CN105598543B - A kind of connection of nickel base superalloy or stainless steel the intermediate layer alloy of siliceous boron and its application - Google Patents
A kind of connection of nickel base superalloy or stainless steel the intermediate layer alloy of siliceous boron and its application Download PDFInfo
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- CN105598543B CN105598543B CN201610179946.8A CN201610179946A CN105598543B CN 105598543 B CN105598543 B CN 105598543B CN 201610179946 A CN201610179946 A CN 201610179946A CN 105598543 B CN105598543 B CN 105598543B
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- 239000000956 alloy Substances 0.000 title claims abstract description 81
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 74
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 33
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 229910052796 boron Inorganic materials 0.000 title claims abstract description 24
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 20
- 239000010935 stainless steel Substances 0.000 title claims abstract description 17
- 229910001067 superalloy steel Inorganic materials 0.000 title claims abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 239000011651 chromium Substances 0.000 claims abstract description 18
- 239000000203 mixture Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 16
- 230000001052 transient effect Effects 0.000 claims abstract description 16
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 14
- 239000010703 silicon Substances 0.000 claims abstract description 14
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 12
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 12
- 239000010937 tungsten Substances 0.000 claims abstract description 12
- 229910052742 iron Inorganic materials 0.000 claims abstract description 11
- 239000011888 foil Substances 0.000 claims abstract description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 13
- 229910000601 superalloy Inorganic materials 0.000 claims description 5
- 229910000521 B alloy Inorganic materials 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical group [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- -1 weight percentage Substances 0.000 claims description 2
- 229910000990 Ni alloy Inorganic materials 0.000 claims 1
- 229910000851 Alloy steel Inorganic materials 0.000 abstract description 5
- 238000003466 welding Methods 0.000 description 25
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 238000005219 brazing Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 244000137852 Petrea volubilis Species 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 230000008018 melting Effects 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 239000000945 filler Substances 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- 229910001092 metal group alloy Inorganic materials 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 238000005275 alloying Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- QDWJUBJKEHXSMT-UHFFFAOYSA-N boranylidynenickel Chemical compound [Ni]#B QDWJUBJKEHXSMT-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005280 amorphization Methods 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/008—Soldering within a furnace
-
- 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
- B23K1/19—Soldering, e.g. brazing, or unsoldering taking account of the properties of the materials to be soldered
-
- 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
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
-
- 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
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
- B23K1/206—Cleaning
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/18—Dissimilar materials
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a kind of nickel base superalloy or stainless steel connection the intermediate layer alloy of siliceous boron and its application, belong to high temperature alloy and stainless steel interconnection technique field.Weight percentage, the intermediate layer alloy composition are:Boron:2~3.5%;Silicon:1~3%;Tungsten:4~10%;Chromium:10~15%;Iron:3~6%;Nickel is surplus;The intermediate layer alloy is the Non Crystalline Foil band prepared using getting rid of with method, and it is used for the partial transient liquid of nickel base superalloy or stainless steel at 1050~1250 DEG C, and the time used is 100~240 minutes.
Description
Technical field
The present invention relates to high temperature alloy and stainless steel interconnection technique field, and in particular to a kind of nickel base superalloy is stainless
Steel connection the intermediate layer alloy of siliceous boron and its application, the intermediate layer alloy are applied to the company of nickel base superalloy or stainless steel
Connect.
Background technology
High temperature alloy and stainless steel material are largely used in modern industrial production, in the application process of these materials,
Not only to consider prepared by the intensity of material in itself etc., while also tend to need the Welding Problems for solving these materials.But by
It is higher in the alloying level of high temperature alloy and stainless steel material, often containing more alloying element, cause these materials
Welding performance extreme difference, the tendentiousness that hot and cold crackle is welded in generation is higher, has had a strong impact on the normal use of component.At present, Gao He
The method that the welding of aurification alloy often uses vacuum brazing.The design of brazing material is the key of soldering.
The solder used at present is all powder brazing alloy, and this solder must mix with a certain amount of binding agent when in use,
To realize its shaping, but due to there is the volatilization of binding agent, it is difficult to the defects of avoiding that stomata can be formed in weld seam;Brazing filler metal alloy
Another forming method is to get rid of the Non Crystalline Foil band prepared with method, but this method requires higher, complicated body to alloy Composition Control
The alloy of system is difficult the amorphous ribbon for molding regular shape.In addition, the element such as boron, silicon and phosphorus of high level in current solder,
Also weld strength has been had a strong impact on.
With the application of nickel base single crystal high-temperature alloy material, relative process technology also increasingly causes weight
Depending on especially Welding Problems of single crystal alloy.Due to nickel-base high-temperature single crystal alloy contain substantial amounts of alloying element, especially aluminium,
Titanium etc. so that the melting welding poor performance of this kind of alloy, easily produce cold and hot crackle, therefore this kind of alloy mainly uses transient liquid phase
The method of connection is welded.
TLP diffusion bonding (TLP) method requires high to the brazing filler metal alloy of use, if the composition of brazing filler metal alloy
Design unreasonable, on the one hand can cause to connect that temperature is very high (usually more than 1280 DEG C), and this easily causes mother metal eutectic phase to occur
Liquefaction, influences the materials'use life-span;On the other hand, common brazing filler metal alloy complicated component, cause the Connection Time very long (generally super
Cross 48h), production efficiency is extremely low, seriously constrains the popularization and application of partial transient liquid technology.
The content of the invention
In order to solve the problems such as gas hole defect, low intensity existing for the powder brazing alloy alloy used at present, the present invention provides
A kind of connection of nickel base superalloy or stainless steel the intermediate layer alloy of siliceous boron and its application, the intermediate layer alloy is used for Ni-based
The high-quality connection of the high efficiency of high temperature alloy or stainless steel.
To achieve the above object, the technical solution adopted in the present invention is as follows:
A kind of nickel base superalloy or stainless steel connection intermediate layer alloy of siliceous boron, the intermediate layer alloy is Ni-based conjunction
Gold, weight percentage, alloy composition are:Boron 2~3.5%, silicon 1~3%, tungsten 4~10%, chromium 10~15%,
Iron 3~6%, nickel are surplus.
The intermediate layer alloy is amorphous foil banding, is prepared using band method is got rid of;The centre of the foil shape is laminated
Its golden width is 25~55mm, and thickness is 35~55 μm.
The intermediate layer alloy is applied to the connection of nickel base superalloy or stainless steel, and connected mode is partial transient liquid
(transient liquid phase bonding).
The intermediate layer alloy carries out partial transient liquid (transient liquid phase bonding), institute's used time at 1050~1250 DEG C
Between 100~240 minutes.
The principle of the invention is as follows:
In order to solve the problems, such as that the alloy amorphous foil mouldability in the Ni-based intermediate layer of complex system is bad, according to the Ni-based conjunction of liquid
Wet processes feature between gold and solid metal (copper roll), nickel is selected as intermediate layer alloy substrate;In order to reduce moment
Liquid phase connection temperature, reduces intermediate layer alloy melting point, boron and element silicon is selected as drop melting element, in addition, element silicon adds
Enter and also significantly improve liquid metal flow, improve the wetability in preparation process, be advantageous to the amorphization of alloy;For
Raising postwelding performance, chromium, tungsten, ferro element one side solid solution strengthened alloy are added, on the other hand can improve intermediate layer alloy
Crystallized ability and high temperature oxidation resistance.
The beneficial effects of the invention are as follows:
1st, the present invention solves that the design of current high temperature alloy brazing material is unreasonable, formability is bad, postwelding poor performance is asked
Topic, partial transient liquid is carried out to nickel base superalloy and stainless steel using intermediate layer alloy of the present invention, quality of connection is good, side
Method is easy and effective.
2nd, the tensile strength of alloy (joint) reaches mother metal more than 65% after welding.
Brief description of the drawings
Fig. 1 is intermediate layer alloy exterior appearance.
Fig. 2 is intermediate layer alloy material phase analysis result.
Fig. 3 is sample microstructure after embodiment 1 connects.
Fig. 4 is sample tensile property after embodiment 1 connects.
Fig. 5 is sample microstructure after embodiment 2 connects.
Fig. 6 is sample tensile property after embodiment 2 connects.
Fig. 7 is sample microstructure after embodiment 3 connects.
Fig. 8 is sample tensile property after embodiment 3 connects.
Fig. 9 is sample microstructure after embodiment 4 connects.
Figure 10 is sample tensile property after embodiment 4 connects.
Figure 11 is sample microstructure after embodiment 5 connects.
Figure 12 is sample tensile property after embodiment 5 connects.
Figure 13 is sample microstructure after embodiment 6 connects.
Figure 14 is sample tensile property after embodiment 6 connects.
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples.
Intermediate layer alloy of the present invention with the addition of drop melting element boron using nickel as matrix:2~3.5%, silicon:1~3%;Strengthen
Elemental tungsten:4~10%;Iron:3~6%;Anti-oxidizing elements chromium 10~15%.
The intermediate layer alloy preparation method of Non Crystalline Foil banding used is in following examples:By purity more than 99.99%
Pure nickel, chromium, tungsten, silicon, iron and nickel-boron alloy (boron is 18.5wt.% in nickel-boron alloy) are put into vacuum after being prepared in the ratio
Alloy pig is smelted into induction melting furnace.Band method is got rid of using conventional copper roller alloy pig is prepared into Non Crystalline Foil band, amorphous band is wide
It is 35~55 μm to spend for 25~55mm, thickness, and its exterior appearance is as shown in figure 1, analysis result shows that its microstructure is amorphous
(Fig. 2).Partial transient liquid is carried out at 1050~1250 DEG C using this intermediate layer alloy, 30~240 minutes used times can be complete
Into, and occur without mother metal liquefaction phenomenon, there is no corrosion problem.Joint quality of connection is preferable, and intensity is higher.
Embodiment 1
The present embodiment nickel base superalloy is K465, and its chemical composition is:Cr:10-15wt.%;W:5-8wt.%;Si:2
~5wt.%;B:1.5-3.0wt.%;Nickel is surplus.
Intermediate layer alloy composition is:Boron:2%;Silicon:2%;Tungsten:9%;Chromium:12%;Iron:6%;Nickel is surplus.
Alloy bar surface scale is removed, is processed into Φ 16mm × 4mm sample.Using No. 800 sand paper by surface to be welded
Polish and polish, be cleaned by ultrasonic respectively in acetone and alcohol 15 minutes and remove sample surfaces greasy dirt.Intermediate layer alloy is placed
Between two samples to be welded, fixed with fixture, applying stop-off gent in sample outer surface prevents liquid intermediate layer to be lost in.
The sample assembled is placed and carries out partial transient liquid in a vacuum furnace, connection temperature is 1200 DEG C, and the time is
240 minutes, air pressure was not higher than 8 × 10 in stove-2Pa.Welding is furnace-cooled to room temperature after terminating.
Fig. 3 is the microstructure of sample after welding, it is seen then that does not occur liquefaction phenomenon in sample.Fig. 4 is sample after connection
Tensile property test result, it is seen then that the tensile strength of alloy (joint) reaches mother metal more than 65% after welding.
Embodiment 2
The present embodiment nickel base superalloy is K465, and its chemical composition is:Cr:10-15wt.%;W:5-8wt.%;Si:2
~5wt.%;B:1.5-3.0wt.%;Nickel is surplus.
Intermediate layer alloy composition is:Boron:3%;Silicon:2%;Tungsten:9%;Chromium:12%;Iron:6%;Nickel is surplus.
Alloy bar surface scale is removed, is processed into Φ 16mm × 4mm sample.Using No. 800 sand paper by surface to be welded
Polish and polish, be cleaned by ultrasonic respectively in acetone and alcohol 15 minutes and remove sample surfaces greasy dirt.Intermediate layer alloy is placed
Between two samples to be welded, fixed with fixture, applying stop-off gent in sample outer surface prevents liquid intermediate layer to be lost in.
The sample assembled is placed and carries out partial transient liquid in a vacuum furnace, connection temperature is 1150 DEG C, and the time is
210 minutes, air pressure was not higher than 8 × 10 in stove-2Pa.Welding is furnace-cooled to room temperature after terminating.
Fig. 5 is the microstructure of sample after welding, it is seen then that does not occur liquefaction phenomenon in sample.Fig. 6 is sample after connection
Tensile property test result, it is seen then that the tensile strength of alloy (joint) reaches mother metal more than 65% after welding.
Embodiment 3
The present embodiment nickel base superalloy is K465, and its chemical composition is:Cr:10-15wt.%;W:5-8wt.%;Si:2
~5wt.%;B:1.5-3.0wt.%;Nickel is surplus.
Intermediate layer alloy composition is:Boron:2%;Silicon:3%;Tungsten:9%;Chromium:12%;Iron:6%;Nickel is surplus.
Alloy bar surface scale is removed, is processed into Φ 16mm × 4mm sample.Using No. 800 sand paper by surface to be welded
Polish and polish, be cleaned by ultrasonic respectively in acetone and alcohol 15 minutes and remove sample surfaces greasy dirt.Intermediate layer alloy is placed
Between two samples to be welded, fixed with fixture, applying stop-off gent in sample outer surface prevents liquid intermediate layer to be lost in.
The sample assembled is placed and carries out partial transient liquid in a vacuum furnace, connection temperature is 1170 DEG C, and the time is
180 minutes, air pressure was not higher than 8 × 10 in stove-2Pa.Welding is furnace-cooled to room temperature after terminating.
Fig. 7 is the microstructure of sample after welding, it is seen then that does not occur liquefaction phenomenon in sample.Fig. 8 is sample after connection
Tensile property test result, it is seen then that the tensile strength of alloy (joint) reaches mother metal more than 65% after welding.
Embodiment 4
The present embodiment is 304 stainless steels, and its chemical composition is:Cr:15.5~16.5wt.%;Co:8.0~9.0wt.%;
W:5.6~6.4wt.%;Al:3.6~4.2wt.%;Ti:3.6~4.2%;Ta:0.7~1.2wt.%;Nickel is surplus.
Intermediate layer alloy composition is:Boron:2%;Silicon:2%;Tungsten:7%;Chromium:15%;Iron:6%;Nickel is surplus.
Alloy bar surface scale is removed, is processed into Φ 16mm × 4mm sample.Using No. 800 sand paper by surface to be welded
Polish and polish, be cleaned by ultrasonic respectively in acetone and alcohol 15 minutes and remove sample surfaces greasy dirt.Intermediate layer alloy is placed
Between two samples to be welded, fixed with fixture, applying stop-off gent in sample outer surface prevents liquid intermediate layer to be lost in.
The sample assembled is placed and carries out partial transient liquid in a vacuum furnace, connection temperature is 1200 DEG C, and the time is
240 minutes, air pressure was not higher than 8 × 10 in stove-2Pa.Welding is furnace-cooled to room temperature after terminating.
Fig. 9 is the microstructure of sample after welding, it is seen then that does not occur liquefaction phenomenon in sample.Figure 10 is sample after connection
The tensile property test result of product, it is seen then that the tensile strength of alloy (joint) reaches mother metal more than 65% after welding.
Embodiment 5
The present embodiment is 304 stainless steels, and its chemical composition is:Cr:15.5~16.5wt.%;Co:8.0~9.0wt.%;
W:5.6~6.4wt.%;Al:3.6~4.2wt.%;Ti:3.6~4.2%;Ta:0.7~1.2wt.%;Nickel is surplus.
Intermediate layer alloy composition is:Boron:2%;Silicon:2%;Tungsten:10%;Chromium:12%;Iron:6%;Nickel is surplus.
Alloy bar surface scale is removed, is processed into Φ 16mm × 4mm sample.Using No. 800 sand paper by surface to be welded
Polish and polish, be cleaned by ultrasonic respectively in acetone and alcohol 15 minutes and remove sample surfaces greasy dirt.Intermediate layer alloy is placed
Between two samples to be welded, fixed with fixture, applying stop-off gent in sample outer surface prevents liquid intermediate layer alloy to be lost in.
The sample assembled to be placed and welded in a vacuum furnace, welding temperature is 1210 DEG C, and the time is 200 minutes,
Air pressure is not higher than 8 × 10 in stove-2Pa.Welding is furnace-cooled to room temperature after terminating.
Figure 11 is the microstructure of sample after welding, it is seen then that does not occur liquefaction phenomenon in sample.Figure 12 is sample after connection
The tensile property test result of product, it is seen then that the tensile strength of alloy (joint) reaches mother metal more than 65% after welding.
Embodiment 6
The present embodiment is 304 stainless steels, and its chemical composition is:Cr:15.5~16.5wt.%;Co:8.0~9.0wt.%;
W:5.6~6.4wt.%;Al:3.6~4.2wt.%;Ti:3.6~4.2%;Ta:0.7~1.2wt.%;Nickel is surplus.
Intermediate layer alloy composition is:Boron:2%;Silicon:2%;Tungsten:10%;Chromium:15%;Iron:4.5%;Nickel is surplus.
Alloy bar surface scale is removed, is processed into Φ 16mm × 4mm sample.Using No. 800 sand paper by surface to be welded
Polish and polish, be cleaned by ultrasonic respectively in acetone and alcohol 15 minutes and remove sample surfaces greasy dirt.Intermediate layer alloy is placed
Between two samples to be welded, fixed with fixture, applying stop-off gent in sample outer surface prevents liquid solder to be lost in.
The sample assembled is placed and carries out partial transient liquid in a vacuum furnace, connection temperature is 1210 DEG C, and the time is
180 minutes, air pressure was not higher than 8 × 10 in stove-2Pa.Welding is furnace-cooled to room temperature after terminating.
Figure 13 is the microstructure of sample after welding, it is seen then that does not occur liquefaction phenomenon in sample.Figure 14 is sample after connection
The tensile property test result of product, it is seen then that the tensile strength of alloy (joint) reaches mother metal more than 65% after welding.
Claims (5)
- A kind of 1. intermediate layer alloy of nickel base superalloy or the siliceous boron of stainless steel connection, it is characterised in that:The centre is laminated Gold is nickel-base alloy, weight percentage, and alloy composition is:Boron 2~3.5%, silicon 1~3%, tungsten 4~10%, chromium 10~15%, iron 3~6%, nickel is surplus.
- 2. the intermediate layer alloy of siliceous boron according to claim 1, it is characterised in that:The intermediate layer alloy is amorphous state Foil shape, prepared using band method is got rid of.
- 3. the intermediate layer alloy of siliceous boron according to claim 2, it is characterised in that:The intermediate layer alloy of the foil shape Its width is 25~55mm, and thickness is 35~55 μm.
- 4. the application of the intermediate layer alloy of siliceous boron according to claim 1, it is characterised in that:The intermediate layer of the siliceous boron Alloy is used for the connection of nickel base superalloy or stainless steel, and connected mode is partial transient liquid.
- 5. the application of the intermediate layer alloy of siliceous boron according to claim 4, it is characterised in that:The intermediate layer alloy exists 1050~1250 DEG C of progress partial transient liquids, time used are 100~240 minutes.
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