Large-diameter tungsten bar annealing device and annealing process

Abstract

The invention relates to the technical field of metal heat treatment, and discloses a large-diameter tungsten bar annealing device and annealing process. The annealing device comprises a first trough,a feeding device, a hydrogen protection box, an induction coil, an IGBT high-frequency induction power supply, a discharging device, a second trough, a motor, an electric control cabinet and a cooling system. The large-diameter tungsten bar annealing device and annealing process provided by the invention can achieve the effects that the internal stress of the large-diameter tungsten bar can be effectively eliminated; the phenomena of splitting, edge breakage, surface micro-cracks and the like which possibly occur in subsequent processing are avoided, the processability of the tungsten bar isimproved, the service life of consumables such as machining tools is prolonged, the service performance of the tungsten bar is improved, and the high-temperature service life of the tungsten bar is prolonged, have the advantages of being high in speed, high in quality, low in cost and convenient to maintain, can guarantee smooth implementation of industrial production, and achieve the reduction ofproduction cost and improvement of the production quality.

Description

technical field [0001] The invention relates to the technical field of metal heat treatment, in particular to a large-diameter tungsten rod annealing device and an annealing process. Background technique [0002] Because of its extremely high melting point, low vapor pressure, low expansion and dimensional stability at high temperature, excellent electron emission performance and high temperature mechanical properties, tungsten alloy is widely used in national defense industry, electronics, electric light source, Chemical, medical, machinery and many other fields. The large-diameter tungsten rods sintered at high temperature can be used as rods with qualified density after multi-pass and large compression ratio forging processing, and the deformation can reach more than 60%. This kind of rods can be used as raw materials for further mechanical processing. [0003] Under the action of alternating stress, the internal stress of the tungsten rod accumulates rapidly. When the s...

AI Technical Summary

Problems solved by technology

[0003] Under the action of alternating stress, the internal stress of the tungsten rod accumulates rapidly. When the stress in some areas is too concentrated, the tungsten rod will appear splitting and dimensional instability during press processing; Such as chipping of parts, surface (micro) cracks, excessive consumption of machining tools, etc.; when applied to related fields, the life of tungsten rod parts at high temperatures is insufficient, or even unusable

The main reason for the above problems is the stress existing inside the large-diameter tungsten rod, which reduces the processing performance and serviceability of the large-diameter tungsten rod.

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