Archive for cobalt alloy

onsdag, december 19th, 2018

Nickel Alloy and Cobalt Alloy Electrode (Difference)

The development of China’s aerospace industry indicates that China’s comprehensive national strength has been further improved. From the completion of manned spaceflight to the present, it is inseparable from the efforts of all walks of life. Among them, the alloys widely used in aerospace technology are nickel-based alloys, Cobalt Chrome Alloy and cobalt alloy electrodes can be used, but the “strength mechanism” of the two alloys is different.

The high strength of the nickel-based alloy containing titanium and aluminum is due to the formation of a phase strengthening agent having a composition of NiAl (Ti). When the operating temperature is high, the phase strengthening agent particles are transferred to the solid solution, and the alloy quickly loses strength. The heat resistance of the Cobalt Alloy Plate is due to the formation of refractory carbides, which are not easily converted into solid solutions, and the diffusion activity is small. When the temperature is above 1038 ° C, the superiority of the cobalt alloy is revealed. This is just right for a high-efficiency, high-temperature engine.

Cobalt alloy is a hard alloy that is resistant to all types of wear and corrosion and high temperature oxidation. That is, the so-called cobalt chromium tungsten (molybdenum) alloy or stellite alloy (stellite alloy was invented by American Elwood Hayness in 1907). Cobalt alloys contain cobalt as a main component and contain a considerable amount of nickel, chromium, tungsten and a small amount of alloying elements such as molybdenum, niobium, tantalum, titanium, niobium, and occasionally iron. Depending on the composition of the alloy, they can be made into welding wire. The powder can be used for hard surface surfacing, thermal spraying, spray welding, etc., and can also be used for casting and forging parts and powder metallurgy parts.

The Cobalt Alloy is a general term for an alloy made of one or more of cobalt and chromium, tungsten, iron, and nickel. Tool steel containing a certain amount of cobalt can significantly improve the wear resistance and cutting performance of the steel. Stanley cemented carbide containing more than 50% cobalt does not lose its original hardness even when heated to 1000 ° C. Today, this hard alloy has become an important material for gold-containing cutting tools and aluminum. In this material, cobalt combines the other metal carbide grains in the alloy composition to give the alloy a higher toughness and less impact sensitivity. This alloy is welded to the surface of the part to make the part Life expectancy is increased by 3-7 times.

tirsdag, november 13th, 2018

The Quality of Cobalt Alloy Is Very Important

Cobalt Alloy is naturally ferromagnetic. The crystal structure of the cobalt alloy maintains its strength even at higher temperatures and has better wear resistance and corrosion resistance than other metals. These high performance alloys are commonly used in gas turbine blades and aircraft engines in the aerospace industry, as well as prosthetic components in the medical and dental industries.

The alloy particles used in high-quality cobalt alloy band saw blades are thicker and larger, because such carbide saw blades can withstand multiple sharpenings and have a long service life. In addition, the quality of the welding of cobalt alloys is also very important, the welds are thin and uniform, so that the saw teeth can withstand greater cutting forces.

In addition, the quality of the cobalt alloy saw blade is very important. Because the saw blade adjusts the rotation, it must not only transmit the cutting force but also maintain the stability of the work. The excellent cobalt alloy saw blade not only has static geometry and precision, but more importantly its dynamic characteristics. When the saw blade is continuously cut, the heat generated by the alloy band saw blade alloy sawtooth cutting is transmitted to the saw blade, which raises the temperature of the saw blade, and the high quality saw blade can maintain the accuracy of the state in this case. If a poor quality cobalt alloy saw blade is used, the saw blade warps will occur, which seriously affects the sawing accuracy.

The dynamic stability of Cobalt Alloy Blade and saw blades is especially important for the fineness of several cobalt alloy saw blades. How to ensure the quality of longitudinal unloading when a multi-blade sawing machine uses a set of unstable cobalt alloy saw blades.

torsdag, november 8th, 2018

Sytop Cobalt Alloy Bushing Brief Information

Cobaltalloy was established in the year of 2001, We are specialized in cobalt alloy marketing over ten years. With stable products quality, professional service, competitive prices, our customers range many countries and regions.

Product Details (Sytop Cobalt Bushing)

Sytop Cobalt Alloy Bushing is a Cobalt-Chrominum “superalloy” , they are resistance to wear ,corrosion and galling ,

also retain these properties in high temperature . that’s why it is super .

Cobalt Bushing and sleeve are the advantaged products for us , we have produced more than thousands specifications and all of them are produced upon customer’s drawing .

Co/Cr/W Alloy are famous with its great wear and corrosion resistance and mostly used in Oil & gas industry , steel industry , petrochemical industry, food industry , nuclear industry,etc.

With many years of experience in cobalt alloy, we rely on progressive production equipment and strong technician strength. We supply not only products, but also the professional suggestion on your application. We have large stock to keep the fastest delivery, in this way, our products are 100% quality guaranteed and delivery fast. Contact us and find out the right answer.

tirsdag, september 11th, 2018

Problems with Cobalt Alloy Powder Currently Used in Dentistry

Cobalt Alloy porcelain teeth Advantages: Cobalt alloy was first used for implant materials. Later, in Europe and the United States, in order to solve the allergic problem of nickel-containing metals, a cobalt-chromium alloy dedicated to porcelain restoration was developed, which does not appear alloy in the patient’s mouth. Discoloration. Cobalt-chromium alloy was first used in transplant medical treatment and used as a hip joint. This is also a sign of its biocompatibility, which is still in use today.

Metal additive manufacturing applications in dental processing require the use of metal powders that match the processing technology.

However, the cobalt-chromium alloy powder currently used in the manufacture of dental additive has the following problems:

1. Most of the cobalt-chromium alloy powders are processed by gas atomization method. The produced powder has poor sphericity, and there are many satellite spherical particles and poor fluidity, which directly affects the processing quality of additive manufacturing. Moreover, the cobalt-chromium powder prepared by gas atomization has a high oxygen content and a high nitrogen content, and the hollow ball is also present in the powder, resulting in pores inside the final molded part, which affects the use performance.

2. In order to ensure the subsequent mechanical properties, the current Stellite Plate powder will contain elements such as bismuth, cadmium and nickel, and the presence of these elements will affect the biocompatibility of the cobalt-chromium alloy. When the prosthesis is installed in the patient’s mouth, it will affect the patient’s health due to the precipitation of harmful metal ions.

3. The current cobalt-chromium alloy powders are basically produced for industrial production, so the physical and chemical parameters such as the particle size range and bulk density of the powder cannot be well matched with the additive manufacturing requirements.

Therefore, there is an urgent need for a method for preparing a cobalt-chromium alloy powder for dental additive manufacturing, which enables the prepared powder to meet the strict requirements of additive manufacturing and dental restoration.