Classification
Nickel alloys are nickel-based alloys with other elements added. As early as 1905, Monel containing 30% copper was developed and recorded as the earlier nickel alloy. Nickle features good mechanical, physical and chemical properties. Adding appropriate elements can enhance its oxidation resistance, corrosion resistance, high temperature strength and certain physical properties. Nickel alloys can be used as materials for electron tubes, precision alloys (magnetic alloys, precision resistance alloys, electrothermal alloys, etc.), nickel-based superalloys, corrosion-resistant nickel alloys, and shape memory alloys. Nickel alloys are widely applicable to energy development, chemical, electronics, marine, aerospace arenas and etc.
1) Nickel-based high-temp alloy
The representative alloying elements added into nickel based high-temp alloys are chromium, tungsten, molybdenum, cobalt, aluminum, titanium, boron, zirconium and the like. Among them, chromium is added for anti-oxidation and anti-corrosion, and other elements for strengthening. This high-temp alloy exhibits high strength, oxidation resistance and gas corrosion resistance under high temperatures of 650-1000 °C. Nickel-based high-temp alloy is the most widely used among high temperature alloys with the highest temperature strength. It is mainly used to manufacture aerospace engine blades, rocket engines, nuclear reactors, and high temperature parts of energy conversion equipment.
2) Nickel-based corrosion resistant alloy
The main alloying elements added into nickel-based corrosion resistant alloy are copper, chromium and molybdenum. This alloy features good integrated performance, resistant to a variety of acid corrosion and stress corrosion. The earliest application is known as nickel-copper alloy, or Monel alloy. Besides, there are also nickel-chromium alloy, nickel-molybdenum alloy, nickel-chromium-molybdenum alloy and the like. They are used for various corrosion resistant parts.
3) Nickel-based wear resistant alloy
The main alloying elements added into nickel-based wear resistant alloys are chromium, molybdenum, tungsten, and also a small amount of antimony, bismuth and indium. In addition to its wear resistance, it also features good oxidation resistance, corrosion resistance and weldability. It can be used to make wear-resistant parts or harnessed as coating material, which can be coated on the surface of other base materials by surfacing and spraying technique.
4) Nickel-based precision alloy
Nickel-based precision alloys mainly includes three categories: nickel-based soft magnetic alloy, nickel-based precision electrical resistance alloy and nickel-based electrical thermal alloy. The most commonly used soft magnetic alloy is a Permalloy containing about 80% nickel. It features high maximum magnetic permeability, high initial permeability, and low coercive force, and is used as an important core material in the electronics industry.
Nickel-based precision electrical resistance alloys, with their main alloying elements being chromium, aluminum and copper, exhibit high electrical resistivity, low temperature coefficient of resistivity and good corrosion resistance, suitable for the fabrication of resistors.
Nickel-based electrical thermal alloy refers to nickel alloy which electrical energy can be converted to heat energy by virtue of high resistance of the alloy, such as Ni80Cr20. It features good oxidation and corrosion resistance and can be used under temperature of 1000~1100 °C for a long time.
5) Nickel-based shape memory alloy
Nickel-based shape memory alloy refers to those nickel alloys which shapes can recover to the original looks after being changed, through the method of heating to a certain temperature, such as nickel alloys containing 50% titanium. Its recovery temperature is 70 ° C with good shape memory effect. A small change in the proportion of nickel to titanium components allows the recovery temperature to vary from 30 to 100 °C. It is widely applicable to manufacturing self-expanding structural parts used in spacecraft, self-exciting fasteners used in aerospace industry, artificial heart motors used in biomedical field, and the like.
Contact
CIVMATS produces Nickel alloy products, such as pipes & fittings, bars. If you are in demand, please contact us:
- Company: CIVMATS CO., LIMITED
- Phone: 86-519-81809659
- Fax: 86-519-81809959
- Email: [email protected]
- Address: 10th Floor, Xin Cheng Nan Du, Wujin District, Jiangsu, China
- Website: www.civmats.com
