Tungsten steel uses, tungsten cobalt alloy uses

Tungsten steel (cemented carbide) has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance, especially its high hardness and wear resistance, even at a temperature of 500, it remains basically unchanged, and it still has a high hardness at 1000.

Tungsten steel, also known as tungsten carbide, refers to a sintered composite material containing at least one metal carbide. Tungsten carbide, cobalt carbide, niobium carbide, titanium carbide and tantalum carbide are common components of tungsten steel. The grain size of the carbide components (or phases) is usually between microns, and the carbide grains are held together using a metal binder.

Binders are usually referred to as the metal cobalt (CO), but can also be used for some specific applications, such as nickel (Ni), iron (Fe), or other metals and alloys. For a composition combination of a carbide and a binder phase to be determined, it is called a "grade".

Tungsten steel belongs to cemented carbide, also known as tungsten titanium alloy. The hardness can reach 89 95HRA, because of this, tungsten steel products (common tungsten steel watches) have the characteristics of not easy to be worn, hard and not afraid of annealing, but brittle.

The main components of tungsten carbide are tungsten carbide and cobalt, which account for 99% of all components, and 1% is other metals, so it is also called tungsten steel.

It is often used in high-precision machining, high-precision tool materials, lathes, percussion drill bits, glass knife heads, and tile cutters. It belongs to the list of rare metals.

Tungsten steel (cemented carbide) has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance, especially its high hardness and wear resistance, even at a temperature of 500, it remains basically unchanged, and it still has a high hardness at 1000. Tungsten carbide is widely used as a material, such as turning tools, milling cutters, planer cutters, drills, boring cutters, etc., for cutting cast iron, non-ferrous metals, plastics, chemical fibers, graphite, glass, stone and ordinary steel, and can also be used to cut heat-resistant steel, stainless steel, high manganese steel, tool steel and other difficult-to-machine materials. The cutting speed of the new cemented carbide is equal to hundreds of times that of carbon steel.

Tungsten carbide (cemented carbide) can also be used to make rock drilling tools, mining tools, drilling tools, measuring tools, wear-resistant parts, metal abrasive tools, cylinder linings, precision bearings, nozzles, etc.

It is harder than tool steel and is an excellent material for molds.

It can be used as aerospace, ordnance, cutting tools, molds, medical equipment and drill bits and other materials.

Tungsten cobalt alloy is also known as tungsten carbide-cobalt cemented carbide. According to the cobalt content, it can be divided into three categories: high cobalt (20% 30%), medium cobalt (10% 15%) and low cobalt (3% 8%).

This kind of cermet can be manufactured according to the usual special ceramic batching, forming and other processes, but the firing should be based on the nature of the blank and the quality of the finished product to control the sintering atmosphere for vacuum or reduction atmosphere.

Generally, it is carried out in carbon tube electric furnace, hydrogen molybdenum wire electric furnace, and high-frequency vacuum furnace. The grades of this kind of cemented carbide produced in China are YG2, YG3, YG3X, YG4C.

Hardness:

Hardness is one of the main mechanical properties of cemented carbide. As the cobalt content in the alloy increases or the carbide grain size increases, the hardness of the alloy decreases.

For example, when the cobalt content of industrial WC-CO increases from 2% to 25%, the hardness HRA of the alloy decreases from 93 to about 86, and the hardness of the alloy decreases by 1 degree for every 3% increase of cobalt, and the hardness of the alloy can be effectively improved by refining the grain size of tungsten carbide.

Compressive Strength:

The compressive strength of tungsten carbide is the ability to resist compressive loads. The compressive strength of WC-CO alloy decreases with the increase of cobalt content of the alloy, and increases with the finening of tungsten carbide phase grains in the alloy. As a result, fine-grained alloys with a lower cobalt content have higher compressive strength.

Tungsten cobalt alloy is the product of the physical combination of metal cobalt and metal tungsten, tungsten cobalt alloy is generally a black alloyed powder, mainly used as cemented carbide, high ratio alloy materials, cemented carbide binder and magnetic materials, diamond saw blades, etc.

The appearance of tungsten cobalt alloy coating is close to that of chromium plating, and the dispersion ability and coverage ability of the plating solution are good. Here, the effects of sodium tungstate, cobalt sulfate, additives, current density and pH value on the content and properties of tungsten coating were studied. Tungsten cobalt alloy has good corrosion resistance, heat resistance and wear resistance, and has good application prospects.

1. Structural parts: tungsten steel is used as a structural part of many products, such as transformation sealing rings, shortening machine pistons, lathe chucks, grinding machine mandrels, bearing journals, etc.

2. Die: tungsten steel used as various types of molds accounts for about 8% of the total production of tungsten steel, including drawing dies, cold heading dies, cold extrusion dies, hot extrusion dies, hot forging dies, forming dies and drawing tube mandrels, such as long mandrels, spherical rods, floating rods, etc., in recent years, the amount of rolling wire rods has grown rapidly, and the tungsten steel drill bits for rolls in China have accounted for 3% of the total production of tungsten steel.

3. Geological mining tools: Geological mining tools are also a major use of tungsten steel. China's tungsten steel for geology and mining accounts for about 25% of the total production of tungsten steel, which is mainly used for drill bits for percussion drilling, drill bits for geological survey, down-the-hole drills for mining and oilfields, cone drills, coal cutter picks, building materials property impact drills, etc.

5. Wear-resistant parts: Wear-resistant parts made of tungsten steel include nozzles, guide rails, plungers, balls, tire cleats, snow shovel plates, etc.

6. Cutting tools: tungsten carbide drill bits can be used as various cutting tools. The amount of tungsten steel used in China's cutting tools accounts for about one-third of the total tungsten steel production, of which 78% is used for welding tools and 22% is used for indexable tools.

The tungsten steel for CNC tools only accounts for 20% of the carbide steel for indexable tools, in addition to the integral tungsten steel drill bit, the overall tungsten steel small garden saw blade, tungsten steel micro drill and other cutting tools.

7. Other uses: tungsten steel is becoming more and more widely used, and has been inexhaustibly expanding in civilian scale in recent years, such as bracelets, watch cases, zipper pulls for high-end bags, tungsten steel trademarks, etc.

High-speed tungsten steel is often used in the production of equipment such as saw blades, faucets, and drill bits. Due to its resistance to abrasion, it is also sometimes used in hand tools such as chisels and kitchen knives.

In addition, tungsten is the main alloying element in some hot-working tool steels (steels used in the production of high-temperature tool steels). In addition, thermally operated tool steels must also withstand pressure (thermal shock) caused by rapid temperature changes. Hot-worked tungsten steels typically contain a high chromium component and sometimes vanadium.

It is used in extrusion and forging dies and other equipment for processing heated metals.

Typical representative products of tungsten steel series materials are: round bar, tungsten steel plate, tungsten steel strip, etc.

Mold materials include tungsten steel progressive die, tungsten carbide drawing die, tungsten steel drawing die, tungsten steel wire drawing die, tungsten steel hot extrusion die, tungsten steel cold stamping die, tungsten carbide forming and punching die, tungsten carbide cold heading die, etc.

The representative products of mining products include tungsten steel excavation teeth, tungsten steel gun bits, tungsten carbide drill bits, tungsten carbide drill bit teeth, tungsten carbide down-the-hole drill bit teeth, tungsten carbide cone bit teeth, tungsten carbide coal cutter picks, tungsten carbide hollow drill bit teeth, etc.

Wear-resistant materials include tungsten steel sealing rings, tungsten steel wear-resistant materials, tungsten steel plunger materials, tungsten steel guide rail materials, tungsten steel nozzles, tungsten steel grinding machine mandrel materials, etc.

Tungsten steel is mainly used in tool materials! And it is made of steel carburizing as the main material! It is mainly used as a cutting tool material to play a hard role in heat treatment!

Summary. Hello, dear, tungsten in steel can promote the grain refinement of steel, increase the tempering stability, hot hardness and thermal strength of steel, and increase the wear resistance of steel due to the formation of special carbides, which is mainly due to the fact that tungsten carbide in steel is very hard. When tungsten is added to high-carbon steel, its wear resistance and machinability can be significantly improved.

Therefore, it is mainly used in tool steels, such as high-speed steel, hot forging dies, etc., and only in individual special cases, it is used in carburizing and quenching and tempering structural steels for machinery manufacturing. However, it must be added at the same time with other elements such as silicon, manganese, aluminum, molybdenum, vanadium, chromium, nickel, etc., and a single tungsten-containing structural steel can not be improved much compared with carbon steel in terms of mechanical properties, so it is rarely used. Tungsten is resistant to high-pressure oxygen intrusion and can also improve the creep resistance of steel at high temperatures, which is even more effective when combined with molybdenum.

Hello, dear, tungsten in steel can promote the grain refinement of steel, increase the tempering stability, hot hardness and thermal strength of steel, and increase the wear resistance of steel due to the formation of special carbides, which is mainly due to the fact that tungsten carbide in steel is very hard. When tungsten is added to high-carbon steel, it can significantly improve its wear resistance and cutting resistance. Therefore, it is mainly used for tool steel ridges, such as high-speed steel, hot forging dies, etc., and only in individual special cases, it is used in carburizing and quenching and tempering structural steel for mechanical manufacturing.

However, it must be added at the same time with other elements such as silicon, manganese, aluminum, molybdenum, vanadium, chromium, nickel, etc., and a single tungsten-containing structural steel can not be improved much in terms of mechanical properties compared with carbon steel, so it is rarely used. Tungsten is resistant to high-pressure oxygen intrusion and can also improve the creep resistance of steel at high temperatures, which is even more effective when combined with molybdenum.

Tungsten (W) has the characteristics of high melting point and high density, similar to molybdenum, and is also a precious metal pure modified element. Tungsten mainly exists in the form of simple carbides (such as WC, W2C, W3C), or with iron carbide to form compound carbides (such as WC FE2C, 3WC FE3C or 3W2C 2FEC) and iron tungstenide.

About 50% of the tungsten ore mined in the world is used for the smelting of high-quality steel, about 35% for the production of hard steel, about 10% for the production of tungsten wire, and about 5% for other purposes.

Tungsten can be used to manufacture guns, rocket propulsion nozzles, armor-piercing bullets, metal cutting blades, drill bits, superhard molds, wire drawing dies, etc., tungsten is widely used, involving mining, metallurgy, machinery, construction, transportation, electronics, chemical industry, light industry, textile, military industry, aerospace, science and technology, various industrial fields.

Tungsten is widely used in modern technology in the state of pure metal and in the state of alloy, the most important of which are alloy steel, tungsten carbide-based cemented carbide, wear-resistant alloy and strong heat alloy. Tungsten carbide has high hardness, wear resistance, and refractory properties. The cutting speed of tungsten carbide tools far exceeds the cutting speed of the best tool steel tools.

Tungsten carbide is mainly used for cutting tools, mining tools and wire drawing dies, etc.

Alloys of tungsten and other refractory metals (e.g. tantalum, niobium, molybdenum, rhenium) are used as thermally strong materials in aeronautical rocket technology, as well as in other sectors that require high thermal strength of machine parts, engines and some instruments.

China's tungsten ore is generally distributed in the eastern coastal area of Guangdong on both sides of China's Nanling Mountains, and the main production areas of foreign tungsten ore are Canada, Russia, the United States, North Korea, Mongolia and other countries.