Tin bronze and aluminum bronze have their own characteristics, in the choice of which is more suitable for gears need to consider a combination of factors, the specific differences are as follows:

Mechanical properties:

Strength:

Aluminum bronze: higher strength, especially containing iron, manganese and other elements of aluminum bronze belongs to high-strength alloys. After heat treatment and other processes to strengthen the strength advantage is more obvious, can withstand higher loads, applicable to the gear strength requirements of higher occasions.

Tin bronze: slightly lower strength relative to aluminum bronze, but still has a high level of strength in copper alloys, can meet the general mechanical transmission in the gear strength requirements.

Hardness:

Aluminum bronze: high hardness, good wear resistance, in the gear running process, can better resist the wear of the tooth surface, to maintain the accuracy and service life of the gear. Commonly used in the manufacture of gear blanks and other parts that require high strength, high hardness and high wear resistance.

Tin bronze: moderate hardness, its wear resistance is also better, but compared with aluminum bronze, in the long-term high load, high friction working conditions, the wear of the tooth surface may be relatively fast.

Corrosion resistance:

Aluminum bronze: excellent corrosion resistance, especially in seawater, atmosphere and some corrosive media. In gear application scenarios, if there is some corrosiveness in the working environment, such as in the chemical industry, the ocean and other fields, aluminum bronze gears have better adaptability and can maintain better performance and service life3.

Tin bronze: It has high chemical stability in the atmosphere, water vapor and seawater, and its corrosion resistance is better than that of ordinary copper alloys, but in some strongly corrosive environments, its corrosion resistance may not be as good as that of aluminum bronze2.

Processing performance:

Aluminum bronze: relatively difficult to process, high requirements for processing technology and equipment. Its hot and cold working performance is relatively poor, in the process of processing need to take special process measures, such as controlling the processing temperature, speed, etc., in order to ensure the processing quality3.

Tin bronze: has better casting performance and processing performance, easy to casting molding, and processing is relatively easy to cut, grind, etc., can reduce processing costs and production cycle .

In summary, if the gear working environment is harsh, high strength and corrosion resistance requirements, and is not particularly sensitive to cost, then aluminum bronze is more suitable for gears; if the machining performance requirements are higher, the working environment is relatively good and focus on cost control, then tin bronze may be a more suitable choice.