Introduction to nickel base alloy knowledge, and in which fields is nickel base alloy applied?

Nickel-based alloy composed of other elements is called nickel alloy. Nickel has good mechanical, physical and chemical properties, and the addition of suitable elements can improve its oxidation resistance, corrosion resistance, high temperature strength and improve certain physical properties. Nickel alloys can be used as materials for electronic tubes, precision alloys (magnetic alloys, precision resistance alloys, electrothermal alloys, etc.), nickel-based high-temperature alloys, and nickel-based corrosion-resistant alloys and shape memory alloys. Nickel alloys have a wide range of uses in sectors such as energy development, chemical, electronics, marine, aviation and aerospace.

Nickel-based alloy classification and composition comparison

A nickel-based alloy electrodes can be divided into five categories, namely, industrial pure Ni, Ni-Cu, Ni-Cr-Fe, Ni-Mo and Ni-Cr-Mo. Each category can be divided into one or more types of welding electrodes. This type of electrode is mainly used for welding nickel or high nickel alloy, sometimes can also be used for welding or overlay welding of dissimilar metals.

Application and development of nickel alloy in the field of aviation

Nickel-based superalloys for aero-engine disks The goal of the development of this type of alloy is to make it available at higher service temperatures by adding additional elements. A newly developed nickel-based alloy with improved creep and fatigue properties is Ni-20Cr-1.5Al-3Ti-4.5Mo-13.5Co. Initially, this alloy was prepared by vacuum induction melting (VIM) and vacuum arc remelting (VAR). Due to the reduced life of the discs due to composition bias white spots and carbide build-up, Specialty Metals Corporation (SMC) switched to VIM and electroslag refining to eliminate these defects, and future newer engines will require higher temperature and strength materials. Initially, Udimet 720 alloy (Ni-16Cr-2.5A1-5Ti-3Mo-14.7Co-1.25W) used for blades required powder metallurgical methods to prepare large disk forgings, but now SMC through the melting and refining process, as well as forging process research and improvement, has successfully prepared φ250mm diameter forging billets, and used in civilian and The forging billets are used in the engines of civil and military aircraft.

Introduction of pure nickel wire and nickel mesh

Pure nickel wire material is mainly used in the manufacture of electron tube cathodes, anode gate side bars, tube needles, etc. It has better mechanical properties and corrosion resistance to alkalis, such as sodium hydroxide. It also has better electrical, thermal and magnetic control characteristics. Applications include food and synthetic fiber processing, heat exchangers, and the chemical and power industries. Typical are the manufacture of resistance thermometers, internal parts of electron tubes, such as gate side bars, stubs and external parts of electron tubes, such as lead wires.

Brief analysis of supply and demand in China's high-temperature alloy industry

With the rapid development of China's aerospace, nuclear power and other fields in recent years, the market demand for high-temperature alloys has increased, driving the growth of China's high-temperature alloy production. Although China's high-temperature alloy industry is developing rapidly, but the overall technical level and the world's advanced level there is still a gap, high-end varieties have not yet achieved independent control, the supply and demand gap is large.