Projects / Programmes
An analysis of laser welding processes and weld properties.
| Code |
Science |
Field |
Subfield |
| 2.10.06 |
Engineering sciences and technologies |
Manufacturing technologies and systems |
Welding |
| Code |
Science |
Field |
| T130 |
Technological sciences |
Production technology |
laser welding, repair welding of tools, die casting, testing of welds
Researchers (8)
| no. |
Code |
Name and surname |
Research area |
Role |
Period |
No. of publicationsNo. of publications |
| 1. |
02775 |
PhD Rajko Kejžar |
Manufacturing technologies and systems |
Researcher |
2007 - 2008 |
230 |
| 2. |
20441 |
PhD Damjan Klobčar |
Mechanical design |
Researcher |
2007 - 2009 |
565 |
| 3. |
28609 |
PhD Matej Pleterski |
Materials science and technology |
Junior researcher |
2007 - 2009 |
70 |
| 4. |
02861 |
PhD Ivan Polajnar |
Mechanical design |
Researcher |
2009 |
418 |
| 5. |
10047 |
Franc Ravnik |
Manufacturing technologies and systems |
Researcher |
2009 |
31 |
| 6. |
26144 |
PhD Lidija Rihar |
Manufacturing technologies and systems |
Technical associate |
2009 |
171 |
| 7. |
18873 |
Matevž Steržaj |
|
Technical associate |
2007 - 2009 |
0 |
| 8. |
02045 |
PhD Janez Tušek |
Mechanical design |
Head |
2007 - 2009 |
1,116 |
Organisations (1)
Abstract
The project will be dealing with various processes taking place during laser welding using a filler material. The processes during laser welding not yet researched are reckoned to be element burn-off, diffusion processes occurring between a parent metal and a filler material, material transfer from a thin welding wire to weld metal, an optimum ratio between a wire diameter and a laser beam in focus, optimum energy distribution in the laser-beam focus, an optimum laser-pulse shape, temperature distribution in the weld metal and its surroundings during welding, a position of a laser-beam focus at a workpiece, mechanical and other properties of the weld metal and a surfacing weld, a relation between laser-beam energy input, weldability, and some other themes.
Our research will be focused primarily on laser repair welding of tools and other machine elements, which is needed strongly by the Slovenian industry. The second part of the research will deal with the development and production of thin wires for laser technologies. A basis of quality laser welding is the thin wires showing adequate chemical composition, diameter and shape. The European market is short of such wires, the latter are very expensive and the choice of chemical compositions, diameters and shapes is scarce. Both sub-projects (laser welding itself and welding wires) are essentially related and cannot be separated. They are going to be investigated jointly since this is both a technological requirement and a market requirement. They are mentioned separately, however, because one will have to market them separately. The wires concerned are going to be sent to the Slovenian, European and American markets.
The present project is being proposed because of the needs of the Slovenian industry and of the markets in Slovenia and worldwide. Introductory investigations have shown that we are capable of carrying out the project proposed and have at our disposal sufficient theoretical and practical knowledge and sufficient basic equipment. Special equipment will be sought in other institutions.
Significance for science
The results obtained in research of laser processing provided a new knowledge in the field of
materials and new technologies. Applicative research improved the existing laser technologies
and developed new ones for industrial applications. The new technologies are developed to
make the work with applications easier. By means of synergy between pedagogical and
research work, personnel capable of transferring research results to various industrial branches
are educated and qualified.
On the research field laser welding, laser repair welding and cladding of hard materials, the new
technology was developed. It enables manufacturing of improved products with the higher
added value as well as repair of expensive worn out tools. We developed the laser pulse shape,
which enable successful welding of hard materials without cracking. A fine local repair of
different tools and products is enabled, which increases the added value to the products and
the competition ability of the industry which applied this technology.
The research of suitability of filler materials for different applications and developed
recommendations for welding of different materials presents new knowledge. This enables the
industry production of products with higher added value. The acquired knowledge is extremely
important in selection of material for production of thin filler wires suitable for laser welding.
Due to pretentiousness of production of these wires, is the acquired technology extremely important for the development of science. Transfer of this technology to the industry enables
production with higher added value and gaining bigger market share.
Significance for the country
Newly developed laser repair welding technologies of different tools and hard materials enables
a production of new products with higher added value. The application of these technologies
enable repair of costly and pretentiousness tools, which for production consume a lot of
materials and energy and the production is not environmentally friendly. Quality repaired tools
prolong the in-service tool life and reduce of production costs in the final price of the product.
This enables numerous casting facilities, tool makers and other industry for production of
machine components increase of tool life and improved competition on European and World
market.
Development and research on the field of materials for repair welding of tools and thermal
fatigue resistance enables the selection of optimal material for particular application, based on
the developed recommendations. This enables prediction of the in-service tool life and quality
assurance. Based on these results and tests the selection of materials is done for production of
thin filler wires suitable for laser repair welding and surfacing. Acquired technology of thin wire
production for laser welding enables production filler wires with higher added value. The
transfer of this technology into the industry enables it to conquer new markets, increasing the
market share, increasing the competition and easier survivor of financial crisis.
The research and development on the field of laser polishing will enable the complete repair of
tools on one place, and with the use of mobile laser systems on the machine. This will
accelerate tool repairs, since the repairs will be done on the machine. This will shorten
additional times for dismounting and increased times of tool usage. This will increase added
value and competition ability of Slovenian industry on domestic and world markets.
Most important scientific results
Annual report
2008,
final report,
complete report on dLib.si
Most important socioeconomically and culturally relevant results
Annual report
2008,
final report,
complete report on dLib.si
