Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New high-speed welding technology

27.08.2003



Australian scientists have produced a new high-speed welding technology that slashes hours from traditional joining of corrosion-resistant metals.

The Keyhole Welding process has been developed jointly by the Cooperative Research Centre for Welded Structures and CSIRO Elaborately Transformed Metals at Woodville in Adelaide, South Australia.

CSIRO’s Dr Ted Summerville says, ’This is a breakthrough, high-quality solution to the limited penetration of conventional TIG welding’.



’The new process combines high welding currents and novel torch design to give a process that can punch through 12 mm plate with ease.’

Dr Summerville says, ’A keyhole is formed in the molten metal produced by the arc, and this keyhole then anchors to both the front and root faces of the plate, rendering it very stable’.

’This, and the fact that the arc gases can now pass cleanly through the material, make the process highly reproducible and very robust.

’A feature of Keyhole Welding is the square edge plate preparation, which minimises joint preparation and filler material consumption.’

Another key feature is its ability to complete joints in a single pass. ’This reduction in number of weld passes lowers the risks of weld contamination, and can significantly increase productivity, especially when the materials are thicker than about 5 mm’, says Dr Summerville.

’These are major bonuses when welding corrosion-resistant metals such as stainless steel and titanium.

’This new process can be used for welding all types of stainless steel, C-Mn steel and titanium alloys’, Dr Summerville says. ’Single pass welding speeds vary with the thickness being welded, for example 12 mm plate is typically welded at 300 mm per minute, 8 mm plate at 500 mm per minute and 3 mm plate at 1000 mm per minute.’

’Welding stainless steel and titanium, which previously took hours, can now be automated and completed in minutes.’

Keyhole Welding is easily implemented as the process uses a conventional GTAW power supply capable of delivering 500-1000 amps.

Licenses for Keyhole Welding technology are being offered in Australia, Europe and the USA for use in the manufacture of products ranging from spiral-welded pipe to railway rolling stock.

A number of licensees in these markets have reported significant productivity improvements.

Dr Summerville will be in Europe shortly to demonstrate the technology, particularly through welding industry associations.

For further Information Contact:

Ken Anderson, +61 3 9545 2052, 0414 457 214
Manager Marketing Communications CSIRO Manufacturing & Infrastructure Technology
Email: Ken.Anderson@csiro.au
Website: www.cmit.csiro.au

Dr Colin Chipperfield, +61- 2-4252-8889
Chief Executive Officer
Cooperative Research Centre for Welded Structures
Email: cchipper@uow.edu.au
Website: http://www.crcws.com.au

Rosie Schmedding | CSIRO
Further information:
http://www.csiro.au/index.asp?type=mediaRelease&id=Prkeyhole
http://www.cmit.csiro.au
http://www.crcws.com.au

More articles from Process Engineering:

nachricht New manufacturing process for SiC power devices opens market to more competition
14.09.2017 | North Carolina State University

nachricht Quick, Precise, but not Cold
17.05.2017 | Fraunhofer-Institut für Lasertechnik ILT

All articles from Process Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Neutron star merger directly observed for the first time

University of Maryland researchers contribute to historic detection of gravitational waves and light created by event

On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...

Im Focus: Breaking: the first light from two neutron stars merging

Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.

Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....

Im Focus: Smart sensors for efficient processes

Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).

When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...

Im Focus: Cold molecules on collision course

Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.

How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...

Im Focus: Shrinking the proton again!

Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.

It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ASEAN Member States discuss the future role of renewable energy

17.10.2017 | Event News

World Health Summit 2017: International experts set the course for the future of Global Health

10.10.2017 | Event News

Climate Engineering Conference 2017 Opens in Berlin

10.10.2017 | Event News

 
Latest News

Osaka university researchers make the slipperiest surfaces adhesive

18.10.2017 | Materials Sciences

Space radiation won't stop NASA's human exploration

18.10.2017 | Physics and Astronomy

Los Alamos researchers and supercomputers help interpret the latest LIGO findings

18.10.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>