Production process and product advantages of C95400 copper rod

1. Production process of C95400 copper rod

The production process of C95400 copper rod combines traditional copper alloy processing technology with special treatment for its composition characteristics, which can be divided into the following core steps:

Raw material selection and smelting

Electrolytic copper and scrap copper are used as the main raw materials, supplemented by aluminum ingots, iron powder, nickel and other alloy elements to ensure that the chemical composition meets the standards (Cu≥83.0%, Al 10.0-11.5%, Fe 3.0-5.0%, Ni≤1.5%). The smelting temperature is controlled at 1000-1100℃, and an electric furnace or an industrial frequency furnace is used. During the process, a slag remover needs to be added to remove oxides, and the alloy ratio is adjusted through component testing.

2. Casting and molding

The molten copper liquid is molded by a continuous casting machine or a traction machine to form a rough copper rod blank. The continuous casting process is rapidly solidified through a water cooling system to reduce grain coarsening and ensure uniformity of the structure. Some processes use extrusion to directly mold, which is suitable for complex cross-section requirements.

Hot and cold working

Rolling and drawing: Refine the grains and enhance the mechanical properties through multiple rolling (reducing the diameter) and drawing (improving the surface finish). For example, cold drawing can increase its tensile strength to more than 586MPa.

Heat treatment:

Solution treatment: temperature 870-910℃, eliminate casting stress, dissolve the second phase particles, and lay the foundation for subsequent aging strengthening.

Annealing treatment: temperature 620-660℃, adjust the lattice structure, improve ductility and fatigue resistance.

Finishing and testing

Includes surface treatment such as straightening (ensuring straightness), pickling (removing oxide layer), polishing, as well as ultrasonic flaw detection, hardness testing and mechanical property testing to ensure compliance with standards such as ASTM B505.

2. Product advantages of C95400 copper rod

C95400 aluminum bronze has the following significant advantages due to its unique alloy design:

Excellent mechanical properties

High strength: basic tensile strength ≥586MPa, yield strength ≥221MPa; after heat treatment, it is increased to ≥655MPa and ≥310MPa respectively, suitable for high-load parts.

Wear resistance: high hardness (Brinell hardness 160-200) and low friction coefficient, can withstand long-term wear, such as bearings, gears and other scenes.

Impact resistance: Charpy impact value reaches 15-22 joules, suitable for dynamic load environments, such as ship propellers.

Excellent corrosion resistance

Excellent performance in seawater and chloride ion environments, the corrosion rate is only 1/10 of ordinary carbon steel, suitable for marine engineering and chemical equipment.

The addition of nickel further inhibits the tendency of stress corrosion cracking.

Balance of thermal and electrical properties

Thermal conductivity: 59W/m·K thermal conductivity, suitable for heat dissipation components.

Conductivity: 13% IACS conductivity, although lower than pure copper, but meets the needs of most electrical connectors.

High temperature resistance: melting point 1040℃, can work stably for a long time below 230℃.

Processing flexibility

It can be formed by casting, forging, machining and other methods, and has a wide heat treatment window (such as annealing temperature range up to 40℃), which can meet different process requirements.

Although the weldability is worse than that of ordinary copper alloys, reliable connection can still be achieved through TIG or laser welding.