CN102240871A - Sintered flux for stainless steel submerged arc deposited metal nitrogen alloying - Google Patents
Sintered flux for stainless steel submerged arc deposited metal nitrogen alloying Download PDFInfo
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- CN102240871A CN102240871A CN2011101156297A CN201110115629A CN102240871A CN 102240871 A CN102240871 A CN 102240871A CN 2011101156297 A CN2011101156297 A CN 2011101156297A CN 201110115629 A CN201110115629 A CN 201110115629A CN 102240871 A CN102240871 A CN 102240871A
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Abstract
The invention discloses a sintered flux for stainless steel submerged arc deposited metal nitrogen alloying. The sintered flux is characterized by comprising a base flux and an additive flux; based on the weight of the total flux, the base flux comprises the following chemical components: 20 to 25 percent of CaF2, 25 to 30 percent of MgO, 20 to 23 percent of Al2O3, 15 to 20 percent of SiO2, 3 to 7 percent of CaCO3, and 3 to 8 percent of deoxidier; and the additive flux is a nitrogen-containing metal compound. An appropriate amount of nitrogen-containing metal compound is uniformly mixed into the common submerged arc overlaying sintered flux for welding. In the overlaying process, the nitrogen-containing metal compound is fully molten and transited into a molten pool under the action of arc heat, so that the deposited metal contains an appropriate amount of nitrogen elements, the aim of the deposited metal alloying is fulfilled, and the comprehensive performance of the overlaying material is improved. The sintered flux is low in cost and is easy to implement. The arc is stable in the welding process, and the defects of welding air holes and the like are avoided.
Description
Technical field
The present invention relates to a kind of sintered flux that is used for stainless steel submerged arc overlay welding metal nitrogen alloying, belong to technical field of welding materials.
Background technology
Submerged arc overlay welding is the method for arc protection weldering under a kind of welding flux layer, and surfacing is compound to metal surface enhanced technology on the common metal part time job face (stress surface), can strengthen the anti-wear performance of machinery part surface.Nitrogen interacts with other alloying element as interstitial atom, can improve intensity, toughness, creep resistance, wearability and the decay resistance of steel.Carry out alloying with nitrogen in welding material, can improve anti-HOT CRACK FOR WELDING P, erosion resistant and the high temperature stability performance of part, the beneficial effect that makes full use of nitrogen carries out nitrogen alloying, can be used as the new way of improving the resurfacing welding material combination property.Nitrided ferro-chromium is widely used in special steels such as stainless steel, heat resisting steel, corrosion resisting steel, steel alloy and smelts production, and the adding nitrided ferro-chromium has the double action to nitrogen pick-up of stainless steel deposited metal and additional chromium in submerged arc welding flux.
Summary of the invention
Technical purpose of the present invention is: a kind of sintered flux that is used for stainless steel submerged arc overlay welding metal nitrogen alloying is provided, improve the combination property of resurfacing welding material, be applicable to the coal-grinding roller, engineering excavation machinery, the surface modification of mining machinery, compound manufacturing in roll, the thermal power plant of steel plant and aspect such as manufacturing again.
In order to realize above-mentioned technical purpose, the invention discloses a kind of sintered flux that is used for stainless steel submerged arc overlay welding metal nitrogen alloying, it is characterized in that, comprise basic solder flux and add flux component:
The chemical constituent of described basic solder flux and the percentage by weight that accounts for overall solder flux are:
CaF
2：20％-25％；
MgO：25％-30％；
Al
2O
3：20％-23％；
SiO
2：15％-20％；
CaCO
3：3％-7％；
Deoxidier: 3%-8%;
Described interpolation solder flux is the nitrogen containing metal compound.
As preferably, described interpolation solder flux is that mass fraction is the nitrided ferro-chromium powder of 6%-15%.Nitrided ferro-chromium is fully melted under the effect of arc heat excessively in the built-up welding pond, can not cause being mingled with of molten or fritting.
As preferably, described nitrided ferro-chromium powder particle size is the 10-60 order.
As preferably, described nitrided ferro-chromium powder mainly contains Fe, N, three kinds of elements of Cr, and wherein nitrogen content is 3.0%-5.0%, and chromium content is more than or equal to 60%.
As preferably, described deoxidier is the silicomanganese double deoxidizer.
The nitrogen containing metal compound is fully melted under the effect of arc heat to be carried out the transition in the built-up welding molten bath, and nitrogen content is low excessively in the deposited metal, and a large amount of solid solution of nitrogen meeting makes that the carbonitride in the surfacing layer metal is few, and the anti-wear performance of metal surface can not get effective raising like this; Nitrogen content is too high, pore appears in the welding process easily, therefore the amount of the nitrogen containing metal compound that adds must be controlled in the suitable scope, as optimal proportion, content with nitrided ferro-chromium is limited between the 6%-15% in the present invention, contains the 0.10%-0.13% nitrogen content in the deposited metal nitrogen alloy of welding back.
If the relative sintered flux of nitrogen containing metal compound powder particle size is undersized, cause layering easily, make that the flux constituent prepare is inhomogeneous, nitrogen can not be stablized and carries out the transition in the molten pool metal in welding process; If the relative sintered flux of nitrogen containing metal compound powder particle size is oversize, then cause in the welding process local nitrogen content excessive easily, pore takes place.Therefore, the particle size of nitrogen containing metal compound should guarantee can fully mix with sintered flux, guarantees that nitrogen can be stablized in the welding process to carry out the transition in the molten pool metal, so in the present invention the size range of nitrogen containing metal compound is defined as the 10-60 order.
Simultaneously, submerged arc overlay welding utilizes solder flux to join welding wire for submerged-arc welding and welds, and has economy, characteristics such as reliable, efficient, and adopting the advantage of sintered flux is that alloying is very convenient, provides good condition for realizing stainless steel deposited metal nitrogen alloying.
The specific embodiment
In order to illustrate technical scheme of the present invention and technical purpose, the present invention is further introduced below in conjunction with specific embodiment:
The nitrided ferro-chromium powder is evenly sneaked in the common submerged arc overlay welding sintered flux concrete constituent content following (by weight percentage):
The basis solder flux:
CaF
2：20％-25％；
MgO：25％-30％；
Al
2O
3：20％-23％；
SiO
2：15％-20％；
CaCO
3：3％-7％；
Silicomanganese double deoxidizer: 3%-8%;
Adding flux component is that granular size is 10-60 purpose nitrided ferro-chromium powder (nitrogen content is 4.2%, chrome content 65%): 8%;
By the said components proportioning, nitrided ferro-chromium powder and other composition are evenly mixed.The sintered flux for preparing cooperates with the stainless steel welding wire for submerged-arc welding of diameter 3.2mm, adopts the welding of MZ-1000 type direct current automatic submerged-arc welding machine, dc reverse connection, and the welding mother metal is the thick Q235 steel plate of 10mm, three layers of built-up welding.Wherein the bead-welding technology parameter sees table 1 for details.Cut surperficial sample at the 3rd layer of overlay cladding then, carry out the chemical composition check and analysis.
Above-mentioned example solder flux arc stability in welding process, defectives such as through ultrasound examination, the interior nothing of overlay cladding is mingled with, pore, crackle.Sintered flux of the present invention is joined the built-up welding of stainless steel welding wire for submerged-arc welding and is had the excellent metallurgical performance, and the deposited metal nitrogen content is 0.12%, satisfies the requirement of nitrogen alloying, has good serviceability.
Table 1 bead-welding technology parameter
| Voltage (V) | Electric current (A) | Speed of welding (m/h) | Stem elongation (mm) |
| 30～35 | 350～400 | 18～23 | 15～20 |
Below disclose the present invention with preferred embodiment, so it is not in order to restriction the present invention, and all employings are equal to replaces or technical scheme that the equivalent transformation mode is obtained, all drops within protection scope of the present invention.
Claims (5)
1. a sintered flux that is used for stainless steel submerged arc overlay welding metal nitrogen alloying is characterized in that, comprises basic solder flux and adds flux component:
The chemical constituent of described basic solder flux and the percentage by weight that accounts for overall solder flux are:
CaF
2：20%—25％；
MgO：25%—30％；
Al
2O
3：20%—23％；
SiO
2：15%—20％；
CaCO
3：3%—7％；
Deoxidier: 3%-8%;
Described interpolation solder flux is the nitrogen containing metal compound.
2. a kind of sintered flux that is used for stainless steel submerged arc overlay welding metal nitrogen alloying according to claim 1 is characterized in that: described interpolation solder flux is that mass fraction is the nitrided ferro-chromium powder of 6%-15%.
3. a kind of sintered flux that is used for stainless steel submerged arc overlay welding metal nitrogen alloying according to claim 2 is characterized in that: described nitrided ferro-chromium powder particle size is the 10-60 order.
4. according to claim 2 or 3 described a kind of sintered fluxes that are used for stainless steel submerged arc overlay welding metal nitrogen alloying, it is characterized in that: described nitrided ferro-chromium powder nitrogen content is 3.0%-5.0%, and chrome content is more than or equal to 60%.
5. according to claim 1,2 or 3 described a kind of sintered fluxes that are used for stainless steel submerged arc overlay welding metal nitrogen alloying, it is characterized in that: described deoxidier is the silicomanganese double deoxidizer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101156297A CN102240871A (en) | 2011-05-05 | 2011-05-05 | Sintered flux for stainless steel submerged arc deposited metal nitrogen alloying |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101156297A CN102240871A (en) | 2011-05-05 | 2011-05-05 | Sintered flux for stainless steel submerged arc deposited metal nitrogen alloying |
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| CN102240871A true CN102240871A (en) | 2011-11-16 |
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| CN2011101156297A Pending CN102240871A (en) | 2011-05-05 | 2011-05-05 | Sintered flux for stainless steel submerged arc deposited metal nitrogen alloying |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104668816A (en) * | 2015-01-09 | 2015-06-03 | 天津重型装备工程研究有限公司 | Submerged-arc welding flux for low-alloy-steel narrow-gap welding and preparation method thereof |
| CN108788531A (en) * | 2018-09-03 | 2018-11-13 | 合肥久新不锈钢厨具有限公司 | One kind 400 is ferritic stainless steel activated rosin flux |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367161A (en) * | 2007-08-18 | 2009-02-18 | 中国船舶重工集团公司第七二五研究所 | Low-hydrogen super diphasic stainless steel electrode |
| CN101804525A (en) * | 2010-03-25 | 2010-08-18 | 河海大学常州校区 | Sintered flux for submerged arc welding of FCW with martensitic stainless steel hard surface |
| CN102019518A (en) * | 2010-12-31 | 2011-04-20 | 上海狮百盛焊材科技有限公司 | Two phase stainless steel welding rod |
-
2011
- 2011-05-05 CN CN2011101156297A patent/CN102240871A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367161A (en) * | 2007-08-18 | 2009-02-18 | 中国船舶重工集团公司第七二五研究所 | Low-hydrogen super diphasic stainless steel electrode |
| CN101804525A (en) * | 2010-03-25 | 2010-08-18 | 河海大学常州校区 | Sintered flux for submerged arc welding of FCW with martensitic stainless steel hard surface |
| CN102019518A (en) * | 2010-12-31 | 2011-04-20 | 上海狮百盛焊材科技有限公司 | Two phase stainless steel welding rod |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104668816A (en) * | 2015-01-09 | 2015-06-03 | 天津重型装备工程研究有限公司 | Submerged-arc welding flux for low-alloy-steel narrow-gap welding and preparation method thereof |
| CN104668816B (en) * | 2015-01-09 | 2017-01-11 | 天津重型装备工程研究有限公司 | Submerged-arc welding flux for low-alloy-steel narrow-gap welding and preparation method thereof |
| CN108788531A (en) * | 2018-09-03 | 2018-11-13 | 合肥久新不锈钢厨具有限公司 | One kind 400 is ferritic stainless steel activated rosin flux |
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Application publication date: 20111116 |