Classifications of Molybdenum

13.12.2019.

Molybdenum has high-temperature strength, good electrical conductivity, thermal conductivity, and low thermal expansion coefficient. Therefore, molybdenum bar products are widely used in the high-temperature furnace as heating body, structural parts, etc. Molybdenum rods are often used as electrodes in rare earth smelting and glass smelting industries. In addition, molybdenum and its alloy rod are also used for making various kinds of small molybdenum crucible, molybdenum ion implantation parts, molybdenum electrical light source parts, and molybdenum die parts.

Molybdenum based alloy is a kind of non-ferrous alloy with molybdenum as the matrix and other elements such as lanthanum, zirconium, titanium, niobium, and rhenium are added. Among them, TZM alloys are widely used in the manufacture of high-temperature tools, molds, and structural parts. The hot perforated top of seamless steel pipe made of molybdenum and TZM has been used extensively. The alloy of molybdenum lanthanum oxide doped with the appropriate amount of lanthanum oxide in pure molybdenum is also known as high-temperature molybdenum in the industry, which effectively increases the recrystallization temperature of molybdenum and reduces the deformation of the product within a certain temperature range, which improves the service life.



Molybdenum bar and molybdenum alloy rod have the following kinds of products.

Sintering molybdenum rods

Generally, the molybdenum bar should be forged to increase the density and improve the structure. However, for the products of molybdenum bars or moly piers with a diameter of more than 120 mm and single weight too large, the forging process cannot be carried out at present, and only the sintered products are provided. The surface of the sintered molybdenum bar is a silver-gray.

Forged molybdenum rod

The forged molybdenum bar is usually called a black molybdenum bar because of the existence of a layer of oxide on its surface. The surface of the forged molybdenum bar allows slight oxide film and forging hammer marks. The density and microstructure of the molybdenum bar are directly related to whether the blank of the molybdenum bar is fully deformed during the forging process.

Molybdenum strip and TZM strip

Molybdenum strip, TZM strip, and high-temperature molybdenum strip are used for ionic implantation parts as well as the manufacture of high-temperature tools, molds, and various structural parts blank. Due to the reason of use, the material density, tissue uniformity, mechanical strength, and other physical properties have higher requirements, so the requirements on forging technology are beyond the requirements of ordinary die forging round bar.

Molybdenum electrode rods

Molybdenum electrode rod is mainly used in glass smelting and rare earth smelting, which is made from molybdenum rods.

Molybdenum tube

Molybdenum tube is mostly used as gas or liquid in a high-temperature environment and is also used in thermocouple casing. Molybdenum tubes are machined to forge molybdenum bars, and the inner diameter of molybdenum tubes with length over 100 mm is usually required to be over 8 mm.

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