How to Avoid TZM Rods from Splitting During Processing Nuzzle Tips for Hot Runner System?

Pure molybdenum has very high melting point, which makes it useable in most high temperature applications. However, with the development of molybdenum alloy, titanium-zirconium-molybdenum (TZM) alloy has become a good all-round candidate no matter in vacuum furnace industry, medical diagnostic equipment industry or other industries. 

Although TZM alloy products are expensive than pure molybdenum, in certain applications the additional cost is offset by its increased strength at elevated temperatures. 

People add trace elements such as titanium and zirconium to molybdenum to remove the grain boundary embrittlement phase through solid solution strengthening of trace elements, and its reactant acts as a dispersed phase to strengthen the alloy to improve its performance. 

The suggested applied temperature is between 700 and 1400 degrees Celsius. Like pure molybdenum, it starts to oxide at 400 degrees Celsius, and rapidly oxides at above 500 degrees Celsius. However, at operating temperatures exceeding the recrystallization temperature of pure molybdenum (900 to 1,100 degrees Celsius), TZM is much stronger. And in load-bearing applications exceeding 1300 degrees Celsius, TZM is twice as strong as pure molybdenum.

In the vacuum furnace industry, TZM is the material of choice for load-bearing hearths and horizontal posts; in the medical diagnostic equipment industry, it is used as the material of choice in rotating anodes in X-ray tubes; in hot runner system, it can be machined into nuzzle tips and keep plastic in melt status. 

However, when applied in hot runner systems, TZM rods will be machined into nuzzle tips, and during this process, some problems may occur, such as split, cracking, unmachinable, tools easy to be damaged, or debris easy to stick on tools. 

Reasons for these problems are complex, for example, when tools are easy to be damaged during processing, it probably shows signs that TZM rods has high hardness. However, it cannot be assured it is the problem of hardness, the selected tools may also cause this problem. If you require lower hardness, debris are easy to stick on the surface of tool. Therefore, there should be a comprehensive solution for these problems. 

Chinatungsten is a professional manufacturer of molybdenum. Our knowledgeable and experienced refractory metal sales engineers are standing by to help you select the best metal for your application and solve whatever problems you meet. 

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

Fax: +86 592 5129797

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Wear-resistant Nozzle: TZM Rods for Plastic Injection Molding

Manufacturers of plastic components or tool manufacturers of such components represent a growing market. More companies need more and more types and larger quantities of plastic materials in the industrial field. In 2019 the operating income of China's 15,835 enterprises above designated size was 1,907.748 billion yuan, and this figure continues to rise.

Along with this growing demand, requirements for materials and their performance are also increasing. Plastic manufacturers demand maximum strength for materials. This is why glass and carbon fibers can be integrated into the material to reinforce the particles. In order to improve fire resistance, highly corrosive flame retardants are also used. Therefore, all components in contact with the plastic injection molding must have maximum wear resistance and corrosion resistance! Only in this way can maintenance be minimized during the entire tool life.

In the nature of things, the titanium-zirconium-molybdenum alloy (TZM) has great dimensional stability and is extremely wear-resistant, meeting the requirements of the plastics industry for the two crucial parameters of thermal conductivity and corrosion resistance. Because of this, the nozzles of hot runner systems at home and abroad are basically processed by TZM rods.

The TZM molybdenum nozzle can reduce the size to the minimum and help improve the space efficiency of the compact hot runner system; the runner is small and smooth, which saves materials while realizing a reliable injection molding process and ensuring high-quality products; the nozzle is manufactured from highly conductive material that transfer precise heat to the gate area for minimal gate vestige and excellent gate marks.

Chinatungsten Online has commanded the entire process chain of molybdenum rods from raw materials to finished products. With more than 20 years of professional production experience, we can provide you with the most favorable and high-quality products to help you maintain your industry competitiveness.

If you have any inquiry of TZM molybdenum rods, 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.