ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The paper treats the application of laser to repair of cracks occurring at dies for diecasting of non-ferrous metals (particularly aluminium, magnesium and their alloys). The first partdescribes a suitable laser unit enabling crack grooving and then welding. An Nd:YAG laser sourceis shown with its equipment for laser-beam transfer, control and directing of laser-beam focus. Diesfor die casting are made of quality steels and are of very complex shape. As far as their repair isconcerned this means that they are to be welded at their edges, corners, narrow gaps and verticalwalls, i.e. in various positions and in various directions. In the second part the grooving technologyis described, and in the third part laser welding of grooved cracks using a filler material, i.e., a thinwelding wire. At the end some conclusions are drawn. It is stated that from the viewpoints oftechnology and economics, it is sensible to laser groove and then weld the thermal cracks with asuitable material. The filler material should have such a chemical composition that after welding aweld having adequate mechanical properties, without any additional heat treatment, is obtained
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.4059.pdf
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