Joining with Electrochemical Support: Cold Pressure Welding of Copper – Weld Formation and Characterization

Cold pressure welding is a versatile process that can be used to weld most metals. It is, however, difficult to achieve a weld at room temperature through the application of pressure. As in every welding process, several different parameters have to be considered: the metals to be welded and their properties in terms of surface condition, cleanliness, strength of the metal, and so on. The surface condition and surface preparation methods are the most important parameters, since the cold weld is based solely on the contact between the two metal surfaces that are involved. Joining with electrochemical support (ECUF) is a new approach that overcomes most of the current process barriers and limitations through optimized electrochemical surface treatment and an improved process technology based on a pilger roll. This paper provides an overview of the ECUF process and current research results on the pressure welding of pure copper (CW004A). The formation of the weld has been investigated and the welding interface characterized in respect of its microstructure.

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Study on the Welding Process and Application of Al/Cu Materials

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.800.290 ◽

2013 ◽

Vol 800 ◽

pp. 290-293

Author(s):

Hong Yang ◽

Nian Suo Xie ◽

Qiang Liu

Keyword(s):

Friction Welding ◽

Explosive Welding ◽

Welding Process ◽

Dissimilar Material ◽

Pressure Welding ◽

Welding Technology ◽

Cold Pressure

The characteristics of welding process for aluminum-copper dissimilar material such as friction welding, explosive welding, brazing and cold pressure welding are discussed firstly in this paper. Then the welding technology and its application for aluminum-copper dissimilar material are summarized. Finally, the outlook is analyzed for the welding process of aluminum-copper dissimilar material.

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Properties of Cold Pressure Welded Aluminium and Copper Sheets

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.463-464.244 ◽

2012 ◽

Vol 463-464 ◽

pp. 244-248 ◽

Cited By ~ 1

Author(s):

Mumin Sahin ◽

Cenk Misirli

Keyword(s):

Intermetallic Layer ◽

Cold Deformation ◽

Welding Process ◽

Industrial Process ◽

Hydraulic Press ◽

Pressure Welding ◽

Aluminum Sheets ◽

Cold Pressure ◽

Local Hardening ◽

Welding Technique

Cold pressure welding has been used as an industrial process with an increasing rate for several years. In this study, cold pressure welding has been applied to aluminum and copper alloy sheets having commercial purity. Hydraulic press having 150 metric-ton capacities has been used for welding process. As the surface roughness and the weld deformation ratios of aluminum sheets increased, tensile strength of the joints also increased. Purchased specimens with original roughness had the lowest weld deformation as-is and it was not possible to join these sheets at 30% weld deformations. Hardness increases due to local hardening at the interface as a result of cold deformation. Results showed that the cold pressure welding technique in lap form resulted in strong Al-Al joints and the intermetallic layer formed in Al-Cu joints did not affect the joint strength to a great extent.

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Cold pressure welding of aluminium-steel blanks: Manufacturing process and electrochemical surface preparation

10.1063/1.5034880 ◽

2018 ◽

Cited By ~ 1

Author(s):

Hans Christian Schmidt ◽

Werner Homberg ◽

Alejandro Gonzalez Orive ◽

Guido Grundmeier ◽

Illia Hordych ◽

...

Keyword(s):

Manufacturing Process ◽

Surface Preparation ◽

Pressure Welding ◽

Cold Pressure

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Investigation of Cold Pressure Welding: Cohesion Coefficient of Copper

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.651-653.1421 ◽

2015 ◽

Vol 651-653 ◽

pp. 1421-1426 ◽

Cited By ~ 7

Author(s):

Hans Christian Schmidt ◽

Christoph Ebbert ◽

Dmytro Rodman ◽

Werner Homberg ◽

Guido Grundmeier ◽

...

Keyword(s):

High Vacuum ◽

Metallic Surfaces ◽

Pressure Welding ◽

Cold Roll ◽

First Results ◽

Interesting Approach ◽

Set Up ◽

Electrochemical Surface Treatment ◽

Welding Processes ◽

Cold Pressure

Joining materials by forming is an interesting approach to the manufacture of hybrid (multi material) parts. By establishing a cold pressure weld between metallic surfaces, high quality joints with superior properties can be achieved. Reliable cold welding conditions are difficult to set up, however, since the weld initiation requires extraordinary clean, virtually sheer surfaces. Until today such conditions could only be achieved under a high vacuum conditions. Various studies on cold pressure welding reported that under vacuum welds can be established at significantly lower deformation than in a normal atmosphere. Since adverse deformation is currently needed in industrial cold pressure welding processes like the cold roll cladding of metal bands, a new process with in-line electrochemical surface treatment, is investigated. The ECUF process is intended to supply clean and thereby highly activated surfaces to the cold pressure welding process.This paper presents first results on the weld-ability of copper specimens with regard to the influence of the welding environment: air, argon and KCl solution. Butt welds were made by pressure welding of previously fractured specimens.

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