The difference between phosphor bronze bronze

Phosphor copper (phosphor bronze) (tin bronze) (tin phosphor bronze) by adding bronze degassing phosphorus content of 0.03-0.35%, tin content of 5-8%

other trace elements such as iron, iron, zinc, zinc, etc. have good ductility, fatigue resistance aromaticity. They can be used in electrical mechanical materials with high reliability

It is suitable for general copper alloy products.

Bronze originally refers to copper tin alloy, later all copper alloys except brass white copper are called bronze, often preceded by the name of main added elements. Tin bronze has good castability, antifriction mechanical properties, is suitable for manufacturing bearings worm gears

, gear, etc. Lead bronze is widely used in modern engines grinding machines. Aluminum bronze has high strength, good wear resistance corrosion resistance. It is used for casting high load gears, shaft sleeves, marine screws, etc. Bronze phosphor bronze have high elasticity good conductivity. They are suitable for making precision springs electrical contact elements. Bronze is also used to make non sparking tools used in coal mines oil depots.

Bronze is divided into bronze aluminum bronze. Bronze can be divided into two categories.

(1) Tin bronze: 20% - 30% tin. If the tin content is 20-30%, the money will be silver white, commonly known as "white copper" money. contain

The amount of tin is small, the money is light brown, commonly known as turquoise. Ancient tin bronze contains lead, generally 3-8%, which is quite modern tin bronze

The chemical composition of copper.

(2) Lead bronze: Tin 2-10%, lead 9-60%. If the amount of tin lead is large, the money will be gray, if it contains tin lead

If the amount is small, the money will be yellow blue. In the pre Qin period, the content of bronze coins was relatively high, generally ranging 7% to 56%, with some as high as 62%.

By the Han Dynasty, the lead content was about 9%. If the content of lead is about 33%, it is equivalent to the chemical composition of modern lead bronze.

3. Brass: brass was used to make money in the Ming Qing Dynasties. During the Jiajing period of Ming Dynasty, a large amount of money was cast with brass. It was called "zinc" in ancient times

For "Japanese lead". It is made of calamine (i.e. smithsonite ZnCO3). In the Yuan Dynasty, there was a saying that "red copper goes into calamine" is refined into brass,

Its color is like gold. In the late Ming Dynasty, China's zinc had been exported to foreign countries, the zinc content of zinc ingot was more than 98%. Brass

It can be divided into three parts

(1) Brass: 3-40% zinc. If the zinc content is 10-20%, it is called red copper (Xinjiang area), it is called Dan copper in Russia.

(2) Lead brass: zinc 35-43%, lead 0.3-3%. Some copper coins in Ming Qing Dynasties contained more lead. contain

The amount of zinc is sometimes less than 20-40%.

(3) Tin brass: 9-40% zinc, 0.2-2% tin. Sometimes it also contains a small amount of lead

Phosphor bronze is a copper alloy containing 2% ～ 8% tin, 0.1% ～ 0.4% phosphorus the rest copper. Mainly used as wear-resistant parts elastic components.