A low-silicon, low-phosphorus, high-toughness sintered flux for additive manufacturing and its application

A technology of additive manufacturing and sintering flux, applied in the direction of manufacturing tools, welding equipment, welding media, etc., can solve the problems of difficult research and development, no research and patent declaration, etc., and achieve good slag removal and excellent dephosphorization effect, the effect of low phosphorus content

Active Publication Date: 2018-10-02
WUHAN TEMO WELDING CONSUMABLES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the high specification requirements for component material composition and mechanical properties in the relevant ASTM standards, such as the arc welding seam structure needs to meet the performance of metal forgings and workpieces in various heat treatment states, its research and development is quite difficult. At this stage, domestic and foreign high-end welding consumables enterprises None of them have yet developed corresponding matching welding materials, searched for similar patents, and there is no application for this research patent at present

Method used

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  • A low-silicon, low-phosphorus, high-toughness sintered flux for additive manufacturing and its application

Examples

Experimental program
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Effect test

Embodiment 1

[0034] This embodiment provides a low-silicon, low-phosphorus, high-toughness sintered flux for additive manufacturing, including the following components by weight percentage: MgO: 8%, CaF 2 :31%, Al 2 o 3 : 24%, TiO 2 : 2%, SiO 2 : 12%, CaO: 10%, Na 3 AlF 6 :5%, Li 2 CO 3 : 3%, rare earth fluoride: 1%, light rare earth oxide: 2%, MnO: 2%; wherein, the above-mentioned components contain unavoidable impurities, among which S≤0.01%, P≤0.01%.

[0035] Preparation method: after the re-inspection of the required raw materials of each component is qualified, after sieving, carry out proportioning and weighing according to the above formula, and then put it into a dry blender for dry blending, and put the evenly stirred powder into a wet blender, Add about 18-20% of the weight of the powder into water glass for wet mixing, fully stir evenly, send the stirred powder into the granulator for granulation, and send the granulated flux to the drying furnace after drying. Dry at a ...

Embodiment 2

[0039] This embodiment provides a low-silicon, low-phosphorus, high-toughness sintered flux for additive manufacturing, including the following components by weight percentage: MgO: 15%, CaF 2 :25%, Al 2 o 3 :18%, TiO 2 : 4%, SiO 2 : 16%, CaO: 10%, Na 3 AlF 6 :4%, Li 2 CO 3 : 2%, rare earth fluoride: 3%, light rare earth oxide: 1%, MnO: 2%; wherein, the above-mentioned components contain unavoidable impurities, among which S≤0.01%, P≤0.01%.

[0040] The preparation method is the same as in Example 1.

[0041] Before welding, the sintered flux prepared in this example is dried at 350-400°C for 1 hour and then used for welding test. It is welded with welding wire MCJ3D336F12. Fine and compact, beautifully formed.

[0042] The chemical composition of the welding wire MCJ3D336F12 in this example is shown in Table 1. The low-silicon, low-phosphorus, high-toughness sintered flux for additive manufacturing prepared in this example is deposited with the welding wire MCJ3D336F...

Embodiment 3

[0044] This embodiment provides a low-silicon, low-phosphorus, high-toughness sintered flux for additive manufacturing, including the following components by weight percentage: MgO: 10%, CaF 2 :28%, Al 2 o 3 :21%, TiO 2 : 2%, SiO 2 : 14%, CaO: 13%, Na 3 AlF 6 :3%, Li 2 CO 3 : 2%, rare earth fluoride: 2%, light rare earth oxide: 2%, MnO: 3%; wherein, the above-mentioned components contain unavoidable impurities, among which S≤0.01%, P≤0.01%.

[0045] The preparation method is the same as in Example 1.

[0046] Before welding, the sintered flux prepared in this example is dried at 350-400°C for 1 hour and then used for welding test. It is welded with welding wire MCJ3D336F12. Fine and compact, beautifully formed.

[0047] The chemical composition of the welding wire MCJ3D336F12 in this example is shown in Table 1. The low-silicon, low-phosphorus, high-toughness sintered flux for additive manufacturing prepared in this example is deposited with the welding wire MCJ3D336F...

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Abstract

The invention provides a low-silicon low-phosphorous high-toughness sintered flux for additive manufacturing and application of the sintered flux. The sintered flux comprises the following components in percentage by weight: 8-15% of MgO, 25-31% of CaF2, 17-24% of Al2O3, 2-6% of TiO2, 12-18% of SiO2, 10-16% of CaO, 2-5% of Na3AlF6, 1-3% of Li2CO3, 1-3% of rare earth fluoride, 1-3% of a light rare earth oxide and 1-3% of MnO. The sintered flux has the advantages that not only is the own phosphorous content low, but also the dephosphorization effect is excellent; after welding, each welding seam is protected from silicon increasing and phosphorous increasing; the sintered flux is applied to 3D printing of a nuclear power steam generator and a penetrating piece; when the sintered flux is cooperatively used with an additive manufacturing welding wire MCJ3D336F12 for surfacing welding, such welding process properties as the deslagging property, the anti-porosity property and the spreading property are good, ripples of each weld bead are close, the welding appearance is beautiful, and the anti-cracking property is good; and the Charpy impact energy (at minus 18 DEG C) of the sintered flux can reach 150 J or above.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a low-silicon, low-phosphorus, high-toughness sintered flux for additive manufacturing and its application. Background technique [0002] Additive manufacturing, also known as 3D printing technology, is a technology that directly manufactures physical parts from digital models by layer-by-layer accumulation. This technology is a new short-cycle, low-cost manufacturing technology. It has important application prospects in the fields of aviation, aerospace, nuclear power equipment and biomedicine. At present, the development of additive manufacturing forming technology for heavy metal components is extremely slow due to the development progress of its application materials, that is, welding materials. Due to the high specification requirements for component material composition and mechanical properties in the relevant ASTM standards, such as the arc welding ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B23K35/362B23K9/04B23K35/30
CPCB23K9/04B23K35/3086B23K35/3605B23K35/362
Inventor徐文福刘学军刘东蒋笑卢伟
OwnerWUHAN TEMO WELDING CONSUMABLES CO LTD