A kind of submerged arc automatic welding method of nickel base alloy
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A technology of submerged arc automatic welding and nickel-based alloys, which is applied in the direction of welding medium, welding equipment, welding equipment, etc., can solve problems such as easy-to-produce defects, achieve the effects of improving welding quality, improving the first pass rate, and preventing hot cracks
Active Publication Date: 2017-03-15
LUXI IND EQUIP
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[0003] The purpose of the present invention is to overcome the deficiencies of the prior art above, to provide a nickel-based alloy submerged arc automatic welding welding method, which solves the difficult problem that nickel-based alloy submerged arc welding is prone to defects, and realizes the nickel-based alloy submerged arc automatic welding method. Welding reduces the labor intensity of welders and greatly improves welding efficiency while ensuring welding quality
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Embodiment 1
[0030] Embodiment 1: a kind of submerged arc automatic welding welding method of 18mm thick nickel base alloy N10276, such as Figure 1-2 shown, including the following steps:
[0031] Among them, the groove form is as image 3 As shown, the V-shaped groove is adopted, the groove angle is 65°, the blunt edge is 2±1mm, the pair gap is 3+1mm, and the welding sequence of the weld bead is as follows Figure 4 As shown, the welding process parameters are shown in Table 2.
[0032] Table 2 Welding process parameters of embodiment 1 of the present invention
[0033]
[0034] 1) The groove is processed into a V shape, and the groove angle is 65°. Compared with steel, the groove angle is larger and the gap is larger, so as to overcome the defects of poor liquid fluidity, easy generation of pores and unfused defects of the base metal;
[0035] 2) Use a stainless steel wire brush to clean the welding wire, the surface of the groove and the range of 50mm on both sides of the groove,...
Embodiment 2
[0039] A kind of submerged arc automatic welding welding method of 12mm thick nickel-based alloy N10276, such as Figure 1-2 shown, including the following steps:
[0040] Among them, the groove form is as Figure 5 As shown, the V-shaped groove is adopted, the groove angle is 75°, the blunt edge is 2±1mm, the pair gap is 3+1mm, and the welding sequence of the weld bead is as follows Figure 6 As shown, the welding process parameters are shown in Table 3.
[0041] Table 3 welding process parameter of embodiment 2 of the present invention
[0042]
[0043] 1) Process the groove into a V shape with a groove angle of 75°;
[0044] 2) Use a stainless steel wire brush to clean the welding wire, the surface of the groove and the range of 50mm on both sides of the groove, and use ethanol to clean if necessary according to the degree of surface pollution;
[0045] 3) Determine the welding parameters of the bottom layer, and use argon tungsten arc welding for bottom layer welding....
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Abstract
The invention discloses an automatic submerged arc welding method of nickel base alloy. The method includes the following steps that a groove is machined to be in a V shape, and the angle of the groove ranges from 65 degrees to 75 degrees; cleaning is conducted before welding; the welding parameters of a backing layer are determined; the welding parameters of packing layers and cover surface layers are determined; when packing and cover surface welding needs to be multi-layer multi-welding, each welding seam is made to be in a slightly-protruding shape; before welding is conducted on the next layer, the angle of the groove reserved in the previous welding seam and the root width are examined to guarantee that the groove angle is larger than or equal to 60 degrees. By means of the automatic submerged arc welding method, according to the welding feature of the nickel base alloy N10276, the models and specifications of welding materials are selected and matched reasonably, the optimal welding parameters are determined, the welding heat input is controlled effectively, heat cracks are prevented form being generated in the welding process, automatic submerged arc welding of the nickel base alloy is achieved, the welding efficiency of automatic submerged arc welding is 4 times to 5 times the welding efficiency of shielded metal-arc welding rod welding and 8 times to 10 times the welding efficiency of tungsten electrode argon arc welding, the welding efficiency is improved greatly, the welding labor intensity is lowered, and welding quality is improved.
Description
technical field [0001] The invention relates to the field of welding technology, in particular to a submerged arc automatic welding method for nickel-based alloys, especially nickel-based alloys with a thickness greater than 10mm. Background technique [0002] At present, the heat input control requirements of nickel-based alloy N10276 welding are relatively strict: if the heat input is too large, it is easy to cause thermal cracks; At the same time, nickel-based alloys have poor fluidity, and slag inclusions and unfused layers are prone to occur between layers. Because nickel-based alloy N10276 has the above problems, in order to better control the heat input and ensure the quality of the weld bead, argon tungsten arc welding is traditionally selected , Manual arc electrode welding for welding, low welding efficiency, high labor intensity, and prone to quality problems. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencie...
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