Differences of Tungsten Crucible Made by Sintering and 3D Printing

To be used for rare earth metal smelting, induction furnace heating element, quartz glass smelting, sapphire crystal growing furnace, ect., the material should be extremely refractory, such as clay, graphite, tungsten, molybdenum, china clay, or quartz or hard-to-melt metallic iron because the usual working temperature is above 2000℃.

Tungsten metal is the most popular one among them given that its smelting point is high to 3610℃. Especially for sapphire crystal growing furnace, the crucibles made from tungsten metal plays a key role in success rate of seed crystals and the quality of pulling crystals during the growth of sapphire crystals.

How is a tungsten crucible produced? Generally speaking, it can be divided into spinning, stamping, forging and sintering according to different manufacturing processes. For most types of crucibles, they are formed by sintering. 

For sintering crucibles, they have very high purity, high density, precise size and smooth surface, which are deeply loved by many users. They are usually manufactured by the isostatic pressure. The isostatic pressure-sintering mainly includes a batch of raw materials, powder loading, isostatic pressure pressing, high-temperature sintering, machining, finished product inspection, and other procedures. 

However, there is a new producing method for this product and the method is getting more and more popular among the world – 3D printing. 3D printing in tungsten or molybdenum can deals with many problems that sintering can not resolve now, for example, if you need a part very urgently, how can you get it within a few days? with a 3D metal print machine, you can get it in three to seven days. 

Meanwhile, it can also offer the ability to manufacture complex parts without the need for tooling. Tungsten crucible can be produced more cost effectively and faster by using it. Parts made by this method can be highly detailed and thin. Details as small as 100 μm with a positional accuracy down to 25 μm can be achieved.

It also has its drawback – cost highly. With the development of technology, the cost is reduced greatly compared to before. For small and complex parts, it is worth trying. Kindly contact Chinatungsten Online if you have any inquiry. 

If you have any inquiry of tungsten crucible, please feel free to contact us:

Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

Why Tungsten Flux Can Be Used in the Carbon and Sulfur Analyzer as Additive

Tungsten flux is a kind of coarse particle made by breaking tungsten bars instead of sintered tungsten powder with purity of over 99.9%. There are others name for it, such as tungsten accelerator, tungsten chip accelerator, tungsten particles and tungsten granule. 

Owing to its unique physical and chemical properties, it is widely used in many fields, for example, it is very suitable as a catalyst in a carbon and sulfur analyzer, used as a filler for shielding materials or used in radiation protection doors and baffles. Meanwhile, it is also suitable as a counterweight filler. 

Why tungsten flux is used as the flux during the combustion process of high frequency furnace in the analysis of infrared carbon and sulfur? 

With a melting point of 3380°C, tungsten is the most difficult metal to melt. However, the metal is easy to oxide. Tungsten begins to oxidize and emit a lot of heat when oxygen is passed through at 650°C. The infrared carbon-sulfur analyzer has the characteristics of high instantaneous heating value and fast reaction speed, so tungsten particles are needed as additive.

Some people may consider this product only as flux, actually, it can be used as additive. In the infrared carbon-sulfur analyzer, tungsten granule also generates heat, adjusts the acidity and alkalinity of the medium, stirs, catalyzes, stabilizes combustion, and anti-interference. Its roles are important and multiple.

With the help of the flux, the accuracy of the measurement value tested by carbon and sulfur analyzers can be effectively improved. The carbon and sulfur analyzer can quickly and accurately analyze the carbon and sulfur content in solid and fluid materials such as carbon steel, high, medium and low alloy steel, pig iron, gray cast iron, ductile iron, alloy cast iron, various iron alloys, ferrosilicon, ferromanganese, nickel iron, lithium iron, ferrochromium, rare earth metals, and coke, coal, slag, catalyst, ores and so one. 

As a professional manufacturer over two decades, Chinatungsten Online provides high-purity tungsten granule as well as many other parts. Please contact us if you have any inquiry. 

If you have any inquiry of tungsten flux, please feel free to contact us:
Email: sales@chinatungsten.com/sales@xiamentungsten.com
Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.