Abstract: The invention relates to a method for quick, flexible and quality laser welding of plastic articles. In the method, a laser beam is directed via scanner mirrors at an object being welded. According to the invention, in the method, the movement of the scanner mirrors is controlled and adjusted; and the moving speed of the laser beam is increased by increasing the focal distance to be more than 200 mm; and the moving speed of the laser beam is arranged to be more than 10 m/s; and the laser beam is moved several times along a predetermined welding track.

Abstract: A method for the manufacture of a metal matrix composite by the SHS technique comprises a reaction between titanium and carbon or between titanium and borium, forming titanium carbide or titanium diboride. Tantalum and molybdenum or chromium are blended to the raw materials of the metal matrix composite to improve the resistance of the metal matrix composite to high temperatures and/or corrosion. The invention also relates to a metal matrix composite which contains elements at whose presence a protective oxide layer is formed on the surface of the metal matrix composite during the use.

Abstract: A method for the manufacture of a metal matrix composite by the SHS technique comprises a reaction between titanium and carbon or between titanium and borium, forming titanium carbide or titanium diboride. Tantalum and molybdenum or chromium are blended to the raw materials of the metal matrix composite to improve the resistance of the metal matrix composite to high temperatures and/or corrosion. The invention also relates to a metal matrix composite which contains elements at whose presence a protective oxide layer is formed on the surface of the metal matrix composite during the use.