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ADDITIONAL PROCESSES AND TECHNOLOGIES
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HEAT TREATMENT
Heat treatment is done with a heat treating furnace “SDO-125” – Bulgaria. Tmax=1000 o C;
The dimension of the working chamber is: 2200 x 1000 x 1000 mm. The following processes are performed there:
- stress relieving of castings from gray cast irons;
- ferritizing annealing of castings from nodular cast iron.
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PRIMING
At the customer’s request priming of castings can be accomplished.
CONTROL
Chemical control, control of mechanical properties, hardness, metallographic analysis, sand examination
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Central laboratory
The chemical laboratory has a vacuum spectrometer “Spectrolab” with 24 elements and built in computer.
The metallographic laboratory has technology for metals structure testing including microscope “Neophot” 2.
The mechanical tests of the metals are made with other machines for hardness, toughness and tensile strength.
The tests of sands and paints are carried out in a separate part of the laboratory with the devices “Georg Fischer”.
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All the devices have undergone obligatory tests, calibration and certification by licensed institutions.
Dimension control
Dimension control is performed by qualified personnel with a large scale of devices and appliances for measurements upon a table for tracing of the castings.
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Magnetic particle examination
At customer’s request magnetic particle examination can be done.
CERTIFICATES
“Leiarmach” JSC – Sofia issues a certificate for the quality of the product as follows:
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* Certificate for chemical control;
* Certificate for mechanical properties, hardness and metallographic analysis;
* Certificate for dimension control;
* Certificate for magnetic particle examination;
* Heat treatment’s diagram;
* Certificate for sand examination and others.
The personnel of “Leiarmach” JSC – Sofia have the necessary professional qualification, knowledge and experience for the production of castings of high quality.
“Leiarmach” JSC has incorporated system for control and management of the quality and owns a license for work according ISO 9001/2000.
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