Are you interested in heat treatment, hardening and annealing of low alloy structural steel? Supplier Evek GmbH offers to buy low-alloy structural steel in any quantity at an affordable price in a wide range. We provide delivery of products to any point of the continent. The price is optimum.

Types of heat treatment. Tempering .

At high tempering (whose temperature is in the range 550 ... 650 ° C), the structure of steel does not change, but reduced (and even removed completely) the residual stresses that arise in particular after welding. The remaining techniques - low and medium tempering - are used to fully or partially restore the original level of mechanical strength. Such tempering also reduces cracking and any fragile metal hydrides that may be present in the surface layers;

Annealing

Annealing is used in the pretreatment of steel alloys that contain a high percentage of manganese and silicon, elements that reduce the ductility of steels when they are pressed;

Normalization

Normalizing corrects structural defects in rolled steel, but is also used to improve subsequent machinability. The temperature of normalization is determined by the percentage of carbon: from 900 ... 940 ° C for steels with 0,1 ... 0,2% of carbon, up to 850 ... 900 ° C for steel alloys containing 0,2 ... 0,3% of carbon.

Hardening

The technology is used to give the materials the necessary strength, hardness, resistance to fatigue stresses and corrosion. After welding, hardening restores the original level of most mechanical properties that are reduced by welding.

Cooling

When working out the technology, attention is paid to the cooling rate of metal after quenching. This speed is tended to be as low as possible in order to avoid internal stresses. Evek GmbH offers to buy a wide range of welded structural steel at an affordable price. We provide delivery of products anywhere in the continent. The price is optimal.

Classification of steels by heat treatment conditions

10G2, 09G2S, 10HSND grades. After welding in these steels there are nonequilibrium structures like martensite, which leads to local hardening of the metal. Heat treatment - high tempering, which increases ductility and impact toughness;

15Г2АФ, 17Г2САФ or 12Г2ФАЮgrades. All the above steels form fine-dispersed carbide and carbonitride structures during hardening. Therefore, the optimal type of heat treatment of such steels is considered to be thermomechanical treatment, when heating and subsequent plastic deformation occurs in a given temperature range. Subsequent hardening is not required;

17G1S, 16GS, 30KhGSAgrades. These steels are heat hardenable, so after quenching, possibly some reduction in their strength characteristics, which is corrected by the introduction of high-temperature operation.

Buy. Furnizor, price

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