CN110790569A - Welding ceramic liner capable of preventing weld cracks and preparation method thereof - Google Patents
Welding ceramic liner capable of preventing weld cracks and preparation method thereof Download PDFInfo
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- CN110790569A CN110790569A CN201911077118.3A CN201911077118A CN110790569A CN 110790569 A CN110790569 A CN 110790569A CN 201911077118 A CN201911077118 A CN 201911077118A CN 110790569 A CN110790569 A CN 110790569A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
- C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
- C04B35/19—Alkali metal aluminosilicates, e.g. spodumene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/035—Seam welding; Backing means; Inserts with backing means disposed under the seam
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3232—Titanium oxides or titanates, e.g. rutile or anatase
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/444—Halide containing anions, e.g. bromide, iodate, chlorite
- C04B2235/445—Fluoride containing anions, e.g. fluosilicate
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention discloses a welding ceramic liner capable of preventing weld cracks and a preparation method thereof, wherein the welding ceramic liner comprises the following raw materials in parts by weight: 10-16 parts of calcium fluoride, 15-30 parts of rutile, 40-60 parts of potassium feldspar, 8-15 parts of fluorite and 15-25 parts of alumina. The ceramic liner for welding improves the fluidity of the molten metal, so that the deposited metal has good crack prevention capability, and the transition of Si in the deposited metal is reduced, so that the probability of generating cracks of welding seams is greatly reduced.
Description
Technical Field
The invention relates to the technical field of welding materials, in particular to a welding ceramic liner capable of preventing weld cracks and a preparation method thereof.
Background
With the rapid development of the marine industry, the construction of the ultra-large container ship not only brings huge opportunities and challenges to the expansion of the international market, environmental protection, port construction and other aspects, but also brings challenges to shipbuilding materials. Therefore, the container transport ship body generally adopts high-strength and high-toughness and large-thickness steel plates. The steel plate with high strength, toughness and large thickness meets the performance requirement, and simultaneously, the stress state of the steel plate is converted from a plane stress state to a plane strain state, so that the anti-cracking performance of the material is reduced. The brittle fracture of the material leads to a plurality of accidents of a large container ship. When the component has potential defects or cracks, the welding seam with good crack arrest performance can stop the crack from expanding in a small range under the action of dynamic load and impact load, and major accidents are prevented.
In the face of the existing foreign patent technology barriers, China iron and steel enterprises develop a series of technical challenges for the crack arrest steel plate for the ultra-large container ship, and the steel plate with high strength and toughness, low yield ratio, high crack arrest performance and easy weldability is obtained through multiphase structure ratio regulation. The China crack arrest steel is successfully applied to the construction of domestic ultra-large container ships, the demand for the marine crack arrest steel is further increased in the future, and the performance requirements are continuously improved. Although domestic iron and steel enterprises have successfully developed the products, the novel crack-stopping steel material has extremely strict requirements on welding environment and process, and high process difficulty, so that the welding material (including ceramic liner for welding) matched with the novel crack-stopping steel material also mainly depends on imported products, and the performance level of the welding material produced in China is also different from the international top level. Therefore, new materials for welding need to be developed to meet the crack prevention performance of welding deposited metal and match with crack-stopping steel for large-sized container ships.
Disclosure of Invention
In view of the above-described drawbacks of the prior art, an object of the present invention is to provide a ceramic liner for welding that prevents weld cracks and a method for manufacturing the same. The ceramic liner for welding can prevent the flux-cored welding wire from generating cracks during welding, particularly arc closing, thereby improving the quality and the efficiency of welding seams.
In order to achieve the above objects or other objects, the present invention is achieved by the following technical solutions:
a ceramic liner for welding for preventing weld cracks comprises the following raw materials in parts by weight: 10-16 parts of calcium fluoride, 15-30 parts of rutile, 40-60 parts of potassium feldspar, 8-15 parts of fluorite and 15-25 parts of alumina.
Further, sodium type water glass is also included.
Furthermore, the dosage of the sodium type water glass is 20 percent of the total amount of the five raw materials of calcium fluoride, rutile, potash feldspar, fluorite and alumina.
Further, the sodium type water glass is selected from Na2SiO3·9H2O。
Further, the ceramic liner SiO for welding2The content is 25-35%.
A method for preparing the ceramic gasket for welding comprises the following steps:
(1) mixing calcium fluoride, rutile, potash feldspar, fluorite and alumina in certain weight proportion;
(2) adding sodium type water glass into the step (1), uniformly stirring, placing into a mold, and compacting;
(3) and (5) drying the mold at a high temperature, discharging, and carrying out vacuum packaging.
Further, the drying temperature in the step (3) is 1100-.
The ceramic liner provided by the invention has the advantages that the adopted raw materials are slightly alkaline, the ceramic liner has strong deoxidation and desulfurization effects, the silicon content is reduced in the selection of the materials, the S, P content in deposited metal is reduced when the ceramic liner is used for flux-cored wire welding, and the fluidity of molten metal is improved, so that the deposited metal has good crack prevention capability, and the transition of Si in the deposited metal is also reduced, so that the probability of weld cracks is greatly reduced. Therefore, the welding of the main body structure of the large ship body can be met, and the problem that cracks are easy to generate and cannot be solved by common welding materials is solved.
In the formula of the ceramic liner at the present stage, quartz sand is generally used as a main raw material, and the formula comprises the following components: quartz sand, reduced titanium, fluorite and alumina. Calcium fluoride and rutile are added into the ceramic liner for welding to improve the alkalinity of the ceramic liner, so that the alkalinity of the ceramic liner for welding is over 1.6; with SiO-containing layers2Less potassium feldspar to replace quartzLess silicon content in ceramic liner, and SiO in ceramic liner for welding2The content is about 30 percent, and the ceramic liner SiO used at present2The content is about 60 percent; as the silicon content of the ceramic liner increases, the transition of deposited metal silicon elements also increases, so that the probability of causing weld cracks also greatly increases. The ceramic liner can prevent cracks from being generated when the cored wire receives arc welding, thereby improving the welding seam quality and the welding efficiency.
Detailed Description
The following description of the embodiments of the present invention is provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
Example 1
A ceramic liner for welding for preventing weld cracking, comprising: 10 parts of calcium fluoride, 15 parts of rutile, 40 parts of potassium feldspar, 8 parts of fluorite, 15 parts of alumina and sodium type water glass (Na2SiO3 & 9H2O) accounting for 20 percent of the total amount of the raw materials.
The preparation method comprises the following steps: (1) will: respectively weighing 10 parts of calcium fluoride, 15 parts of rutile, 40 parts of potassium feldspar, 8 parts of fluorite and 15 parts of alumina, mixing and fully stirring for later use;
(2) adding sodium type water glass according to 20% of the total amount of the prepared powder, fully and uniformly stirring, placing into a mould, and compacting;
(3) drying the mold at high temperature of 1100 deg.C for 10h or longer to obtain SiO in the ceramic liner2The content is 30%.
The ceramic liner manufactured by the method is welded by adopting the ceramic liner process by adopting different voltages/currents of 20V/165A, 22V/180A, 24V/200A and 26V/220A respectively, and the X-ray flaw detection shows that the welding seam welded by the ceramic liner manufactured by the embodiment has no cracks.
Example 2
A ceramic liner for welding for preventing weld cracking, comprising: 12 parts of calcium fluoride, 30 parts of rutile, 60 parts of potassium feldspar, 15 parts of fluorite, 28 parts of alumina and sodium type water glass accounting for 20 percent of the total amount of the raw materials.
The preparation method comprises the following steps:
(1) respectively weighing calcium fluoride, rutile, potash feldspar, fluorite and alumina, mixing and fully stirring for later use;
(2) adding sodium type water glass according to 20% of the total amount of the prepared powder, fully and uniformly stirring, placing into a mould, and compacting;
(3) drying the mold at 1250 deg.C for 10h to obtain SiO in the ceramic liner2The content was 32%.
The ceramic liner manufactured by the method is welded by adopting the ceramic liner process by adopting different voltages/currents of 20V/165A, 22V/180A, 24V/200A and 26V/220A respectively, and the X-ray flaw detection shows that the welding seam welded by the ceramic liner manufactured by the embodiment has no cracks.
Example 3
A ceramic liner for welding for preventing weld cracking, comprising: 16 parts of calcium fluoride, 20 parts of rutile, 45 parts of potassium feldspar, 10 parts of fluorite, 20 parts of alumina and sodium type water glass accounting for 20 percent of the total amount of the raw materials.
The preparation method comprises the following steps:
(1) respectively weighing calcium fluoride, rutile, potash feldspar, fluorite and alumina, mixing and fully stirring for later use;
(2) adding sodium type water glass according to 20% of the total amount of the prepared powder, fully and uniformly stirring, placing into a mould, and compacting;
(3) drying the die at high temperature of 1200 deg.C for not less than 10h to obtain SiO in the ceramic liner2The content was 31.5%.
The ceramic liner manufactured by the method is welded by adopting the ceramic liner process by adopting different voltages/currents of 20V/165A, 22V/180A, 24V/200A and 26V/220A respectively, and the X-ray flaw detection shows that the welding seam welded by the ceramic liner manufactured by the embodiment has no cracks.
Example 4
A ceramic liner for welding for preventing weld cracking, comprising: 16 parts of calcium fluoride, 25 parts of rutile, 50 parts of potassium feldspar, 9 parts of fluorite, 23 parts of alumina and sodium type water glass accounting for 20 percent of the total amount of the raw materials.
The preparation method comprises the following steps:
(1) respectively weighing calcium fluoride, rutile, potash feldspar, fluorite and alumina, mixing and fully stirring for later use;
(2) adding sodium type water glass according to 20% of the total amount of the prepared powder, fully and uniformly stirring, placing into a mould, and compacting;
(3) drying the mold at 1150 deg.C for 10h or longer to obtain SiO in the ceramic liner2The content is 30%.
The ceramic liner manufactured by the method is welded by adopting the ceramic liner process by adopting different voltages/currents of 20V/165A, 22V/180A, 24V/200A and 26V/220A respectively, and the X-ray flaw detection shows that the welding seam welded by the ceramic liner manufactured by the embodiment has no cracks.
Comparative example
The traditional ceramic liner formulation is adopted: 10 parts of quartz sand, 20 parts of reduced titanium, 8 parts of fluorite and 15 parts of alumina, and the ceramic liner is prepared by combining the prior art, wherein SiO in the obtained ceramic liner2The content is 60%. The ceramic liner is welded under the conditions of welding voltage of 26V and current of 220A, and arc-extinguishing cracks are found by naked eyes after welding.
In a word, the ceramic liner prepared by the invention adopts a new formula, so that the alkalinity of the prepared ceramic liner is more than 1.6, and SiO is2The content is 25-35%, the fluidity of the molten metal is improved, so that the deposited metal has good crack prevention capability, and the transition of Si in the deposited metal is reduced, so that the probability of generating cracks of welding seams is greatly reduced.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (7)
1. The ceramic liner for welding for preventing the cracks of the welding seams is characterized by comprising the following raw materials in parts by weight: 10-16 parts of calcium fluoride, 15-30 parts of rutile, 40-60 parts of potassium feldspar, 8-15 parts of fluorite and 15-25 parts of alumina.
2. A ceramic backing for welding as set forth in claim 1, further comprising sodium water glass.
3. The ceramic backing for welding according to claim 2, wherein said sodium-type water glass is used in an amount of 20% of the total amount of the four raw materials of calcium fluoride, rutile, potash feldspar, fluorite and alumina.
4. The ceramic backing for welding according to claim 2, wherein said sodium water glass is selected from Na2SiO3·9H2O。
5. The ceramic gasket for welding according to claim 2, wherein the ceramic gasket for welding is SiO2The content is 25-35%.
6. A method of preparing a ceramic pad for welding according to any one of claims 2 to 5, comprising the steps of:
(1) mixing calcium fluoride, rutile, potash feldspar, fluorite and alumina in certain weight proportion;
(2) adding sodium type water glass into the step (1), uniformly stirring, placing into a mold, and compacting;
(3) and (5) drying the mold at a high temperature, discharging, and carrying out vacuum packaging.
7. The method as claimed in claim 6, wherein the drying temperature in step (3) is 1100-1250 ℃ and the drying time is not less than 12 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911077118.3A CN110790569A (en) | 2019-11-06 | 2019-11-06 | Welding ceramic liner capable of preventing weld cracks and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911077118.3A CN110790569A (en) | 2019-11-06 | 2019-11-06 | Welding ceramic liner capable of preventing weld cracks and preparation method thereof |
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| CN110790569A true CN110790569A (en) | 2020-02-14 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1135131A (en) * | 1965-01-05 | 1968-11-27 | Union Carbide Corp | Low silica welding composition |
| JPH08132292A (en) * | 1994-11-10 | 1996-05-28 | Yoshihiro Ogasawara | Backing member for welding reinforcing bar |
| CN103878504A (en) * | 2014-03-20 | 2014-06-25 | 象山焊接衬垫厂 | Low-temperature steel CO2 one-side welding liner block |
| KR20170035160A (en) * | 2015-09-22 | 2017-03-30 | 정무수 | Ceramic Backing Material for Electro Gas Welding and Welding Supporting Apparatus having The Same |
| CN106624456A (en) * | 2016-11-29 | 2017-05-10 | 武汉铁锚焊接材料股份有限公司 | Backing welding agent special for FCB method three-wire submerged arc welding and preparing method thereof |
-
2019
- 2019-11-06 CN CN201911077118.3A patent/CN110790569A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1135131A (en) * | 1965-01-05 | 1968-11-27 | Union Carbide Corp | Low silica welding composition |
| JPH08132292A (en) * | 1994-11-10 | 1996-05-28 | Yoshihiro Ogasawara | Backing member for welding reinforcing bar |
| CN103878504A (en) * | 2014-03-20 | 2014-06-25 | 象山焊接衬垫厂 | Low-temperature steel CO2 one-side welding liner block |
| KR20170035160A (en) * | 2015-09-22 | 2017-03-30 | 정무수 | Ceramic Backing Material for Electro Gas Welding and Welding Supporting Apparatus having The Same |
| CN106624456A (en) * | 2016-11-29 | 2017-05-10 | 武汉铁锚焊接材料股份有限公司 | Backing welding agent special for FCB method three-wire submerged arc welding and preparing method thereof |
Non-Patent Citations (5)
| Title |
|---|
| TIAGO F. A. SANTOS ET. AL: "Development of ceramic backing for friction stir welding and processing", 《WELDING INTERNATIONAL》 * |
| 材料科学技术百科全书编辑委员会编: "《材料科学技术百科全书》", 31 August 1995, 中国大百科全书出版社 * |
| 河北工学院金工教研室: "《电气工程中铝铜焊接技术》", 31 August 1978, 机械工业出版社 * |
| 蒋晓青等: "C02单面焊陶瓷衬垫的试验研究", 《热加工工艺》 * |
| 郝建军等: "《熔焊基础与金属材料焊接》", 31 October 2010, 北京理工大学出版社 * |
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Application publication date: 20200214 |