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Spheroidal Graphite Ferritic Rolls

In spheroidal graphite rolls/rings, the formation of carbide to some extend will be prevented, thanks to ferrite structures surrounding graphites in matrix. In this way, its resistance to thermal cracking is very high. It offers high pass/performance, which is resistant to wear and the depth of hardness is virtually unchanged throughout the barrel. It is preferred in roughing stands that require high mechanical strength.

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Spheroidal Graphite Pearlitic Rolls

Spheroidal graphite pearlitic rolls are resistant to wear and have thermal conductivity due to the carbides formed as a result of spherical graphite and Cr-Ni-Mo alloying. In order to remove the internal stresses that occur during solidification according to the alloy amounts, stress relief heat treatment is applied to increase their mechanical strength. It is generally preferred in all Bar, Coil and Light profile stands, Heavy-medium sections iron intermediate and finishing stands.

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Spheroidal Graphite Bainitic Rolls

Spheroidal graphite bainitic rolls have high toughness and wear resistance thanks to bainite formed in struc- ture by alloying and heat treatment, similar to pearlitic rolls. Generally they are preferred for thick section fin- ishing stands and straightening-side rollers.

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Spheroidal Graphite Acicular Rolls

In addition to spheroidal graphite, spheroidal grafite acicular rolls include, bainite or acicular (bainite+martensite) which is formed as a result of high Ni-Mo alloying in structure. They have high wear resistance and also high thermal shock resistance. In order to remove the internal stresses and residual austenite after casting, low temperature and long-term tempering heat treatment is applied. It is generally preferred in rod, rib, wire rod finishing machines, light figured iron intermediate and finishing group and straightening and side rollers.

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Spheroidal Graphite + Acicular Rolls

Spherical graphite acicular+rolls have higher toughness strength than SGAC rolls. Generally it is preffered for slit, dog-bone or finish stands of bar and light section rolling mills.

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Alloy Steel Based Rolls (Adamite)

Adamite rolls containing 1.5-2.5% Carbon and Cr-Ni-Mo have high wear resistance as a result of high carbon and alloying. Microstructure and mechanical properties are improved by applying normalization and stress relief heat treatments. It is generally preferred in roughing stands and intermediate stands in all rolling groups.

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Graphitic Steel Based Rolls

Unlike Adamite rolls, some of the carbon is nucleated as graphite rather than carbide. The graphite formed reduces the friction coefficient In this reason, wears are less on the side-walls of deep grooved graphitic steel rolls. Moreover, thanks to the fine graphite formed, it is resistant to thermal cracks and prevents oxide-layer formation. GSB is preferred in all stands of sections.

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Edm Tube

EDM Tube is developped for our tube and light section producer costumers. EDM Tube is spheroidal graphite cast iron which is alloyed with Mn, Ni,Mo, Cu EDM tube has high toughness and high wear resistance in this reasons it minimizes crushing and breaking on the groove surfaces and edges in narrow cross-section passes. It is preferred in Plug, Sizing, Straightening stands in the production of seamless tube and seamed tube.

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