Alloytic Catalog

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CENTRIFUGAL CASTING Excellent wear resistance HighPerformance

.Advantages I

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High Speed Tool steel "Hi-REX" manufactured by centrifugal casting contains] more than 30% of expensive alloy materials (Cr,Mo,W,Ni,Co,V etc). It has very slow decrease of Hardness at high temperature, so that it keeps its high wear resistance, its unique mechanical property of toughness guarantees low cracking, which makes productivity increase. At the request of customer it can varies its hardness. It has been proven that "Hi-REX" is superior to other traditional materials. Currently we are exporting "Hi-REX" all over the world. "Hi-REX" is being used and proven its superiority in steel company's mill roll, gUide roller, pinch roller etc and chemical industry's screw, paddle, buss screw etc

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.Excellent wear resistance at high temperature High performance . Less stock removal for grinding High resistance to oxidation and friction wear. .Uniformity and stability of the finished products . Less material pick-up on surface.

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.Properties Density ( gfcm3 )

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Hardness(Hs)-for hot working for cold working

75 I 88

Transverse Rupture Strength TRS ( kgfmm2) Young's Module ( kgfmm2) I Tensile Strength ( kgfmm2) I

8.5 - 8.8

- 85 - 95 I 150 - 180 I

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Three RoU Rings (KOCK~ ROLLS) Steel Wire Rod Mill Roll RingS Copper Wire Rod Mill Roll - Deformed Bar Mill Roll Rings, Screw, Buss Section Mill RoUer RingS, Looper Roller Roller, Guide Roller, Pinch Roller, Sizing Roller Slit Guide Roller, Cutting Wheel, Twist RoUer

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38,000 - 110 I

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.Applications -

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RIIUY-,llI - rl-lS P/AI Tool Steel

.Imoaet resistant .Wear resIstant -Good Toughness .Easy Regrinding

.Manufacturing Process

+ "Gas: atonization

HIP

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Pro.Qerties

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Properties

COMPOS,

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C

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(wt%)

Cr

Mo

5-5.5

1-2

Density (glcnf )

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nwell "C" Hardness (HRc )

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Hardened

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Trans"""", Rupture StrengIh TRS ( MPa.)

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Modulus Eta_fly . Ib) Toughnessof (ft

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( GPa.)

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6.9- 7.5

~-~ 54

-58

Si

Fe

0.5-1

Sal

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4, 136

j

221 47

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I. (fndorm distribut ion of fine VanadiumCarbide(VC), No prosity 9 high toughness and high wear resistance. - Finer carbide distribution 9 easy regrinding - PowderAfetallurgical Product 9 less deformation during heat-treatment

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HSS(High SpeedofSteel) higher volume fine VC : higher wear resistance

than commercial

. Applications

- Guide Holler

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and !fork Holl for wire rod, round bars & reinforcing Pinch Holl, Looper Holls, !fear Parts

Hot !fork Tooling, Knives,

bars.

Alloy-

TJ8C@GUJ8de Roller

.Wear resistant .Imoact resistant .Tough .Light weight

.Advantages of "Alloy-TiC" Rollers -Less wear on roller grooves, hence larger output of the mill . -Less stock removal per regrind, hence the longer life. -Reduced risk of bearing breakage and failures. - Uniformity and stability of the finished products. -No breakage of rollers during rolling. -High resistance to oxidation and less material pick-up. -Relatively low price

.Composition

Composition (wt%)

TiC

Fe

Cr

Mo

Other

45(vol%)

55-57

5.5-7.0

1.8-2.4

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Properties . TiC Conttent: 45vol% . Hardness{service state) . Dencity : 6.5g/cul . Bending Strenth{TRS) : . Compressive Strength:

: 69-71HRc

1800Mpa 3800Mpa . Coefficient of thermal expansion (CTE) : lO.6xlO-6/"C . Thermal conductivity: 20W/mk

. Remachining . .

Method

Machine: CNC Lathe Tool: Insert Bite (RNGN1204:Round), (SNGN120430: Square)

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Bite: Ceramic ( Whisker & Reinforced)

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Product Compay (Country)

NTK (Japan)

Taegu tech

Grade

WAl, WA2

AB20

Ssangyong

ST300 J

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RPM: 100 300 Feed: O.lmmlrev

. Depth of Cut:

0.02 - 2mm

. Remachining Method - First of all, you have

to make chamfers before machining of grooves of the rollers. It prevent chipping of the conner when the bite is coming out from a roller. - H'henyou machine the groove you have to have a depth of machining as deep as the worn out depth at first stage. - After the first stage of machining, precise machining has to be done by

the depth of O.02mm- O.lmm.