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Laser nitriding an element made of titanium alloy by blowing nitrogen and inert gas
Laser nitriding an element made of titanium alloy by blowing nitrogen and inert gas
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机译:通过吹氮气和惰性气体对氮化钛合金元素进行激光氮化
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摘要
A method of nitriding a piece made of titanium alloy, in which a laser beam is directed onto the piece to obtain a small amount of surface melting in the impact zone of the laser, nitrogen under high pressure is blown immediately behind the impact zone of the laser beam so that the nitrogen penetrates into the impact zone once it has become semi- solid, and an inert gas is blown around the nitrogen so as to cover and overlap the laser impact zone. The apparatus of the invention includes a central tube for conveying the nitrogen and a circularly symmetrical duct around the axis of the central tube having inside and outside walls that are conical and that serve to convey the inert gas. The invention serves to obtain a hard surface layer having a thickness of 1 mm to 2 mm.
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