Examine performed through TWI employees for The Welding Institute’s business contributors. This identify comprises diffractive optical parts for manipulation of CO2 laser radiation - a feasibility examine; A evaluation of joint monitoring structures for laser welding; keep watch over of porosity in CO2 laser welds in C/Mn metal; the improvement of a solidification cracking try out for carbon-manganese metal laser welds.
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Example text
A typical unit consists of an outer housing with an internal spline form, Fig. 17. and inner hub with an external spline form, and two types of plate. Alternate plates locate o n the inner and outer spline forms and there is a viscous medium between them which transmits the drive. 17 Laser welded, pre-machined viscous drive components used in four wheel drive vehicles (courtesy of GKWni-Cardan). The internal splines made manufacture of the outer housing from a single part difficult, because through-broaching to give a quick and precise spline form is not possible.
Monel. Ninionic. PK33. v Low carbon and high strength low alloy (HSLA) forming grades Medium and high carbon Very good quality welds can be achieved provided sulphur and phosphorus levels are kept low. sce text. Weldable. but special precautions are necessary to ensure ecccptable weld properties. see text. 2 cont'd Alloy steels Satisfactory laser welds have been made in numerous pipeline. 3. High weld hardness can be a problem due to fast cooling rate. Stainless steels Austenitic Ferrit ic Martensitic Titanium and alloy6AI-4V-Ti Very good quality welds can be achieved in most grades except free machining.
E. strength, toughness, wear resistance, formability, machinability. etc. To meet the service and manufacturing requirements the chosen material will contain numerous alloying elements, some of which can affect weld quality. Because a material can be welded (by whatever process) it does not necessarily mean that the welds are always mechanically and metallurgically sound. Weld properties, weld metal structure, strength and toughness, etc. depend o n the parent metal composition and the resultant heat treatment which occurs due to the welding operation.