Typical grade

number

 CHEMICALCOMPOSITION(QUALITYSCORE)

AI

Fe

Si

Ni

Mg

Cr

Zi

P

Cu

Total impurity

QCr0.5

 

<0.1

 

<0.05

 

0.4-1.1

 

 

Remaining

<0.5

QCr0.5-0.2-0.1

0.1-0.25

 

 

 

0.1-0.25

0.4-1.0

 

 

Remaining

<0.5

QCr0.6-0.4-0.05

 

<0.05

<0.05

 

0.04-0.08

0.4-0.8

0.3-0.6

<0.01

Remaining

<0.5

Alloy grade

number

Main features

Application Example

QCr0.5

Under normal tempe rature and high temperature (400℃),the alloy boasts high strength,high hardness,high electrical and heat conductivity,high wearability,and frictiorreduction,After age hardening.its strength.hardenss.electrical andheat conductivitywill be improved greatly;Liable to welding and brae weldingp;high corrosion resistanceunder atmosphere and fresh water,high resistance against oxidation under higltemperature:it can be processed under pressure in cold and hot status;the weak poinis that it is sensitive to gap.which leads to stress concentration at gap and sharp pointmechanical damage so it is not suitable to make commutator segment.

Electrode of welder working under thetemperature lowerthan350℃, commutatoisegmentand other component working undeihigh temperature and requiring high strength,high hardenss and high electrical and heatconductivity.brake disk and round plate indouble-metal form

QCr0.5-0.2-0.1

Add small quantity of magnesium and aluminum to chrome-bronze;compared withQCr0.5.the heat resistance and corrosion resistance of the alloy are increased;it is lesssensitive to gap and other performances are similar with those of QCr0.5.

Electrode of rolling and spotwelding machine

QCr0.6-0.4-0.05

Add small quantity of zirconium and magnesium to chrome-bronze:comparecwith QCr0 5 the strenath.hardness and heat resistance of the alloy are increased aswell as high electrical conductivity

Same as QCr0.5