Heat treatment
of metal products in 3 days!

Recrystallization / Spheroidizing / Isothermal / Cycle annealing

size

8400x4000x2000

Maximum size of a metal workpiece
for heat treatment (LxWxH)

mass

100 тонн

Maximum charge weight for the heat treatment furnace

termo

100 — 1100 °С

Temperature range of the modes
of the heat treatment furnace

Technical characteristics of furnaces

for heat treatment of metal articles

Furnace №1

Parameter Value
Useable dimensions Length 8400 mm, width 4000 mm, height 2000 mm
Maximum charge weight 100 tons
Temperature range of heat treatment modes from 100 °С to 900 °С

Печь №2

Parameter Value
Useable dimensions Length 4000 mm, width 4000 mm, height 1900 mm
Maximum charge weight 30 tons
Temperature range of heat treatment modes from 100 °С to 1100 °С

all

7,5 ˚С

Temperature uniformity in furnace zones

time

10 – 999 ˚С/hour

Speed of heating and cooling (discreet)

flame

22

Pulse-firing burners with an integrated feeder system and a UV-flame control device

s7-300c

Siemens Simatic S7 controller
consists of:

  • • 4 dual PtRh-Pt thermocouples that monitor the furnace operating temperature;• 3 simple thermoelements PtRh-Pt to prevent overheating of the furnace;

    • data recording with a PtRh-Pt Yokogawa dot-record thermometer;

    • burner synchronization control;

    • furnace pressure regulation;

    • gas-air mixture regulation

Our experience in numbers

years

of work experience

thousand tons

of processed metal

We provided

services to 120 Russian companies

regular clients

are working with us

Photographs of furnaces for metal heat treatment

Heat treatment

a combination of heating, holding and cooling processes of hard metal alloys in a particular manner to alter their internal structure for obtaining a desired degree of physical and mechanical properties

Heat treatment of metal is required to:

  • eliminate the structural heterogeneity of castings, forgings, sheet and shaped metal;
  • remove residual stress and hardness after plastic deformation;
  • improve the properties of weld metal and various parts of the thermal impact zone;
  • remove residual stress in welded structures;
  • maintain the dimensions and shape of the product during machining and operation;
  • to provide resistance against intergranular corrosion of high-alloyed corrosion-resistant steels when used in corrosive environments;
  • Increase heat resistance and resistance to local damage during operation in high temperature conditions.

Who buys our services?

Military, chemical, petrochemical, machine-building, boiler, metallurgical, and pipeline companies.

Types of heat treatment of metals

Full annealing

Heating to 30-50 °C above Ac3, maintaining the temperature for 1-2 minutes for 1 mm of thickness. Cooling inside the furnace at a speed of 50-200 °C/hour (depending on the thickness).

Full annealing is used for pre-eutectoid steel mainly after hot forging and casting for grain refinement internal stress reduction.

Recrystallization annealing

Heating to a temperature of 630-700 °C (depending on the grade of steel), maintaining the temperature for 2.5 minutes for 1 mm of thickness, but not less than 1 hour. Cooling in air.

Recrystallization annealing is used to remove residual stresses and cold hardening caused by plastic deformation of metal during cold rolling, drawing or pressing.

Spheroidizing annealing

Heating to 20-30 °C above Ac1, maintaining the temperature for 2.5 minutes for 1 mm of thickness, cooling inside the furnace at a speed of 30-50 °C /hour to 700°C, maintaining temperature for 2.5 minutes for 1 mm of thickness, but not less than 1 hour. Cooling to 600 °C for 1 hour, then cooling in air.

Spheroidizing annealing is applied to hypereutectoid steels containing more than 0.65% carbon (for example, ШХ15 ball-bearing steels) to form a granular pearlite structure instead of lamellar.

Isothermal annealing

Heating to 30-50°C above Ac3, maintaining the temperature for 1-2 minutes for 1 mm of thickness. Cooling inside the furnace at a speed of 50-100 °C/hour to a temperature of 680-700 °C, holding for 2.5-3 minutes for 1 mm of thickness, but not less than 1 hour. Cooling in air.

Isothermal annealing is a heat treatment process in which steel is treated until complete transformation of austenite into pearlite and then cooled in still air.

Isothermal annealing is the best way to obtain fine granular structure for structural and tool steels, reduce hardness and enhance steel properties to meet machinability requirements for complex alloyed steels such as18Х2НЧВА.

Cyclic annealing

Heating to a temperature of 740 °C, maintaining the temperature for 2 minutes for 1 mm of the cross-section. Cooling at a speed of 50-100 °C/hour to 680 °C, maintaining temperature for 2 minutes for 1 mm of the cross-section. Repeat the cycle 2-4 times. Cooling in air.

Cyclic annealing with multiple (2-4 cycles) heating to 740 °C and cooling to 680 °C is used to achieve fine granular pearlite structure. This is mainly applicable for hypereutectoid carbon and alloyed tool and ball bearing steels.

Incomplete annealing

Heating to 840 – 860 °C, maintaining the temperature for 1,5-2 minutes for 1 mm of the wall thickness, but not less than 1 hour, cooling to 600 °C inside the furnace, then in the air.

Incomplete annealing is recommended to maximize hardness reduction, improve machinability and relieve stress.

Stabilizing annealing

Heating to 870 – 920 ˚C for 08H18N10T and 08X17N13M2T steel types. The temperature should not be lower than 950 ˚C. Maintaining the temperature for 2 – 3 hours regardless of thickness. Cooling in air.

Stabilizing annealing is used to remove residual stresses after cold deformation and restore resistance of weld metal and the weld zone to intergranular corrosion.

Normalization

Heating to 30-50 °C above Ac3, maintaining the temperature for 1-2 minutes for 1 mm of thickness. Cooling in air.

Normalization, with subsequent tempering or without it, is used to eliminate structural heterogeneity of forgings, castings, rolled metal and to refine the coarse-grained structure of the weld seam and the overheating zone in the heat affected area beside it after welding in high heat input modes (for example, electroslag welding).

It also eliminates structural heterogeneity of weld metal, improves machinability of steel and enhances its structure before quenching.

Austenization

Heating up to 1030-1070 °C, maintaining the temperature for 30 minutes at a thickness of less than 10 mm, 30 minutes + 1minute for 1 mm of thickness at a thickness of more than 10 mm. Cooling in air.

Austenitization is used for welded joints from chromium-nickel steels of austenitic grade and promotes their corrosion resistance, heat resistance, ductility and resistance to local damage during operation.

High temperature tempering

Heating to a temperature of 500-710 °C (depending on the grade of steel), maintaining the temperature for 2.5 minutes for 1 mm of thickness, but not less than 1 hour. Cooling in air.

High temperature tempering is used to remove residual stresses; improve the structure and properties of the seam, as well as the heat affected zone due to the transfer of non-equilibrium quenching structures into more equilibrium ones; to remove cold work hardening resulting from plastic deformation during welding, and also to eliminate deformation aging.

High temperature tempering can be intermediate (technological) and final.

Intermediate tempering

Heating to 30-50 °C below the temperature of the work hardening, maintaining the temperature for 2.5 minutes for 1 mm of thickness, but not less than 1 hour. Cooling in air.

Intermediate tempering is recommended to eliminate the danger of cracking after performing individual welding operations or cladding in cases of welding rigid joints and defect corrections with large volumes of weld metal used in certain technological processes. These parts and joints are subsequently subject to mandatory high temperature tempering.

Low temperature tempering

Heating to a temperature of 180-250 °C (depending on the grade of steel), maintaining the temperature for 2.5 minutes for 1 mm of thickness, but not less than 1 hour. Cooling in air.

Low temperature tempering is carried out at temperatures of up to 250 ° C. Tempered steel retains high wear resistance, but such product (if it does not have a viscous core) will not bear high dynamic loads. Cutting and measuring tools made of carbon and low-alloy steels are typically subject to low temperature tempering.

Metal heat treatment request form

Fill in the request form for heat treatment and we shall contact you within 15 minutes

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Number of tons*

Drawing of the article

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Work order flow

zayavka

01.

Send a request for metal heat treatment

zvonok

02.

We will call back and discuss details

kp

03.

We send you a quotation

dogovor

04.

We sign the contract, specification and invoice

termoobr

05.

We perform heat treatment of your product

sertificate

06.

We issue a passport for heat treatment of the part

otgruzka

07.

We ship your treated product

dostavka

08.

You get the finished product

We are at

Yekaterinburg city, Estonskaya 6, microdistrict Compressorny

germes-ural@bk.ru

Any more questions about heat treatment? Call us!

If you still have questions about heat treatment of metal articles, types of heat treatment or cost of the order, please call us during the working hours.

+7 (343) 264-81-23