Pit Type Furnaces for Annealing

Product Introduction

Our Pit Type Furnaces for Annealing are specialized vertical heat treatment systems designed for the precise and uniform annealing of long, heavy, or vertically oriented components. Annealing is a critical heat treatment process used to soften materials, improve ductility, relieve internal stresses, and refine grain structure, making them more workable and less brittle. These furnaces are installed in a pit below floor level, allowing for easy loading of tall parts by overhead cranes. The vertical design ensures uniform heating and controlled cooling, which is vital for achieving consistent mechanical properties throughout components like shafts, rods, and tubes. Ideal for industries requiring high-quality annealing of elongated parts, our pit type annealing furnaces provide exceptional temperature uniformity and precise control over the annealing cycle, ensuring optimal material performance and reliability.

Technical Specifications

Working Principle

Pit type furnaces for annealing operate by heating long or vertically oriented components to a specific temperature, holding them at that temperature for a set period, and then slowly cooling them to achieve desired metallurgical properties. The process begins with loading the workpiece into a basket or fixture, which is then lowered into the pit furnace from above using an overhead crane. The furnace is sealed, and the components are heated uniformly to the desired annealing temperature, typically above the recrystallization temperature but below the melting point. After the soaking period, the furnace slowly cools the material, often by controlled furnace cooling or slow air cooling, to allow for grain growth, stress relief, and the transformation of the microstructure to a softer, more ductile state. The vertical design ensures excellent temperature uniformity for long components, which is crucial for consistent annealing results and preventing distortion.

Process Flow

Solving Customer Pain Points