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TZM/Molibden - Tungsten alloy
TZM and Molybdenum , Molybdenum is similar to tungsten, with a melting point of 2,620 ℃ (4,753oF), slightly lower than tungsten.
The elongation capacity is better than tungsten, so it is more suitable for producing thin wires. Molybdenum is transformed into TZM by using small amounts of extremely thin carbides, containing more than 99.2% up to 99.5% of Mo, 0.50% and 0.08% of titanium, zirconium and carbide.
TZM is more resistant to pure molybdenum and has a higher re-crystallisation temperature and better sliding resistance. The recommended operating temperatures are between 700 and 1 400 ° C.TZM is used in high temperature applications involving strong mechanical stresses, for example in forging tools.
For its features such as high resistance at high temperatures and good thermal conductivity, the TZM alloy is used to produce mould parts for gravity casting and die casting of aluminum castings or those subject to erosion by liquid metal . TZM matrices are also used in the extrusion of Copper alloys.
Chemical and physical characteristics:
Melting point: 2620 ° C
Density: 10.15 g / cm3
Coeff. Of dilation:
At 20 ° C ͂6.0 m / m ° C
At 1000 ° C ͂5.8 m / m ° C
At 1500 ° C ͂ 6.5 m / m ° C
At 20 ° C 125 w / m ° C
At 1000 ° C 95 w / m ° C
At 1500 ° C 85 w / m ° C
Tensile strength: 590-790 MPa
Hardness: 230-320 DPH10