Molybdenum News Center

TZM Alloy Properties

TZM alloy has many good properties, such as physical property, chemical property and mechanical property, including high melting point, high strength, high elastic modulus, small linear expansion coefficient, low vapor pressure, good electrical and thermal conductivity, high corrosion resistance and good high temperature mechanical properties , so it is widely used in various fields.

High temperature oxidation resistance property: TZM alloy has high melting point, so that it can be widely used in many field as a high temperature material. However, at high temperature, the alloy has poor oxidation resistance property can not form anti-oxidation layer to protect itself, so the oxidation rate is faster and service life is shorter at high temperatures. In order to improve high temperature oxidation resistance property of the alloy there are two methods: alloying and coating technology.

Room temperature and high temperature tensile mechanical property: Compared with molybdenum, TZM alloy room temperature tensile property is better, but not as good as the extension of molybdenum. Experiments show that at 1200 ℃, the tensile strength of molybdenum has been a significant decline, but the tensile strength of the TZM alloy remains at a high level. This is mainly because the second phase strengthening impacts TZM alloy’s property.

High temperature bending and creep properties: TZM alloy at high temperatures exhibited excellent bending property, but with temperature increase, the anti-bending property of TZM alloy is poor. TZM alloy creep property is related with temperature and stress intensity. With cyclic stress increasing, cyclic creep becomes more serious. In the same cyclic stress range, the temperature has large impact on creep property, as the temperature rises, the more obvious cyclic creep showing.

High temperature fatigue resistance: The study found that with the increase of the maximum cyclic stress, high temperature fatigue property continues to shorten, the elongation gradually increasing.

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