Alloytic Daewha's Brochure

Alloy-TiC-Steel Bonded Titanium Carbide Alloy FOR ROLLER GUIDE ROLLER ON HIGH-SPEED BLOCKS Modern wire rod mills often reach an exit speed of over 100 m/sec. This high speed causes several problems on roller guides, roller breakage, bearing failure, short groove life, etc. Guide rollers rotate at an approximate speed of about 30,000 r.p.m. Since their failure function is to guide the rod, they are exposed to temperatures of 800 - 1,000℃ and high physical stress. Moreover, they are subjected to extremely high instantaneous acceleration from rest position to rod finishing speed. Because they come into contact with abrasive slags, the surfaces tends to pick up impure materials. Its lightness helps reduce loads / impacts on bearings, thus increasing their life and consequently saving maintenance / operation cost. Besides, it is slightly magnetic, thus minimizing the material pick-up.

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Alloy-TiC-Steel Bonded Titanium Carbide Alloy Advantages of Alloy-TiC® Guide rollers with the finest TiC

- Finest rounded grains for better lubrication and local friction mode. - Less wear on roller grooves, hence high output of the mill. - No breakage / galling / chipping of rollers during rolling. - Less stock removal per re-grind, hence longer life. - Uniformity and stability of the finished products. - High resistance to oxidation and less material pick-up on surface. - Reduced risk of bearing breakage and failure due to low density. The performance of Alloy-TiC® Guide Rollers on several rod mills has proved the clear superiority of titanium-cabides over traditional materials. Alloy-TiC® Guide Rollers are supplied ‘grooved’ with lapped surface.

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Alloy-TiC-Steel Bonded Titanium Carbide Alloy Chemical Composition & Mechanical Properties (Alloy-TiC SH45) Component (wt %)

TiC(vol %) 45

Cr

Mo

C

Fe

10

3

0.85

bal

Material

Alloy-TiC

T.C

Tool steel

Matrix

High Speed Steel

Co-Ni

Fe

Hard phase

TiC

WC

Fe3C

Manufacturing process

Powder metallurgy

Powder metallurgy

Casting & Milling

Hardness (HRC)

Tempered

68 ~ 72

55 ~ 62 68 ~ 76

Annealed

45 ~ 48

20 ~ 30

Density(g/cc)

6.45 ~ 6.50

14.0 ~ 15.0

7.9 ~ 8.5

TRS(Kgf/mm2)

180 ~ 190

200 ~ 230

60 ~ 100

Compressive strength (N/mm2)

3,500 ~ 3,800

3,200 ~ 4,200

2,000 ~ 2,700

Machinability

good

impossible

excellent

Life(Times)

20 ~ 30

20 ~ 30

1

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Alloy-TiC-Steel Bonded Titanium Carbide Alloy Application Details of Alloy-TiC

- Roller guide roller of steel mill - Polishing disk, capstan roll - Forming, Sizing, Seaming, Measuring and various rollers for Pipe and Tube - Aluminum Extruder dies and guide dies for insulated electric wire and core - Underwater pelletizer cutter knife & die plate - Kneader screw & paddle - Non-ferrous metal hot forging dies & punch - Various parts demanding corrosion, heat and wear resistance and excellent toughness compared to Cemented carbide

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