Application of Vacuum Tempering Electric Furnace in the Machinery Industry

Vacuum tempering electric furnace (vacuum tempering furnace) is widely and crucially used in the automotive machinery industry, mainly reflected in the following aspects:

1. High precision heat treatment of core components
Gear parts: Automotive gearbox gears need to balance high hardness and toughness. The vacuum tempering furnace avoids oxidation through a high vacuum environment (vacuum degree below 10 ⁻ ³ Pa), significantly reduces deformation, improves the uniformity of the infiltration layer, reduces subsequent processing volume, and improves production efficiency.
Bearings and shaft parts: Vacuum tempering treatment can eliminate quenching stress, prevent cracking, improve surface smoothness, reduce friction loss, and extend service life. For example, after vacuum tempering, the fatigue life of car wheel hub bearings is improved.
Spring components: such as automotive suspension springs, vacuum tempering can eliminate the risk of decarburization, maintain stable surface carbon content, and ensure elastic performance and corrosion resistance.

2. Performance optimization of mold and tool steel
Mold steel: Automotive cover mold requires high wear resistance and impact resistance. The vacuum tempering furnace avoids surface oxidation and decarburization of the mold, reduces heat treatment defects, and improves mold life and processing accuracy through precise temperature control (± 5 ℃) and uniform heating.
High speed steel cutting tools: such as those used in automotive engine processing, vacuum tempering can eliminate quenching cracks, improve red hardness and cutting performance, and reduce tool replacement frequency.

3. Heat treatment support for lightweight materials
Aluminum alloy parts: Under the trend of automotive lightweighting, aluminum alloy engine cylinders, wheels, etc. require vacuum tempering treatment to eliminate stress, prevent deformation, maintain surface gloss, and improve corrosion resistance.
Magnesium alloy parts, such as car steering wheel frames, can be vacuum tempered to avoid oxidation and improve material strength and toughness.

4. Efficient implementation of special process requirements
Low temperature annealing and aging treatment: The vacuum environment can accurately control the annealing temperature and time, eliminate processing stress, stabilize the microstructure, and is suitable for the final processing of automotive precision parts.
Bright tempering: By filling high-purity nitrogen gas for protection, oxidation is avoided, achieving a bright and corrosion-resistant surface of the parts, reducing subsequent cleaning processes, and lowering costs.

5. Typical application cases
Automotive engine blades: A certain aviation engine enterprise uses a vacuum tempering furnace to treat nickel based alloy blades. Through the “solid solution+aging” process (1400 ℃, vacuum degree 10 ⁻⁴ Pa), the high-temperature strength of the blades is improved and the fatigue life is extended.
Automotive transmission shaft: A certain car company has reduced the bending deformation of the shaft body and improved the qualification rate by vacuum tempering 42CrMo steel transmission shaft to eliminate quenching stress.
New energy vehicle battery tray: After vacuum tempering, the aluminum alloy tray has increased tensile strength and significantly improved corrosion resistance, meeting the dual requirements of lightweight and safety.