โลหะผสมSTELLITE®3

STELLITE-Alloy-3

คำอธิบาย

Stellite 3 consists of complex carbides in an alloy matrix. They are resistant to wear, galling and corrosion and retain these properties at high temperatures. Their exceptional wear resistance is due mainly to the unique inherent characteristics of the hard carbide phase dispersed in a CoCr alloy matrix.

Stellite 3 is an alloy possessing excellent abrasion and corrosion resistance for applications such as pump sleeves, rotary seal rings, wear pads, expeller screws and bearing sleeves. It retains its hardness at temperatures in excess of 760°C.The high carbon content of this alloy increases the volume fraction of carbides and hence its abrasion and solid particle erosion resistance. The high tungsten content improves its high temperature properties.

It has excellent metal to- metal wear resistance and resistsgalling when mated with other Stellitealloys. Stellite3 is well suited to applications involving extreme low- angle erosion and severe abrasion, with some sacrifice in toughness.The equivalent of Stellite3 for hardfacing materials like powders is known as Stellite1.

Corrosion Resistant:

Stellite 3 has excellent resistance to oxidation but is not recommended for reducing acids.

The typical electrode potential in sea water at room temperature is approx. -0.4 V (SCE).Stellite3 corrodes primarily by a pitting mechanism and not by general mass loss in seawater and chloride solutions.

Nominal Chemical Composition (Mass%):

ALLOYบริษัทCrWOther
Stellite3Bal.30.013.02.5Fe, Ni, Mn, Si

คุณสมบัติทางกายภาพ:

ALLOYHardnessความหนาแน่นMelting Range
Stellite348-63 HRC~ 8.7 g/cm3~ 1213 – 1285°C

Nominal Hot Hardness(HV Resp.DPH) as Cast:

20°C100°C200°C300°C400°C500°C600°C700°C800°C900°C
606573540508485453406330217140

Example for Tensile Properties at Room Temperature:

PRODUCT FORMUltimate Tensile Strength RmYield Stress Rp (0,2%การยืดตัว
Sand Casting, heat treated~ 490 MPaN.A.<< 1%

Product Forms:

Components
CastedPM / HIP parts*ALM parts*

Specifications:

UNS R30001, AWS A5.13 RCoCr-C, MIL-R-17131, SAE J775, MIL-C-15345 Alloy 22, MIL-C-24248.

Applications:

Surgical scissor inserts, valve seat inserts, needle holders, steel mill guide rolls, seaming rolls, sleeves, bushings, bearing balls, wear pads, burner nozzles, palm guides.