Method for intensifying explosion-proof pipes by induction fusion welding and surfacing subareas on fire-facing side of boiler pipeline
A technology for explosion-proof pipes and pipes, which is applied in the field of induction fusion welding and surfacing welding to strengthen explosion-proof pipes. It can solve the problems of uniform sandblasting in the surfacing welding area of pipe rows and affect the quality of surfacing welding of pipe rows, so as to achieve high production efficiency and ensure melting Welding quality, uniform effect of sandblasting
Pending Publication Date: 2021-11-16
JIANGSU KEHUAN INNOVATIVE MATERIAL CO LTD +1
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Abstract
The invention relates to the technical field of methods for intensifying explosion-proof pipes by induction fusion welding and surfacing subareas, in particular to a method for intensifying the explosion-proof pipes by induction fusion welding and surfacing subareas on the fire-facing side of a boiler pipeline. The method comprises the following steps of performing sand blasting roughening treatment on the surface of a pipe top area of a pipe bank by an automatic sand blasting machine; enabling the pipe top part to be automatically surfaced by plasma arc, wherein the thickness is about 2.5 mm; enabling deformation of the pipe bank to be strictly controlled and corrected by adopting a special tool; using the automatic sand blasting machine to carry out sand blasting treatment on the parts, except for the surfacing part of the pipe top of the pipe bank, of the surface; preparing a nickel-based self-fluxing alloy coating on the part, except the surfacing surface, of the surface of the pipe bank through flame spraying, wherein the thickness is about 0.5 mm; and performing high-frequency induction remelting on a sprayed coating, and determining the process parameters, such as power supply frequency, heating specific power, heating starting time and pipe bank moving speed of high-frequency induction remelting. The worry of pipe explosion of manufacturers can be avoided, the service life is basically equivalent to that of complete surfacing welding, the purpose of being safe to use can be achieved, and most enterprises including small and medium-sized enterprises can pay for the method.
Application Domain
Molten spray coatingPlasma welding apparatus
Technology Topic
Fusion weldingEngineering +6
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