耐食性

耐チッピング性

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34

耐摩耗性

Explanation

Applications

Chipping-resistance

Corrosion-resistance Wear-resistance

EW10, EW25, EW40LINE UPCEMENTED CARBIDE FOR MAGNETIC STEEL SHEET PROCESSING - EW GRADE

Optimized resistance balance of wear, chipping and corrosion.Suppresses cracking and chipping which often occur on processing magnetic steel sheet.

High hardness, toughness and corrosion-re-sistant cemented carbide

CEM

ENTE

D CA

RBID

E FO

R M

AGN

ETIC

STE

EL S

HEET

PRO

CESS

ING

- EW

GRA

DE

When compare to other grade which is same hardness, there is possibility that resistance of chipping and defects will be improved without dropping hardness because fracture toughness is relatively high. Corrosion-resistance is excellent also.

Magnetic steel sheet.For wear-resistant parts which has concern about chipping or defect, EDM process or WEDM (water type) processing in prolonged manufacturing.

Component design High hardness

High toughness

Physical properties of EW grade

Characteristics

EW10 91.0 3.5 15

Our gradeHRA

Hardness Fracture toughness value

14.8

DensityTRS[GPa] [MPa・m1/2]

EW25

EW40/ Typical figures

/ Typical figures

88.0 3.5 29 13.989.5 3.5 22 14.3

×103 kg/m3 {g/cm3}

Our gradeHRA

Hardness Fracture toughness value DensityTRS[GPa] [MPa・m1/2]

EW25 89.5 3.5 22 14.3KD20 90.0 3.7 16 14.2WD20 90.5 3.7 16 14.1MC20 90.0 2.8 19 14.9

×103 kg/m3 {g/cm3}

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35

Performance of corrosion-resistance

0

2

4

6

8

10

mg/

(m2

h)D

ecre

ase

in c

orro

siven

ess

Positioning in corrosion-resistant cemented carbide

[MPa・

m1/

2 ]

91 92 93 94 959088 89876

8

10

12

14

16

18

20

22

24

26

28

30

32

Hardness

Circle size indicates TRS.

2.94

6.58

G4 KD20 EW250.00

ワイヤ放電加工の加工液（水）に 100 時間浸漬後の値

EF01EF05EF10

EF20

MC20

G2

G4

G3

ME40

EW10KD05KD10

KD30

KD40

Frac

ture

toug

hnes

s val

ue

EW25

EW40

WD20KD20

G grade’s data is for reference.

Improvement of corrosion-resistance

G grade

KD grade

EF grade

WD grade

EW grade

EW10, EW25, EW40LINE UP

After 100 hours immersion during WEDM (water type) process.

CEMENTED CARBIDE FOR MAGNETIC STEEL SHEET PROCESSING - EW GRADE

CEMEN

TED CARBIDE FOR M

AGNETIC STEEL SHEET PRO

CESSING - EW

GRADE

EW25

WD20

KD20

MC20 By metallurgical microscope (×1000)

Micrographs