Volume heat treatment

Volume heat treatment involves heating the entire volume of a metal component to a specific temperature, followed by either rapid or gradual cooling, depending on the desired properties of the material. The purpose of this treatment is to alter the microstructure of the material, leading to changes in mechanical properties like hardness, toughness, wear resistance, and tensile strength. Processes under volume heat treatment include quenching, tempering, annealing, and normalizing.

It involves:

• Annealing (soft, diffusion, stress-relief)

• Quenching

• Normalizing

• Hardening

The maximum dimensions of the tempering workpiece are 1,200 mm diameter × 10,500 mm length, maximum weight 22,000 kg or 1,400 diameter × 3,000 mm length, maximum weight 3,500 kg

Heat treatment in salt bath

Heat treatment in a salt bath involves immersing the metal component in molten salt (usually chloride or nitrate salts), which has excellent thermal conductivity. Salt baths provide very uniform heating and precise temperature control, essential for ensuring consistent mechanical properties throughout the material. This method is commonly used for quenching, tempering, and annealing. Salt baths also allow for rapid and efficient heating and cooling of components.

The maximum dimensions of the workpiece that we offer when tempering tool and high-speed steels are 250 x 600 x 900 mm and the maximum weight is 60 kg.

Surface hardening

Surface flame hardening is a process in which the surface of a metal component is rapidly heated using a flame from a torch, followed by rapid cooling (usually with water). This process is used to increase the hardness and wear resistance of the material's surface, while the core remains softer and tougher. Surface flame hardening is often used to treat components like shafts, gears, and tool parts, where surface hardness is crucial, but internal toughness is also important.

Our offer includes surface flame and induction hardening of the following workpiece dimensions:

• Flame hardening of running wheels and gearwheels to M10 module with dimensions from D50 to D1100 x 350 mm; weight up to 850 kg.

• Flame hardening of running wheels and gearwheels to M40 module with maximal dimensions D2500 x 750 mm; weight up to 3000 kg.

• Flame hardening of axles and rolls with diameter D30 to D250 mm; maximal length 4600 mm and weight up to 3000 kg.

• Laths and guides with maximal dimensions 20 x 250 x 4600 mm and weight up to 3000 kg.

The achieved depth of hardened surface layer: 3-10 mm .

Induction hardening of rolls

Induction hardening is a method where the metal component is heated by an induction current generated by a high-frequency electromagnetic field. The heating is very rapid and localized, allowing for the treatment of specific areas of the component. After heating, rapid cooling follows, leading to the hardening of the material's surface layers. The process is precise and efficient, making it suitable for complex shapes without overheating the entire component. It is used to improve hardness and wear resistance in specific parts, such as gears, shafts, and rolles.

We offer induction hardening of shafts and cylinders with a diameter of D150 to D830 mm, a length of up to 5500 mm and a weight of up to 10000 kg.

Induction hardening of roll necks

Induction hardening of cylinder plugs is a specialized form of induction hardening designed to harden specific parts of cylinders, such as plugs. Plugs are parts of cylinders exposed to high loads and wear, so it's essential that they have a hard surface with a tough core. The process involves induction heating of the plugs, followed by rapid cooling. The goal of this process is to enhance wear resistance and material fatigue, thereby extending the lifespan of the cylinders.

Our services include induction hardening of roll necks with a diameter of D100 to D400 mm and the maximum weight is 6500 kg.

Vacuum hardening

Vacuum hardening is a heat treatment process that occurs in a chamber with very low pressure (vacuum). During the process, the material is heated to a specific temperature in the absence of oxygen, preventing oxidation and surface defects such as scaling or rust. After heating, controlled cooling follows, which can occur in a vacuum or using an inert gas like nitrogen.

Vacuum hardening is ideal for high-quality parts requiring precise mechanical properties and flawless surface finish, such as aerospace components, plastic injection molds, and medical devices.

The maximum dimensions of the workpiece covered by our offer are 750x900x3700 mm and the maximum weight is 1500 kg.