The characteristics of tantalum and tantalum alloy induction heating

The physical metallurgical properties of tantalum and tantalum alloys determine that its induction heating before plastic deformation has the following characteristics:

① The density of tantalum is inferior to that of tantalum, platinum, rhenium, gold, tungsten, and uranium. It is a high-density material among commonly used engineering materials.

② Metals with a melting point above 2000°C are called refractory metals. Among all refractory metals, tantalum is second to tungsten and rhenium, higher than molybdenum and niobium, and is the third metal.

③ The thermal conductivity of tantalum is higher, more than twice that of titanium, more than three times that of zirconium and stainless steel, and four times that of nickel-based alloys.

④ Tantalum and its alloys are non-magnetic materials.

⑤ Tantalum and its alloys have excellent room temperature processing properties and low ductile-brittle transition temperature.

⑥ Tantalum and its alloy are stable in air at room temperature. With the increase of temperature, the oxidation rate is accelerated.

Tantalum can absorb oxygen, hydrogen, nitrogen, carbon-containing gas, halogen-containing gas, etc., and form a corresponding solid solution or compound.

The heating temperature of plastic deformation processing of tantalum and tantalum alloys is generally over 1000℃. During the heating process, due to the affinity of tantalum and its alloy with oxygen and the rapid diffusion rate of oxygen in tantalum alloy, a large amount of oxygen is absorbed on the surface of the workpiece and an oxide layer is generated.