COMMON Valve Seat Coating MATERIALS

name

Description

Chemical composition

Max thickness

Hardness

Bond strength

Porosity

Limit temperature

Costing

characterlzation

mm

MPa

%

℃

WC-CoCr

WC86/Co10/Cr4

Co：9-11

Cr：3.5-4.5

C：3.5-4.5

W: Bal

1

1100-1500

>75

<1%

482

• Good abrasive resistance at low temperature
• Compared with WC-Co, its oxidation resistance

and corrosion resistance are improved.

• The coating is compact and hard

WC-Co

WC88/Co12

Co：11-13

C：3.6-5.5

W：Bal

2

1050-1200

>75

<1%

454

• Good abrasive resistance at low temperature.
• Limited oxidation resistance and corrosion

• The coating is compact and hard.

WC-Co

WC83/Co17

Co：16-18

C：4.8-5.5

W: Bal

2

950-1100

>75

<1%

454

• Good abrasive resistance at low temperature.
• Compared with WC-12Co, its abrasive resistance

is poor, but toughness, impact strength and ductility are better.

• The coating is compact and hard.

Cr3C2-NiCr

75Cr3C2/25NiCr

Ni：16-21C：9-11

Cr：11

B：2.2

Si：4

Fe：2.7

C：0.4

Ni：Bal

1

750-900

>75

<1.5%

871

• Good abrasive and sliding abrasive performance

of abrasive-resistant materials at high temperatures.

• Good corrosion resistance.