.

COMMON Valve Seat Coating MATERIALS

COMMON Valve Seat CoatingMATERIALS

Valve Seat: The detachable surface parts in valve are used to support the valve spool in the fully closed position and constitute a sealed part. Generally, valve seat diameter is the maximum flow diameter of the valve.

PRODUCT PARAMETERS FOR OUR high performance valve seat

This part can be illustrated by a table shown below:

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.


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