CN101184578A - A method of brazing articles of stainless steel - Google Patents
A method of brazing articles of stainless steel Download PDFInfo
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- CN101184578A CN101184578A CNA2006800183684A CN200680018368A CN101184578A CN 101184578 A CN101184578 A CN 101184578A CN A2006800183684 A CNA2006800183684 A CN A2006800183684A CN 200680018368 A CN200680018368 A CN 200680018368A CN 101184578 A CN101184578 A CN 101184578A
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- stainless steel
- brazing
- goods
- parts
- filler material
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- 238000005219 brazing Methods 0.000 title claims abstract description 127
- 238000000034 method Methods 0.000 title claims abstract description 75
- 239000010935 stainless steel Substances 0.000 title claims abstract description 49
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 49
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 161
- 239000000463 material Substances 0.000 claims abstract description 135
- 239000000945 filler Substances 0.000 claims abstract description 93
- 229910052742 iron Inorganic materials 0.000 claims abstract description 83
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 230000001590 oxidative effect Effects 0.000 claims abstract description 9
- 208000037656 Respiratory Sounds Diseases 0.000 claims description 33
- 238000007789 sealing Methods 0.000 claims description 18
- 238000011049 filling Methods 0.000 claims description 15
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 229910052796 boron Inorganic materials 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- PZZOEXPDTYIBPI-UHFFFAOYSA-N 2-[[2-(4-hydroxyphenyl)ethylamino]methyl]-3,4-dihydro-2H-naphthalen-1-one Chemical compound C1=CC(O)=CC=C1CCNCC1C(=O)C2=CC=CC=C2CC1 PZZOEXPDTYIBPI-UHFFFAOYSA-N 0.000 claims description 2
- 238000005275 alloying Methods 0.000 claims description 2
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 2
- 239000001569 carbon dioxide Substances 0.000 claims description 2
- 235000013305 food Nutrition 0.000 claims description 2
- 238000009689 gas atomisation Methods 0.000 claims description 2
- 229910052734 helium Inorganic materials 0.000 claims description 2
- 239000001307 helium Substances 0.000 claims description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 229910052698 phosphorus Inorganic materials 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 238000004528 spin coating Methods 0.000 claims description 2
- 238000009692 water atomization Methods 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims 1
- 239000011261 inert gas Substances 0.000 claims 1
- 150000002505 iron Chemical class 0.000 claims 1
- 238000012423 maintenance Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 27
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 26
- 239000010949 copper Substances 0.000 description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 10
- 229910045601 alloy Inorganic materials 0.000 description 10
- 239000000956 alloy Substances 0.000 description 10
- 239000011651 chromium Substances 0.000 description 10
- 229910052802 copper Inorganic materials 0.000 description 10
- 229910052759 nickel Inorganic materials 0.000 description 7
- 229910052804 chromium Inorganic materials 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 238000005476 soldering Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
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- 238000012856 packing Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
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- 230000008034 disappearance Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000013569 fruit product Nutrition 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000007542 hardness measurement Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005551 mechanical alloying Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
- B23K1/001—Sealing small holes in metal containers, e.g. tins
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/3066—Fe as the principal constituent with Ni as next major constituent
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/041—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by mechanical alloying, e.g. blending, milling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Details Of Heat-Exchange And Heat-Transfer (AREA)
- Gasket Seals (AREA)
Abstract
The present invention relates to a method of brazing articles of stainless steel, which method comprises the following steps: step (i) applying an iron-based brazing filler material to parts of stainless steel; step (ii) optionally assembling the parts; step (iii) heating the parts from step (i) or step (ii) to a temperature of at least 1000 DEG C in a non-oxidizing atmosphere, a reducing atmosphere, vacuum or combinations thereof, and heating the parts at the temperature of at least 1000 DEG C for at least 15 minutes; step (iv) providing articles having an average hardness of less than 600 HV1 of the obtained brazed areas. The present invention relates also to brazed articles of stainless steel.
Description
The present invention relates to the method for brazing articles of stainless steel, the invention still further relates to stainless steel products.
Background of invention
When making the brazing goods, when particularly making the fluid sealing article that does not leak, the sealing in crack and hole and the brazing of joint are key factors.When joint, crack and hole area are big, will increase the sealing of braze filler and the importance of filling capacity, still, sealing and the ability of filling certainty are associated with the intensity in the zone of brazing.Therefore, need provide the goods that have at the sufficient intensity of intended purposes or purposes.Developed and put down in writing different method of brazing, such as: at US 6,109,505 and US 4,516,716, these files disclose stainless brazing.
Another demand of the present invention provides stainless brazing goods.
Another demand provides the improvement way that brazing has the stainless steel products in big hole, crackle, joint, slit or crack.
Summary of the invention
According to one aspect of the present invention, provide the method for brazing or soldering stainless steel products.Use brazing (brazing) hereinafter, it should be understood that this term also comprises soldering (soldering), material of the present invention comprises soldering material and brazing material.Therefore, method of brazing comprises: step (i): the braze filler material of iron-based is applied to parts of stainless steel; Step is (ii): randomly assemble these parts; Step is (iii): will be heated at least 1000 ℃ from step (i) or step parts (ii) in non-oxidizing atmosphere, reducing atmosphere, vacuum or their combination, and heat these parts at least 15 minutes at least 1000 ℃ temperature; Step is (iv): the average hardness of brazed area that acquisition is provided is less than the 600HV1 (goods of Vickers Hardness test-Part1:Test method (ISO 6507-1:1997); And step (v): randomly repeating step (i), step (ii) with step one in (iii) step or multistep.
According to an alternative aspect of the present invention, the method for brazing articles of stainless steel is provided, this comprises and comprises alternative step method (iv)---step (iv) comprises sealing and fills joint, hole, crackle, gap or crack greater than 76 μ m.
The invention further relates to the stainless steel products that adopts this way to obtain, wherein, the brazed area that is obtained, joint, hole, crackle, gap or crack have 110N/mm at least
2Tensile strength.
The invention further relates to the stainless steel products that adopts this way to obtain, wherein, obtainable brazed area, joint, hole, crackle, gap or crack have the average hardness that is lower than 600HV1.
Although the smallclothes object of same material manufacturing is identical with the thermal coefficient of expansion of big part object, bigger object still has bigger bulk expansion.If one of two objects that have equal length at uniform temp are heated, for identical temperature difference, the difference of length is directly proportional with the size difference of object.These two factors all can cause bigger crack, and these cracks must be gone to fill with the braze filler material.Therefore, the large scale of metal object (such as area, length, width, thickness etc.) can exert an influence to the accuracy of brazed joint or brazed area, and this is because the thermal expansion meeting between parts is different and may cause uneven adaptive and large fracture.When inhomogeneous other adaptive situations may result from design, the brazing goods of parts to be installed move or the manufacture process of parts to be installed in.Therefore, when brazed joint or zone etc., important aspect is filling and the sealing property in the brazing process.
Copper (Cu) has the superperformance of sealing large fracture.The character limitation that not use copper be the copper braze filler as a reason of brazing thing, such as: copper can cause dissimilar etching problems.The most conspicuous problem is that copper can be consumed because of corrosion.The consumption of copper can reduce the mechanical strength of object, and object can begin to leak.Copper corrosion product and copper ion are discharged into the galvanic corrosion that can cause miscellaneous part in the same system that this object wherein has been installed in the medium of object.Silver braze filler can be a kind of option, but is of little use because of silver-colored valency is high.
Nickel (Ni) braze filler that contains chromium (Cr) has the corrosion resistance more excellent than copper braze filler, and still, the Ni braze filler also has some shortcomings.One of shortcoming is when being used to use such as water, and nickel can discharge from the ambrose alloy weldering.Limited by law such as the nickel content in the running water.The Ni ion also can cause the galvanic corrosion of miscellaneous part in the same system that this object wherein has been installed.
An important issue about intensity is that the braze filler material can be filled great crack or gap.The performance that ambrose alloy weldering filler is filled the crack is limited, in addition, referring to ASM Handbook, Volume 6, Welding, Brazing and Soldering, 1993 printing/Brazingof stainless steel 911-913 pages or leaves first, large fracture (such as: greater than the crack of 0.076mm) the Ni braze filler also can lose intensity.Therefore, be difficult to prepare big Ni brazing object.
Multiple factor is depended in the selection of the specific brazing solder in concrete the application.Basic consideration is temperature and the material for the treatment of brazing.In any brazing process, the braze filler material must have sufficiently high solidus temperature to give the brazing assembly required character.The enough low liquidus temperature of this process need is with compatible with the temperature performance of wanting attaching parts.According to one aspect of the present invention, provide by with basic substance substantially the alloy of same composition come brazing stainless steel base material to prepare the method for stainless steel products, therefore, uniform alloy joint between thing and the basic thing provides the foundation.Brazing alloy comprises iron as main component, and alloy can be ferrous alloy or iron based braze filler material.The iron based braze filler material can be crushed by gas or water atomization, melt spin coating, mechanical alloying or ingot bar and be prepared.
When brazed joint, suitable is in the brazing process, and braze material is soaked into the object parts of waiting to be brazed into together, and this braze material can flow in crack, joint and the hole etc.The fusing point that the fusing point of braze filler material is lower than the parts basic substance suits.The relevant nature of braze filler material is its performance of filling crack, joint, hole etc.Ni-based brazing material has the performance in inferior filling crack, therefore, is difficult to produce the large-sized object such as the heat exchanger of large-scale Ni brazing.
Brazing material can be manufactured into template, powder or powder to be mixed with adhesive and forms pastel or brazing material can be dispersed in adhesive and the mixtures of liquids, and this mixture can be brushed or sparge on the surface of basic material.
The braze filler material of iron-based can be used as powder or pastel applies, and a kind of mode is to pass strand or the drop that nozzle applies the iron based braze filler material by compacting iron based braze filler material.The mode that another kind applies the iron based braze filler material is that the adhesive with droplet-like or strand form is applied on the basic material, then braze powder is scattered in the surface.
The inventive method comprises following step:
Step (i) is applied to parts of stainless steel with the iron based braze filler material;
Step is assembling parts randomly (ii);
(iii) in non-oxidizing atmosphere, reducing atmosphere, vacuum or their combinations, heating steps (i) or parts (ii) are at least 1000 ℃ temperature extremely, and heats these parts at least 15 minutes at least 1000 ℃ temperature for step;
Step (iv) provide the brazed area average hardness that obtains less than 600HV1 goods and
Step (v) randomly repeating step (i), step (ii) with step (iii) one the step or multistep.
According to another alternative aspect of the present invention, method comprises following step:
Step (i) is applied to parts of stainless steel with the iron based braze filler material;
Step is assembling parts randomly (ii);
Step is (iii) in non-oxidizing atmosphere, reducing atmosphere, vacuum or their combinations, and heating is from step (i) or the parts (ii) temperature at least 1000 ℃, and heats these parts at least 15 minutes at least 1000 ℃ temperature;
Step (iv) seal or fill greater than joint, hole, crackle, gap or the crack of 76 μ m and
Step (v) randomly repeating step (i), step (ii) with step (iii) one the step or multistep.
According to another alternative aspect, this method can comprise: the goods that provide in (iv) in step perhaps are provided for repeating step (i), and the braze filler material of iron-based is applied to one or more optional feature; With step (ii) in, assembling is from the parts of step (i) or goods and one or more optional feature, perhaps goods that provide in (iv) with step and repeating step (iii) with step (iv).Feasible can the manufacturing in this aspect must be in the substep mode by the goods with somewhat complex design of brazing.
According to another alternative aspect of this method, it comprises: step (iii): the temperature that is heated at least 1100 ℃.According to another alternative aspect of this method, it comprises: step (iii): the temperature that is heated at least 1150 ℃.According to another alternative aspect, heating can continue to be shorter than 15 minutes.According to another alternative aspect of the present invention, temperature brazing article more than 1100 ℃ at least 15 minutes, the longer brazing time was all relevant with a lot of application.Parts or goods can be heated to the temperature of brazing material fusing.The inventive method can comprise step (iii), this step comprises: the preheating parts are to for example at least 400 ℃, at least 500 ℃, perhaps even at least 550 ℃ and make these parts under this temperature, continue for example at least 15 minutes, at least 30 minutes, at least 1 hour, perhaps in addition the longer time, the temperature that raises then is extremely such as at least 900 ℃, at least 1000 ℃ or even at least 1100 ℃, parts are placed in this temperature so that the temperature balance in the parts also is that the temperature of entire portion and brazing material equates.Make the temperature balance time depend on the size for the treatment of the brazing goods, for less goods, the shorter perhaps time is just enough.For example, the suitable time is at least 1 hour, at least 2 hours, and at least 3 hours or even longer time.Temperature depends on that the liquidus curve-solidus temperature of brazing material and the composition and the fusing point of brazing alloy reduce element.Make after the temperature balance for the treatment of the brazing parts, temperature is elevated to the brazing temperature.Brazing time and brazing temperature all depend on brazing material and the size and dimension that need treat the goods of brazing.The brazing process can be divided into: A) fusion brazing material, B) by flow brazing material and settle the fusion brazing material of the capillary force between adjacently situated surfaces; And C) with the brazing material element along the basic material for the treatment of the brazing parts or alloy diffusion.
During the brazing process, brazing material spreads along adjacently situated surfaces, makes they and brazing material form the material area of local homogeneous together.
Temperature as the fruit product middle part is not high enough, and mid portion can't be by brazing, this be because: brazing material will can not melt, and the performance of goods will deterioration.
The example of brazing time and temperature is: according in a certain respect of the present invention, be heated at least 1100 ℃ and also heated at least 15 minutes.According to another alternative aspect of the present invention, be heated at least 1100 ℃ and also heated at least 30 minutes.According to another alternative of the present invention, be heated at least 1100 ℃ and also heated at least 45 minutes.According to another alternative of the present invention, goods heated above 60 minutes.According to another alternative, temperature can be at least 1150 ℃, and the time is at least 25 minutes.
Large-scale heat exchanger can have the some blocks of plates that are stacked.The plate sub-assembly can comprise 10,20 or polylith plate more.Heat exchanger can have 100,150,200 or polylith metallic plate more.Large-scale heat exchanger can be defined by the area that heat exchanger is electroplated, and the mode of the large-scale heat exchanger of another kind of definition is the quantity of plate.
In the brazing process, brazing material spreads along adjacently situated surfaces, makes they and brazing material form the material area of local homogeneous together.
The joint that may be difficult to a plurality of plane copper are soldered to together and form sealing with traditional approach.The invention provides a kind of method, it contains the fusing point depressant by use iron-based braze material is soldered to two plane copper together, and used mode makes the capillarity that is placed on the brazing material that causes between the surface to be controlled.Assisting down of capillary force disruptor, the iron based braze filler material can be applied to plane or big surface.The capillary force disruptor can adopt groove, route, path, path, v type or forms such as u type route or track, perhaps adopts forms such as net.The iron based braze filler material can be applied on the capillary force disruptor, such as: be applied on the route or track and net type etc. of groove, route, path, path, v type or u type, perhaps the braze filler material be applied near the capillary force disruptor.In heating process, the iron based braze filler material that is applied will flow to capillary force can ruined zone, and next-door neighbour's surface mutually is brazed into together.Therefore, be difficult between the brazing uniform in-plane zone in other ways, this brazed area provides crack brazing, sealing and firm and joint etc.The capillary force disruptor also can become possibility so that brazing has the surface and the unusual shape parts etc. in large-scale crack.
In the time of between braze material is applied near two parts of capillary force disruptor, mobile thickness braze material will stop to flow and be placed in the edge of capillary force disruptor.Channel of reactor can serve as the function of capillary force disruptor.Apply braze material to plate, and allow baffle plate or analog contact placement with the channel of reactor plate with channel of reactor.The braze material that flows will stop and being positioned in the edge of channel of reactor, and this will be against baffle plate sealed reactor plate, and does not use fixedly braze material filling reactor passage.
Braze material partly depends on the setting time of braze material, distance between the surface and the amount of braze material in the distance that flows between adjacent surface.Since braze material " adhesion " is to each surface for the treatment of brazing, it is narrower and small that the intermediate space between the surface will become.When brazing material was fixed up, it is narrow and small that intermediate space becomes, and this just makes that braze material more is difficult to flow betwixt.
This method can further comprise in (iii) in step: the brazing process can take place when inertia or active protection gas exist.Heating process or brazing process can be selected from one or more gases in helium, argon, nitrogen, hydrogen, the carbon dioxide or are implemented one or more above-mentioned mentioning under gas and the situation that vacuum combines in existence.
In addition according to the another alternative aspect of the inventive method, brazing district or brazed area such as the joint of brazing, hole, crackle, gap, crack etc., can provide the average hardness less than 600HV1.According to the another alternative aspect of this method, brazing district or brazed area can provide the average hardness less than 500HV1.According to the another alternative aspect of this method, brazing district or brazed area can provide the average hardness less than 400HV1.According to the another alternative aspect of this method, brazing district or brazed area can provide the average hardness less than 350HV1.According to the another alternative aspect of this method, brazing district or brazed area can provide the average hardness less than 300HV1.
Because the iron based braze filler material has mobile and wetability penetrating into the crack, the iron based braze filler material will produce and the combining of basic material, and seal the crack and also can connect the plane through brazing.According to an alternative aspect of the present invention, the iron based braze filler material can seal or fill big hole, crackle, gap, joint or crack to 1000 μ m, can seal or fill big to 3000 μ m or bigger hole, crackle, gap, joint or crack.According to the another alternative aspect of this method, use the iron based braze filler material, can be sealed or fill greater than the hole of 250 μ m, crackle, gap, joint or crack, and the brazing district that obtains or brazed area have the average hardness less than 350HV1.According to the another alternative aspect of this method, use the iron based braze filler material, can be sealed or fill greater than the hole of 1000 μ m, crackle, gap, joint or crack, and the brazing district of gained or brazed area have the average hardness less than 350HV1.
Another alternative aspect according to this method, step (iv) can comprise: sealing or filling are much larger than hole, crackle, gap, joint or the slit of 300 μ m, or their combination, and the brazed area of average hardness less than 350HV1 be provided, described average hardness is recording greater than the center line of the brazed area of 250 μ m blinds or near centerline.
According to another alternative aspect of the present invention, step (iv) can comprise: sealing or filling are much larger than hole, crackle, gap, joint or the slit of 350 μ m, or their combination, and the brazed area of average hardness less than 350HV1 be provided, described average hardness is recording greater than the center line of the brazed area of 300 μ m blinds or near centerline.
Another alternative aspect according to this method, sealing or filling are much larger than hole, crackle, gap, joint or the slit of 500 μ m, or their combination, and the brazed area of average hardness less than 390HV1 be provided, described average hardness is recording greater than the center line of the brazed area of 400 μ m blinds or near centerline.
The braze material of desired amt is supplied to contact point, and this contact point will be brazed together with any described mode or continuation mode.Braze material can cover than the slightly bigger zone of contact tap points.The contact tap points can have the diameter of 0.5mm at least.
According to this method, can use any suitable iron based braze filler material.Suitable iron based braze filler material can be from WO 02/38327, WO 02/098600, US 3,736,128, US4, and 402,742, US 4,410,604, US 4,516, and 716, US 6,656,292 or EP 0,418,606 in selected in the material that discloses.According to an alternative aspect of this method, selected in the material that the iron based braze filler material can disclose from WO 02/38327 or WO 02/098600.According to another alternative aspect of this method, the iron based braze filler material can comprise one or more among Si, B, P, Mn, C or the Hf.Another alternative aspect according to this method, the iron based braze filler material can also comprise Cr, the 5-25% of 9-30% by weight Ni and following one of at least: the Hf of C, the 0-15% of Mn, the 0-2% of P, the 0-8% of the Si of 0-25%, the B of 0-6%, 0-15% and other element of the surplus of thing as an alternative.According to another alternative aspect of this method, the iron based braze filler material can comprise by weight B and other element of the surplus of thing as an alternative of Si, 0.2-1.5% of Ni, 6-15% of Cr, the 5-21% of 40% Fe, 14-21% at least.According to another alternative aspect of this method, the iron based braze filler material can comprise by weight P and other element of the surplus of thing as an alternative of Si, 4-9% of Ni, 4-9% of Cr, the 5-21% of 40% Fe, 14-21% at least.According to another alternative aspect of the present invention, the iron based braze filler material can comprise by weight P and other element of the surplus of thing as an alternative of Ni, 7-15% of Cr, the 5-21% of 40% Fe, 14-21%.
Because the brazing process is metal process, and each surface that is used for brazing all takes the form of metallics, and then, in the brazing process, the iron-based braze material is along the interfacial diffusion of waiting to be brazed into together.According to an aspect of the present invention, in the brazing process, joint between two continuous surfaces or seam will be more or less " disappearance ".The seam of brazing will become the integral body of having only slight change on alloying substance is formed with metal part surface.
The invention still further relates to the stainless steel products that obtains by this method.The invention further relates to stainless brazing goods, these goods comprise at least a stainless steel base material and braze filler material, wherein, obtain tensile strength 110N/mm at least
2Brazed area, hole, crackle, gap, joint or crack.According to another alternative aspect, the brazed area of acquisition, hole, crackle, gap, joint or crack can have 120N/mm at least
2Tensile strength.
The invention still further relates to stainless steel brazing goods, these goods comprise at least a stainless steel base material and iron based braze filler material, and wherein, the brazed area of acquisition, hole, crackle, gap, joint or crack have the average hardness less than 600HV1.According to another alternative aspect, brazing articles of stainless steel comprises at least a stainless steel base material and iron-based braze material, and wherein, the brazed area of acquisition, hole, crackle, gap, joint or crack have the average hardness less than 500HV1.According to another alternative aspect, brazing articles of stainless steel comprises the braze filler material of at least a stainless steel base material and iron-based, and wherein, the brazed area of acquisition, hole, crackle, gap, joint or crack have the average hardness less than 450HV1.According to another alternative aspect, stainless steel brazing goods comprise at least a stainless steel base material and iron based braze filler material, and wherein, the brazed area of acquisition, hole, crackle, gap, joint or crack have the average hardness less than 350HV1.According to a kind of alternative of the present invention, " at least a stainless steel base material " can be brazed into together stainless steel base material by the iron based braze filler material.According to another alternative of the present invention, " at least a stainless steel base material " can be to be brazed into together stainless steel base material and additional metals alloy basic material by the iron based braze filler material.
According to an alternative aspect, goods or parts can be selected from reactor, separator, post, heat exchanger or be used for the chemical plant or food factory or be used for the equipment of auto industry.According to another alternative aspect, object can be heat exchanger, plate-type reactor or their combination.
According to another alternative aspect of the present invention, the brazing goods can be the water distribution dishes, and it is used in the separator.
According to an alternative aspect of the present invention, goods can be the heat exchanger plate of brazing, the reactor sheet of brazing or their combination, and they have the burst pressure of 60Bar at least.According to another alternative aspect, described goods can be the heat exchanger plate of brazing, the reactor sheet of brazing or their combination, and they have the burst pressure of 65Bar at least.According to another alternative aspect, described goods can be the heat exchanger plate of brazing, the reactor sheet of brazing or their combination, and they have the burst pressure of 80Bar at least.According to another alternative aspect, described goods can be that the heat exchanger plate area is greater than 0.2m
2, burst pressure at least 65Bar and duct area greater than 0.003m
2Heat exchanger.
When parts were heat exchanger plate, plate can be an end plate, installing plate (adaptor plate), sealing plate, frame plate etc., and form heat exchanger system.Each heat exchanger plate comprises a port dimple at least, and when plate is placed into a time-out mutually, these port dimples constitute the part of port path together.Plate is stacked in the sheetpile or plate sub-assembly of heat exchanger.Plate sub-assembly between plate comprises some paths, and these paths hold some media.Medium in the adjacent lanes transmits via hot transmission board occurrence temperature in a usual manner.Plate can comprise the edge, the edge that this edge can partly extend and cross hot transmission board adjacent in the sheetpile downwards.The edge of plate seals adjacent hot transmission board as follows: can form path between plate.This path allows media flow, perhaps closes so that do not take place to flow and this path so and vacant.For cured plate sub-assembly and ports zone, installing plate or end plate can prepare according to the size of encapsulation.It is smooth that the surface of end plate or installing plate can keep, and makes that the contact plane between the surface can maximize.As mentioned above, each the port dimple on the plate is consistent, forms path thus.In the inboard of port path, therefore, form the joint between two plates.For avoiding the leakage of joint, braze material can be applied near the port zone between plate.Braze material can be placed within it or phase Lin Chu by the capillary force disruptor, and the capillary force disruptor can completely or partially be extended around the port zone between plate.In the plate sub-assembly, braze material can be applied on the parts of different plates that design in advance or predetermined.In the brazing process, braze material will become thickness and owing to flow out in the parts that applied between the effect slave plate of capillary force.Braze material is applied to advantage on the precalculated position is to make it possible to control the volume of braze material and which parts that the brazing surface is treated in quantity, control by brazing, which is not by brazing.When the brazing heat exchanger, need three heat exchanger plates at least, but normally some plates are brazed to together.According to an alternative aspect of the present invention, the plate sub-assembly of some plates at one time, be brazed to together in the same baking box.
Method of brazing of the present invention can comprise the goods of same time brazing with all the parts assemblings of these goods, also can be with these goods of mode brazing of substep: at first with the assembling of some parts and be brazed into together, then other parts are assembled and are brazed into together, by that analogy, in each braze cycle, use the braze material of same kind.
According to another alternative aspect of the present invention, provide the goods with following feature: wherein, the silicone content of 2wt%Si is at least contained in the area of brazing, hole, crackle, slit, joint or crack.
Further aspect of the present invention and embodiment are defined by dependent claims.
Next, the present invention will explain in further detail by appended photo.
The accompanying drawing summary
The cross-sectional picture of Fig. 1 heat exchanger part
Fig. 2 illustrates the schematic diagram of joint cross section
Fig. 3 illustrates the photo of the cross section of the joint of implementing hardness test thereon
Accompanying drawing describes in detail
Fig. 1 shows, the crack that the iron based braze filler material can filling large, and can carry out brazing with a large amount of braze material. Therefore, large-scale heat exchanger brazed joint is characterised in that: apply a large amount of braze filler and thereby exist large homogenising regional. The original plate thickness of the braze filler of part and part is mixed into the homogenising zone.
Fig. 2 schematically illustrates by the relation between the crack of brazing material F brazing or the different parameters in the joint. Letter A represents the plate thickness of plate E, and E has also represented basic substance E. B has represented brazing crack between basic substance E or the plate E or the minimum thickness of joint, the crack of brazing or the maximum ga(u)ge of joint when C represents without any hole, crackle or path, letter D represents that any hole, crackle or path G open but still is sealed lower, the crack of brazing or the maximum ga(u)ge of joint. Were it not for the vestige of any hole, crackle or path, then C=D. For Ni-based packing material, C=D is less than the C=D for the iron-based packing material. The existence of hole, crackle or path is so that the brazing district becomes more not firm.
Fig. 3 illustrates the cross-sectional picture of the joint of implementing hardness test thereon. Average hardness calculates and depends on the number of times of test with arithmetic average.
The present invention will be in an embodiment further sets forth, and these embodiment are in order to set forth the present invention, rather than in order to limit its scope.In embodiment and form, as do not have other statement, percentage is meant percentage by weight (wt%).
Embodiment 1
Test geometry and be similar to the specimen of the plate pattern in the thin-walled suppressing heat exchanger plate of brazing.The quantity of the braze filler material that is applied approximately is per 4 solder joint 16-20 gram.According to braze filler AWS A5.8 AMS specification, Ni-based braze filler BNi-5 can with contain by weight the iron based braze filler of 56%Fe, 17%Cr, 12%Ni, 12%Si and 1%B and compare.Braze filler is applied to the specimen with 0.3-0.4mm crack, and this sample is being heated to about 1200 ℃ in the stove, in non-oxidizing atmosphere.Assay is summarized in table 1 li.
Table 1
| Sample (gram) | Ni base-BNi-5 (N/mm 2) | Iron-based (N/mm 2) |
| 16 | 109 | 123 |
| 18 | 110 | 126 |
| 20 | 106 | 151 |
Test result shows: iron based braze filler, and both can fill so big crack, and can obtain the extraordinary intensity that can compare with Ni-based braze filler as seeing in Fig. 1.Even on amount of inspection, also can be found out: iron-based braze has best mechanical strength in the check filler.Fig. 1 shows the cross section of iron-based braze heat exchanger, on figure, can see: the crack of 0.4-0.6mm is by firm (tighten).
Embodiment 2
Can find now: iron based braze filler not only has the performance in filling large crack, and also has very high mechanical strength on large-scale crack, and this makes them be suitable for brazing such as large-scale heat exchanger or such as the flat surfaces on the reactor sheet.By the test that the quantity of braze filler and tensile strength contrast are carried out, the result is summarised in table 2 li.
Table 2
| Sample (gram) | Iron-based filler (the present invention) (N/mm 2) |
| 25 | 162 |
| 55 | 227 |
Embodiment 3
Heat treatment cycle by changing the brazing process has been implemented a series of tests to obtain filling effect as well as possible.Found a marked difference, even, can obtain extraordinary filling effect with the iron-based filler in very short heat treatment cycle (5 minutes) lining.Implement the brazings test at 1100 ℃, with Ni-based filler (BNi-5) with contain by weight that the ability in the filling crack of the iron-based filler of 56%Fe, 17%Cr, 12%Ni, 12%Si and 1%B compares.The result is summarized in table 3 li.
Table 3
| Time (minute) | C (Fig. 2) is (μ m) (BNi-5) | C Fig. 2 iron-based filler (μ m) |
| 5 | 130 | 800-1200 |
| 15 | 180 | 800-1200 |
| 30 | 220 | 800-1200 |
| 150 | 300 | 800-1200 |
Test result shows: the joint relatively large for brazing, BNi-5 need to handle for a long time, even but after long heat treatment, BNi-5 still can not fill the crack with the iron-based filler equally goodly.Compare with BNi-5, the iron-based filler can be filled bigger crack in the very short time.The brazing time that BNi-5 uses is long more, compares with the iron-based filler, and the energy that is consumed is also just many more.
Embodiment 4
Hardness test seal clearance that is equal to between two basic materials (model 316) plate in joint goes out to carry out.Test is carried out at joint centre distance basic material equidistance place.Hardness measurement value HV1 is according to ASTM E92-82 (Standard test method for Vickers Hardness ofMetallic Materials) and EN ISO 6507-1 (Metallic materials-Vickershardness test-Part1:Test method (ISO 6507-1:1997)) and implement, and the contrast between the joint of BNi-5 and the iron-based material (56%Fe, 17%Cr, 12%Ni, 12%Si and 1%B by weight) is performed.The result is summarized in table 4 li.
Table 4
| The joint (HV1) of BNi-5 preparation | The joint (HV1) of iron-based material preparation |
| 490 | 260 |
| 600 | 210 |
| 520 | 280 |
| 480 | 270 |
The hardness test result shows that the BNi-5 joint is harder than iron-based material joint.Therefore, according to the present invention, the BNi-5 joint has shown littler ductility and corresponding beguine according to the lower intensity of iron-based filler of the present invention, and this is that hardness number by lower iron-based filler joint shows.Therefore, the BNi-5 joint is more crisp than iron-based filler joint.
Embodiment 5
Hardness test is implemented on the large-scale joint of iron-based gland sealed that contains 56%Fe, 17%Cr, 12%Ni, 12%Si and 1%B by weight.Test is implemented at the brazed joint place of sealing greater than the gap of 1000 μ m, and the position of testing is illustrated in Fig. 3, but the photo of Fig. 3 is not the photo of this embodiment joint.The result is 349HV1,336HV1, and 210HV1,197HV1,250HV1,300HV1 and 287HV1, these results' average hardness is 275HV1.
Embodiment 6
At present embodiment, test the heat exchanger that does not have leakage with preparation,, this heat exchanger is not had the defective joint by complete brazing yet.The iron-based filler of definition is applied between the compressive plate in WO 02/38327.In each experiment, 20 blocks of plates are used.The approximate size of plate is: wide 400mm, wide 1000mm and thick 0.4mm.Plate is placed on the fixture, at the top of plate, places the fixture of constant weight.The plate sub-assembly is heated on vacuum drying oven.Some groups of brazing tests are carried out with the heat exchanger encapsulation, and implement test in the cycle in different heat treatment.
In the check of all heat treatment cycle, the heat exchanger plate sub-assembly at first is heated to 500 ℃ and reaches 1 hour, and temperature is enhanced 1100 ℃ and reaches four hours to guarantee the heating of whole plate sub-assembly then.
Test A: stove is heated to 1200 ℃ from 1100 ℃ and continues 5 minutes, and temperature is lowered to 1100 ℃ and continues about 30 minutes then.
Test b: stove is heated to 1200 ℃ from 1100 ℃ and continues 15 minutes, and temperature is lowered to 1100 ℃ and continues about 30 minutes then.
Test C: stove is heated to 1200 ℃ from 1100 ℃ and continues 30 minutes, and temperature is lowered to 1100 ℃ and continues about 30 minutes then.
Test D: stove is heated to 1200 ℃ from 1100 ℃ and continues 60 minutes, and temperature is lowered to 1100 ℃ and continues about 30 minutes then.
Analyze: whether the plate sub-assembly is cut into piece and melts with the iron-based filler of analyzing at plate sub-assembly middle body.The position of test is through optical research.
The result:
Test A: the filler at center is fusing not.
Test b: the filler at center is fusing not.
Test C: center filler partial melting (more sintering).
Test D: the filler fusing at center.
Claims (34)
1. the method for a brazing articles of stainless steel comprises:
(i) the iron based braze filler material is applied to parts of stainless steel;
(ii) assembling parts randomly;
(iii) in non-oxidizing atmosphere, reducing atmosphere, vacuum or their combinations, heating at least 1000 ℃, and was heated these parts at least 15 minutes at least 1000 ℃ temperature from step (i) or parts (ii);
The goods of the brazed area average hardness of gained less than 600HV1 (iv) are provided; With
(v) randomly repeating step (i), step (ii) with step (iii) one the step or multistep.
2. the method for a brazing articles of stainless steel comprises:
(i) the iron based braze filler material is applied to parts of stainless steel;
(ii) assembling parts randomly;
(iii) in non-oxidizing atmosphere, reducing atmosphere, vacuum or their combinations; Heating at least 1000 ℃, and was heated these parts at least 15 minutes at least 1000 ℃ temperature from step (i) or parts (ii);
(iv) sealing or filling are greater than joint, hole, gap, crackle or the crack of 76 μ m; With
(v) randomly repeating step (i), step (ii) with step (iii) one the step or multistep.
3. according to the method for claim 1 or 2, wherein, step (v) comprises repeating step (i), and the iron based braze filler material is applied to one or more additional parts or goods; And step (ii) in assembling from parts or goods and the one or more additional parts or the goods of repeating step (i); And repeating step (iii) with step (iv).
4. according to the method for above-mentioned arbitrary claim, wherein, the iron based braze filler material of step (i) obtains by gas atomization, water atomization, ingot bar crushing, mechanicalness alloying or melt spin coating.
5. according to the method for above-mentioned arbitrary claim, wherein, step (i) also comprises as powder or pastel or the combination of the two and applies the iron based braze filler material.
6. according to the method for claim 5, wherein, step (i) also comprises the iron based braze filler material that applies strand form or droplet-like, perhaps applies this iron based braze filler material under capillary force disruptor auxiliary.
7. according to the method for claim 6, wherein, the capillary force disruptor on parts or the goods is the form of groove, route, path, path, v type or u type guide rail, track, net or above combination.
8. according to the method for above-mentioned arbitrary claim, wherein, step (iii) also comprises: in inert gas, protection gas or their combination, be heated at least 1000 ℃ temperature.
9. according to the method for above-mentioned arbitrary claim, wherein, step (iii) also comprises: under the situation that one or more gases in being selected from the group of being made up of helium, argon, nitrogen, hydrogen, carbon dioxide exist, be heated at least 1000 ℃ temperature.
10. according to the method for above-mentioned arbitrary claim, wherein, step (iii) also comprises: the temperature that is heated at least 1100 ℃.
11. according to the method for above-mentioned arbitrary claim, wherein, step (iii) also comprises: the temperature that is heated at least 1150 ℃.
12. according to the method for above-mentioned arbitrary claim, wherein, parts are heated at least 30 minutes in step temperature (iii).
13. according to the method for above-mentioned arbitrary claim, wherein, parts are heated at least 45 minutes in step temperature (iii).
14. method according to above-mentioned arbitrary claim, wherein, step (iv) comprises sealing or fills greater than hole, crackle, gap, joint or the crack of 250 μ m or their combination, and be provided at the center line of brazed area or near record it average hardness less than the brazed area of 350HV1.
15. according to each method of claim 1-13, wherein, step (iv) seals or fills greater than hole, crackle, joint, gap or the crack of 300 μ m or their combination, and be provided at through fill greater than the crack brazed area center line of 250 μ m or near measure it average hardness brazed area less than 350HV1.
16. according to each method of claim 1-13, wherein, step (iv) comprises sealing or fills greater than hole, crackle, gap, joint or the crack of 350 μ m or their combination, and be provided at through fill greater than the brazed area center line in the crack of 300 μ m or near measure it average hardness brazed area less than 350HV1.
17. according to each method of claim 1-13, wherein, step (iv) comprises sealing or fills greater than hole, crackle, joint or the crack of 500 μ m or their combination, and be provided at through fill greater than the brazed area center line in the crack of 400 μ m or near measure it average hardness brazed area less than 390HV1.
18. according to the method for above-mentioned arbitrary claim, wherein, the iron based braze filler material contains one or more of Si, B, P, Mn, C or Hf.
19. method according to claim 18, wherein, the iron based braze filler material contains the Cr of 9-30wt%, the Ni of 5-25wt%, and at least a among the Hf of the C of the Mn of the P of the B of the Si of 0-25%, 0-6wt%, 0-15wt%, 0-8wt%, 0-2wt% and 0-15wt%.
20. according to the method for claim 19, wherein, the iron based braze filler material comprises the Fe of 40wt% at least, the Si of the Cr of 14-21wt%, the Ni of 5-21wt%, 6-15wt% and the B of 0.2-1.5wt%.
21. according to the method for claim 19, wherein, the iron based braze filler material comprises the Fe of 40wt% at least, the Si of the Cr of 14-21wt%, the Ni of 5-21wt%, 4-9wt% and the P of 4-9wt%.
22. according to the method for claim 19, wherein, the iron based braze filler material comprises the Fe of 40wt% at least, the P of the Cr of 14-21wt%, the Ni of 5-21wt%, 7-15wt%.
23. a stainless steel products, the method any by claim 1-22 obtains.
24. stainless steel brazing goods comprise at least a stainless steel base material and iron based braze filler material, wherein, the brazed area of obtaining, hole, crackle, gap, joint or crack have 110N/mm at least
2Tensile strength.
25. stainless steel brazing goods comprise at least a stainless steel base material and iron based braze filler material, wherein, the brazed area of obtaining, hole, crackle, gap, joint or crack have the average hardness less than 600HV1.
26. according to claim 23,24 or 25 stainless steel products, wherein, parts that step is obtained in (iv) or goods are selected from reactor, separator, post, heat exchanger or are used for the chemical plant or food factory or be used for the equipment of auto industry.
27. according to each stainless steel products among the claim 24-26, wherein, these goods are the heat exchanger plate of brazing, the reactor sheet of brazing or their combination.
28. according to the stainless steel products of claim 27, wherein, these goods have the burst pressure of 60Bar at least.
29. according to the stainless steel products of claim 28, wherein, these goods have the burst pressure of 80Bar at least.
30. according to each goods among the claim 23-28, wherein, these goods are that the heat exchanger plate area is greater than 0.20m
2, burst pressure is the 0.003m at least of 65Bar, duct area at least
2Heat exchanger.
31. according to each stainless steel products of claim 23-30, wherein, brazed area, hole, crackle, gap, joint or crack have the silicone content of the Si of 2wt% at least.
32. according to each stainless steel products of claim 23-31, wherein, brazed area, hole, crackle, gap, joint or crack have 120N/mm at least
2Tensile strength.
33. according to each stainless steel products among the claim 23-32, wherein, these goods are the plate sub-assemblies with at least three heat exchanger plates that are brazed together in a braze cycle, have following steps:
(i) apply the iron based braze filler material to stainless heat exchanger plate;
(ii) heat exchanger plate is assembled into the plate sub-assembly;
(iii) the heating plate sub-assembly at least 500 ℃ temperature so that the temperature balance in the plate sub-assembly, in non-oxidizing atmosphere, reducing atmosphere, vacuum or their combination, improve temperature then at least 1000 ℃, and make the plate sub-assembly be brazed to together at least 1000 ℃ of maintenances at least 15 minutes; With
The goods of gained brazed area average hardness less than 600HV1 (iv) are provided.
34. according to the stainless steel products of claim 33, wherein, goods are to have according to following steps a braze cycle to be brazed into together the heat exchanger more than the plate sub-assembly of 9 layers of heat exchanger plate:
(i) apply the iron based braze filler material to stainless heat exchanger plate;
(ii) heat exchanger plate is assembled into the plate sub-assembly;
(iii) the heating plate sub-assembly at least 1000 ℃ temperature so that the temperature balance in the plate sub-assembly, in non-oxidizing atmosphere, reducing atmosphere, vacuum or their combination, improve temperature then at least 1150 ℃, and make the plate sub-assembly keep at least 15 minutes and be brazed to together at least 1150 ℃ temperature
The goods of gained brazed area average hardness less than 600HV1 (iv) are provided.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0501198A SE531092C2 (en) | 2005-05-26 | 2005-05-26 | Method for joining two surfaces together and a device comprising two jointed surfaces |
| SE0501199-4 | 2005-05-26 | ||
| SE0501199A SE529913C2 (en) | 2005-05-26 | 2005-05-26 | Brazing articles of stainless steel, e.g. large heat exchanger involves applying an iron-based brazing filler material to parts of stainless steel, heating the parts, and providing brazed areas with specific average hardness |
| SE0501198-6 | 2005-05-26 | ||
| SE05011986 | 2005-05-26 | ||
| SE05011994 | 2005-05-26 | ||
| PCT/SE2006/000618 WO2006126953A1 (en) | 2005-05-26 | 2006-05-24 | A method of brazing articles of stainless steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101184578A true CN101184578A (en) | 2008-05-21 |
| CN101184578B CN101184578B (en) | 2010-06-16 |
Family
ID=37569279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800183684A Ceased CN101184578B (en) | 2005-05-26 | 2006-05-24 | A method of brazing articles of stainless steel and stainless steel welded products obtained by the method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101184578B (en) |
| SE (1) | SE529913C2 (en) |
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| CN102401607A (en) * | 2011-06-27 | 2012-04-04 | 苏州方暨圆节能科技有限公司 | Stainless steel material of heat exchanger stainless steel tube |
| CN102725097A (en) * | 2009-11-26 | 2012-10-10 | 山阳特殊制钢株式会社 | Ni-Fe-based alloy brazing filler material |
| CN104203488A (en) * | 2012-03-28 | 2014-12-10 | 阿尔法拉瓦尔股份有限公司 | A braze alloy layered product |
| CN105555452A (en) * | 2013-09-26 | 2016-05-04 | 阿尔法拉瓦尔股份有限公司 | Method for joining metal parts |
| CN105658365A (en) * | 2013-09-26 | 2016-06-08 | 阿尔法拉瓦尔股份有限公司 | A novel brazing concept |
| CN107809055A (en) * | 2017-12-14 | 2018-03-16 | 长春理工大学 | A kind of high-power semiconductor laser chip welding and assembling method |
| CN112621017A (en) * | 2020-12-09 | 2021-04-09 | 广东澳森热交换系统有限公司 | Brass solder and brazing process for welding carbon steel and red copper by using same |
| CN113547193A (en) * | 2021-08-06 | 2021-10-26 | 贵州电网有限责任公司 | Solid-state welding method and device for weather-resistant steel section |
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| KR102277174B1 (en) | 2013-10-29 | 2021-07-14 | 스웹 인터네셔널 에이비이 | A method of brazing a plate heat exchanger using screen printed brazing material; a plate heat exchanger manufactured by such method |
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| US4410604A (en) * | 1981-11-16 | 1983-10-18 | The Garrett Corporation | Iron-based brazing alloy compositions and brazed assemblies with iron based brazing alloys |
| US4516716A (en) * | 1982-11-18 | 1985-05-14 | Gte Products Corporation | Method of brazing with iron-based and hard surfacing alloys |
| SE523855C2 (en) * | 2000-11-10 | 2004-05-25 | Alfa Laval Corp Ab | Iron-based brazing material for joining elm and soldered product made herewith |
| SE524928C2 (en) * | 2001-06-05 | 2004-10-26 | Alfa Laval Corp Ab | Iron-based brazing material for joining elements through brazing and brazed product made herewith |
| US6656292B1 (en) * | 2002-06-13 | 2003-12-02 | Metzlas, Inc. | Iron-chromium base brazing filler metals |
| DE10252577B4 (en) * | 2002-11-12 | 2008-08-07 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method for producing a solder joint by capillary solder flow |
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|---|---|
| CN101184578B (en) | 2010-06-16 |
| SE529913C2 (en) | 2008-01-08 |
| SE0501199L (en) | 2006-11-27 |
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