CN106271414A - A kind of preparation method of TMCP type bridge stainless steel clad plate - Google Patents
A kind of preparation method of TMCP type bridge stainless steel clad plate Download PDFInfo
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- CN106271414A CN106271414A CN201610706997.1A CN201610706997A CN106271414A CN 106271414 A CN106271414 A CN 106271414A CN 201610706997 A CN201610706997 A CN 201610706997A CN 106271414 A CN106271414 A CN 106271414A
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Abstract
The present invention is the preparation method of a kind of TMCP type bridge stainless steel clad plate, is chosen by blank, surface process, interleaving agent brushing, assembly, electron beam soldering and sealing, heats, rolls, aligns and cut the steps such as point plate and prepare the bridge stainless steel clad plate of good metallurgical binding.The present invention uses the direct soldering and sealing of electron beam under vacuum chamber environment, decreases the operations such as the boring of traditional handicraft, evacuation, and vacuum is more secure.By TMCP technique, it is ensured that the mechanical property that base material bridge steel is good, the quick cooling after rolling, the intergranular controlling to cover material separates out, it is ensured that cover material good corrosion resistance；Base material uses low-carbon (LC) design blank, and prepared composite plate, base material carbon equivalent is low, and welding performance is good, it is simple to site operation；It addition, composite plate need not heat treatment, good combination property can be obtained.
Description
Technical field
The invention belongs to bimetallic composite manufacturing field, relate in particular to a kind of TMCP type bridge stainless steel double
The preparation method of plywood.
Background technology
At present, the high-speed railway of China and the bridge deck design of passenger dedicated railway line steel bridge all use orthotropic rectangular plates structure
Steel Bridge Deck, easily produce hydrops in ballast tub and bridge floor junction, and then cause the corrosion of bridge floor, finally affect railway steel bridge
Service life.Bridge stainless steel clad plate, has the stainless corrosion resistance of coating and the obdurability of base material bridge steel concurrently,
Use stainless steel clad plate just can solve the etching problem of bridge floor on railway deck.Therefore, bridge stainless steel clad plate
Railway steel bridge will gradually be applied.
Generally, stainless steel clad plate has explosion method and rolling to produce.Explosion method is big due to noise, deposits environment
There is pollution, and affected by weather relatively big, be not a kind of continuable composite plate technology of preparing.Rolling is to use high temperature rolling
Mode, utilize interatomic diffusion to make to cover material and base material realize good metallurgical binding, its produce composite plate, plate width can spirit
Live and adjust, be a kind of continuable production technology of environmental protection.Therefore, using rolling to produce composite plate will be future development
Trend.
At present, bridge industry composite plate, the stainless steel clad plate of the general normalizing state using explosion method to prepare delivery, should
The main normalized steel plate of base material of composite plate is main, and carbon equivalent is higher, and welding difficulty is big, is unfavorable for site operation；And use vacuum
Rolling produces composite plate, and existing traditional handicraft is mainly by soldering and sealing surrounding, and the method for evacuation of then holing again carries out assembly,
Such as patent publication No. CN103639203A " vacuum packaging method of symmetrical hot rolling manufacture stainless steel clad plate " and patent publication No.
This method is utilized to carry out assembly just disclosed in CN104708276A " preparation method of a kind of stainless steel clad plate ", because this method needs
Holing after soldering and sealing evacuation, technique is relatively complicated, and completes mainly by manual operation again.The assemble pattern of another novelty is
Electron beam directly welds assembly under vacuum conditions, and vacuum of holing after eliminating soldering and sealing, such as patent publication No.
Use electron beam by rustless steel and carbon just disclosed in CN102069289A " preparation method of a kind of Stainless Steel-Carbon Steel Clad Sheet "
Steel carries out welding assembly the most under vacuum conditions, and the method then reheating rolling prepares composite plate, but this method is not due to
There is the biggest difference with the thermal coefficient of expansion of carbon steel in rust steel, heating process is easy to because swell increment is different make rustless steel and carbon steel
Bond open, be rolled into power the highest.
Summary of the invention
The technical problem to be solved is, the shortcoming overcoming prior art, it is provided that a kind of TMCP type bridge is not with
The preparation method of rust steel composite board, the bridge steel that base material used designs for low-carbon (LC), by adding strip of paper used for sealing, utilize under vacuum conditions
The mode assembly that strip of paper used for sealing is welded by electron beam with base material, then roll through TMCP technique, the bridge preparing good metallurgical binding is used
Stainless steel clad plate, efficiently solves board substrate carbon equivalent height and is difficult to the problem of welding, and base process decreases simultaneously
The operations such as boring evacuation, technique is simple, and it is high to be rolled into power.
The present invention solves the technical scheme of above technical problem:
The preparation method of a kind of TMCP type bridge stainless steel clad plate, comprises the following steps:
(i) blank prepares: according to steel grade and the specification of finished product composite plate, determines base material and covers material blank steel grade and specification；
(ii) surface processes: with the face to be composite covering material blank, base material is carried out grinding process, removes the rusty scale of blank surface
And oxide layer, make surface be completely exposed fresh metal；
(iii) interleaving agent brushing: carry out interleaving agent brushing to covering material non-composite face, it is ensured that interleaving agent is uniformly brushed and covered material table
On face, the most again interleaving agent is dried；
(iv) blank is combined: strip of paper used for sealing spot welding is fixed by the surrounding edge of to be composite of one block of base material wherein, and strip of paper used for sealing height is
Two pieces of thickness sums covering material, width is 30-60mm；Then cover material non-composite face to overlap two pieces, and be placed on strip of paper used for sealing and surround
Groove in, then by another block base material composite surface down, cover and cover above material at two pieces, it is ensured that outside base material four side is with strip of paper used for sealing up and down
Limit is concordant, forms a composite billet treating soldering and sealing；
(v) electron beam soldering and sealing: the composite billet organized is delivered to vacuum chamber, then to vacuum chamber, treats vacuum chamber vacuum
Degree reaches 10 × 10-2During below Pa, vacuum electron beam is used to be welded in the gap between composite billet strip of paper used for sealing and base material；
(vi) heating: composite billet is delivered to heating furnace heating, heating-up temperature is at 1100-1250 DEG C, and total time is pressed blank in heating
Thickness controlled with the time of 9-16min/cm；
(vii) rolling and cool down: use TMCP technique to roll, workpiece thickness is 1.8-3.0 times of rolling gross thickness,
Finish rolling start rolling temperature 900-970 DEG C, finishing temperature control 800-900 DEG C；Big pressure mode is used to roll, it is ensured that rough rolling step is
Rear a time reduction ratio is more than 20%；Throw at a high speed steel after rolling, composite plate be directly entered ultra-fast cooling device carry out with 2-20 DEG C/
S speed quickly cools down, and red temperature controls at 550-700 DEG C；
(viii) aligning: the steel plate after rolling is carried out straightening processing, after aligning, upper cold bed cooling, treats that surface temperature is down to 300
Can roll off the production line time below DEG C；
(ix) a cutting point plate: use plasma or flame cutting mode to cut composite plate, through crop, tail and cut both sides
After, upper and lower two one side composite plates separate, then one side composite plate is carried out straightening processing, through surface polishing, performance detection, packing
After process, the final stainless steel clad plate product obtaining required specification.
The technical scheme that the present invention limits further is:
The preparation method of aforesaid TMCP type bridge stainless steel clad plate, wherein step (i) in base material blank steel grade be
Using the bridge steel of low-carbon (LC) design, its chemical composition is by weight percentage: C:0.05%-0.14%, Si:0.1%-0.5%,
Mn:1.0%-1.6%, P≤0.02%, S≤0.01%, Nb:0.010%-0.090%, V≤0.080%, Ti:0.006%-
0.030%, Alt:0.015%-0.050%, Cr≤0.30%, Ni≤0.30%, Cu≤0.30%, surplus be Fe and a small amount of the most not
Evitable impurity.
The preparation method of aforesaid TMCP type bridge stainless steel clad plate, wherein step (i) in, covering material blank steel grade is
Rustless steel, as S30408, S31603 or rustless steel, its composition and the performances such as 321 meet corresponding standard-required.
The preparation method of aforesaid TMCP type bridge stainless steel clad plate, wherein step (v) in electron beam soldering and sealing, envelope
Weld penetration between bar and base material is 30-60mm, and to provide enough weld strengths to guarantee, the composite billet operation of rolling does not ftractures.
The preparation method of aforesaid TMCP type bridge stainless steel clad plate, wherein step (vii) middle operation of rolling rough rolling step
Compression ratio >=2.0, the compression ratio that rough rolling process is bigger, it is ensured that base material and cover the abundant diffusion of atom between material, finally realize
The good metallurgical binding of composite plate；
The preparation method of aforesaid TMCP type bridge stainless steel clad plate, wherein step (ix) in stainless steel clad plate produce
Product, its gross thickness is 5-60mm, and covering material thickness is 0.5-10mm.
The preparation method of aforesaid TMCP type bridge stainless steel clad plate, wherein step (iv) in strip of paper used for sealing be low-alloy steel
Material, material is with the composition of base material and intensity quite.The present invention compared with prior art, has the advantage that
Base material the most of the present invention uses the bridge steel of low-carbon (LC) design, prepared bridge stainless steel clad plate, its base material carbon
Equivalent is low, does not preheat and can directly weld, it is simple to site operation.
(2) the present invention direct soldering and sealing under vacuum chamber environment, decreases the operations such as the boring of traditional handicraft, evacuation, vacuum
Spend more secure.
(3) the present invention welds organized composite billet by strip of paper used for sealing and base material, it is to avoid because of heating process rustless steel and carbon steel
The problem that swell increment is inconsistent and ftractures.
(4) the present invention passes through TMCP technique, it is ensured that the performance that base material bridge steel is good, the quick cooling after simultaneously rolling, and controls
Cover material stainless intergranular precipitate, it is ensured that covering the good corrosion resistance of material, additionally composite plate need not heat treatment, can obtain
Good combination property.
Accompanying drawing explanation
Fig. 1 is the composite plate Interface Microstructure figure of the embodiment of the present invention 2.
Detailed description of the invention
Embodiment 1
The present embodiment selects the Q345qD steel grade of base material sotck thinkness 96mm, and chemical composition is shown in Table 1, covers material sotck thinkness and is
321 rustless steels of 18mm, mill product thickness is the 321+Q345qD composite plate of 3+16mm.
Two blocks of Q345qD base material blanks and two piece of 321 one of them surface covering material blank are polished, removes blank
The rusty scale on surface and oxide layer, make surface be completely exposed fresh metal.Do not polish external coating interleaving agent to covering material, then will be every
Dry from agent.Strip of paper used for sealing is fixed in the surrounding edge spot welding on surface of having polished one of base material, and strip of paper used for sealing height is 36mm, and width is
45mm；The non-composite face covering material by two pieces overlaps, and is placed in the groove that strip of paper used for sealing surrounds, then by another block base material composite surface down,
Cover and cover above material at two pieces, ensure that upper and lower base material four side is concordant with outside strip of paper used for sealing simultaneously, the most i.e. composition one treats soldering and sealing
Composite billet.The composite billet organized is delivered to vacuum chamber, then to vacuum chamber, treats that vacuum degree in vacuum chamber reaches 4 × 10- 2During Pa, using electron beam to be welded in the gap between strip of paper used for sealing with base material, i.e. obtaining gross thickness is 228mm composite billet.
Composite billet is delivered to walking beam furnace heating, heating-up temperature 1200 DEG C, heats total time 230min.Use TMCP
Technique rolls, and workpiece thickness is 90mm, finish rolling start rolling temperature≤930 DEG C, finishing temperature control about 830 DEG C.Roughing
Stage, last percentage pass reduction was about 27%, and final rolling thickness is 38mm, was directly entered ultrafast cold quick cooling after rolling,
Red temperature is at about 650 DEG C.Roll the upper cold bed cooling after aligning of rear composite plate, treat that surface temperature is down to 300 DEG C and is rolled off the production line.Through cutting
Head, tail and after cutting both sides, upper and lower two single layer composite separate, then single layer composite carry out straightening processing, then to covering material
Polish in surface, the final 321+Q370qD composite board product obtaining finished product thickness 3+16mm.
Embodiment 2
The present embodiment selects the Q370qD steel grade of base material sotck thinkness 192mm, and chemical composition is shown in Table 1, covers material sotck thinkness
For the S31603 rustless steel of 16mm, mill product thickness is the S31603+Q370qD composite plate of 3+36mm.
Two blocks of Q370qD base material blanks and two pieces of S31603 are covered one of them surface of material blank polish, remove blank
The rusty scale on surface and oxide layer, make surface be completely exposed fresh metal.Do not polish external coating interleaving agent to covering material, then will be every
Dry from agent.Having polished one of base material the surrounding edge spot welding strip of paper used for sealing on surface, strip of paper used for sealing height is 32mm, and width is
50mm；The non-composite face covering material by two pieces overlaps, and is placed in the groove that strip of paper used for sealing surrounds, then by another block base material composite surface down,
Cover and cover above material and groove at two pieces, it is ensured that base material four side is concordant with outside strip of paper used for sealing up and down, the most i.e. composition one treats soldering and sealing
Composite billet.The composite billet organized is delivered to vacuum chamber, then to vacuum chamber, treats that vacuum degree in vacuum chamber reaches 5 × 10- 2During Pa, using electron beam to be welded in the gap between strip of paper used for sealing with base material, i.e. obtaining gross thickness is 416mm composite billet.
Composite billet is delivered to trolley heating furnace heating, heating-up temperature 1200 DEG C, heats total time 500min.Use TMCP work
Skill rolls, and workpiece thickness is 160mm, finish rolling start rolling temperature≤900 DEG C, finishing temperature control about 830 DEG C.Roughing rank
Last percentage pass reduction of section is about 25%, and final rolling thickness is 78mm, is directly entered ultrafast cold ACC mode cold after rolling
But, red temperature is at about 620 DEG C.Roll the upper cold bed cooling after aligning of rear composite plate, treat that surface temperature is down to 300 DEG C and is rolled off the production line.
Again through crop, tail and after cutting both sides, upper and lower two single layer composite separate, then single layer composite carry out straightening processing, then
To covering the polishing of material surface, the final S31603+Q370qD composite board product obtaining finished product thickness 3+36mm.
The Interface Microstructure figure of composite plate as it is shown in figure 1, as figure shows, does not finds between rustless steel and bridge steel not tie
Closing region, composite plate realizes good metallurgical binding.
Embodiment 3
The present embodiment selects the Q370qE steel grade of base material sotck thinkness 107mm, and chemical composition is shown in Table 1, covers material sotck thinkness
For the S31603 rustless steel of 16mm, mill product thickness is the S31603+Q370qE composite plate of 3+20mm.
Two blocks of Q370qE base material blanks and two pieces of S31603 are covered one of them surface of material blank polish, remove blank
The rusty scale on surface and oxide layer, make surface be completely exposed fresh metal.Do not polish external coating interleaving agent to covering material, then will be every
Dry from agent.Having polished one of base material the surrounding edge spot welding strip of paper used for sealing on surface, strip of paper used for sealing height is 32mm, and width is
40mm；The non-composite face covering material by two pieces overlaps, and is placed in the groove that strip of paper used for sealing surrounds, then by another block base material composite surface down,
Cover and cover above material and groove at two pieces, it is ensured that base material four side is concordant with outside strip of paper used for sealing up and down, the most i.e. composition one treats soldering and sealing
Composite billet.The composite billet organized is delivered to vacuum chamber, then to vacuum chamber, treats that vacuum degree in vacuum chamber reaches 5 × 10- 2During Pa, using electron beam to be welded in the gap between strip of paper used for sealing with base material, i.e. obtaining gross thickness is 246mm composite billet.
Composite billet is delivered to walking beam furnace heating, heating-up temperature 1200 DEG C, heats total time 250min.Use TMCP
Technique rolls, and workpiece thickness is 96mm, finish rolling start rolling temperature≤910 DEG C, finishing temperature control about 820 DEG C.Roughing
Stage, last percentage pass reduction was about 27%, and final rolling thickness is 46mm, was directly entered ultrafast cold quick cooling after rolling,
Red temperature is at about 650 DEG C.Roll the upper cold bed cooling after aligning of rear composite plate, treat that surface temperature is down to 250 DEG C and is rolled off the production line.Through cutting
Head, tail and after cutting both sides, upper and lower two single layer composite separate, then single layer composite carry out straightening processing, then to covering material
Polish in surface, the final S31603+Q370qE composite board product obtaining finished product thickness 3+20mm.
Embodiment 4
The present embodiment selects the Q420qE steel grade of base material sotck thinkness 60mm, and chemical composition is shown in Table 1, covers material sotck thinkness and is
The S30403 rustless steel of 12mm, mill product thickness is the S30403+Q370qE composite plate of 2+10mm.
Two blocks of Q420qE base material blanks and two pieces of S31603 are covered one of them surface of material blank polish, remove blank
The rusty scale on surface and oxide layer, make surface be completely exposed fresh metal.Do not polish external coating interleaving agent to covering material, then will be every
Dry from agent.Having polished one of base material the surrounding edge spot welding strip of paper used for sealing on surface, strip of paper used for sealing height is 24mm, and width is
35mm；The non-composite face covering material by two pieces overlaps, and is placed in the groove that strip of paper used for sealing surrounds, then by another block base material composite surface down,
Cover and cover above material and groove at two pieces, it is ensured that base material four side is concordant with outside strip of paper used for sealing up and down, the most i.e. composition one treats soldering and sealing
Composite billet.The composite billet organized is delivered to vacuum chamber, then to vacuum chamber, treats that vacuum degree in vacuum chamber reaches 5 × 10- 2During Pa, using electron beam to be welded in the gap between strip of paper used for sealing with base material, i.e. obtaining gross thickness is 144mm composite billet.
Composite billet is delivered to walking beam furnace heating, heating-up temperature 1200 DEG C, heats total time 170min.Use TMCP
Technique rolls, and workpiece thickness is 60mm, finish rolling start rolling temperature≤900 DEG C, finishing temperature control about 820 DEG C.Roughing
Stage, last percentage pass reduction was about 28%, and final rolling thickness is 24mm, was directly entered ultrafast cold ACC mode cold after rolling
But, red temperature is at about 550 DEG C.Roll the upper cold bed cooling after aligning of rear composite plate, treat that surface temperature is down to 250 DEG C and is rolled off the production line.
Through crop, tail and after cutting both sides, upper and lower two single layer composite separate, then single layer composite carries out straightening processing, the most right
Cover the polishing of material surface, the final S30403+Q420qE composite board product obtaining finished product thickness 2+10mm.
The smelting composition of table 1 embodiment of the present invention steel grade:
| Embodiment | C | Si | Mn | P | S | Nb | V | Ti | Alt | Cr | Ni | Cu |
| Embodiment 1 | 0.13 | 0.20 | 1.45 | 0.014 | 0.0050 | 0.015 | 0.001 | 0.015 | 0.035 | / | / | / |
| Embodiment 2 | 0.10 | 0.24 | 1.46 | 0.012 | 0.0035 | 0.035 | 0.001 | 0.017 | 0.036 | 0.13 | / | 0.013 |
| Embodiment 3 | 0.095 | 0.25 | 1.48 | 0.012 | 0.0025 | 0.027 | 0.001 | 0.018 | 0.034 | 0.13 | 0.25 | 0.012 |
| Embodiment 4 | 0.075 | 0.28 | 1.52 | 0.012 | 0.0023 | 0.045 | 0.003 | 0.015 | 0.035 | 0.16 | / | 0.015 |
In addition to the implementation, the present invention can also have other embodiments.All employing equivalents or equivalent transformation shape
The technical scheme become, all falls within the protection domain of application claims.
Claims (6)
1. the preparation method of a TMCP type bridge stainless steel clad plate, it is characterised in that: comprise the following steps:
(i) blank prepares: according to steel grade and the specification of finished product composite plate, determines base material and covers material blank steel grade and specification；
(ii) surface processes: with the face to be composite covering material blank, base material is carried out grinding process, removes rusty scale and the oxygen of blank surface
Change layer, make surface be completely exposed fresh metal；
(iii) interleaving agent brushing: carry out interleaving agent brushing to covering material non-composite face, it is ensured that interleaving agent is uniformly brushed and covered on material surface,
The most again interleaving agent is dried；
(iv) blank is combined: strip of paper used for sealing spot welding is fixed by the surrounding edge of to be composite of one block of base material wherein, and strip of paper used for sealing height is two pieces
Covering the thickness sum of material, width is 30-60mm；Then cover material non-composite face to overlap two pieces, and be placed on the groove that strip of paper used for sealing surrounds
In, then by another block base material composite surface down, cover and cover above material at two pieces, it is ensured that put down outside base material four side and strip of paper used for sealing up and down
Together, one composite billet treating soldering and sealing of composition；
(v) electron beam soldering and sealing: the composite billet organized is delivered to vacuum chamber, then to vacuum chamber, treats that vacuum degree in vacuum chamber reaches
To 10 × 10-2During below Pa, vacuum electron beam is used to be welded in the gap between composite billet strip of paper used for sealing and base material；
(vi) heating: composite billet is delivered to heating furnace heating, heating-up temperature is at 1100-1250 DEG C, and heating total time is by sotck thinkness
Control with the time of 9-16min/cm；
(vii) rolling and cool down: use TMCP technique to roll, workpiece thickness is 1.8-3.0 times of rolling gross thickness, finish rolling
Start rolling temperature 900-970 DEG C, finishing temperature control 800-900 DEG C；Use big pressure mode to roll, it is ensured that rough rolling step last
Percentage pass reduction is more than 20%；Throwing at a high speed steel after rolling, composite plate is directly entered ultra-fast cooling device and carries out with 2-20 DEG C/s speed
Quickly cooling, red temperature controls at 550-700 DEG C；
(viii) aligning: the steel plate after rolling is carried out straightening processing, upper cold bed cooling after aligning, treat surface temperature be down to 300 DEG C with
Can roll off the production line time lower；
(ix) a cutting point plate: use plasma or flame cutting mode that composite plate is cut, through crop, tail and after cutting both sides,
Upper and lower two one side composite plates separate, then one side composite plate is carried out straightening processing, at surface polishing, performance detection, packing
After reason, the final stainless steel clad plate product obtaining required specification.
2. the preparation method of TMCP type bridge stainless steel clad plate as claimed in claim 1, it is characterised in that: described step
(i) the base material blank steel grade in is the bridge steel using low-carbon (LC) design, and its chemical composition is by weight percentage: C:0.05%-
0.14%, Si:0.1%-0.5%, Mn:1.0%-1.6%, P≤0.02%, S≤0.01%, Nb:0.010%-0.090%, V≤
0.080%, Ti:0.006%-0.030%, Alt:0.015%-0.050%, Cr≤0.30%, Ni≤0.30%, Cu≤0.30%, remaining
Amount is Fe and a small amount of inevitably impurity.
3. the preparation method of TMCP type bridge stainless steel clad plate as claimed in claim 1, it is characterised in that: described step
(i), in, covering material blank steel grade is rustless steel.
4. the preparation method of TMCP type bridge stainless steel clad plate as claimed in claim 1, it is characterised in that: described step
(v) the electron beam soldering and sealing in, the weld penetration between strip of paper used for sealing and base material is 30-60mm, multiple to provide enough weld strengths to guarantee
Close the base operation of rolling not ftracture.
5. the preparation method of TMCP type bridge stainless steel clad plate as claimed in claim 1, it is characterised in that: described step
Compression ratio >=2.0 of the middle operation of rolling rough rolling step.
6. the preparation method of TMCP type bridge stainless steel clad plate as claimed in claim 1, it is characterised in that: described step
(ix) the stainless steel clad plate product in, its gross thickness is 5-60mm, and covering material thickness is 0.5-10mm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610706997.1A CN106271414B (en) | 2016-08-23 | 2016-08-23 | A kind of preparation method of TMCP types bridge stainless steel clad plate |
| PCT/CN2017/096606 WO2018036382A1 (en) | 2016-08-23 | 2017-08-09 | Method for preparing stainless steel composite plate for tmcp bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610706997.1A CN106271414B (en) | 2016-08-23 | 2016-08-23 | A kind of preparation method of TMCP types bridge stainless steel clad plate |
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| CN106271414A true CN106271414A (en) | 2017-01-04 |
| CN106271414B CN106271414B (en) | 2018-06-19 |
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| WO2018036382A1 (en) | 2018-03-01 |
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