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Sintered flux for stainless steel welding wire containing niobium and titanium, and preparation method and application thereof

A technology of sintering flux and stainless steel, applied in welding equipment, welding medium, manufacturing tools, etc., can solve the problems of poor and different slag removal performance in submerged arc welding, and achieve excellent slag removal performance, smooth transition, and moderate pile height Effect

Active Publication Date: 2018-11-02
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because Nb and Ti elements are relatively active, they are easily oxidized to NbO and TiO during the welding process, and the lattice size of NbO and TiO is closer to that of α-Fe than that of FeO, so NbO and TiO are easier to combine with α-Fe. The crystal lattice is connected, resulting in poor slag removal performance of submerged arc welding containing Nb, Ti welding wire or base metal
[0004] At present, it is difficult to find a sintered flux that matches the Nb-containing welding wire ER347 and matches the Ti-containing welding wire ER321 with excellent slag removal performance
Search literature and patents, find some sintered fluxes for stainless steel strip overlay welding and wire submerged arc welding, but few of them involve matching welding wires and welding strips containing Nb and Ti elements. Even if it is involved, the composition of the fluxes The points, scope of application and key technical route are also different from those described in this patent

Method used

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  • Sintered flux for stainless steel welding wire containing niobium and titanium, and preparation method and application thereof
  • Sintered flux for stainless steel welding wire containing niobium and titanium, and preparation method and application thereof
  • Sintered flux for stainless steel welding wire containing niobium and titanium, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] A sintered flux for niobium-containing titanium stainless steel welding wire, comprising the following components in parts by mass:

[0047]

[0048] The preparation method of the sintered flux for the niobium-containing titanium stainless steel welding wire comprises the following steps:

[0049] (1) All the components of the sintered flux used for the niobium-titanium stainless steel welding wire except the potassium sodium 1:1 water glass are mixed and put into the mixer to fully dry mix to obtain the mixture;

[0050] (2) wet mixing the mixture prepared by step (1) with water glass to obtain a wet mixture;

[0051] (3) Put the wet mixture prepared in step (2) into a granulator for granulation, send the granules into a 300-330°C rotary drying furnace for drying for 30 minutes, and send them into a rotary sintering after drying The furnace is sintered at high temperature, the sintering temperature is 630-640°C, and the sintering time is 30 minutes. After cooling o...

Embodiment 2

[0053] A sintered flux for niobium-containing titanium stainless steel welding wire, comprising the following components in parts by mass:

[0054]

[0055] The preparation method of the sintered flux for the niobium-containing titanium stainless steel welding wire comprises the following steps:

[0056] (1) All the components of the sintered flux used for the niobium-titanium stainless steel welding wire except the potassium sodium 1:1 water glass are mixed and put into the mixer to fully dry mix to obtain the mixture;

[0057] (2) wet mixing the mixture prepared by step (1) with water glass to obtain a wet mixture;

[0058] (3) Put the wet mixture prepared in step (2) into a granulator for granulation, and send the granules into a rotary drying furnace at 340-360°C for drying for 40 minutes, and then send them into rotary sintering after drying The furnace is sintered at high temperature, the sintering temperature is 660-670°C, and the sintering time is 40 minutes. After...

Embodiment 3

[0060] A sintered flux for niobium-containing titanium stainless steel welding wire, comprising the following components in parts by mass:

[0061]

[0062]

[0063] The preparation method of the sintered flux for the niobium-containing titanium stainless steel welding wire comprises the following steps:

[0064] (1) All the components of the sintered flux used for the niobium-titanium stainless steel welding wire except the potassium sodium 1:1 water glass are mixed and put into the mixer to fully dry mix to obtain the mixture;

[0065] (2) wet mixing the mixture prepared by step (1) with water glass to obtain a wet mixture;

[0066] (3) Put the wet mixture prepared in step (2) into a granulator for granulation, and send the granules into a 380-400°C rotary drying furnace for drying for 50 minutes, and then send them into a rotary sintering after drying The furnace is sintered at a high temperature, the sintering temperature is 720-730°C, and the sintering time is 50 m...

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Abstract

The invention belongs to the technical field of welding materials and particularly relates to sintered flux for a stainless steel welding wire containing niobium and titanium, and a preparation methodand application thereof. The sintered flux for the stainless steel welding wire containing niobium and titanium comprises the following components of, by mass, 51-53 parts of CaF2, 40-42 parts of Al2O3, 0.5-2 parts of CaSiO3, 1-2 parts of K3AlF6, 0.8-1.2 parts of KMnO4 and 28-30 parts of sodium silicate. The sintered flux is prepared through the steps of compounding, dry mixing, wet mixing, pelletizing, drying, sintering, sieving and the like, the flux is matched with ER321 and ER34 submerged arc welding wires which conform to the standard of AWS A5.9, and the weld bead deslagging property, the weld bead forming property and the deposited metal property are good; and the flux is simple in component and low in cost, and has large market promotion prospects and good economic benefits with continuous expanding of the field of intercrystalline corrosion resistance application of austenitic stainless steel.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a sintered flux used for niobium-titanium stainless steel welding wire, a preparation method and application thereof. Background technique [0002] In order to improve the intergranular corrosion resistance of austenitic stainless steel, the existing relatively mature technology is to add 8C~1.0% Nb or (C-0.02)×5~0.8% Ti to austenitic stainless steel, because both It can combine with C element more easily than Cr element to form more stable carbide NbC or TiC, thereby reducing carbon-chromium compound (Cr, Fe) in stainless steel 7 C 3 and (C, Fe) 23 C 6 The formation and precipitation of the chromium-depleted area of ​​the grain boundary are avoided, thereby preventing the occurrence of intergranular corrosion. [0003] The Nb-containing submerged arc welding wire listed in AWS A5.9 "Stainless Steel Light Welding Wire and Filling Wire Standard" and widel...

Claims

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Application Information

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IPC IPC(8): B23K35/36B23K35/40
CPCB23K35/3605B23K35/40
Inventor 王效莲王青云
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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