Laser surface cladding method of boiler water wall tube of thermal power station
A water-cooled wall tube and laser cladding technology, applied in the field of thermal power station boiler water-cooled wall tube, can solve the problems of easy peeling service life, cooling medium damage, heating tube explosion, etc., to avoid high temperature aging, excellent high temperature performance, avoid cracking effect
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Embodiment 1
[0032] Embodiment 1: A laser cladding strengthening method for water-cooled wall tubes (T91) of a power plant furnace includes the following steps:
[0033] 1) Preparing the preset paint: the weight ratio of the light-absorbing paint of the preset paint to Ni-based alloy powder is 1:1, and the composition ratio of the selected light-absorbing paint is:
[0034]
[0035] The composition ratio of described Ni-based multi-element alloy powder is:
[0036]
[0037] Weigh the raw materials according to the selected ratio. The weight percentage of the light-absorbing paint and Ni-based alloy powder in the preset coating is 1:1. After fully dispersing and mixing in a nano-scale wet grinding machine for 3 hours, put the Ni-based multi-element alloy powder into it, and fully disperse and mix for 4 hours to form a coating;
[0038] 2) coating the glue on the surface of the water-cooled wall tube, the thickness of the coating layer is 0.35mm;
[0039] 3) Under the protection of a...
Embodiment 2
[0040] Embodiment 2: adopt carbon dioxide laser processing machine to carry out laser cladding to described water-cooled wall tube (15CrMo), comprise the following steps:
[0041] 1) Prepare preset paint:
[0042] The weight ratio of the light-absorbing paint of the preset paint to the Ni-based alloy powder is 1:1.25, and the composition ratio of the light-absorbing paint is:
[0043]
[0044]
[0045] The composition ratio of described Ni-based multi-element alloy powder is:
[0046]
[0047] Weigh the raw materials according to the selected ratio, the weight percentage of the light-absorbing paint and Ni-based alloy powder in the preset coating is 1:1.25, put the light-absorbing paint into high-speed circulation, large-flow ultra-fine After fully dispersing and mixing in a nano-scale wet grinding machine for 4 hours, put the Ni-based multi-element alloy powder into it, and fully disperse and mix for 3 hours to form a coating;
[0048] 2) Coating the glue coating o...
Embodiment 3
[0050] Embodiment 3: adopting carbon dioxide laser processing machine to carry out laser cladding to described water-cooled wall tube (T91), comprises the following steps:
[0051] 1) Preparation of preset paint: the weight ratio of the light-absorbing paint of the preset paint to Ni-based alloy powder is 1:1.2, and the composition ratio of the selected light-absorbing paint is:
[0052]
[0053]
[0054] The composition ratio of described Ni-based multi-element alloy powder is:
[0055]
[0056] Weigh the raw materials according to the selected ratio. The weight percentage of the light-absorbing paint and Ni-based alloy powder in the preset coating is 1:1.1. After fully dispersing and mixing in a nano-scale wet grinding machine for 4 hours, add the Ni-based multi-element alloy powder, and fully disperse and mix for 4 hours to form a coating;
[0057] 2) Coating the glue coating on the surface of the water-cooled wall tube, the thickness of the coating layer is 0.4mm; ...
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