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Nickel alloy knowledge
Release time:
2024-07-05
Introduction of Nickel Alloy
Nickel alloy is based on nickel to add other elements of the alloy. Nickel has good mechanical, physical and chemical properties, adding suitable elements can improve its oxidation resistance, corrosion resistance, high temperature strength and improve some physical properties.
Classification and characteristics of nickel-base alloy steel
Nickel-based alloys are a class of alloys that have high strength and certain antioxidant corrosion resistance at high temperatures of 650 to 1000°C. According to the main performance is subdivided into nickel-based high temperature alloy, nickel-based corrosion resistant alloy, nickel-based wear-resistant alloy, nickel-based precision alloy and nickel-based shape memory alloy.
1. Nickel-based superalloy
The main alloying elements are chromium, tungsten, molybdenum, cobalt, aluminum, titanium, boron, zirconium and so on. Among them, chromium plays an anti-oxidation and anti-corrosion role, and other elements play a strengthening role. It has high strength, oxidation resistance and gas corrosion resistance at high temperature of 650~1000 ℃. It is the most widely used and the highest high temperature strength alloy. Mainly used in the manufacture of aero engine blades and rocket engines, nuclear reactors, energy conversion equipment on the high-temperature parts.
2. Nickel-based corrosion resistant alloy
The main alloying elements are copper, chromium and molybdenum. It has good comprehensive performance and can resist various acid corrosion and stress corrosion. The earliest application of nickel-copper alloy, also known as Monel alloy; in addition to nickel-chromium alloy, nickel-molybdenum alloy, nickel-chromium-molybdenum alloy. Used in the manufacture of various corrosion-resistant parts.
3. Nickel-based wear-resistant alloy
The main alloying elements are chromium, molybdenum, and tungsten, with small amounts of niobium, tantalum, and indium. In addition to wear resistance, its oxidation resistance, corrosion resistance, welding performance is also good. Can manufacture wear-resistant parts, can also be used as a cladding material, through the welding and spraying process to cover the surface of other substrate materials.
4. Nickel-based precision alloy
Including nickel-based soft magnetic alloy, nickel-based precision resistance alloy and nickel-based electric heating alloy. The most commonly used soft magnetic alloy is about 80% nickel-containing boromoy, its maximum permeability and initial permeability is high, low coercivity, is an important core material in the electronics industry. The main alloying elements of nickel-based precision resistance alloys are chromium, aluminum, and copper. This alloy has high resistivity, low temperature coefficient of resistivity and good corrosion resistance, and is used to make resistors. Nickel-based electric heating alloy is a nickel alloy containing 20% chromium, which has good oxidation resistance and corrosion resistance, and can be used for a long time at 1000~1100 ℃.
5. Nickel-based shape memory alloy
Nickel alloy containing titanium 50(at)%. The return temperature is 70 ℃, and the shape memory effect is good. A small change in the proportion of nickel titanium composition, can make the recovery temperature in the range of 30~100 ℃. It is mostly used in the manufacture of automatic opening structural parts used on spacecraft, self-exciting fasteners used in the aerospace industry, and artificial heart motors used in biomedicine.
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