1. Production process

Raw material processing and smelting

Use scrap copper, electrolytic copper and other raw materials, and smelt them through large-tonnage electric furnaces.

It is mentioned that Jintian Copper Industry adopts the "large-tonnage electric furnace smelting-submerged liquid transfer-multi-head multi-stream horizontal continuous casting" technology to achieve efficient smelting and reduce metal loss, and reduce pollution through bag dust removal. The smelting temperature is usually controlled at around 1100℃, and slag remover is added to remove impurities.

Continuous casting and molding

Horizontal continuous casting technology is a key step,

It is pointed out that a single furnace can continuously cast 64 bars of different specifications at the same time, and the production efficiency is more than 10 times higher than that of traditional processes. Some processes use the upward method (such as), and solve the problem of billet breaking by optimizing smelting and casting parameters (such as temperature and drawing speed).

Extrusion and processing

Hot extrusion is an important link,

It is mentioned that a 38MN reverse extruder is used, and its extrusion force covers a variety of grades of production, so that the product has high density and high strength. After extrusion, the copper rod needs to go through processes such as stretching, pickling, and lubrication to further optimize the surface quality.

Annealing treatment

Low-temperature annealing (200-350℃, 2-6 hours of heat preservation) is carried out in a reducing atmosphere, which can refine the grains and improve the cold heading performance. It is pointed out that the grain size is uniform (30-50μm) after annealing, the proportion of twins is low, and the mechanical properties are improved.

Short process optimization

As mentioned above, the production process is shortened by continuous extrusion technology, combined with natural gas and electric segmented heating, to reduce energy consumption and improve the level of automation.

2. Product advantages

Excellent mechanical properties

The tensile strength range is wide (275-560 MPa), and the yield strength is 95-440 MPa, depending on the processing state (such as soft annealing or hard state).

The cold heading performance is outstanding. The optimized C65100 has a tensile strength of 360-450 MPa and a cross-sectional shrinkage rate of 40-60%, which is suitable for high-precision processing such as fasteners.

Corrosion and high temperature resistance

Stable strength at 450℃, excellent high temperature softening performance, suitable for high temperature environments such as heat exchanger tubes.

Strong corrosion resistance, especially suitable for corrosive environments such as marine and chemical industries.

Excellent processing performance

Good hot and cold processing performance, can be stamped, turned, welded and other processing, without preheating or post-weld treatment.

High surface quality, uniform grain structure, reducing the risk of processing cracks.

Wide range of applications

Including aerospace (rivets, bolts), ships (propeller shafts), electricity (cable connectors), automobiles (hydraulic pipelines) and construction industries.

Environmental protection and cost-effectiveness

Short process technology reduces energy consumption and waste, as

mentioned, production costs are reduced and product density is improved.

Supports the recycling of scrap copper, in line with the concept of resource circulation.