Copper Powder Metallurgy
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Copper Powder Metallurgy

Copper powder metallurgy is a net-shaping technology that uses high-purity copper powder, bronze powder, and other materials to produce metal parts through precision pressing and controlled sintering. It retains the excellent electrical and thermal conductivity of copper.

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Product Introduction

Copper Powder Metallurgy

Overview and Advantages

Advantages:

Material Characteristics: Electrical conductivity of 85–95% IACS; self-lubricating and wear-resistant tin bronze/graphite bronze; resistant to non-oxidizing acids and other forms of corrosion; controllable porosity and wettability.

Manufacturing Advantages: Material utilization rate >95%; near-net shaping of complex structures; suitable for mass production; conventional accuracy IT7–IT9.

Post-processing Options: Pure copper, tin bronze (Cu-Sn6/8/10), brass, etc.; finishing, oil/resin impregnation, heat treatment, electroplating (nickel/silver/gold), etc.

Application Fields

Electrical and Electronic Engineering: Electrical contacts, busbars, etc.

Automotive and Transportation: Synchronizer hubs, steering bearings, etc.

Industrial Machinery: Oil-impregnated bearings, gears, etc.

Home Appliances and Hardware: Water pump gears, valve cores, etc.

Thermal Management: Heat pipe wicks, heat sink substrates, etc.

Process and Quality Guarantee

Process Flow: Powder preparation → die pressing (400–700 MPa) → sintering (780–950 °C in nitrogen, vacuum, or other protective atmospheres) → post-processing.

Company and Quality Assurance: ISO 9001:2016 certified; 6S management implemented; equipped with German-imported equipment; annual output over 5 million pieces; exported to more than 20 countries; provides material certificates; compliant with RoHS and REACH; 24-hour response to quality issues; equipped with image measuring instruments and other testing equipment.

Frequently Asked Questions

Q1: Electrical conductivity and comparison with pure copper rods?

A: 85–95% IACS. Optimized processes can reach nearly 98% IACS, slightly lower than oxygen-free copper rods. The advantage lies in the low-cost manufacturing of complex conductive components.

Q2: Principle and lifespan of oil-impregnated bearings?

A: Porous structure stores oil; a self-lubricating film forms during operation, resulting in long service life and maintenance-free performance under medium load and speed.

Q3: Accuracy and minimum wall thickness?

A: Finishing tolerance within ±0.02 mm; minimum wall thickness ranges from 0.5–0.8 mm. Gears meet DIN 7–8 grade.

Q4: Airtightness and sealing applications?

A: Standard parts are not suitable. Resin impregnation can meet low-pressure sealing requirements, and high-temperature densification achieves a density over 97%.

Q5: Development cycle and cost of new parts?

A: 8–12 weeks (including 4–6 weeks for molds). Unit cost is low for large quantities, and mold costs can be flexibly allocated for small batches.

Q6: Scenarios where copper PM is not recommended?

A: Less than 1,000 pieces, extremely simple structures, parts requiring 100% theoretical density, strength >500 MPa, or oversized parts.

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