A kind of multi-component flux-cored welding wire and preparation method thereof
A flux-cored welding wire, multi-component technology, applied in welding equipment, manufacturing tools, welding media, etc., can solve the problems of discontinuous structure, harmful mechanical properties, single performance, etc., to reduce frequent replacement of welding wire, avoid structural discontinuity, Realize the effect of resource utilization
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[0025] The preparation method of a multi-component flux-cored welding wire of the present invention is based on the parts to be welded, selects the optimal welding path, and combines the required performance through numerical simulation according to the different requirements of different positions of the weld seam for various performances , taking the existing welding technology and flux-cored wire characteristics as a reference, calculate and simulate the composition and proportion of flux-cored wire for different welding seam requirements, and determine the parameters such as length, welding speed, path, welding voltage, welding current, and welding torch distance . Combined with the traditional flux-cored wire processing technology, the "programmable" design and manufacture of flux-cored wires and targeted applications are realized, and finally a flux-cored wire with different core components in each section and no composition transition in the middle is manufactured.
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Embodiment 1
[0039] When welding the welds in the marine equipment structure, due to the different distances from the waterline, the requirements for anti-corrosion are different. Through this method, numerical simulation is carried out on the composition of different parts of the weld according to requirements, so as to calculate the gradient distribution of the weld composition. The content of each element is C≤0.08%, N: 0.50~0.80%, Mn: 16.50~17.50%, Cr: 20.00~22.00%, Mo: 3.50~4.50%, Si: 0.55~0.95%, S≤0.01%, P≤0.02%, Ni varies with requirements, and the balance is Fe. It is required that the Ni content of the weld at the waterline is 2.0%. For every 1m above the waterline, the Ni content is reduced by 0.01%, and for every 1m below the waterline, the Ni content is increased by 0.05%. At the same time, SPCC-SD cold rolling is adopted The low carbon steel strip is used as the raw material of the welding wire with a diameter of 4.0mm. In this way, the flux-cored welding wire is manufacture...
Embodiment 2
[0041] When this welding wire is applied to arc-fused wire additive manufacturing, precise gradient forming can be achieved for some high-performance components. Through the numerical simulation of the relevant thermal and mechanical properties of the required parts, the different components required for different performances in different parts of the material can be calculated. 5087 aluminum alloy is used as the main component, and the content of Ti element is changed. Carbon steel as a crust. At the same time, combined with the planning of the welding torch walking path, the gradient distribution of the required flux-cored wire composition is obtained and produced, and then the flux-cored wire is used for arc fuse additive manufacturing, and the welding torch travel speed is 0.6m min -1 , wire feeding speed 6m·min -1 , interlayer cooling time 2min, 99.99% argon as protective gas, flow rate 25L min -1 , the distance between the contact tip and the workpiece is 15mm, so as ...
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