Heat treatment of metals and metalurgy

The tempering plant AVC, a. s. Čadca is equipped with devices and appliances allowing heat treatment of products, i. e. they allow maximum use of characteristics of metals and consequently decrease their consumption.

  • Annealing - it consists of heating to a temperature, maintaining the temperature level and consequent low cooling. The aim of annealing is to eliminate unbalanced, and to reach a balanced condition of material. From the point of view of pre-crystallizing, we arrange the following:
    • annealing without pre-crystallizing, when stage changes do not occur
    • annealing with pre-crystallizing, when stage changes occur - they significantly influence the final conditions of a product
  • Heat treatment with unbalanced structure - we include a procedure, the aim of which includes reaching an unbalanced structure. Then follows another heating cycle, which returns the state of the set close to balanced conditions. In our case of this group, we realize the following:
    • hardening, the aim of which is reaching a non-stable structure of martensitic type
    • tempering, i. e. heat treatment of a hardened product, which leads to a structure closer to balanced conditions,
  • Thermal-chemical treatment - in this case we change the structure as well as the composition of surface layers. In case of this method, there occurs a diffusion saturation of surface by selected non-metals. In the AVC, a. s. Čadca tempering plant we perform the following:
    • cementing
    • nitro-cementing

For the above-mentioned methods of heat treatment we use chamber, rotation, continual and depth type furnaces with controlled atmosphere. The department of metallurgy arranges works necessary for reaching required quality in the tempering plant. It includes a control of chemical composition of material, chemical composition of surface layers, end-atmosphere, hardness of core and surface, as well as control of structure and course of hardness in surface layers.

Tempering plant

  • A continual cementing and hardening furnace of the type Aichelin. Hour output 80 kg/hour.
    Established technology:
    • cementing + under cooling
    • hardening + washing + tempering
  • A continual cementing and hardening furnace of the type Aichelin. Hour output 100 kg/hour
    Established technology:
    • cementing, nitrocarburizing + under cooling
    • hardening + washing + tempering
  • A continual cementing and hardening furnace of the type Aichelin. Hour output 120 kg/hour
    Established technology:
    • cementing, nitrocarburizing + under cooling
    • hardening + washing + tempering
  • Multi-purpose furnaces Aichelin. Hour output 450-500 kg/hour
    Established technology:
    • cementing + under cooling + tempering
    • cementing + under cooling + tempering, refining,
    • nitro-cementing
  • 4 continuous furnaces of IPSEN type (2 psc of double-chambers and 2 psc of single-chambers)
    Established technology:
    • cementing + under cooling + tempering
    • nitro-cementing + hardening + refining
  • Carousel tempering furnace + washing machine + tempering furnace of the type Aichelin. Hour output 200-250 kg/hour
    Established technology:
    • hardening, washing, tempering
  • Battery of furnaces of the type Monocarb consisting of:
    1 psc of hardening furnace
    1 psc of under cooling furnace
    1 psc of washing machine
    2 psc of tempering furnace
    Established technology:
    • hardening + tempering
    1 psc of rotation furnaces of the type Aichelin. Hour output 15-30 kg/hour for parts of small dimensions.
    Established technology:
    • cementing, nitro-cementing, hardening
    2 psc of generators + application devices for high-frequency
    Established technology:
    2 psc of annealing carriage furnaces without protective atmosphere

Metallurgy

  • Spectrometer POLYVAC E 950 for chemical analyses, setting of the following elements: C, Mn, Cr, Ni, Si, W, V, Mo, P, S
  • Hardness meter EMCO test M4U 250
  • Microscope NEOTHOP 32
  • Hardness meter Struers DURAMIN A 300
  • Struers TegraPol-35
  • Equipment for grinding and polishing of samples after Heat treatment
  • Struers LaboPress-3
  • Equipment for pressing of samples after Heat treatment

Company presentation

Presentation in PDF includes information about our production program and sales structure.

Download the company presentation [pdf]

Actual job offers

Document includes actual job offers list.

Download actual job offers list [doc]

Address

AVC, a.s.
Ul. Slobody 1360
022 11 Čadca
Slovak republic

tel: +421 41 4301 522
fax: +421 41 4301 511

Map - how to find us [pdf]