The vertical tubular heat treatment electric furnace is an industrial equipment that combines the structure and heat treatment function of a vertical tubular furnace. Its core design revolves around a vertical furnace and a tubular heating chamber, and achieves the heat treatment process of metal materials through precise temperature control and atmosphere control. Let's take a detailed look at the vertical tube heat treatment electric furnace below!

A commonly used vertical tubular heat treatment electric furnace (click on the image to view product details)

1. Core structure and design advantages
Vertical furnace layout
The furnace body adopts a vertical structure, and materials are added through the top of the furnace and heated in the vertical furnace before being discharged from the bottom. This design greatly reduces the equipment footprint and is suitable for scenarios where laboratory or production line space is limited. For example, in the preparation of semiconductor materials, vertical structures can reduce the impact of thermal convection on chips and improve the uniformity of oxidation and deposition processes.

Tubular heating chamber
Heating elements (such as resistance wires and silicon carbide rods) are evenly distributed around the tubular furnace, and the heat naturally rises in the vertical direction, forming a gradient temperature field. Taking metal heat treatment as an example, this design ensures uniform heating of the workpiece during annealing and quenching processes, avoiding deformation or cracking caused by local overheating.

Modularity and Scalability
The equipment supports single temperature zone or multi temperature zone configuration, and the furnace tube material (quartz, corundum, metal) and diameter length can be customized according to process requirements. For example, the preparation of lithium battery positive and negative electrode materials requires the introduction of inert gas protection, and in this case, a more sealed metal furnace tube can be used; The ceramic sintering process tends to favor high-temperature resistant quartz or corundum furnace tubes.

2. Adaptability of heat treatment process
Metal material reinforcement
Annealing treatment: By precise temperature control (± 1 ℃), internal stress in the metal is eliminated and plasticity is improved. For example, after annealing in a vertical tube furnace, the elongation of aviation aluminum alloy has been greatly improved.
Quenching and tempering: The equipment supports rapid heating (up to 40 ℃/min) and atmosphere protection, which can achieve martensitic transformation control of high-strength steel, greatly improving hardness and toughness.

Semiconductor precision machining
In the heat treatment of silicon chips, a vertical tube furnace is protected by a vacuum environment (which can be pumped up to 10 ⁻ ³ Pa) and hydrogen/argon gas to avoid the formation of an oxide layer, ensure the surface flatness of the chip, and meet the requirements of integrated circuit manufacturing.

Ceramic and Glass Forming
Ceramic sintering: The equipment supports high-temperature sintering above 1600 ℃, and by precisely controlling the heating rate (adjustable from 1 ℃/h to 40 ℃/min), high-density alumina ceramics can be prepared.
Glass hot bending: With a vertical structure combined with gradient temperature control, it can achieve progressive bending forming of automotive glass with minimal curvature radius error.

3. Technical parameters and performance indicators
Maximum operating temperature: 300 ℃ -1800 ℃ (depending on the material of the furnace tube), mainly used for metal melting and ceramic sintering.
Temperature control accuracy: ± 1 ℃ (PID intelligent temperature control system), semiconductor material annealing.
Heating rate: adjustable from 1 ℃/h to 40 ℃/min, suitable for rapid heat treatment processes.
Furnace size: diameter 60-300mm, length 500-2000mm, suitable for workpieces of different sizes.
Atmosphere control: Multiple gases such as vacuum/hydrogen/argon/nitrogen are introduced to carry out oxidation protection and reduction reactions.

4. Industry Applications and Cases
In the field of new energy vehicles
In the preparation of positive and negative electrode materials for lithium-ion batteries, the vertical tube furnace can improve the gram capacity of ternary materials (NCM/NCA) and reduce the initial efficiency loss by optimizing the heating curve (such as segmented heating to 1200 ℃).

Aerospace industry
The heat treatment of titanium alloy parts needs to be carried out in a vacuum environment to prevent high-temperature oxidation. The vertical tube furnace can achieve precise control of the α+β phase region of titanium alloy by pre vacuuming to 10 ⁻ Pa and introducing argon gas, thereby improving the fatigue life of the parts.

Research experiment scene
In the study of material phase transition, the equipment supports in-situ observation function (requires high-temperature microscope), which can monitor the grain growth process of metals in real time between 800 ℃ and 1200 ℃, providing data support for the design of new alloys.

5. Selection suggestions
Process requirement matching
If dealing with easily oxidizable materials (such as titanium alloys), priority should be given to models with vacuum function;
For large-sized workpieces (such as ceramic discs with a diameter greater than 200mm), it is necessary to confirm the furnace opening size and load-bearing capacity.

Energy consumption and efficiency balance
Although silicon carbon rod heating elements have lower costs, their lifespan (about 2000 hours) is shorter than that of silicon molybdenum rods (5000 hours); If operating under high load for a long time, it is recommended to choose the latter to reduce maintenance costs.

Safety and Compliance
The equipment should be equipped with overheat protection, disconnection alarm and other functions to ensure safe operation.

Customized vertical tube heat treatment electric furnace with preheating system (click on the picture to view product details)

In general, vertical tube heat treatment electric furnaces have numerous advantages and a wide range of applications. Before choosing, you can communicate with relevant technical personnel about the parameters you need, so as to customize a more suitable vertical tube heat treatment electric furnace for your own production or experiment!Click to learn more Vertical tube furnaces! Or click on online customer service to learn more about product information!