CN202691563U - Titanium steel composite board - Google Patents
Titanium steel composite board Download PDFInfo
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- CN202691563U CN202691563U CN 201220222989 CN201220222989U CN202691563U CN 202691563 U CN202691563 U CN 202691563U CN 201220222989 CN201220222989 CN 201220222989 CN 201220222989 U CN201220222989 U CN 201220222989U CN 202691563 U CN202691563 U CN 202691563U
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Abstract
The utility model discloses a titanium steel composite board which is good in anti-corrosion property, good in weather-proof property, excellent in structure performance and long in service life. The titanium steel composite board comprises a weather-proof steel bottom board layer (10) and a titanium composite layer (20), wherein the titanium composite layer (20) is compounded on single board surface or two board surfaces of the weather-proof steel bottom board layer (10), the exposed surface of the weather-proof steel bottom board layer (10) is of an oxidization layer (40) of steel, the exposed surface of the titanium composite layer (20) is of an oxidization layer (30) of titanium, the titanium composite layer (20) and the weather-proof steel bottom board layer (10) are compounded as a whole through a thermal-state rolling process, and a composite interface between the titanium composite layer (20) and the weather-proof steel bottom board layer (10) is in metallic bond combination. The titanium steel composite board can be widely applied in the field of titanium steel composite boards.
Description
Technical field
The utility model relates to a kind of titanium steel composite board material.
Background technique
Along with the development of modern industry and science and technology, single metal or alloy has been difficult to satisfies modern production fully to the needs of material combination property, thus dissimilar metal with stratiform in conjunction with and the composite metal plate produced is subject to attention and the use of a plurality of industries.Composite metal plate is a kind of laminate metal material that utilizes complex technique that two or more the different sheet metal of physics, chemistry, mechanical property is prepared in the interface firm metallurgy combination of realization.Coating is selected the materials such as stainless steel, nickel, titanium, zirconium, copper, aluminium usually, and basic unit selects low carbon steel, structural steel, low alloy steel, container steel or the materials such as carbon steel and stainless steel forgings.Two kinds of sheet material interfaces reach metallurgy combination, have certain join strength, and the finished product composite sheet has kept certain technology capability after by heat treatment, can satisfy follow-up cold and hot working needs.Composite metal plate has the excellent performance such as anti-corrosion, but cheap, superior cost performance makes it be widely used in the industry-by-industries such as oil, chemical industry, electric power, metallurgy, salt manufacturing, alkaline, Aeronautics and Astronautics, machine-building, building.
Titanium is used for the fields such as space flight, navigation, chemical industry in a large number because of its good corrosion resistance, but that shortcoming is cost is higher, and this problem is particularly outstanding when particularly using as structure member, and effective solution is used titanium steel composite board exactly.Titanium steel composite board has had the history in more than 40 year since being born, titanium steel composite board has effectively utilized the good corrosion resistance of titanium and the intensity of steel, and importantly cost has also significantly descended, and has reached best of breed at cost.The manufacture method of existing Clad Steel Plate has: fill metal steel ingot rolling, blast composite algorithm, rolling crimping method, welding method etc.The occasion of titanium steel composite board is considered the characteristic of titanium, industrial normal employing blast composite algorithm or rolling crimping method (comprising heavy plate rolling method and continuously hot rolling method).The blast composite algorithm is normally carried out at normal temperatures, and rolling crimping method is with plate assembling, heating rolling.But the general thickness of titanium steel composite board material that adopts at present said method to make is larger, is difficult to realize the manufacturing of small size titanium steel composite board material.And be commonly the two-layer composite of one deck steel plate and one deck titanium plate, relatively poor at its weather resistance of steel plate layer segment, in the situation of ambient air Long Term Contact, oxygen in the atmosphere and moisture can produce rust corrosion to it, the corrosion meeting should affect its structural behaviour, make its life-span reduction, affect the weather resistance of whole composite board.
The model utility content
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, provides that a kind of corrosion resistance is good, weather resistance is good, structural behaviour is good, the titanium steel composite board material of long service life.
The first technological scheme that titanium steel composite board material of the present utility model adopts is: titanium steel composite board material of the present utility model comprises weathering steel backplane level, titanium composite bed, described titanium composite bed is compound on the single plate face of described weathering steel backplane level, the exposed surface of described weathering steel backplane level is the oxide layer of steel, the exposed surface of described titanium composite bed is the oxide layer of titanium, described titanium composite bed and described weathering steel backplane level are combined into by the hot operation of rolling and are integrated, and the compound interface of described titanium composite bed between described weathering steel backplane level is that metallic bond is combined.
The thickness of described titanium steel composite board material is 0.5～5.5mm, and the thickness of wherein said titanium composite bed is 0.1～0.5mm.
The oxide layer of described titanium surperficial transparent.
The oxide layer of described titanium has multicolour after by the light reflected refraction.
The oxide layer of described steel is taked to turn blue or blackening process.
The second technological scheme that titanium steel composite board material of the present utility model adopts is: titanium steel composite board material of the present utility model comprises weathering steel backplane level, titanium composite bed, described titanium composite bed is compound on two plate faces of described weathering steel backplane level, the exposed surface of described titanium composite bed is the oxide layer of titanium, described titanium composite bed and described weathering steel backplane level are combined into by the hot operation of rolling and are integrated, and the compound interface of described titanium composite bed between described weathering steel backplane level is that metallic bond is combined.
The thickness of described titanium steel composite board material is 0.5～5.5mm, and wherein the thickness of every layer of described titanium composite bed is 0.1～0.5mm.
The oxide layer of described titanium surperficial transparent.
The oxide layer of described titanium has multicolour after by the light reflected refraction.
The beneficial effects of the utility model are: because titanium steel composite board material of the present utility model comprises weathering steel backplane level, titanium composite bed, described titanium composite bed is compound on the single plate face or two plate faces of described weathering steel backplane level, the exposed surface of described titanium composite bed is the oxide layer of titanium, described titanium composite bed and described weathering steel backplane level are combined into by the hot operation of rolling and are integrated, and the compound interface of described titanium composite bed between described weathering steel backplane level is that metallic bond is combined; The utility model adopts the weathering steel backplane level as the basic unit of Clad Steel Plate, weathering steel contains the alloying element of some, as add P, Cu, Cr, Ni, Mo, in steel, under the uniform temperature condition, can strengthen its weather-resistant by the patina that forms self-protection at base metals, the rust corrosion of avoiding oxygen in the atmosphere and moisture to produce, adopting weathering steel to make the titanium steel composite board material is not have in the past, basic unit itself not only can be antirust, good weatherability, anticorrosive increasing the service life, and its price is lower, structural strength is good, can directly contact for a long time with ambient air, so that structure stability is guaranteed; In addition, the utility model adopts the titanium composite bed as coating, titanium is acid resistant alkali except gold, one of metal that weatherability is best, thereby be widely used as various chemical reaction containers, the material of heat exchanger, but it is higher that shortcoming is cost, this problem is particularly outstanding when particularly using as structure member, the utility model with titanium as clad material, its consumption is few, cost is lower, so that the corrosion resistance of the existing titanium of titanium steel composite board material of the present utility model, the structural strength of weathering steel is arranged again, so that cost significantly descends, so titanium steel composite board material corrosion resistance of the present utility model is good, weather resistance is good, structural behaviour is good, long service life;
Because the oxide layer of titanium described in the utility model is surperficial transparent, the oxide layer of described titanium has multicolour after by the light reflected refraction, the oxide layer of described titanium is as outer surface, under the irradiation of sunlight, have " rainbow effect " after light reflection and the refraction, presenting colorful decorative effect, is a kind of " dreamlike metal ", so titanium steel composite board material good decorative property of the present utility model.
Description of drawings
Fig. 1 is the local section structural representation of the utility model embodiment one titanium steel composite board material;
Fig. 2 is the structural representation of the symmetrical closed state of hot rolling header board material after the pretreatment in the utility model embodiment one the manufacture process of titanium steel composite board material;
Fig. 3 is the local section structural representation of the utility model embodiment two titanium steel composite board material;
Fig. 4 is the structural representation of the symmetrical closed state of hot rolling header board material after the pretreatment in the utility model embodiment two the manufacture process of titanium steel composite board material.
Embodiment
Embodiment one:
Such as Fig. 1, shown in Figure 2, the titanium steel composite board material of present embodiment is a kind of two-layer compound sheet material, its cross-sectional configuration comprises weathering steel backplane level 10, titanium composite bed 20, the plate face that described titanium composite bed 20 is compound in described weathering steel backplane level 10 is on the single face, the exposed surface of described titanium composite bed 20 is the oxide layer 30 of titanium, the oxide layer 30 of described titanium surperficial transparent, be used for having on the structural material ornamental, the exposed surface of described weathering steel backplane level 10 is the oxide layer 40 of steel, the oxide layer 40 of described steel can be taked to turn blue or blackening process, so that the weather resistance of oxide layer is stronger, the weatherability of whole sheet material is more stable, described titanium composite bed 20 is combined into by the hot operation of rolling with described weathering steel backplane level 10 and is integrated, the compound interface of described titanium composite bed 20 between described weathering steel backplane level 10 is that metallic bond is combined, the thickness of described titanium steel composite board material is 3mm, the thickness of wherein said titanium composite bed 20 is 0.1mm, the thickness of described titanium composite bed 20 only accounts for the thickness 1/30 of whole titanium steel composite board material, therefore, the cost increase of precious metal titanium is not high, the thickness range of described titanium steel composite board material can be 0.5～5.5mm, and the thickness of wherein said titanium composite bed 20 is 0.1～0.5mm.
The manufacture method of the titanium steel composite board material of present embodiment may further comprise the steps:
(a) get the raw materials ready: prepare respectively identical weather-resistant steel plate 1 and two block lengths, width and thickness size specification identical titanium plate 2 respectively of two block lengths, width and thickness size specification, the length of described weather-resistant steel plate 1 and width be respectively greater than length and the width of described titanium plate 2, and the difference of length and the difference of width are all more than or equal to 2 times of the thickness H of described titanium plate 2;
(b) interface processing: at first, be that non-binding plate face carries out passivation to each plate faces of two described weather-resistant steel plates 1 and two blocks of described titanium plates 2, to form surface passivation layer; Then, the board face for the treatment of of two described weather-resistant steel plates 1 and two blocks of described titanium plates 2 is carried out surface activation treatment, can adopt the method for Shot Blasting, to remove its surface oxide layer;
(c) assembly: respectively with the plate face after described weather-resistant steel plate 1 and the 2 activated processing of described titanium plate in twos to being close together, edge to the described weather-resistant steel plate 1 that is close together exceeds the size Δ at described titanium plate 2 edges more than or equal to the thickness H of described titanium plate 2, purpose is in course of hot rolling, so that exceeding the part at described titanium plate 2 edges, the edge of described weather-resistant steel plate 1 side of described titanium plate 2 all can be coated, the edge section that prevents described titanium plate 2 is exposed and is caused temperature to reduce too fast and be lower than the temperature of its main body, causes the edge section of described titanium plate 2 not reach metallic bond with described weather-resistant steel plate 1 and is combined temperature and produces cracking; Again two blocks of described titanium plates 2 are faced through the plate of surface passivating treatment and be close together, form two described weather-resistant steel plates 1 and be positioned at skin and two symmetrical closed states of four laminate material that described titanium plate 2 is positioned at internal layer, the symmetry status of this plate is so that stress equalization, can avoid in course of hot rolling that unbalanced stress brings in conjunction with unstable drawback, so that two composite board mechanical property high conformities of simultaneously moulding; To selectively scribbling brazing flux 5 between the plate face after the activated processing of the described weather-resistant steel plate 1 that is close together and institute's titanium plate 2, being beneficial to described weather-resistant steel plate 1 is combined more firm stable with metallic bond between the institute titanium plate 2, to two blocks of described titanium plates 2 being close together between the plate face of surface passivating treatment, scribble release agent 6 so that the separation at the interface after the hot rolling;
(d) weld: after discharging as much as possible in connection with the air between the interface with press machine, be welded and fixed to the described weather-resistant steel plate 1 that is close together and described titanium plate 2 and to the plate face edge between two blocks of described titanium plates 2 that are close together adjacent again, the mode that can take between adjacent described weather-resistant steel plate 1 and described titanium plate 2 and two blocks of described titanium plates 2 advanced spot welding again seam crossing to be carried out soldering and sealing is processed, after this step the configuration state of plate as shown in Figure 3, solder joint 7 is the solder joint of spot welding;
(e) heating: the above-mentioned four laminate material that are fixed together are heated, make its temperature evenly reach 750～900 ℃ of high temperature, to satisfy the temperature of bi-material metallic bond combination;
(f) hot rolling: adopt Hot Rolling Process For High Temperature Alloy Plate machine or steckel mill that above-mentioned four laminate material after heating are carried out the multi-pass hot rolling, make its overall reduction 〉=70%, so that the surface of the surface of the described weather-resistant steel plate 1 after the activated processing and described titanium plate 2 forms the mechanical thermal pressing; After plate whenever carried out 3～4 passage hot rollings, plate is returned stove be heated to 750～900 ℃ and be incubated 30～90 minutes, to guarantee the temperature of its metallic bond combination, realize its joint effect, crystallization-stable; Plate is carried out 8～12 passage hot rollings altogether, wherein has the rolling reduction of a time 〉=40% at least, namely after this passage hot rolling the total thickness of plate reduce before than hot rolling 40% and more than, flow to impel two kinds of plate generation plastic deformations, merge at the interface that is conducive to the two;
(g) heat diffusion treatment: the plate after the hot rolling is carried out homogenizing process, so that mechanical thermal pressing interface reaches the thermodiffusion seam;
(h) finishing: with the edge excision of plate, remove the part of welding in the step (d), the plate face separation through surface passivating treatment with two blocks of described titanium plates 2 forms two blocks of titanium steel composite board materials.
Certainly, can comprise also after described step (h) that according to actual needs step (i) is cold rolling, namely the titanium steel composite board material be carried out cold rolling moulding, to make the various templates of actual demand.
Embodiment two:
Such as Fig. 3, shown in Figure 4, the titanium steel composite board material of present embodiment is a kind of three-layer composite board material, its cross-sectional configuration comprises weathering steel backplane level 10, titanium composite bed 20, two plate faces that described titanium composite bed 20 is compound in described weathering steel backplane level 10 be two-sided on, the exposed surface of described titanium composite bed 20 is the oxide layer 30 of titanium, described titanium composite bed 20 is combined into by the hot operation of rolling with described weathering steel backplane level 10 and is integrated, the compound interface of described titanium composite bed 20 between described weathering steel backplane level 10 is that metallic bond is combined, the thickness of described titanium steel composite board material is 5.5mm, wherein the thickness of every layer of described titanium composite bed 20 is 0.2mm, the thickness range of described titanium steel composite board material can be 0.5～5.5mm, and wherein the thickness of every layer of described titanium composite bed 20 is 0.1～0.5mm.
The manufacture method of the titanium steel composite board material of present embodiment may further comprise the steps:
(a) get the raw materials ready: prepare respectively identical weather-resistant steel plate 1 and four block lengths, width and thickness size specification identical titanium plate 2 respectively of three block lengths, width and thickness size specification, the length of described weather-resistant steel plate 1 and width be respectively greater than length and the width of described titanium plate 2, and the difference of length and the difference of width are all more than or equal to 2 times of the thickness H of described titanium plate 2;
(b) interface processing: at first, be that non-binding plate face carries out passivation to each plate faces of two described weather-resistant steel plates 1 and four blocks of described titanium plates 2, to form surface passivation layer; Then, the board face for the treatment of to three described weather-resistant steel plates 1 and four blocks of described titanium plates 2 carries out surface activation treatment, and wherein the 3rd described weather-resistant steel plate 1 carries out two-sided activation process, and all the other plates all are single face activation process, specifically can adopt the method for Shot Blasting, to remove its surface oxide layer;
(c) assembly: respectively with the plate face after the activated processing of the plate face after the activated processing of two described weather-resistant steel plates 1 after the single face activation process and two blocks of described titanium plates 2 in twos to being close together, form two two sections, two sections are the blanks that finally form two-layer compound sheet material; And with the plate face after the activated processing of two plate faces of the 3rd described weather-resistant steel plate 1 after the two-sided activation process and other two blocks of described titanium plates 2 respectively to being close together, form three sections, three sections are the blanks that finally form the three-layer composite board material; Again described three are deployed in the centre, two other described two sections are respectively to being against the both sides of described three sections, make four described titanium plates 2 through the plate face of surface passivating treatment respectively in twos to being close together, form three described weather-resistant steel plates 1 and lay respectively at the symmetrical closed state of seven laminate material that skin and centre and adjacent described weather-resistant steel plate 1 among accompany two blocks of described titanium plates 2, the symmetry status of this plate is so that stress equalization, can avoid in course of hot rolling that unbalanced stress brings in conjunction with unstable drawback, so that the composite board mechanical property high conformity of simultaneously moulding; Edge to the described weather-resistant steel plate 1 that is close together exceeds the size Δ at described titanium plate 2 edges more than or equal to the thickness H of described titanium plate 2, purpose is in course of hot rolling, so that exceeding the part at described titanium plate 2 edges, the edge of described weather-resistant steel plate 1 side of described titanium plate 2 all can be coated, the edge section that prevents described titanium plate 2 is exposed and is caused temperature to reduce too fast and be lower than the temperature of its main body, causes the edge section of described titanium plate 2 not reach metallic bond with described weather-resistant steel plate 1 and is combined temperature and produces cracking; To selectively scribbling brazing flux 5 between the plate face after the activated processing of the described weather-resistant steel plate 1 that is close together and institute's titanium plate 2, being beneficial to described weather-resistant steel plate 1 is combined more firm stable with metallic bond between the institute titanium plate 2, to two blocks of described titanium plates 2 being close together between the plate face of surface passivating treatment, scribble release agent 6 so that the separation at the interface after the hot rolling;
(d) weld: after discharging as much as possible in connection with the air between the interface with press machine, be welded and fixed to the described weather-resistant steel plate 1 that is close together and described titanium plate 2 and to the plate face edge between two blocks of described titanium plates 2 that are close together adjacent again, the mode that can take between adjacent described weather-resistant steel plate 1 and described titanium plate 2 and two blocks of described titanium plates 2 advanced spot welding again seam crossing to be carried out soldering and sealing is processed, after this step the configuration state of plate as shown in Figure 4, solder joint 7 is the solder joint of spot welding;
(e) heating: the above-mentioned seven laminate material that are fixed together are heated, make its temperature evenly reach 750～900 ℃ of high temperature, to satisfy the temperature of bi-material molecular chain combination;
(f) hot rolling: adopt Hot Rolling Process For High Temperature Alloy Plate machine or steckel mill that above-mentioned seven laminate material after heating are carried out the multi-pass hot rolling, overall reduction 〉=70% makes the surface of the described weather-resistant steel plate 1 after the activated processing and the surface formation mechanical thermal pressing of described titanium plate 2; After plate whenever carried out 3～4 passage hot rollings, plate is returned stove be heated to 750～900 ℃ and be incubated 30～90 minutes, to guarantee the temperature of its metallic bond combination, realize its joint effect, crystallization-stable; Plate is carried out 8～12 passage hot rollings altogether, wherein has the rolling reduction of a time 〉=40% at least, namely after this passage hot rolling the total thickness of plate reduce before than hot rolling 40% and more than, flow to impel two kinds of plate generation plastic deformations, merge at the interface that is conducive to the two
(g) heat diffusion treatment: the plate after the hot rolling is carried out homogenizing process, make mechanical thermal pressing interface reach the thermodiffusion seam;
(h) finishing: with the edge excision of plate, remove the part of welding in the step (d), described three sections and two described two sections are separated respectively the plate face through surface passivating treatment by the described titanium plate 2 at place, form two Double-layer titanium plastics composite plates and three layers of titanium steel composite board material.
Certainly, can comprise also after described step (h) that according to actual needs step (i) is cold rolling, namely the titanium steel composite board material be carried out cold rolling moulding, to make the various templates of actual demand.
A kind of corrosion resistance of titanium steel composite board material of the present utility model is good, weather resistance is good, structural behaviour is good, the titanium steel composite board material of long service life.The titanium steel composite board material thickness that adopts the manufacture method of titanium steel composite board material of the present utility model to make can be accomplished very thin, satisfies the actual demand of using for thin plate, can also save metallic material, has solved the manufacturing difficult problem of little thickness size titanium steel composite board material.No matter be the two-layer composite of one deck steel plate and one deck titanium plate or the three-layer composite structure of one deck steel plate and Double-layer titanium plate, all solved the poor difficult problem of steel plate layer segment weather resistance of common titanium steel composite board, even in the situation of ambient air Long Term Contact, can not get rusty by corrosion yet, having guaranteed the plywood sheet structure performance and used life, is a kind of more long-acting weather-proof composite board.
The utility model can be widely used in titanium steel composite board material field.
Claims (7)
1. titanium steel composite board material, it is characterized in that: comprise weathering steel backplane level (10), titanium composite bed (20), described titanium composite bed (20) is compound on the single plate face of described weathering steel backplane level (10), the exposed surface of described weathering steel backplane level (10) is the oxide layer (40) of steel, the exposed surface of described titanium composite bed (20) is the oxide layer (30) of titanium, described titanium composite bed (20) is combined into by the hot operation of rolling with described weathering steel backplane level (10) and is integrated, and the compound interface of described titanium composite bed (20) between described weathering steel backplane level (10) is that metallic bond is combined.
2. titanium steel composite board material according to claim 1, it is characterized in that: the thickness of described titanium steel composite board material is 0.5～5.5mm, the thickness of wherein said titanium composite bed (20) is 0.1～0.5mm.
3. titanium steel composite board material according to claim 1 is characterized in that: the oxide layer of described titanium (30) surperficial transparent.
4. titanium steel composite board material according to claim 1, it is characterized in that: the oxide layer of described steel (40) is taked to turn blue or blackening process.
5. titanium steel composite board material, it is characterized in that: comprise weathering steel backplane level (10), titanium composite bed (20), described titanium composite bed (20) is compound on two plate faces of described weathering steel backplane level (10), the exposed surface of described titanium composite bed (20) is the oxide layer (30) of titanium, described titanium composite bed (20) is combined into by the hot operation of rolling with described weathering steel backplane level (10) and is integrated, and the compound interface of described titanium composite bed (20) between described weathering steel backplane level (10) is that metallic bond is combined.
6. titanium steel composite board material according to claim 5, it is characterized in that: the thickness of described titanium steel composite board material is 0.5～5.5mm, wherein the thickness of every layer of described titanium composite bed (20) is 0.1～0.5mm.
7. titanium steel composite board material according to claim 5 is characterized in that: the oxide layer of described titanium (30) surperficial transparent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201220222989 CN202691563U (en) | 2012-05-17 | 2012-05-17 | Titanium steel composite board |
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| CN 201220222989 CN202691563U (en) | 2012-05-17 | 2012-05-17 | Titanium steel composite board |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102679134A (en) * | 2012-05-17 | 2012-09-19 | 国际辊轧成型学会有限公司 | Titanium steel composite slab and manufacturing method thereof |
| CN112705570A (en) * | 2020-12-11 | 2021-04-27 | 沈州 | Method for manufacturing titanium steel composite board and titanium steel liner cup |
-
2012
- 2012-05-17 CN CN 201220222989 patent/CN202691563U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102679134A (en) * | 2012-05-17 | 2012-09-19 | 国际辊轧成型学会有限公司 | Titanium steel composite slab and manufacturing method thereof |
| CN102679134B (en) * | 2012-05-17 | 2015-04-01 | 国际辊轧成型学会有限公司 | Titanium steel composite slab and manufacturing method thereof |
| CN112705570A (en) * | 2020-12-11 | 2021-04-27 | 沈州 | Method for manufacturing titanium steel composite board and titanium steel liner cup |
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Address after: Room 1318-20, Hollywood business centre, 610 Nathan Road, Mong Kok, Kowloon, Hongkong, China Patentee after: International Institute of Rollforming Limited Address before: Room 1318-20, Hollywood business centre, 610 Nathan Road, Mong Kok, Kowloon, Hongkong, China Patentee before: International Academy of Rolling Forming Co., Ltd. |
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Effective date of registration: 20200514 Address after: Room 1516, 15 / F, Central Plaza, Tuen Mun, 22 Hai Rong Road, Tuen Mun, New Territories, Hong Kong, China Patentee after: Baianli Steel Structure Application Science & Technology Co.,Ltd. Address before: Room 1318-20, Hollywood business centre, 610 Nathan Road, Mong Kok, Kowloon, Hongkong, China Patentee before: International Institute of Rollforming Ltd. |
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Effective date of registration: 20200623 Address after: No. 49, No. 1708, building 30, Xueyuan Road, Beijing, Haidian District Patentee after: Han Jingtao Address before: Room 1516, 15 / F, Central Plaza, Tuen Mun, 22 Hai Rong Road, Tuen Mun, New Territories, Hong Kong, China Patentee before: Baianli Steel Structure Application Science & Technology Co.,Ltd. |
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