Heat Treatment for Hand Tools Industry

Heat Treatment for Hand Tools Industry

At JNS Heats, we design and manufacture precision-engineered heat treatment furnaces specifically tailored for the hand tools industry.

Our furnaces deliver uniform heating, energy efficiency, and repeatable metallurgical results — ensuring every tool achieves the required hardness, strength, and durability.

The Heat Treatment for Hand Tools Industry is a combination of heat, pressure, and precision control — transforming solid aluminium billets into continuous, uniformly shaped profiles that meet exact dimensional and mechanical requirements.

Overview

The performance of hand tools such as spanners, wrenches, hammers, pliers, chisels, and screwdrivers depends heavily on their heat treatment process.
Proper heat treatment transforms the steel’s internal structure, enhancing its toughness, wear resistance, and strength while maintaining ductility to prevent brittleness.
At JNS Heats, our systems are designed to control temperature, time, and atmosphere precisely — giving tool manufacturers full control over hardness profiles and microstructure consistency.

Typical Heat Treatment Processes for Hand Tools

1. Normalizing

This process relieves internal stresses from forging or machining.
Tools are heated to a specific temperature and air-cooled to refine grain structure — ensuring uniform mechanical properties before hardening.

2. Hardening (Austenitizing & Quenching)

The tool steel is heated to its austenitizing temperature (typically 800–900°C) and then rapidly cooled (quenched) in oil, polymer, or air, depending on the alloy type.
This increases hardness and wear resistance, forming a tough martensitic structure essential for cutting and striking tools.

3. Tempering

After hardening, the tools are reheated at a lower temperature (150–500°C) to reduce brittleness while maintaining hardness.
Tempering imparts the right balance of toughness and elasticity, extending tool life and preventing fractures under heavy use.

Case Hardening / Carburizing (Optional)

For certain tools, surface hardening is required.
In this process, tools are heated in a carbon-rich environment, creating a hard outer surface with a tough, ductile core — ideal for impact and wear resistance.

Types of Furnaces Used

Batch Type Furnace – Ideal for small to medium-scale production
Continuous Conveyor Furnace – For high-volume, automated tool processing
Box Type Furnace – For flexibility in heating different tool sizes
Salt Bath Furnace – For precise, rapid, and uniform heating during hardening or tempering
Tempering Furnace / Oven – Controlled temperature cycles for consistent results

Each furnace is designed with energy-efficient burners, precise temperature control systems, and durable insulation materials to reduce fuel cost and ensure stable operation.

Why Choose JNS Heats