A carbon steel-nickel alloy composite plate laser butt welding method
A composite plate and nickel alloy technology, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of high cost of welding materials, large welding deformation, and low welding efficiency, so as to reduce welding procedures, The heat-affected zone is narrow and the effect of reducing the cost of welding materials
Active Publication Date: 2022-02-18
SHANGHAI JIAOTONG UNIV
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Problems solved by technology
[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to solve the problems of large amount of deformation in butt welding of carbon steel-nickel-containing corrosion-resistant alloy composite plates, high cost of welding materials, and low welding efficiency
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Embodiment 1
[0034] In this embodiment, take (3.8+17)mm IN825 / L450 composite plate as an example for welding, refer to Figure 1-5 Describe the specific operation steps.
[0035] According to step 1, a U-shaped bevel 3 is processed on the side of the carbon steel base 1 by mechanical milling, with a unilateral bevel of 6°, and a stainless steel or nickel-based alloy cladding 2 is processed so that the side end surface of the carbon steel base 1 is in line with the The side of the stainless steel or nickel-based alloy cladding 2 forms a ladder-shaped structure, which is polished with sandpaper and cleaned with ethanol and acetone to clean the oil stains and oxide films on the surface of the groove and within 15mm of its vicinity.
[0036] According to step 2, the test plate is clamped by assembly to ensure that the gap between the grooves is less than 0.1mm, and the amount of misalignment of the groove is less than 0.1mm. The lower width d of the U-shaped groove 3 of the carbon steel base 1...
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Abstract
The invention discloses a carbon steel-nickel-containing alloy composite plate laser butt welding method. Through the ultra-narrow gap U-shaped groove design of the carbon steel base, welding is performed from the side of the carbon steel base, and the stainless steel or nickel-based alloy coating is firstly applied. The I-shaped butt joint is welded by laser self-fusion welding or laser wire-filled welding for one penetration, and then laser-filled wire welding is used to form the first shallow penetration feature in the U-shaped groove on the stainless steel or nickel-based alloy cladding weld. For the first carbon steel weld, laser filler wire welding is used to continue welding on the first carbon steel weld to form the subsequent filler weld of the carbon steel base until the U-shaped groove is filled to complete the carbon steel-nickel alloy composite Butt welding of plates. For some situations where the cladding side cannot be welded due to the connection of small-diameter composite pipes or the structure of limited space, the invention can perform single-sided welding from the base layer side, which effectively solves the above problems. In addition, the invention reduces the filling amount of welding wire , welding deformation and residual tensile stress, improving welding efficiency and quality.
Description
technical field [0001] The invention relates to the field of metal welding, in particular to a laser butt welding method for a carbon steel-nickel-containing alloy composite plate. Background technique [0002] With the complexity of engineering environmental media, in most engineering fields, it is difficult for a single component material to meet the cost and performance requirements at the same time. The material composed of two or more metals with different properties through certain processing and preparation methods has both The material with the respective advantages of the two metal components is called a bimetal composite plate. Among them, carbon steel is used as the base layer, a certain thickness of stainless steel or nickel-based alloy is used as the coating, and the carbon steel-nickel alloy composite plate with a solid metallurgical bond is achieved through explosive welding, vacuum rolling or other composite methods. The high plasticity, high toughness and h...
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IPC IPC(8): B23K26/26B23K26/60B23K26/70
CPCB23K26/26B23K26/60B23K26/702
Inventor 黄坚范昊天聂璞林姚成武
Owner SHANGHAI JIAOTONG UNIV