Supercharge Your Innovation With Domain-Expert AI Agents!

Preparation method of Kovar alloy wrapped Cu core composite bar

A technology of composite rods and alloys, which is applied in the field of preparation of Kovar alloy-wrapped Cu core composite rods, can solve the problems of strict pretreatment requirements, lack of solutions, complex processes, etc., and achieve good matching sealing, good conductivity, The effect of simple process

Pending Publication Date: 2021-12-28
WUHAN UNIV OF TECH
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The entire preparation process has problems such as complex process, long process, high cost, and strict pretreatment requirements, and there is still a lack of effective solutions

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of Kovar alloy wrapped Cu core composite bar
  • Preparation method of Kovar alloy wrapped Cu core composite bar
  • Preparation method of Kovar alloy wrapped Cu core composite bar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Preparation of ingots: purchased Ф42mm×45mm 4J29 alloy rods, the size of which is Ф30mm×42mm-Фinside 15mm×40mm 4J29 alloy cylinders after the blind hole is drilled on the wagon, and the bottom is chamfered (such as figure 1 as shown); Purchased Ф16mm×40mm Cu bar, the size after wagon is Ф15.2mm×40mm, bottom chamfer (such as figure 2 shown); the inner and outer surfaces of the 4J29 alloy cylinder and the surface of the Cu rod were polished and dried with acetone, and the Cu core was embedded in the 4J29 alloy cylinder with a press to prepare an interference fit 4J29 alloy / Cu composite ingot ( Such as image 3 shown).

[0038] (2) Pre-heat treatment: 4J29 alloy / Cu composite ingot is placed in a vacuum furnace and heated with the furnace, the heating rate is 5°C / min, the heat treatment temperature is 990°C, the holding time is 3 hours, and then slowly cooled to room temperature with the furnace and released from the furnace .

[0039] (3) Hot extrusion: heat the co...

Embodiment 2

[0044] Taking the 4J29 / CuФ10mm product as an example, the process flow and process parameters adopted in the present invention are as follows:

[0045] (1) Preparation of ingot: Outsourced Ф42mm×45mm 4J29 alloy bar, the size after the wagon is perforated is Ф40mm×42mm-Фinside 20mm×40mm 4J29 alloy cylinder, chamfered at the bottom, outsourced Ф21mm×40mm Cu rod material, the size of the wagon is Ф20.2mm×40mm, and the bottom is chamfered; the inner and outer surfaces of the 4J29 alloy cylinder and the surface of the Cu rod are surface-polished and cleaned and dried with acetone, and the Cu core is embedded in the 4J29 alloy cylinder with a press to prepare 4J29 alloy / Cu composite ingot with interference fit relationship (such as image 3 shown).

[0046] (2) Pre-heat treatment: 4J29 alloy / Cu composite ingot is placed in a vacuum furnace and heated with the furnace, the heating rate is 5°C / min, the heat treatment temperature is 990°C, the holding time is 3 hours, and then slowly ...

Embodiment 3

[0051] Taking the 4J29 / CuФ10mm product as an example, the process flow and process parameters adopted in the present invention are as follows:

[0052] (1) Preparation of ingot: outsourced Ф52mm×45mm 4J29 alloy bar, the size after the wagon is punched is Ф50mm×42mm-Ф inside 20mm×40mm 4J29 alloy cylinder, chamfered at the bottom, outsourced Ф21mm×40mm Cu rod material, the size of the wagon is Ф20.2mm×40mm, and the bottom is chamfered; the inner and outer surfaces of the 4J29 alloy cylinder and the surface of the Cu rod are surface-polished and cleaned and dried with acetone, and the Cu core is embedded in the 4J29 alloy cylinder with a press to prepare 4J29 alloy / Cu composite ingot with interference fit (such as image 3 shown).

[0053] (2) Pre-heat treatment: 4J29 alloy / Cu composite ingot is placed in a vacuum furnace and heated with the furnace, the heating rate is 5°C / min, the heat treatment temperature is 960°C, the holding time is 4 hours, and then slowly cooled with the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a Kovar alloy wrapped Cu core composite bar. The preparation method comprises the following process steps: S1, preparing an ingot blank, specifically, punching a blind hole in Kovar alloy to obtain a cylinder, processing Cu into a Cu bar with the outer diameter slightly larger than the inner diameter of the Kovar alloy cylinder, and embedding the Cu bar into the Kovar alloy cylinder to obtain the composite ingot blank with the embedded Cu bar; S2, carrying out pre-heat treatment; S3, carrying out hot extrusion, specifically, heating the composite ingot blank obtained in the step S2 to 950-980 DEG C in a furnace, carrying out heat preservation for 1.5-2 hours, discharging and extruding the sealing end of the composite ingot blank out of the furnace in front to obtain a composite bar blank, and keeping the temperature of the composite ingot blank at 950-980 DEG C during extrusion so as to obtain the Kovar alloy wrapped Cu core composite bar; and S4, carrying out final heat treatment. The preparation method has the advantages of being simple in procedure, short in process, high in efficiency and the like.

Description

technical field [0001] The invention relates to a method for preparing a Kovar alloy-wrapped Cu core composite rod with simple procedure, short process and high efficiency, and belongs to the field of functional composite material preparation. Background technique [0002] Kovar alloy is a metal material with special thermal expansion, that is, it has a linear expansion coefficient similar to that of hard glass in the range of 20-450 ° C, and can be widely used in high vacuum glass-metal hermetic joints in the field of electronics industry. In recent years, with the rapid development of the electronics industry, new performance requirements such as high strength, high hardness, high elasticity, high electrical conductivity, high thermal conductivity and non-magnetic properties have been put forward for sealing alloys used in some electrical device products, but Kovar Alloys have poor electrical and thermal conductivity. For this reason, corresponding high-conductivity and h...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/04
CPCB21C37/04Y02E10/40
Inventor 柴方王玮
Owner WUHAN UNIV OF TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com