CN111215781A - Titanium steel composite plate and manufacturing method of corrosion hanging sheet of welding joint of titanium steel composite plate - Google Patents
Titanium steel composite plate and manufacturing method of corrosion hanging sheet of welding joint of titanium steel composite plate Download PDFInfo
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- CN111215781A CN111215781A CN202010127578.9A CN202010127578A CN111215781A CN 111215781 A CN111215781 A CN 111215781A CN 202010127578 A CN202010127578 A CN 202010127578A CN 111215781 A CN111215781 A CN 111215781A
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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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The invention belongs to the field of composite board application, and particularly relates to a titanium steel composite board and a manufacturing method of a corrosion coupon of a welding joint of the titanium steel composite board. By selecting two corrosion hanging pieces, the surface of the carbon steel base material is arranged on the inner side, and the surface of the titanium coating layer is arranged on the outer side; polishing by a physical tool and scrubbing a welding area by a chemical reagent; cutting and welding small strips of the titanium coating with double total thickness of the plate; high argon is used as protective gas during welding; the welding operation is completed within a prescribed time. The method effectively evaluates the corrosion resistance of the welding seams and the plates, and ensures the comprehensiveness and the accuracy of a titanium steel composite plate performance evaluation system.
Description
Technical Field
The invention belongs to the field of composite board application, and particularly relates to a titanium steel composite board and a manufacturing method of a corrosion coupon of a welding joint of the titanium steel composite board.
Background
The titanium steel composite board not only has good weldability, formability and thermal conductivity of carbon steel and better mechanical property, but also has excellent corrosion resistance of the titanium coating. Therefore, the method is widely applied to the industries of petroleum, chemical industry, metallurgy, light industry, salt chemical industry, power station auxiliary machinery, seawater desalination shipbuilding, electric power and the like.
At present, the titanium steel composite plate is welded by using a patch indirect welding method, namely two metals are separately welded and do not mutually melt. How to evaluate the corrosion performance of the welding joint of the titanium steel composite plate is not clearly specified, and the manufacture of the corrosion hanging piece of the welding joint is not clearly specified. If the traditional corrosion coupon is used for evaluation, namely, the titanium steel composite plate is processed into small blocks of 50mm multiplied by 100mm and is put into a corrosion environment, the titanium steel composite plate is a heterogeneous material, so that potential difference is easy to appear in the corrosion environment, corrosion is accelerated, and the corrosion performance of the titanium steel composite plate cannot be accurately evaluated. If only the corrosion performance of the titanium coating is considered, the titanium coating is stripped for corrosion coupon treatment, and the intercrystalline corrosion condition of the two metal materials is not considered.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a titanium steel composite plate and a manufacturing method of a corrosion coupon of a welding joint of the titanium steel composite plate. The method is adopted to determine the manufacturing process of the corrosion coupon of the workpiece under different welding conditions of the titanium steel composite plate, and make up for the imperfection and inaccuracy of the existing corrosion evaluation.
In order to achieve the purpose, the invention adopts the following technical scheme:
a titanium steel composite board and a manufacturing method of a corrosion coupon of a welding joint thereof specifically comprise the following steps:
1) selecting two corrosion hanging pieces, wherein the surface of the carbon steel base material is arranged on the inner side, and the surface of the titanium coating layer is arranged on the outer side;
2) polishing the welding area by using mechanical equipment or scrubbing by using a chemical agent;
3) cutting a small strip of titanium coating with double thickness of the corrosion hanging piece,
4) sealing and welding the two corrosion hanging pieces by using a small titanium coating strip;
5) high argon is used as protective gas during welding;
6) the welding operation is completed within a prescribed time.
The size of the corrosion hanging piece in the step 1) is 50 multiplied by 100 multiplied by Amm, and A is the total thickness of the plate.
And 2) the mechanical equipment is an aluminum oxide impeller, and the chemical reagent is acetone.
And 2) the polishing or scrubbing range is within 100mm of the two sides of the welding seam on the surface of the titanium coating.
The linear energy of the sealing welding process in the step 4) is not more than 20 KJ/cm.
And 5) the purity of the argon is not lower than 99.99%, and the gas flow is 10-14L/min.
Step 6) the prescribed time is 2 hours.
Compared with the prior art, the invention has the beneficial effects that:
because the composite plate is made of dissimilar metals, the composite plate cannot be directly exposed in a corrosive environment, a galvanic cell is formed, and the corrosion is accelerated, the composite plate has the advantage of the corrosion resistance of the titanium coating, and therefore the corrosion resistance of the titanium coating and a welding joint needs to be examined. According to the invention, the carbon steel substrate surfaces of the two composite plates are arranged on the inner side, the titanium coating surface is arranged on the outer side, and the sealing welding is carried out by adopting the small titanium strips which are consistent with the titanium coating material.
The method effectively evaluates the corrosion resistance of the welding seams and the plates, and ensures the comprehensiveness and the accuracy of a titanium steel composite plate performance evaluation system.
Drawings
FIG. 1 is a schematic view of a weld joint according to example 2 of the present invention;
fig. 2 is a schematic view of the structural member of embodiment 3 of the present invention.
Detailed Description
The following further illustrates embodiments of the invention, but is not intended to limit the scope thereof:
the titanium steel composite board and the method for manufacturing the corrosion coupon of the welding joint thereof have the advantages that the corrosion resistance of a titanium coating is required to be inspected, and the corrosion resistance of the titanium coating and the welding joint is required to be inspected, because the titanium steel composite board is connected by dissimilar metals, the titanium steel composite board cannot be directly exposed in a corrosion environment.
The method specifically comprises the following steps:
cutting into small pieces according to the size of a normal corrosion hanging piece (50 multiplied by 100 multiplied by Amm, A is the total thickness of the plate) or the size of a mechanical mechanism, selecting two pieces, and placing the surface of the carbon steel substrate on the inner side and the surface of the titanium coating on the outer side.
Polishing by using an alumina shutter wheel, and scrubbing 100mm ranges on two sides of the welding line on the surface of the titanium coating by using acetone. Cutting a small titanium coating strip with the thickness of 2A, sealing and welding under the protection of high-purity argon with the purity of not less than 99.99% and the gas flow of 10-14L/min by manual welding or automatic welding, wherein the welding position can be butt joint or fillet joint, the linear energy in the welding process is not more than 20KJ/cm, the welding is completed within 2h, the welding is not completed within 2h, and the welding is performed after re-polishing.
Before all titanium filler strip (backing plate) groups are welded, aluminum oxide shutter wheels are used for polishing within 100mm of the two sides of the welding line on the surface of the titanium coating, and the aluminum oxide shutter wheels are used for scrubbing the titanium coating completely by acetone, so that the surfaces of the two sides of the welding line are ensured to be clean before the backing plate and the cover plate are assembled.
All workers involved in welding or assisting in welding need to wear clean work clothes, wear clean cotton gloves or cowhide gloves of the welders, and the gloves are immediately replaced after being polluted by oil stains.
In the process of titanium cladding welding, in order to avoid oxidation, an argon protection dragging cover is used in the titanium material welding process, and a molten pool and a heat affected zone are ensured to be always under the argon protection.
The following examples are given to illustrate the specific embodiments of the present invention, and the following specific contents are as follows:
example 1:
the titanium steel composite plate with the thickness of 10mm (2mmTA2+8mmQ235) is cut into small blocks of 50 multiplied by 100 multiplied by 10mm, and two titanium strips of 20 multiplied by 100 multiplied by 2mm and 20 multiplied by 50 multiplied by 2mmTA2 are respectively cut. Before welding, an aluminum oxide shutter wheel is used for polishing, and the area to be welded and the titanium strips are scrubbed clean by acetone. TA2 titanium wire with a diameter of 2.5mm was selected.
The welding process parameters are as follows:
TABLE 1 welding process parameters table
Example 2:
a titanium steel composite plate with the thickness of 10mm (2mmTA2+8mmQ235) is welded according to a third groove type of the national standard GB/T13149-2009, a welding joint is as shown in figure 1, the welding joint is cut into small blocks of 50 multiplied by 100 multiplied by 10mm along the direction vertical to a welding line, and two titanium strips of 20 multiplied by 100 multiplied by 2mm and 20 multiplied by 50 multiplied by 2mmTA2 are respectively cut. Before welding, an aluminum oxide shutter wheel is used for polishing, and the area to be welded and the titanium strips are scrubbed clean by acetone. TA2 titanium wire with a diameter of 2.5mm was selected.
The welding process parameters are as follows:
TABLE 2 welding process parameters table
Example 3:
to examine the corrosion resistance of the structural member, 4 titanium steel composite plates of 50 × 100 × 10mm thickness were used, and butt-jointed and fillet-welded to the composite plates according to the structural member shown in fig. 2.
Before welding, an aluminum oxide shutter wheel is used for polishing, and the area to be welded and the titanium strips are scrubbed clean by acetone.
The welding process parameters are as follows:
TABLE 3 welding process parameters table
The method effectively evaluates the corrosion resistance of the welding seams and the plates, and ensures the comprehensiveness and the accuracy of a titanium steel composite plate performance evaluation system.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. A titanium steel composite plate and a manufacturing method of a corrosion coupon of a welding joint thereof are characterized by comprising the following steps:
1) selecting two corrosion hanging pieces, wherein the surface of the carbon steel base material is arranged on the inner side, and the surface of the titanium coating layer is arranged on the outer side;
2) polishing the welding area by using mechanical equipment or scrubbing by using a chemical agent;
3) cutting a small strip of titanium coating with double thickness of the corrosion hanging piece,
4) sealing and welding the two corrosion hanging pieces by using a small titanium coating strip;
5) high argon is used as protective gas during welding;
6) the welding operation is completed within a prescribed time.
2. The method for manufacturing the corrosion coupon of the titanium steel composite plate and the welding joint thereof according to claim 1, wherein the size of the corrosion coupon in the step 1) is 50 x 100 x Amm, and A is the total thickness of the plate.
3. The method for manufacturing the corrosion coupon of the titanium steel composite plate and the welding joint thereof according to claim 1, wherein the mechanical equipment in the step 2) is an aluminum oxide impeller, and the chemical reagent is acetone.
4. The method for manufacturing the corrosion coupon of the titanium steel composite plate and the welding joint thereof according to claim 1, wherein the polishing or scrubbing range of the step 2) is within 100mm of two sides of the welding seam on the surface of the titanium coating.
5. The method for manufacturing the corrosion coupon of the titanium steel composite plate and the welding joint thereof according to the claim 1, characterized in that the linear energy of the welding process of the sealing welding in the step 4) is not more than 20 KJ/cm.
6. The titanium steel composite plate and the manufacturing method of the corrosion coupon of the welded joint thereof according to claim 1, wherein the purity of argon in the step 5) is not lower than 99.99%, and the gas flow is 10-14L/min.
7. The method for manufacturing the corrosion coupon for the titanium steel composite plate and the welded joint thereof according to claim 1, wherein the specified time in the step 6) is 2 hours.
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| CN101428389A (en) * | 2008-11-21 | 2009-05-13 | 西安天力金属复合材料有限公司 | Method of manufacturing thin titanium/steel composite board |
| CN101992344A (en) * | 2010-11-11 | 2011-03-30 | 东北大学 | Preparation method of titanium-steel composite plate |
| CN102590069A (en) * | 2011-01-12 | 2012-07-18 | 宝山钢铁股份有限公司 | Test sample used in stainless steel corrosion test and fabrication method thereof |
| US20170164426A1 (en) * | 2000-08-17 | 2017-06-08 | Ati Properties Llc | Austenitic stainless steels including molybdenum |
| CN109532144A (en) * | 2018-11-29 | 2019-03-29 | 宝山钢铁股份有限公司 | A kind of super-duplex stainless steel clad steel plate and its manufacturing method |
| CN110539064A (en) * | 2019-09-06 | 2019-12-06 | 鞍钢股份有限公司 | vacuum electron beam welding method for titanium steel composite blank by adopting edge strip assembly |
| CN110681971A (en) * | 2019-09-30 | 2020-01-14 | 鞍钢股份有限公司 | Preparation method of rolled titanium-steel composite plate |
| CN110788135A (en) * | 2019-09-30 | 2020-02-14 | 鞍钢股份有限公司 | Composite blank manufacturing method for rolling titanium-steel composite plate |
-
2020
- 2020-02-28 CN CN202010127578.9A patent/CN111215781B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170164426A1 (en) * | 2000-08-17 | 2017-06-08 | Ati Properties Llc | Austenitic stainless steels including molybdenum |
| CN101428389A (en) * | 2008-11-21 | 2009-05-13 | 西安天力金属复合材料有限公司 | Method of manufacturing thin titanium/steel composite board |
| CN101992344A (en) * | 2010-11-11 | 2011-03-30 | 东北大学 | Preparation method of titanium-steel composite plate |
| CN102590069A (en) * | 2011-01-12 | 2012-07-18 | 宝山钢铁股份有限公司 | Test sample used in stainless steel corrosion test and fabrication method thereof |
| CN109532144A (en) * | 2018-11-29 | 2019-03-29 | 宝山钢铁股份有限公司 | A kind of super-duplex stainless steel clad steel plate and its manufacturing method |
| CN110539064A (en) * | 2019-09-06 | 2019-12-06 | 鞍钢股份有限公司 | vacuum electron beam welding method for titanium steel composite blank by adopting edge strip assembly |
| CN110681971A (en) * | 2019-09-30 | 2020-01-14 | 鞍钢股份有限公司 | Preparation method of rolled titanium-steel composite plate |
| CN110788135A (en) * | 2019-09-30 | 2020-02-14 | 鞍钢股份有限公司 | Composite blank manufacturing method for rolling titanium-steel composite plate |
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