CN105215574A - A kind of iron-based solder for stainless steel braze welding - Google Patents
A kind of iron-based solder for stainless steel braze welding Download PDFInfo
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- CN105215574A CN105215574A CN201510698656.XA CN201510698656A CN105215574A CN 105215574 A CN105215574 A CN 105215574A CN 201510698656 A CN201510698656 A CN 201510698656A CN 105215574 A CN105215574 A CN 105215574A
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- Prior art keywords
- powder
- iron
- solder
- based solder
- stainless steel
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 229910000679 solder Inorganic materials 0.000 title claims abstract description 61
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 31
- 239000010935 stainless steel Substances 0.000 title claims abstract description 12
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 12
- 238000003466 welding Methods 0.000 title claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 73
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 9
- 239000011888 foil Substances 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 7
- 238000000889 atomisation Methods 0.000 claims description 3
- 150000002505 iron Chemical class 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 22
- 239000010949 copper Substances 0.000 abstract description 14
- 238000005219 brazing Methods 0.000 abstract description 13
- 238000005260 corrosion Methods 0.000 abstract description 9
- 230000007797 corrosion Effects 0.000 abstract description 9
- 229910052802 copper Inorganic materials 0.000 abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052759 nickel Inorganic materials 0.000 abstract description 7
- 239000003921 oil Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000005476 soldering Methods 0.000 abstract description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 abstract description 2
- 230000002378 acidificating effect Effects 0.000 abstract description 2
- 239000012208 gear oil Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 10
- 239000000243 solution Substances 0.000 description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 230000004580 weight loss Effects 0.000 description 5
- 229910052786 argon Inorganic materials 0.000 description 4
- 229910052796 boron Inorganic materials 0.000 description 4
- 238000007654 immersion Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 125000004029 hydroxymethyl group Chemical group [H]OC([H])([H])* 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 235000019580 granularity Nutrition 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 238000007712 rapid solidification Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910017112 Fe—C Inorganic materials 0.000 description 1
- 229910001096 P alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000005088 metallography Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- 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
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0222—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention is a kind of iron-based solder for stainless steel braze welding.In view of traditional nickel-based solder production cost is higher, the copper in fine copper solder easily contacts with the acidic materials in high temperature gear oil and active sulfide, and the problem that corrosion reaction causes oil cooler corrosion failure occurs.The present invention solves the existing problem that iron-based solder melt temperature is high, decay resistance is not strong for soldering stainless steel EGR oil cooler.This solder is by mass percentage: Ni powder 15.0 ~ 25.0, Cr powder 6.0 ~ 17.0, Si powder 2.0 ~ 6.0, Cu powder 1.5 ~ 5.0, P powder 5.0 ~ 10.0, B powder 0 ~ 1.5, Mo powder 1.0 ~ 4.5, the gross mass mark of graphite powder 0 ~ 1.0, B and graphite powder is not less than 0.25, and surplus is iron powder.Solder of the present invention obtains the strong soldered fitting of decay resistance under the brazing temperature of 1050 DEG C, and soldered fitting shear strength reaches 71.2MPa.
Description
Technical field
The present invention is a kind of new iron-based solder for stainless steel braze welding.
Background technology
Cooler for recycled exhaust gas (being called for short EGR) by being cooled in cooler for recycled exhaust gas by a part of waste gas, and is circulated back in cylinder, can effectively reduce nitrogen oxide (NO in the pollutant of motor vehicle exhaust emission
x) and particulate (PM) content, become one of indispensable vitals on automobile.EGR oil cooler needs to have high intensity, higher corrosion resistance and non-oxidizability under special working environment.
During with fine copper solder brazing EGR stainless steel oil cooling machine, the while of lower to vacuum level requirements, can production cost be reduced, when making solder with it, require play movement very little (0 ~ 0.05mm), to the processing of part and matching requirements strict.Copper easily contacts with the acidic materials in high temperature gear oil and active sulfide and corrosion reaction occurs simultaneously, finally causes engine corrosion to lose efficacy.Tradition nickel-based solder used can make soldered fitting have high strength and higher corrosion resistance, but the content due to Ni is high (at least 60%), the cost about 600 yuan of nickel-based solder kilogram, expensive nickel improves the cost of heat exchanger and EGR oil cooling machine.Iron-based solder decay resistance used is at present bad, and most of iron-based solder has higher melt temperature, and too high temperature is by causing growing up of the stainless excessive dissolution of mother metal and mother metal crystal grain, finally causes joint performance to degenerate.
Summary of the invention
The object of the invention is, fine copper solder corrosion failure high for traditional nickel-based solder cost and the high feature of iron-based solder brazing temperature and the iron-based solder of a kind of low melting point provided is provided.Its object mainly solves the existing problem that iron-based solder melt temperature is high, decay resistance is not strong for soldering stainless steel EGR oil cooler
The object of the invention is to be achieved through the following technical solutions:
The present invention puts forward a kind of new iron-based solder for stainless steel braze welding, it is characterized in that: for the iron-based solder of stainless steel braze welding by Ni powder 15.0 ~ 25.0, Cr powder 6.0 ~ 17.0, Si powder 2.0 ~ 6.0, Cu powder 1.5 ~ 5.0, P powder 5.0 ~ 10.0, B powder 0 ~ 1.5, Mo powder 1.0 ~ 4.5, graphite powder 0 ~ 1.0, the gross mass mark of B and graphite powder is not less than 0.25, and surplus is iron powder.
Technical solution of the present invention adds B, C, Mo element.According to Fe-B, Fe-C phasor, add the fusing point that a small amount of B, C significantly can reduce brazing filler metal alloy.And Mo can interact with the element such as the Ni in mother metal, cause the change of the structure of crystal boundary, chemical composition and energy, make grain refinement, improve the mechanical property of wetability, strength of joint and brazed seam.
The chemical composition of this solder and percentage by weight are: Ni powder 15.0 ~ 25.0, Cr powder 6.0 ~ 17.0, Si powder 2.0 ~ 6.0, Cu powder 1.5 ~ 5.0, P powder 5.0 ~ 10.0, B powder 0 ~ 1.5, Mo powder 1.0 ~ 4.5, the gross mass mark of graphite powder 0 ~ 1.0, B and graphite powder is not less than 0.25, and surplus is iron.
The chemical composition of this solder and percentage by weight are: Ni powder 15.0 ~ 25.0, Cr powder 6.0 ~ 17.0, Si powder 2.0 ~ 6.0, Cu powder 1.5 ~ 5.0, P powder 5.0 ~ 10.0, B powder 0 ~ 1.0, Mo powder 1.0 ~ 4.5, the gross mass mark of graphite powder 0 ~ 1.0, B and graphite powder is not less than 0.25, and surplus is iron.
The chemical composition of this solder and percentage by weight are: Ni powder 15.0 ~ 25.0, Cr powder 6.0 ~ 17.0, Si powder 2.0 ~ 6.0, Cu powder 1.5 ~ 5.0, P powder 5.0 ~ 10.0, B powder 0 ~ 1.0, Mo powder 1.0 ~ 3.5, the gross mass mark of graphite powder 0 ~ 1.0, B and graphite powder is not less than 0.25, and surplus is iron.
The chemical composition of this solder and percentage by weight are: Ni powder 15.0 ~ 25.0, Cr powder 6.0 ~ 17.0, Si powder 2.0 ~ 6.0, Cu powder 1.5 ~ 5.0, P powder 5.0 ~ 10.0, B powder 0 ~ 1.0, Mo powder 1.0 ~ 3.5, the gross mass mark of graphite powder 0.25 ~ 1.0, B and graphite powder is not less than 0.25, and surplus is iron.
The type of service of this iron-based solder is paste, atomization alloy powder, pole cold conditions foil shape.
The advantage of technical solution of the present invention is: compared with traditional nickel-based solder, can obviously reduce production cost (iron-based 150-300 unit/kilogram; Ni-based: 600 yuan/kilogram).Overcome the copper corrosion Problem of Failure used caused by fine copper solder.Owing to adding B, C element, solder melt temperature of the present invention is 1050 DEG C, than Sweden
iron-based solder BrazeLetF300 (melt temperature the is 1080 DEG C) melt temperature of company's invention is low.Brazing seam structure is visible at metallography microscope Microscopic observation, and the rich FeCrNi phase of toughness surrounds firmly crisp rich FeCrNiP phase.Due to the effect of Mo element, brazing seam structure's crystallization is even, and the light tone and the dark areas that are mostly herring-bone form are interwoven.71.2MPa is reached with the shear strength of the lap joint structural member of this solder brazing.And during with F300 solder, the shear strength of this structural member is 57.2MPa.After this paste solder soaks 96h in dilution heat of sulfuric acid, percent weight loss is 16.65%, and strip brazing material weightlessness ratio is under equal conditions 0.209%, illustrates that this solder is at 10%H
2sO
4the decay resistance had in solution.
Detailed description of the invention
Below with reference to embodiment, technical solution of the present invention is further described:
Table one gives chemical composition and mass percent composition in 8 embodiments of the present invention and each embodiment.
High-temp solder described in above-described embodiment is by following process route preparation:
(1) select purity for being not less than high-purity Fe, Ni, Cr, Si, Cu, B, P, C, Mo of 99.9% (mass percent), wherein B, P can add with the form of Fe-B, Fe-P alloy, and weigh according to weight proportion:
(2) under argon shield condition, adopt the method for electric arc melting that this alloy melting is become alloy pig.
(3) one of following method is adopted to prepare solder:
A, employing argon gas powder by atomization equipment prepare alloyed powder powder solder;
B, under argon shield condition, pole cold conditions foil Preparation equipment is adopted to prepare chilling state foil solder.For single-roller method rapid solidification, single roller needs to rotate with the high speed of 1000 ~ 10000r/min, and the fusing of solder ingot bar forms liquid rear cooldown rate between 103 ~ 106K/s.
C, by Powdered solder by adding additive rolling, make there is flexible thin ribbon shaped solder.
D, directly make alloy strip steel rolled stock by alloy pig by multiple high temp rolling, process of thermal treatment.
E, adopt electric spark wire cutting method to cut again positive and negative mechanical polishing from alloy pig after use.
F, the mode taking mass ratio as 20:4:1 by alloyed powder, hydroxymethyl element and ethanol add to be made paste solder and directly uses.
In embodiment, No. 1 solder uses the preparation of F method, select the metal powder of 300 order granularities, the method of powder mixing machine is used to mix, adding hydroxymethyl element, ethanol by alloyed powder is that the mode of 20:4:1 adds and makes soldering paste with mass ratio, put into paste solder the side of to be connected, complete stainless steel overlap joint experiment assembling, directly put into VDW-30 multifunctional vacuum diffusion brazier after assembling at 1000 DEG C of insulation 35min, at 1050 DEG C of insulation 30min, cool to room temperature with the furnace.The shear strength testing soldered fitting after brazing tests is 60.6MPa, and the one week rear weight loss of the immersion in 10% sulfuric acid solution is 17.56%.
2, the experimental technique of 3, No. 4 embodiments is as shown in No. 1 embodiment, the shear strength testing soldered fitting after brazing tests reach respectively 63.5MPa, 57.6MPa, 58.8MPa. immersion in 10% (mass percent concentration) sulfuric acid solution after one week weight loss be 18.31%, 16.65%, 17.77%.
In embodiment, No. 5 solders use the preparation of B method: the metal powder selecting 300 order granularities, use the method for powder mixing machine to mix, adopt pole cold conditions foil Preparation equipment to prepare chilling state foil solder under argon shield condition.For single-roller method rapid solidification, single roller needs to rotate with the high speed of 5000r/min, and the fusing of solder ingot bar forms liquid rear cooldown rate between 105K/s.The size foil made being cut into 30mm × 10mm × 3mm is put into 304 corrosion resistant plates and is treated weldment, directly puts into VDW-30 multifunctional vacuum diffusion brazier at 1000 DEG C of insulation 35min, at 1050 DEG C of insulation 30min, cool to room temperature with the furnace after assembling.The shear strength testing soldered fitting after brazing tests is 64.9MPa, and the one week rear weight loss of the immersion in 10% sulfuric acid solution is 0.599%.
6, the experimental technique of 7, No. 8 embodiments is as shown in No. 5 embodiments, the shear strength testing soldered fitting after brazing tests reach respectively 71.2MPa, 69.1MPa, 68.7MPa. immersion in 10% (mass percent concentration) sulfuric acid solution after one week weight loss be 0.209%, 0.284%, 0.304%.
Adopt the solder in the embodiment shown in table one, the mode taking mass ratio as 20:4:1 by alloyed powder, hydroxymethyl element and ethanol respectively adds to make paste solder or make extremely cold foil and uses.
Solder of the present invention obtains the strong soldered fitting of decay resistance under the brazing temperature of 1050 DEG C, and soldered fitting shear strength reaches 71.2MPa.
Claims (5)
1. the iron-based solder for stainless steel braze welding, it is characterized in that: according to mass percentage, the iron-based solder composition for the graphitiferous powder of stainless steel braze welding is Ni powder 15.0 ~ 25.0, Cr powder 6.0 ~ 17.0, Si powder 2.0 ~ 6.0, Cu powder 1.5 ~ 5.0, P powder 5.0 ~ 10.0, B powder 0 ~ 1.5, Mo powder 1.0 ~ 4.5, the gross mass mark of graphite powder 0 ~ 1.0, B and graphite powder is not less than 0.25, and surplus is iron.
2. iron-based solder according to claim 1, it is characterized in that: the chemical composition of this solder and mass percent are: Ni powder 15.0 ~ 25.0, Cr powder 6.0 ~ 17.0, Si powder 2.0 ~ 6.0, Cu powder 1.5 ~ 5.0, P powder 5.0 ~ 10.0, B powder 0 ~ 1.0, Mo powder 1.0 ~ 4.5, graphite powder 0 ~ 1.0, the gross mass mark of B and graphite powder is not less than 0.25, and surplus is iron.
3. iron-based solder according to claim 1, it is characterized in that: the chemical composition of this solder and mass percent are: Ni powder 15.0 ~ 25.0, Cr powder 6.0 ~ 17.0, Si powder 2.0 ~ 6.0, Cu powder 1.5 ~ 5.0, P powder 5.0 ~ 10.0, B powder 0 ~ 1.0, Mo powder 1.0 ~ 3.5, graphite powder 0 ~ 1.0, the gross mass mark of B and graphite powder is not less than 0.25, and surplus is iron.
4. iron-based solder according to claim 1, it is characterized in that: the chemical composition of this solder and mass percent are: Ni powder 15.0 ~ 25.0, Cr powder 6.0 ~ 17.0, Si powder 2.0 ~ 6.0, Cu powder 1.5 ~ 5.0, P powder 5.0 ~ 10.0, B powder 0 ~ 1.0, Mo powder 1.0 ~ 3.5, graphite powder 0.25 ~ 1.0, the gross mass mark of B and graphite powder is not less than 0.25, and surplus is iron.
5. iron-based solder according to claim 1, is characterized in that: the type of service of this iron-based solder is paste, atomization alloy powder or pole cold conditions foil shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510698656.XA CN105215574A (en) | 2015-10-25 | 2015-10-25 | A kind of iron-based solder for stainless steel braze welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510698656.XA CN105215574A (en) | 2015-10-25 | 2015-10-25 | A kind of iron-based solder for stainless steel braze welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105215574A true CN105215574A (en) | 2016-01-06 |
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ID=54985021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510698656.XA Pending CN105215574A (en) | 2015-10-25 | 2015-10-25 | A kind of iron-based solder for stainless steel braze welding |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106862799A (en) * | 2017-02-27 | 2017-06-20 | 南通开利浦材料科技有限公司 | The Ni-based foil solder of iron and its application |
| CN114378481A (en) * | 2022-02-11 | 2022-04-22 | 江苏省徐州技师学院 | Nickel-based brazing material and preparation method thereof |
| CN114514087A (en) * | 2019-11-01 | 2022-05-17 | 欧瑞康美科（美国）公司 | Low melting point iron-based brazing filler metals for heat exchanger applications |
-
2015
- 2015-10-25 CN CN201510698656.XA patent/CN105215574A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106862799A (en) * | 2017-02-27 | 2017-06-20 | 南通开利浦材料科技有限公司 | The Ni-based foil solder of iron and its application |
| CN114514087A (en) * | 2019-11-01 | 2022-05-17 | 欧瑞康美科（美国）公司 | Low melting point iron-based brazing filler metals for heat exchanger applications |
| CN114378481A (en) * | 2022-02-11 | 2022-04-22 | 江苏省徐州技师学院 | Nickel-based brazing material and preparation method thereof |
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Application publication date: 20160106 |