Address
304 North Cardinal St.
Dorchester Center, MA 02124
Work Hours
Monday to Friday: 7AM - 7PM
Weekend: 10AM - 5PM
Connecting Rod Process
Global Standards: Motorcycle Connecting Rod Material Codes and Their Performance Applications
1
2
3
4
5
6
7
8
1
| （JIS） | （AISI/SAE） | （DIN） | Material |
| SCM420 | 4118/ 4130/ 4135 | 1.7218 | 20CrMo |
| SCM440 | 4140/ 4142/ 4145 | 1.7225 | 42CrMo |
| — | 8620/ 8622/ 8625 | 1.6523/ 1.6526 | 20CrNiMo |
| — | — | — | 20CrNi2Mo |
| SNCM439 | 4340/ 9840/ 9842 | 1.6565 | 40CrNiMoA |
2
| Properties |
| High strength, good toughness, good weldability |
| High strength, high toughness, good fatigue resistance |
| High strength, good toughness, good wear resistance |
| High strength, high toughness, good fatigue resistance |
| High strength, high toughness, good fatigue resistance, good wear resistance |
3
| Connecting Rod Application |
| Low to medium speed diesel engines, light vehicles |
| High speed diesel engines, medium-sized vehicles, large machine tools |
| Medium speed diesel engines, small vehicles |
| Heavy-duty vehicles, engineering machinery, ship transmission systems |
| Heavy-duty vehicles, engineering machinery, metallurgical machinery |
4
| Crankshaft Application |
| Medium speed diesel engines, ship diesel engines |
| Heavy-duty diesel engines, ship main engines |
| Medium speed diesel engines, small ships |
| Medium speed diesel engines, large ships |
| Large diesel engines, large ships |
5
The process and function of integral carburizing and copper plating on the connecting rod to prevent carburization
1、Improving the hardness and wear resistance of the rod: Carburizing the entire rod can introduce carbon atoms into the surface of the rod to form a carbide layer, thereby improving the hardness and wear resistance of the rod. At the same time, copper plating the rod to prevent carburization can prevent the rod from being over-carburized, thereby ensuring that the surface hardness and wear resistance of the rod are within the appropriate range.
2、Improving the fatigue resistance of the rod: Carburizing the entire rod can improve the internal structure of the rod, increase its strength and toughness, and thereby improve the fatigue resistance of the rod.
3、Improving the corrosion resistance of the rod: The copper layer on the surface of the rod can effectively prevent the rod from being oxidized and corroded, thereby improving the corrosion resistance of the rod.
4、Improving the aesthetics of the rod: After carburizing and copper-plating the rod, the surface of the rod presents a metallic luster, improving the aesthetics and decorative properties of the rod.
In summary, the process of carburizing the entire connecting rod and then copper-plating the rod to prevent carburization can simultaneously improve the hardness, wear resistance, fatigue resistance, corrosion resistance, and aesthetics of the rod. This process can be applied to the manufacture of various mechanical equipment and tools to improve the quality and performance of the products.
6
Connecting rods are critical components in mechanical equipment such as internal combustion engines, and their manufacturing process requires multiple processing and treatment methods. Among them, the “overall carburized rod annealing” process is an important part of the manufacturing process, and its functions are as follows:
1、Improving material properties: The overall carburized rod annealing process can refine the grains in the connecting rod material, reduce the distance between grains, thereby improving the strength and toughness of the material, making it have better fatigue resistance and durability.
2、Reducing stress: The connecting rod will be subjected to large loads during use, causing internal stress. The overall carburized rod annealing process can improve the internal structure of the material, release and reduce the internal stress, thereby reducing deformation and cracks caused by stress and improving the service life of the connecting rod.
3、Improving processing performance: The connecting rod needs to undergo multiple processing and forming during the manufacturing process. The overall carburized rod annealing process can improve the processing performance of the material, making it easier to process into complex shapes and sizes.
In summary, the “overall carburized rod annealing” process is a necessary process in the manufacturing of high-performance connecting rods. It can improve material properties, reduce stress, and improve processing performance, thereby improving the service life and reliability of connecting rods.
7
Material selection: Common materials include titanium alloy, high-strength aluminum alloy, high-strength steel, etc. Different materials have different physical and chemical properties, and the most suitable material can be chosen based on design requirements.
1、Structural design: The structural design of the connecting rod includes the length of the rod body, diameter, shape of the ends, etc. Personalized design can be carried out according to different usage requirements.
2、Manufacturing processes: Manufacturing processes include casting, forging, processing, etc., and different processes can affect the performance of the connecting rod. Personalized design can be carried out by selecting suitable manufacturing processes that meet the design requirements.
3、Surface treatment: Surface treatment can improve the appearance, corrosion resistance, wear resistance, etc. of the connecting rod. Personalized design of surface treatment can be carried out according to usage requirements.
4、Lubrication method: The lubrication method of motorcycle connecting rods includes wet lubrication and dry lubrication. Different lubrication methods can affect the service life and performance of the connecting rod, and personalized design can be carried out by selecting the most suitable lubrication method based on design requirements.
In summary, personalized design options for high-performance motorcycle connecting rods can be based on material selection, structural design, manufacturing processes, surface treatment, and lubrication method, among other aspects. Personalized design can help connecting rods better adapt to specific usage requirements, improve motorcycle performance and reliability.
8
Description of surface treatment for connecting rod body.
| Surface Treatment | Characteristics | Applications | Color |
| Hard Anodizing | Improves surface hardness, wear resistance, and corrosion resistance | Aluminum alloys, steel materials, etc. | Black, silver, gold, blue, red, etc. |
| Surface Coating | Improves surface hardness and wear resistance | Steel materials, ceramic materials, metal materials, etc. | Depends on the coating material |
| Surface Polishing | Improves surface smoothness and aesthetics | Metal materials | Silver-white, gold, etc. |
| Ion Nitriding | Improves surface hardness and wear resistance | Steel materials | Dark grey |
| Nitriding Treatment | Improves surface hardness and corrosion resistance | Steel materials | Dark grey |
| Chromium Plating | Improves surface hardness, corrosion resistance, and aesthetics | Metal materials | Silver |