There are also some disadvantages in using TZM alloy for hot runner nozzles, including the following aspects:
High cost: Compared with common metal materials such as steel or aluminum alloy, the cost of TZM alloy is relatively high. This increases the manufacturing cost of hot runner nozzles and may limit their widespread use in certain applications.
Difficult to process: TZM alloy is difficult to process due to its high hardness and high melting point. Machining and forming TZM alloy nozzles with complex geometries can require more time, resources and specialized equipment for manufacturers and fabricators.
Heavy weight: Compared with light metal materials, such as aluminum alloy, TZM alloy has a higher density, so the hot runner nozzle made will be relatively heavy. Weight can be a limiting factor in some applications, especially for systems that require fast movement and precise control.
Weldability limitations: TZM alloys have poor weldability, which can pose certain challenges to the hot runner nozzle fabrication and repair process. Special welding techniques and materials may be required during the welding process to ensure a good connection.
Possible corrosion problems: Although TZM alloys have certain corrosion resistance, they may still be affected by corrosion to a certain extent in certain corrosive environments. Especially in applications involving acidic or alkaline media, additional corrosion protection measures may be required.
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