Filling metal particle for welding and manufacturing method therefor

A technology of filling metal and metal particles, applied in welding equipment, metal processing equipment, welding medium, etc., can solve the problems of difficult wire, complicated manufacturing process, high production cost, etc., and achieve full and reasonable utilization and simple production process Effect

Inactive Publication Date: 2007-08-08
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production process of the above-mentioned shredded welding wire is to use the hot-rolled wire rod for welding produced by the iron and steel enterprise as the raw material, make a filament with a certain diameter after multiple passes of cold drawing, and then cut the wire to make a cylindrically shaped shredded welding wire (see "Installation" magazine, No. 5 article in 2003 "Welding method of large oil tank bottom plate-broken wire submerged arc welding"), its manufacturing process is relatively complicated
The broken welding wire and its production process have the following deficiencies: first, the alloy composition of the b

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1: Preparation and application of filler metal particles for submerged arc welding

[0045] The chemical composition of the filling metal particles is designed to be (mass%), 0.08C, 0.35Si, 1.45Mn, 0.02Nb, 0.035V, 0.02Ti, 0.18Mo, 0.24Ni, S and P not exceeding 0.03.

[0046] (1) Selection of steel scrap: According to the chemical composition requirements of the filler metal, scraps of low-carbon microalloy steel with a tensile strength of 610MPa are selected to produce filler metal particles. The chemical composition of the scraps is (mass%): 0.09C, 1.47Mn, 0.22 Si, 0.26Ni, 0.18Mo, 0.042V, 0.016Ti, 0.002S, 0.007P.

[0047] (2) According to the chemical composition design index of the filler metal particles for submerged arc welding, and according to the chemical composition of the steel scrap selected in step (1), determine the type and quantity of the alloying agent to be added as follows:

[0048] The total mass of charge is 0.07% ferromolybdenum (containin...

Embodiment 2

[0059] Embodiment 2: Filler metal particles for gas shielded welding with tensile strength 700MPa

[0060] The chemical composition of the filler metal particles is designed (mass%), 0.08%C, 0.56%Si, 1.65%Mn, 0.15%Ti, 0.28%Mo, 1.28%Ni, 0.18%Cu, S and P are not more than 0.03.

[0061] (1) Selection of steel scrap: Steel scrap is selected according to the chemical composition requirements of the filler metal. The chemical composition (mass%) of steel scrap is: 0.06%C, 0.28%Si, 1.55%Mn, 0.014%Ti, 0.22%Mo, 0.45%Ni , 0.2% Cu, 0.011% P, 0.004% S.

[0062] (2) According to the chemical composition design index of filler metal particle, according to the chemical composition of step (1) selected scrap steel, determine the kind and the quantity of adding alloying agent as follows: the ferromolybdenum (containing 55% Mo) of charge total mass 0.25%, 1.5 % ferrosilicon (containing 45% Si), 0.95% metallic nickel, 0.6% ferromanganese (containing 79% Mn), 2% ferro-titanium (containing 27% T...

Embodiment 3

[0072] Embodiment 3: Tensile strength 500MPa level filling metal particles

[0073] Scrap steel with impurity content such as S and P meeting the requirements of welding materials is selected, and alloy elements are not added to prepare filler metal particles with a tensile strength of 500 MPa suitable for structural steel welding.

[0074] (1) Selection of steel scrap: Q345 steel scrap is selected as the raw material for producing filler metal particles, and its main chemical composition is (mass%): 0.18C, 1.48Mn, 0.39Si, 0.017S, 0.015P.

[0075] (2) Divide the steel scrap selected in step (1) into two parts, A and B. Put part A into the induction melting furnace first, and melt it in the shortest time with the maximum power of the induction furnace. The quantity of part A depends on the furnace The size of the molten steel is determined based on the principle that the molten steel can have a depth of 13mm to 17mm; then the flux 431 for submerged arc welding is added as a sla...

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PUM

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Abstract

A stuffing metal grain for soldering with diameter of 0.1-5.0mm, with the mass percentage of C less than 0.15%, S less than 0.035%, P less than 0.035%, oxygen less than 50ppm, nitrogen less than 50ppm, with other alloy elements like Mn being 0.1%-2.0%, Si 0.02%-1.8%, Mo less than 2.5%, Cr less than 3.5%, Ni less than 6.0%, Ti less than 0.5%, V less than 0.5%, Nb less than 0.5%, Cu less than 0.5%, and B less than 0.09%. It is simple in process, with greatly reduced cost.

Description

technical field [0001] The invention relates to a welding material and a production method thereof, in particular to a novel filler metal particle for welding and a preparation method thereof. Background technique [0002] With the development of welded structures in the direction of large-scale and high-parameterization, the number of welded structural parts above medium thickness has increased dramatically. The welding processes currently used are generally submerged arc welding, gas shielded welding, electrode arc welding, and gas-electric vertical welding. When welding, prefabricate the groove on the edge of the steel plate, add a backing plate (or liner) on the back or use a small welding heat input to weld the bottom weld at the bottom of the groove, and then perform multi-layer and multi-pass welding. Electrode arc welding requires constant replacement of electrodes, which not only reduces production efficiency, but also easily produces welding defects at the joints ...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/02B22F9/08C22C1/02
Inventor 孙俊生李宁洋孙逸群
Owner SHANDONG UNIV
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