Copper Alloy Pipe Strength and Conductivity via Hot Extrusion
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Solution Overview
Problem
Current copper alloys for high-strength and high-conductivity applications, such as in wire harnesses and electrical components, face challenges with high production costs, energy consumption, and limitations in strength and conductivity due to the need for high-temperature heat treatment processes that lead to oxidation and sticking issues.
Innovation Solution
A copper alloy composition with specific ranges of Co, P, Sn, and optional elements like Ni, Fe, Zn, Mg, Ag, Al, Si, Cr, and Zr, which are uniformly precipitated and solid-solved to enhance strength and conductivity, produced through a hot extruding process that reduces costs and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If high-temperature heat treatment process is used to achieve high strength and conductivity, then strength and conductivity are improved, but production cost and energy consumption increase
Solution Approach 1:
The patent changes the temperature parameter of the heat treatment process from conventional high temperatures (900-950°C) to a lower temperature range (700-850°C), while achieving the same or better strength and conductivity results through optimized alloy composition and controlled precipitation hardening
Solution Approach 2:
The patent uses a composite alloy system combining Cu-Co-P-Sn with optional elements (Ni, Fe, Zn, Mg, Ag, Al, Si, Cr, Zr) to achieve synergistic effects where the combination of elements enables lower processing temperatures while maintaining high strength and conductivity properties
2Strength
If high-temperature heat treatment process is used to achieve high strength and conductivity, then strength and conductivity are improved, but production cost increases
Solution Approach 1:
The patent reduces the heat treatment temperature from 900-950°C to 700-850°C, which lowers energy costs and reduces equipment requirements, while achieving the desired mechanical and electrical properties through optimized composition and controlled precipitation
Solution Approach 2:
The patent performs preliminary alloying during the hot extrusion process itself, where the specified composition ranges of Co, P, Sn and optional elements are incorporated into the matrix before final heat treatment, eliminating the need for separate alloying steps and reducing overall production complexity
3Strength
If high-temperature heat treatment process is used, then strength is improved, but oxidation and sticking issues occur
Solution Approach 1:
The patent lowers the heat treatment temperature to 700-850°C, which is below the typical oxidation and sticking thresholds for copper alloys, thereby eliminating these harmful effects while still achieving the required strength through precipitation hardening mechanisms
Solution Approach 2:
The patent converts the potential harm of high-temperature processing by using the specified alloy composition (particularly Co and P content ratios) to enable precipitation hardening at lower temperatures, where the same strengthening effect is achieved without the oxidative and sticking problems inherent in conventional high-temperature processing
4Weight of moving object
If copper amount is reduced to lower weight and cost, then weight and cost are reduced, but strength and conductivity may deteriorate
Solution Approach 1:
The patent uses a multi-element composite alloy system where Cu is combined with Co, P, Sn and optional elements in specific ratios, creating synergistic strengthening and conductivity enhancement that allows reduced copper content while maintaining or improving overall performance
Solution Approach 2:
The patent optimizes the compositional parameters of the alloy, specifically the content ranges of Co (0.13-0.33 mass%), P (0.044-0.097 mass%), Sn (0.005-0.80 mass%), and optional elements, to achieve maximum strength and conductivity per unit weight, enabling thinner and lighter product designs
5Weight of moving object
If copper amount is reduced to lower weight and cost, then weight and cost are reduced, but conductivity may deteriorate
Solution Approach 1:
The patent creates a composite alloy system where the interaction between Cu, Co, P, Sn and optional elements produces synergistic effects that enhance electrical conductivity beyond what pure copper or simple alloys can achieve, allowing reduced copper content while maintaining high conductivity
Solution Approach 2:
The patent optimizes compositional parameters, particularly the ratio of Co to P and the controlled addition of Sn and optional elements, to maximize electrical conductivity through controlled precipitation hardening that preserves the copper matrix continuity and electron transport pathways
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The alloy achieves high strength and conductivity while minimizing production costs and energy use, with improved heat resistance and ductility, allowing for reduced diameter or thickness of copper products, thus optimizing weight and cost reduction.
Implementation Method 1
a high strength and high conductivity copper alloy pipe, rod, or wire produced by processes including a hot extruding process, wherein Co and P are uniformly precipitated
Implementation Method 2
Sn is solid-solved
Implementation Method 3
produced by processes including a hot extruding process
Data Source
Figure 1
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AI summary
A high strength and high conductivity copper alloy pipe, rod, or wire is composed of an alloy composition containing 0.13 to 0.33 mass% of Co, 0.044 to 0.097 mass% of P, 0.005 to 0.80 mass% of Sn, and 0.00005 to 0.0050 mass% of O, wherein a content [Co] mass% of Co and a content [P] mass% of P satisfy a relationship of 2.9 ≤ ([Co]-0.007)/([P]-0.008) ≤ 6.1, and the remainder includes Cu and inevitable impurities. The high strength and high conductivity copper alloy pipe, rod, or wire is produced by a process including a hot extruding process. Strength and conductivity of the high strength and high conductivity copper pipe, rod, or wire are improved by uniform precipitation of a compound of Co and P and by solid solution of Sn. The high strength and high conductivity copper pipe, rod, or wire is produced by the hot extruding, thereby achieving reduction in the cost.