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Pit Type Vacuum Annealing Furnace

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Pit Type Vacuum Annealing Furnace
Details
The pit type vacuum annealing furnace is a vertical batch heat treatment system designed for high-precision thermal processing under controlled vacuum or protective atmosphere conditions. It is particularly suitable for spheroidizing annealing and soft annealing of wire rods, fasteners, and alloy steel components where surface integrity and metallurgical consistency are critical.
This furnace configuration minimizes oxidation, decarburization, and contamination during heat treatment, ensuring superior surface quality and repeatable process performance.
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Pit Furnace
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Description

Typical Applications and Materials

Fasteners & Wire Rods

Spheroidizing annealing of carbon steel and alloy steel wires used in automotive and industrial fasteners.

Bearing Components

Heat treatment of bearing steels requiring controlled microstructure and uniform hardness.

Precision Mechanical Parts

Suitable for components that demand clean surface finish and minimal metallurgical variation.

Vacuum & Protective Atmosphere System

The furnace is equipped with a controlled atmosphere system that supports vacuum operation as well as protective gas environments such as nitrogen or methanol-based decomposition gas. This ensures oxidation-free processing and prevents surface decarburization during long thermal cycles.

  • •Vacuum-assisted heating environment
  • •Optional nitrogen or RX gas protection
  • •Stable atmosphere control for consistent metallurgical results

Processing Characteristics

Oxidation-Free Surface

Ensures clean surface finish without scale formation after annealing.

Controlled Decarburization

Maintains carbon content within strict metallurgical tolerances.

High Spheroidization Rate

Achieves uniform carbide distribution for improved machinability.

Technical Data Overview

Model Power Max Capacity Chamber Size
TE-A-MH-E-100/200 145KW 4T Φ1000×2000mm
TE-A-MH-E-240/240 320KW 16T Φ2400×2400mm
TE-A-MH-E-360/340 580KW 32T Φ3600×3400mm

• Maximum Temperature: 850°C

• Temperature Uniformity: ±5°C

• Control Mode: PLC + PID

Engineering Design Features

  • •Vertical pit structure for efficient loading of coil materials
  • •High-strength furnace shell with optimized sealing design
  • •Multi-layer insulation with ceramic fiber modules
  • •Forced convection system for uniform heat distribution
  • •Integrated cooling system to shorten process cycle time

Custom Engineering Options

CHTEE provides tailored vacuum annealing furnace systems based on specific process requirements and production capacity.

  • •Vacuum level and atmosphere configuration
  • •Loading size and coil handling system
  • •Temperature range and heating rate
  • •Automation and control integration

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