Tungsten steel (tungsten carbide) has a series of excellent properties such as high hardness, wear resistance, better strength and toughness, heat resistance, corrosion resistance, etc. In particular, its high hardness and abrasion resistance, even at a temperature of 500 ° C is basically unchanged at 1000 ° C is still very high hardness.
Tungsten steel, also known as cemented carbide, is a sintered composite material containing at least one metal carbide composition. Tungsten carbide, cobalt carbide, niobium carbide, titanium carbide, and tantalum carbide are common components of tungsten steel. The carbide component (or phase) typically has a grain size of between 0.2 and 10 micrometers, and the carbide grains are bonded together using a metal binder. The binder usually refers to the metal cobalt (Co), but for special applications, nickel (Ni), iron (Fe), or other metals and alloys may also be used. The compositional combination of a carbide and a bonding phase to be determined is called a "grade".
Tungsten steel is classified according to ISO standards. This classification is based on the material type of the workpiece (e.g. P, M, K, N, S, H grades). The bonding phase composition is mainly utilized for its strength and corrosion resistance.
Tungsten steel matrix consists of two parts: one is the hardened phase; the other is the bonding metal. The bonding metal is generally iron group metals, commonly used is cobalt, nickel. Thus there are tungsten-cobalt alloys, tungsten-nickel alloys and tungsten-titanium-cobalt alloys.
Tungsten-containing steel, such as high-speed steel and certain hot work die steel, steel containing tungsten on the steel hardness and heat resistance has a very significant increase, but the toughness will be sharply reduced.
The main application of tungsten resources is also tungsten carbide, also known as tungsten steel. Cemented carbide, known as the teeth of modern industry, tungsten steel products are used to a very wide extent.
Long-term waste tungsten steel recycling, waste tungsten steel, tungsten steel, high-speed steel, perennial recycling more tungsten steel : lxhsxcj
Hello, do Baidu advertising is divided into SEO and SEM. the former is free of charge, and the latter need to spend money, and a lot of money.
The former can do Baidu know, Baidu bar, Baidu library, Baidu baby, Baidu experience, Baidu encyclopedia and so on.
The latter can do anything as long as they have money, bidding, information flow. There are also a wide range of portals and so on, as long as the flow of platforms are large can be done.