QCr0.5 Chrome Bronze

What Is QCr0.5 Chrome Bronze?

QCr0.5 chrome bronze has high strength and hardness at room temperature and high temperature (400°C), good electrical and thermal conductivity, abrasion resistance and anti-friction properties. After aging hardening treatment, the strength, hardness, Both electrical conductivity and thermal conductivity are significantly improved.

Chinese name: QCr0.5 Chrome Bronze
Grade: QCr0.5
Standard: GB/T 13808-1992
Sample size: diameter 18～160

●Characteristics

QCr0.5 chrome bronze has high strength and hardness at room temperature and high temperature (400°C), good electrical and thermal conductivity, abrasion resistance and anti-friction properties. After aging hardening treatment, the strength, hardness, Electrical and thermal conductivity are significantly improved; easy to weld and braze, have good corrosion resistance in the atmosphere and fresh water, high temperature oxidation resistance, can well withstand pressure processing in cold and hot states; but its The disadvantage is that it is more sensitive to the notch, causing stress concentration at the notch and sharp corners, which is easy to cause mechanical damage, so it is not suitable to be used as a commutator piece.

●Application examples:

Manufacture of welding machine electrodes, motor commutators and other parts that work at high temperatures and require high strength, hardness, conductivity and conductivity with working temperature below 350℃. It can also be used in the form of bimetal for brakes. Plates and discs.

●Chemical composition:

Copper Cu: margin
Nickel Ni: ≤0.05
Iron Fe: ≤0.1
Chromium Cr: 0.4～1.1
Note: ≤0.5 (impurities)

●Mechanical properties:

Note: Longitudinal room temperature tensile mechanical properties of bars

●Heat treatment specification:

The hot working temperature is 900～950℃; the quenching temperature is 950～1000℃ water cooling; the tempering temperature is 400～450℃.

QCr0.5-0.2-0.1

QCr0.5-0.2-0.1 is a chromium bronze alloy with a hardness of ≥110 HB and a small amount of magnesium and chromium.

Chinese name: QCr0.5-0.2-0.1
Standard: GB/T 2045-1980 (confirmed in 1996)
Chemical composition: magnesium, chromium, special heat resistance and corrosion resistance

●Characteristics and scope of application:

Compared with QCr0.5, it not only further improves heat resistance and corrosion resistance, but also improves notch sensitivity. Other properties are similar to QCr0.5. QCr0.5-0.2-0.1 is used to make electrodes on spot welding and seam welding machines.

●Chemical composition:

Copper Cu: margin
Aluminum Al: 0.1～0.25
Chromium Cr: 0.4～1.0
Magnesium Mg: 0.1～0.25
Note: ≤0.5 (impurities)

●Mechanical properties:

Hardness≥110 HB