high-temperature strength and corrosion resistance at high temperatures, and has high plasticity and toughness at high temperatures. In addition, N06625 has excellent salt water corrosion resistance and has strong corrosion resistance to various corrosive media.
N06625 alloy also has the following properties:
1. Good high temperature resistance: In high temperature environments, N06625 alloy has excellent resistance to oxidation, corrosion and creep, and can be used for a long time below 800°C.
2. High strength: N06625 alloy has high yield strength and tensile strength at room temperature and high temperature, and is suitable for high temperature and high pressure environments.
Nickel (Ni): ≥58%
Chromium (Cr): 20-23%
Molybdenum (Mo): 8-10%
Aluminum（Al）:≤0.4%
Carbon (C): ≤0.10%
Silicon (Si): ≤0.50%
Iron (Fe): ≤5.0%
Titanium(Ti）：≤0.4%
Phosphorus(P):≤0.015%
During long-term use, the alloy will undergo age hardening, resulting in a decrease in plasticity. The composition content of Inconel625 also includes carbon, silicon, manganese, phosphorus, sulfur and other elements, of which carbon ≤ 0.10%, silicon ≤ 0.50%, manganese ≤ 0.50%, phosphorus ≤ 0.015%, sulfur ≤ 0.015%. Inconel625 has the characteristics of density 8.44, non-magnetic, melting point 1288-1349°C, specific heat capacity 410-460 J/kg·K and thermal conductivity 0.92~1.74 W/(m·K). Its mechanical properties include tensile strength σb ≥ 758Mpa, yield strength σb ≥ 379Mpa, elongation δ ≥ 30%, and hardness HB150-220. The heat treatment conditions are 1-2 hours of heat preservation between 950-1150℃ and rapid air cooling or water cooling.
N06625 has good processing performance and can be used for a variety of processing methods, such as forging, rolling, drawing, die forging, precision casting and welding. Its processing temperature is generally around 1170 degrees, and it has good cold working and cold forming operation capabilities. . In terms of thermoforming process, N06625 usually requires heat treatment at 1093~1204 degrees.
