CN100471613C - Silver solder of containing gallium, indium, and rare earth silicon and neodymium without cadmium - Google Patents
Silver solder of containing gallium, indium, and rare earth silicon and neodymium without cadmium Download PDFInfo
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- CN100471613C CN100471613C CNB2007100685653A CN200710068565A CN100471613C CN 100471613 C CN100471613 C CN 100471613C CN B2007100685653 A CNB2007100685653 A CN B2007100685653A CN 200710068565 A CN200710068565 A CN 200710068565A CN 100471613 C CN100471613 C CN 100471613C
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- indium
- cadmium
- silicon
- neodymium
- gallium
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- 229910052733 gallium Inorganic materials 0.000 title claims abstract description 48
- 229910052738 indium Inorganic materials 0.000 title claims abstract description 48
- 229910052779 Neodymium Inorganic materials 0.000 title claims abstract description 47
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 45
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 title claims description 46
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 title claims description 46
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 title claims description 45
- 239000010703 silicon Substances 0.000 title claims description 43
- 229910052761 rare earth metal Inorganic materials 0.000 title claims description 27
- 150000002910 rare earth metals Chemical class 0.000 title claims description 27
- 229910000679 solder Inorganic materials 0.000 title abstract description 10
- 229910052793 cadmium Inorganic materials 0.000 title description 8
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 title description 8
- 229910052709 silver Inorganic materials 0.000 claims abstract description 49
- 229910052718 tin Inorganic materials 0.000 claims abstract description 20
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 229910052725 zinc Inorganic materials 0.000 claims abstract 2
- 238000005219 brazing Methods 0.000 claims description 51
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 48
- 239000004332 silver Substances 0.000 claims description 48
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 42
- 229910045601 alloy Inorganic materials 0.000 claims description 42
- 239000000956 alloy Substances 0.000 claims description 42
- 239000010949 copper Substances 0.000 claims description 20
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims 1
- 238000005266 casting Methods 0.000 abstract description 10
- 238000003723 Smelting Methods 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 description 25
- 239000002184 metal Substances 0.000 description 25
- 238000005476 soldering Methods 0.000 description 19
- 230000004907 flux Effects 0.000 description 16
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 15
- 229910000906 Bronze Inorganic materials 0.000 description 14
- 239000010974 bronze Substances 0.000 description 14
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 14
- 239000000463 material Substances 0.000 description 9
- 229910001369 Brass Inorganic materials 0.000 description 7
- 229910000975 Carbon steel Inorganic materials 0.000 description 7
- 239000010951 brass Substances 0.000 description 7
- 239000010962 carbon steel Substances 0.000 description 7
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910000676 Si alloy Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- 229910017518 Cu Zn Inorganic materials 0.000 description 1
- 229910017752 Cu-Zn Inorganic materials 0.000 description 1
- 229910017943 Cu—Zn Inorganic materials 0.000 description 1
- 241001417490 Sillaginidae Species 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- NZWXMOTXTNDNLK-UHFFFAOYSA-N [Cu].[Zn].[Ag] Chemical compound [Cu].[Zn].[Ag] NZWXMOTXTNDNLK-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000002305 electric material Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
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Abstract
A non-Cd Ag solder containing Ga, In, Nd and Si is proportionally prepared from Cu, Zn, Sn, Ga, In, Nd, Si and Ag through smelting, casting or horizontal conticasting, extruding and drawing to obtain Ag solder wire.
Description
Technical field
The invention belongs to the welding material class, be specifically related to a kind of cadmium-free silver brazing alloy that contains gallium, indium, silicon and rare earth neodymium.
Background technology
At present, the welding filler metal that uses in welding process is generally and contains cadmium brazing silver alloy BAg40CuZnCd and BAg50CuZnCd both at home and abroad, all contains a large amount of " poisonous element " cadmiums (Cd) in its chemical composition.Owing to contain the toxicity of cadmium solder, all begin to forbid this be in the application in the electric material of cadmium material that contains both at home and abroad.Yet the substitute products that do not contain cadmium that also do not have a kind of suitable superior performance in the market.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, provide a kind of welding position in brazing process and after the soldering not have the cadmium-free silver brazing alloy that contains gallium, indium, silicon and rare earth neodymium poisonous element cadmium, good, the alternative BAg40CuZnCd of brazing property and BAg50CuZnCd fully.
In order to achieve the above object, technical scheme of the present invention is: a kind of cadmium-free silver brazing alloy that contains gallium, indium, silicon and rare earth neodymium, chemical composition (mass percent) is 25.0%～35.0% copper (Cu), 20.0%～30.0% zinc (Zn), 0.01%～1.0% tin (Sn), 0.001%～5.0% gallium (Ga), 0.001%～4.5% indium (In), 0.002%～0.5% silicon (Si), 0.001%～0.10% neodymium (Nd), all the other are silver (Ag).
The present invention adopts commercially available silver, cathode copper, zinc ingot metal, tin slab, gallium, indium metal, silica flour, neodymium metal, proportioning on demand, adopt the conventional smelting of intermediate frequency smelting furnace, casting or adopt the horizontal casting mode to obtain casting rod (ingot casting), to cast rod (ingot casting) then by extruding, drawing, promptly obtain needed solder wire material; The present invention also can smelt into alloy respectively in advance with tin slab, gallium, indium metal, silicon, neodymium metal according to producing needs, adds then in silver-copper-zinc alloy and smelts, casts, and by extruding, drawing, promptly obtains needed solder wire material again.
The cadmium-free silver brazing alloy solidus temperature that contains gallium, indium, silicon and rare earth neodymium of the present invention at 630 ℃～650 ℃ scopes, liquidus temperature in 690 ℃～715 ℃ scopes (having considered experimental error).Cooperate FB102 (QJ102) brazing flux, brazing material is following combination: when red copper-brass, brass-carbon steel, stainless steel-nickel-base alloy, the mechanical property of soldered fitting is respectively at σ
b=190～380MPa scope, τ=190～320MPa scope.
The present invention has mainly solved following two key technical problems: 1) develop silver solder no cadmium, alternative BAg40CuZnCd and BAg50CuZnCd, by optimizing the chemical composition of " cadmium-free silver brazing alloy that contains gallium, indium, silicon and rare earth neodymium ", obtain mother metal wetability, good, the brazed seam mechanical property (σ of spreadability
b, τ) good cadmium-free silver brazing alloy; 2) in cadmium-free silver brazing alloy, add an amount of tin (Sn), gallium (Ga), indium (In) to reduce the fusing point of principal component alloy (Ag-Cu-Zn alloy), add an amount of silicon (Si) simultaneously and can improve the wetability of cadmium-free silver brazing alloy on red copper, brass, carbon steel, stainless steel and nickel-base alloy; Add the crystal grain of rear earth element nd (Nd), improve the plasticity and the comprehensive mechanical property of cadmium-free silver brazing alloy with the refinement cadmium-free silver brazing alloy.
The present invention adopts conventional intermediate frequency smelting furnace to smelt, cast or adopts the horizontal casting mode to obtain casting rod (ingot casting), will cast rod (ingot casting) then and pass through extruding, drawing, promptly obtains needed solder wire material; The cadmium-free silver brazing alloy that contains gallium, indium, silicon and rare earth neodymium of the present invention is an object of reference with BAg40CuZnCd and BAg50CuZnCd, cooperate the FB102/QJ102 brazing flux, during combinations of materials such as soldering red copper-brass, brass-carbon steel, stainless steel-nickel-base alloy, wetability, spreadability to mother metal are suitable with it, the suitable with it (σ of brazed seam mechanical property
b=190～380MPa scope, τ=190～320MPa scope); The cadmium-free silver brazing alloy that contains gallium, indium, silicon and rare earth neodymium of the present invention does not have the harmful element cadmium fully, has protected operator's health safety effectively, has eliminated the pollution to environment; Solder of the present invention can be used as the substitute of BAg40CuZnCd and BAg50CuZnCd solder and applies at the refrigeration part production industry.
The specific embodiment
According to the quality recipe ratio of " cadmium-free silver brazing alloy that contains gallium, indium, silicon and rare earth neodymium " of the present invention, the narration specific embodiments of the invention.
Embodiment 1
Press the mass percent proportioning, its composition is: 25.0% bronze medal (Cu), and 30.0% zinc (Zn), 1.0% tin (Sn), 5.0% gallium (Ga), 4.5% indium (In), 0.5% silicon (Si), 0.10% neodymium (Nd), all the other are silver (Ag).
" cadmium-free silver brazing alloy that contains gallium, indium, silicon and rare earth neodymium " solidus temperature that the mentioned component proportioning obtains about 630 ℃, liquidus temperature (considered experimental error) about 690 ℃, cooperate FB102 (QJ102) brazing flux, the brazed seam intensity when the soldering mother metal is following the combination is seen data in the bracket: red copper-brass (σ
b=190 ± 15MPa, τ=190 ± 10MPa), brass-carbon steel (σ
b=260 ± 15MPa, τ=200 ± 10MPa), stainless steel-nickel-base alloy (σ
b=360 ± 20MPa, τ=310 ± 20MPa).
Embodiment 2
Press the mass percent proportioning, its composition is: 35.0% bronze medal (Cu), and 20.0% zinc (Zn), 0.01% tin (Sn), 0.001% gallium (Ga), 0.001% indium (In), 0.002% silicon (Si), 0.001% neodymium (Nd), all the other are silver (Ag).
" cadmium-free silver brazing alloy that contains gallium, indium, silicon and rare earth neodymium " solidus temperature that the mentioned component proportioning obtains about 650 ℃, liquidus temperature (considered experimental error) about 715 ℃, cooperate FB102 (QJ102) brazing flux, the brazed seam intensity when the soldering mother metal is following the combination is seen data in the bracket: red copper-brass (σ
b=190 ± 15MPa, τ=190 ± 10MPa), brass-carbon steel (σ
b=260 ± 15MPa, τ=200 ± 10MPa), stainless steel-nickel-base alloy (σ
b=360 ± 20MPa, τ=310 ± 20MPa).
Embodiment 3
Press the mass percent proportioning, its composition is: 30.0% bronze medal (Cu), and 25.0% zinc (Zn), 0.01% tin (Sn), 0.05% gallium (Ga), 0.001% indium (In), 0.2% silicon (Si), 0.01% neodymium (Nd), all the other are silver (Ag).
" cadmium-free silver brazing alloy that contains gallium, indium, silicon and rare earth neodymium " solidus temperature that the mentioned component proportioning obtains about 650 ℃, liquidus temperature (considered experimental error) about 705 ℃, cooperate FB102 (QJ102) brazing flux, soldering is identical with embodiment 1 with mother metal and brazed seam intensity data.
Embodiment 4
Press the mass percent proportioning, its composition is: 30.0% bronze medal (Cu), and 25.0% zinc (Zn), 1.0% tin (Sn), 2.0% gallium (Ga), 1.0% indium (In), 0.1% silicon (Si), 0.03% neodymium (Nd), all the other are silver (Ag).
" cadmium-free silver brazing alloy that contains gallium, indium, silicon and rare earth neodymium " solidus temperature that the mentioned component proportioning obtains about 640 ℃, liquidus temperature (considered experimental error) about 700 ℃, cooperate FB102 (QJ102) brazing flux, soldering is identical with embodiment 1 with mother metal and brazed seam intensity data.
Embodiment 5
Press the mass percent proportioning, its composition is: 28.0% bronze medal (Cu), and 28.0% zinc (Zn), 0.5% tin (Sn), 1.5% gallium (Ga), 0.1% indium (In), 0.05% silicon (Si), 0.01% neodymium (Nd), all the other are silver (Ag).
" cadmium-free silver brazing alloy that contains gallium, indium, silicon and rare earth neodymium " solidus temperature that the mentioned component proportioning obtains about 645 ℃, liquidus temperature (considered experimental error) about 705 ℃, cooperate FB102 (QJ102) brazing flux, soldering is identical with embodiment 1 with mother metal and brazed seam intensity data.
Embodiment 6
Press the mass percent proportioning, its composition is: 32.0% bronze medal (Cu), and 26.0% zinc (Zn), 0.2% tin (Sn), 1.5% gallium (Ga), 0.01% indium (In), 0.05% silicon (Si), 0.005% neodymium (Nd), all the other are silver (Ag).
" cadmium-free silver brazing alloy that contains gallium, indium, silicon and rare earth neodymium " solidus temperature that the mentioned component proportioning obtains about 645 ℃, liquidus temperature (considered experimental error) about 710 ℃, cooperate FB102 (QJ102) brazing flux, soldering is identical with embodiment 1 with mother metal and brazed seam intensity data.
Embodiment 7
Press the mass percent proportioning, its composition is: 27.0% bronze medal (Cu), and 29.0% zinc (Zn), 0.03% tin (Sn), 0.5% gallium (Ga), 0.01% indium (In), 0.05% silicon (Si), 0.05% neodymium (Nd), all the other are silver (Ag).
" cadmium-free silver brazing alloy that contains gallium, indium, silicon and rare earth neodymium " solidus temperature that the mentioned component proportioning obtains about 650 ℃, liquidus temperature (considered experimental error) about 710 ℃, cooperate FB102 (QJ102) brazing flux, soldering is identical with embodiment 1 with mother metal and brazed seam intensity data.
Embodiment 8
Press the mass percent proportioning, its composition is: 33.0% bronze medal (Cu), and 29.0% zinc (Zn), 0.3% tin (Sn), 0.05% gallium (Ga), 0.6% indium (In), 0.15% silicon (Si), 0.02% neodymium (Nd), all the other are silver (Ag).
" cadmium-free silver brazing alloy that contains gallium, indium, silicon and rare earth neodymium " solidus temperature that the mentioned component proportioning obtains about 645 ℃, liquidus temperature (considered experimental error) about 710 ℃, cooperate FB102 (QJ102) brazing flux, soldering is identical with embodiment 1 with mother metal and brazed seam intensity data.
Embodiment 9
Press the mass percent proportioning, its composition is: 26.0% bronze medal (Cu), and 22.0% zinc (Zn), 0.2% tin (Sn), 0.5% gallium (Ga), 0.2% indium (In), 0.04% silicon (Si), 0.02% neodymium (Nd), all the other are silver (Ag).
" cadmium-free silver brazing alloy that contains gallium, indium, silicon and rare earth neodymium " solidus temperature that the mentioned component proportioning obtains about 645 ℃, liquidus temperature (considered experimental error) about 715 ℃, cooperate FB102 (QJ102) brazing flux, soldering is identical with embodiment 1 with mother metal and brazed seam intensity data.
Embodiment 10
Press the mass percent proportioning, its composition is: 26.5% bronze medal (Cu), and 23.5% zinc (Zn), 0.03% tin (Sn), 0.02% gallium (Ga), 0.02% indium (In), 0.004% silicon (Si), 0.003% neodymium (Nd), all the other are silver (Ag).
" cadmium-free silver brazing alloy that contains gallium, indium, silicon and rare earth neodymium " solidus temperature that the mentioned component proportioning obtains about 650 ℃, liquidus temperature (considered experimental error) about 715 ℃, cooperate FB102 (QJ102) brazing flux, soldering is identical with embodiment 1 with mother metal and brazed seam intensity data.
Embodiment 11
Press the mass percent proportioning, its composition is: 31.0% bronze medal (Cu), and 28.0% zinc (Zn), 0.5% tin (Sn), 1.5% gallium (Ga), 3.0% indium (In), 0.05% silicon (Si), 0.01% neodymium (Nd), all the other are silver (Ag).
" cadmium-free silver brazing alloy that contains gallium, indium, silicon and rare earth neodymium " solidus temperature that the mentioned component proportioning obtains about 640 ℃, liquidus temperature (considered experimental error) about 705 ℃, cooperate FB102 (QJ102) brazing flux, soldering is identical with embodiment 1 with mother metal and brazed seam intensity data.
Embodiment 12
Press the mass percent proportioning, its composition is: 32.0% bronze medal (Cu), and 24.0% zinc (Zn), 0.8% tin (Sn), 4.5% gallium (Ga), 3.5% indium (In), 0.05% silicon (Si), 0.02% neodymium (Nd), all the other are silver (Ag).
" cadmium-free silver brazing alloy that contains gallium, indium, silicon and rare earth neodymium " solidus temperature that the mentioned component proportioning obtains about 635 ℃, liquidus temperature (considered experimental error) about 695 ℃, cooperate FB102 (QJ102) brazing flux, soldering is identical with embodiment 1 with mother metal and brazed seam intensity data.
Embodiment 13
Press the mass percent proportioning, its composition is: 29.5% bronze medal (Cu), and 24.2% zinc (Zn), 0.2% tin (Sn), 2.5% gallium (Ga), 0.5% indium (In), 0.02% silicon (Si), 0.005% neodymium (Nd), all the other are silver (Ag).
" cadmium-free silver brazing alloy that contains gallium, indium, silicon and rare earth neodymium " solidus temperature that the mentioned component proportioning obtains about 640 ℃, liquidus temperature (considered experimental error) about 705 ℃, cooperate FB102 (QJ102) brazing flux, soldering is identical with embodiment 1 with mother metal and brazed seam intensity data.
Embodiment 14
Press the mass percent proportioning, its composition is: 34.5% bronze medal (Cu), and 25.5% zinc (Zn), 0.1% tin (Sn), 1.5% gallium (Ga), 0.2% indium (In), 0.02% silicon (Si), 0.005% neodymium (Nd), all the other are silver (Ag).
" cadmium-free silver brazing alloy that contains gallium, indium, silicon and rare earth neodymium " solidus temperature that the mentioned component proportioning obtains about 645 ℃, liquidus temperature (considered experimental error) about 705 ℃, cooperate FB102 (QJ102) brazing flux, soldering is identical with embodiment 1 with mother metal and brazed seam intensity data.
The present invention since " containing gallium; indium; the cadmium-free silver brazing alloy of silicon and rare earth neodymium " to soldering mother metal red copper, brass, carbon steel, stainless steel, nickel-base alloy all has good wettability respectively, so any gallium that contains in the foregoing description 1 to embodiment 14, indium, the cadmium-free silver brazing alloy of silicon and rare earth neodymium, in soldering red copper-red copper, red copper-brass, brass-carbon steel, brass-stainless steel, carbon steel-stainless steel, carbon steel-nickel-base alloy, stainless steel-nickel-base alloy, red copper-nickel-base alloy, during different combined material (mother metal) such as brass-nickel-base alloy, combined material (mother metal) to institute's soldering all has good wetability, and soldered fitting has good comprehensive mechanical properties.
Claims (1)
1, a kind of cadmium-free silver brazing alloy that contains gallium, indium, silicon and rare earth neodymium, it is characterized in that: each chemical composition by the mass percent proportioning is: 25.0%～35.0% copper, 20.0%～30.0% zinc, 0.01%～1.0% tin, 0.001%～5.0% gallium, 0.001%～4.5% indium, 0.002%～0.5% silicon, 0.001%～0.10% neodymium, all the other are silver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100685653A CN100471613C (en) | 2007-05-14 | 2007-05-14 | Silver solder of containing gallium, indium, and rare earth silicon and neodymium without cadmium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100685653A CN100471613C (en) | 2007-05-14 | 2007-05-14 | Silver solder of containing gallium, indium, and rare earth silicon and neodymium without cadmium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101049656A CN101049656A (en) | 2007-10-10 |
| CN100471613C true CN100471613C (en) | 2009-03-25 |
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| CN102848100B (en) * | 2012-10-10 | 2015-03-25 | 南京航空航天大学 | Low-silver Sn-Ag-Cu lead-free brazing filler metal containing Nd and Ga |
| CN106736003B (en) * | 2016-12-15 | 2019-01-22 | 常熟市华银焊料有限公司 | The low cadmium brazing silver alloy of low melting point |
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Assignee: Jinzhong Welding Material Co., Ltd., Jinhua Zhejiang Assignor: Luo Huaming Contract fulfillment period: 2009.1.18 to 2027.5.13 Contract record no.: 2009330000471 Denomination of invention: Silver solder of containing gallium, indium, and rare earth silicon and neodymium without cadmium Granted publication date: 20090325 License type: Exclusive license Record date: 20090318 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.1.18 TO 2027.5.13; CHANGE OF CONTRACT Name of requester: JINHUA CITY JINZHONG WELDING MATERIALS CO., LTD. Effective date: 20090318 |
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Change date: 20110331 Contract record no.: 2009330000471 Assignor after: Luo Huaming Assignor before: Luo Huaming |
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Effective date of registration: 20180730 Address after: 321016 No. 306 Longtan Road, Wucheng District, Jinhua, Zhejiang Patentee after: Jinzhong Welding Material Co., Ltd., Jinhua Zhejiang Address before: 321016 Zhejiang 777 Jinhua (Jinhua Jinzhong Welding Material Co., Ltd.) Patentee before: Luo Huaming |
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Denomination of invention: Cadmium free silver solder containing gallium, indium, silicon and rare earth neodymium Effective date of registration: 20220615 Granted publication date: 20090325 Pledgee: Agricultural Bank of China Limited by Share Ltd. Jinhua Economic Development Zone Branch Pledgor: JINHUA JINZHONG WELDING MATERIALS CO.,LTD. Registration number: Y2022330000951 |