CN103192203A - Process method for preparing silver solder - Google Patents

Process method for preparing silver solder Download PDF

Info

Publication number
CN103192203A
CN103192203A CN2013100089171A CN201310008917A CN103192203A CN 103192203 A CN103192203 A CN 103192203A CN 2013100089171 A CN2013100089171 A CN 2013100089171A CN 201310008917 A CN201310008917 A CN 201310008917A CN 103192203 A CN103192203 A CN 103192203A
Authority
CN
China
Prior art keywords
orders
silver
powder
purity
particle size
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2013100089171A
Other languages
Chinese (zh)
Other versions
CN103192203B (en
Inventor
王玉天
张维钧
胡劲
文劲松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KUNMING BOSHENG METALLIC MATERIAL PROCESSING CO Ltd
Original Assignee
Kunming Guiqian New Materials Technology Research Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kunming Guiqian New Materials Technology Research Co Ltd filed Critical Kunming Guiqian New Materials Technology Research Co Ltd
Priority to CN201310008917.1A priority Critical patent/CN103192203B/en
Publication of CN103192203A publication Critical patent/CN103192203A/en
Application granted granted Critical
Publication of CN103192203B publication Critical patent/CN103192203B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention relates to a method for preparing silver solder. The method comprises the following specific steps: applying pressure to raw material particles arranged in a graphite crucible by upper and lower graphite press heads in a spark plasma sintering system (SPS) under the vacuum condition; directly heating the raw material particles by using pulse current; and breaking through an oxidation film of each particle of metal powder at instant high temperature and enabling the oxidation film to be subjected to surface activation and quick liquefaction. The reaction speed of particles and the reaction speed among the particles are increased, the diffusion speed of alloy element atoms is increased and the aims of quickly alloying and densifying a sintering body are achieved. Compared with a traditional smelting method, the method disclosed by the invention has the advantages of simple and easily-controlled process, no loss of alloy elements, accurate components of silver-based solder components, low oxygen content, short sintering time, low energy consumption, safety, no pollution and favorable reproducibility. The ingot products prepared by the method are high in density; crystal particles are fine and are uniform in size; and the method is an economic and efficient green preparation process.

Description

A kind of process for preparing silver solder
Technical field
The present invention relates to a kind of method for preparing silver solder, be different from the preparation method of traditional handicraft, serves as to make processing object with the silver-base solder of recommending among the GB/T 10046-2008 " silver solder ", belongs to brazing material processing and preparing technical field.
Background technology
Silver solder is present most widely used a kind of solder, and it has good processing performance, suitable fusing point, the good wetting and ability of filling up the gap.And the intensity height of solder and fine seam, plasticity is good, therefore electric conductivity and excellent corrosion resistance are widely used in all black and the non-ferrous metal of fine weldering except aluminium, magnesium and other low-melting-point metals, as: mild steel, stainless steel, high temperature alloy, copper and copper alloy, kovar alloy and refractory alloy.Be widely used in industry manufacture field such as refrigeration, lamp decoration, hardware appliance, instrument and meter, chemical industry, Aero-Space.
In recent years, the research of silver solder both at home and abroad mainly concentrates on design and the trial to silver solder chemical composition proportioning, comprises 4 aspects: (1) cadmium-free silver brazing alloy; (2) low silver-colored silver-less solder; (3) influence of alloying element; (4) development of novel brazing filler metal alloy system and the research of solder for ceramic soldering etc.But preparation technology generally adopts the melting mode, and namely raw material according to a certain ratio places intermediate frequency furnace to carry out melting and is cast into ingot, obtains a material by follow-up forging, extruding, drawing, or obtains the strip material by ingot casting cogging, roughing, finish rolling.Also adopt horizontal casting at present, and some other complexity, strict smelting technology guarantee ingot quality, prevent component segregation, improve mechanical property, mechanical performance and the welding performance of silver-base solder with this simultaneously.
But in the actual production no matter adopt which kind of smelting technology, alloying element loss in fusion process is bigger, especially reactive metal element (as: zinc, lithium, magnesium etc.) is easy to oxidation, alloying component is difficult to control, simultaneously because argent is easy to air-breathingly under molten condition, reported in literature is under molten condition, silver can dissolve the oxygen above 21 times of himself volumes, and this character of silver has brought problem for melting and casting.It makes alloy at high temperature volatilize easily or cause a large amount of losses because producing splash from the high temperature cooling procedure.And in subsequently ingot casting and temperature-fall period, can cause the generation of ingot casting internal flaw, or directly have influence on the follow-up mechanical performance of silver-base solder and welding performance.Though adopt modes such as deoxidier or vacuum melting at present, or introduced other impurity elements, or increase vacuum equipment, the continuity that influence is produced.
Summary of the invention
The purpose of this invention is to provide a kind of economy, discharge plasma sintering process prepares silver-base solder efficiently, to reduce the loss of alloying element in the fusion process, the assurance alloying component is accurate, improve ingot quality, reduce ingot casting oxygen content and internal flaw, improve mechanical mechanics property and the welding performance of silver-base solder.
The method that the present invention prepares silver solder comprises: with silver powder, with other simple metal element powders or intermediate alloy powder, according to selected prescription, be placed in the ball grinder of inner liner polytetrafluoroethylene and carry out ball milling, the powder that ball milling mixes is inserted in the SPS system graphite crucible, be evacuated to 2~10Pa, with 5~50 oBe warming up to 900~1100 in C/ minute oC, pressure are 5MPa~40MPa, 10 minutes~60 minutes dwell time, lower the temperature subsequently cold reach the material come out of the stove, the ingot bar precision behind the sintering is swaged, be drawn to a material subsequently, or rolling be sheet material.
Described silver powder purity 〉=99%, particle size range are 100 orders~500 orders.
Described simple metal element powders is: one of copper, nickel, zinc, tin, palladium, and purity 〉=99%, particle size range is 100 orders~500 orders.
Described intermediate alloy powder is to be M xN y, M is: one of copper, nickel, palladium; N is one of zinc, indium, lithium, and the x scope is: 0.50~0.99, y scope is 0.05~0.5.Purity 〉=99%, particle size range are 100 orders~500 orders.
The technology of the present invention principle is (spark plasma sintering in the discharge plasma sintering system, be called for short SPS), under vacuum condition, exert pressure by push-down head on the graphite placing the feed particles of graphite crucible, utilize the direct heating raw particle of pulse current, the oxide-film of breaking through each particle of metal dust under transient high temperature makes its surface active, and fast liquefying.Improve particle/intergranular reaction rate, increase the diffusion rate of alloying element atom, reach the rapid alloying of sintered body and densified purpose.
Compare with traditional smelting process, technology of the present invention is simple and easy to control, the loss of alloy-free element, and the silver-base solder composition is accurate, oxygen content is low, and sintering time is short, and energy consumption is low, safety non-pollution, favorable reproducibility.Prepared ingot density height, the crystal grain fine size is even, and the band of silver-base solder, silk material mechanical mechanics property are good, and weldability is good, is that a kind of technology is terse, cost is low, pollution-free green preparation technology.
The specific embodiment
The method step of preparation silver solder of the present invention comprises: with silver powder, with other simple metal element powders or intermediate alloy powder, according to selected prescription, be placed in the ball grinder of inner liner polytetrafluoroethylene and carry out ball milling, the powder that ball milling mixes is inserted in the SPS system graphite crucible, be evacuated to 2~10Pa, with 5~50 oBe warming up to 900~1100 in C/ minute oC, pressure are 5MPa~40MPa, 10 minutes~60 minutes dwell time, lower the temperature subsequently cold reach the material come out of the stove, the ingot bar precision behind the sintering is swaged, be drawn to a material subsequently, or rolling be sheet material.
Described silver powder purity 〉=99%, particle size range are 100 orders~500 orders.
Described simple metal element powders is: one of copper, nickel, zinc, tin, palladium, and purity 〉=99%, particle size range is 100 orders~500 orders.
Described intermediate alloy powder is to be M xN y, M is: one of copper, nickel, palladium; N is one of zinc, indium, lithium, and the x scope is: 0.50~0.99, y scope is 0.05~0.5.Purity 〉=99%, particle size range are 100 orders~500 orders.
The present invention specifically implements by following steps:
1, with particle size range 100 orders~300 order silver powder, purity 〉=99%.With other particle size range 100 orders~500 order alloying element powders, one of copper, nickel, zinc, tin, palladium, purity 〉=99%, particle size range is 100 orders~500 orders.Or the intermediate alloy powder, M xN y, M is: one of copper, nickel, palladium; N is one of zinc, indium, lithium, and the x scope is: 0.50~0.99, y scope is 0.05~0.5, purity 〉=99%, and particle size range is 100 orders~500 orders.According to selected prescription, be placed in the ball grinder of inner liner polytetrafluoroethylene, ratio of grinding media to material 1:3~5, rotating speed 100~300 rpm/min, evenly batch mixing is 0.5~3 hour.
2, the powder that ball milling is mixed is inserted in the SPS system graphite crucible, is evacuated to 2~10Pa, with 5~50 oBe warming up to 900~1100 in C/ minute oC, pressure are 5MPa~40MPa, 10 minutes~60 minutes dwell time.The cold material that reaches of lowering the temperature is subsequently come out of the stove.
3, the ingot bar precision behind the sintering is swaged, is drawn to a material subsequently, or rolling be sheet material, dimensional tolerance is decided according to actual conditions.
The present invention adopts discharge plasma sintering technique, utilize the transient high temperature under the plasmoid, by control programming rate, sintering temperature, pressing pressure, make the liquefaction of different material particle surface fast activating and the rapid alloying of silver-base solder, form fine and close ingot bar material, the silver-base solder ingot bar crystal grain that obtains is tiny, size is even.Because sintering time is short, compares with traditional smelting technology, the Volatile Elements loss is little, and formulated component is accurate, and oxygen content is low.Make the silver-base solder ingot bar have good plastic working ability, guarantee that silk material or band have good mechanical mechanics property and welding performance.It is simple and easy to control that this invention has technology, the loss of alloy-free element, and silver-colored Composition Control is accurate, and sintering time is short, and energy consumption is low, safety non-pollution, characteristics such as favorable reproducibility.
Below be described in detail several embodiments of the present invention, but the present invention not only is limited to this.
Embodiment 1Be 99.5% with purity, particle size range 100 order silver powder 72 grams, with purity 99%, particle size range 100 purpose copper powders 28 grams place the ball grinder of inner liner polytetrafluoroethylene, ratio of grinding media to material 1:3, rotating speed 100rpm/min, evenly batch mixing is 1 hour.The powder that ball milling mixes to be inserted in the SPS system graphite crucible, graphite crucible is of a size of * and 10, be evacuated to 5Pa, with 5 oBe warming up to 900 in C/ minute oC, pressure are 5MPa, and 15 minutes dwell times, the cold material that reaches of lowering the temperature is subsequently come out of the stove.Ingot bar precision behind the sintering is swaged to Φ 6, be drawn to a material Φ 1 ± 0.05 subsequently.
Embodiment 2Be 99.5% with purity, particle size range is 200 order silver powder, 80 grams, with purity be 99%, particle size range is 200 purpose copper nickel intermediate alloy powder Cu 0.9Ni 0.120 restrain, and place the ball grinder of inner liner polytetrafluoroethylene, ratio of grinding media to material 1:5, and rotating speed 200rpm/min, evenly batch mixing is 2 hours.The powder that ball milling mixes is inserted in the SPS system graphite crucible, and graphite crucible is of a size of Φ 20 * 10, is evacuated to 5Pa, with 25 oBe warming up to 1100 in C/ minute oC, pressure are 20MPa, and 20 minutes dwell times, the cold material that reaches of lowering the temperature is subsequently come out of the stove.Ingot bar precision behind the sintering is swaged to Φ 6, and rolling subsequently is sheet material 6 * 0.5 ± 0.01.
Embodiment 3Be 99.5% with purity, particle size range is 300 order silver powder, 70 grams, with purity be 99%, particle size range is 300 purpose copper indium intermediate alloy powder Cu 0.95In 0.0530 restrain, and place the ball grinder of inner liner polytetrafluoroethylene, ratio of grinding media to material 1:4, and rotating speed 300rpm/min, evenly batch mixing is 0.5 hour.The powder that ball milling mixes is inserted in the SPS system graphite crucible, and graphite crucible is of a size of Φ 20 * 10, is evacuated to 3Pa, with 50 oBe warming up to 950 in C/ minute oC, pressure are 30MPa, and 10 minutes dwell times, the cold material that reaches of lowering the temperature is subsequently come out of the stove.Ingot bar precision behind the sintering is swaged to Φ 10, and rolling subsequently is sheet material 10 * 0.2 ± 0.01.

Claims (4)

1. method for preparing silver solder, its feature comprises: with silver powder, with other simple metal element powders or intermediate alloy powder, according to selected prescription, be placed in the ball grinder of inner liner polytetrafluoroethylene and carry out ball milling, the powder that ball milling mixes is inserted in the SPS system graphite crucible, be evacuated to 2~10Pa, with 5~50 oBe warming up to 900~1100 in C/ minute oC, pressure are 5MPa~40MPa, 10 minutes~60 minutes dwell time, lower the temperature subsequently cold reach the material come out of the stove, the ingot bar precision behind the sintering is swaged, be drawn to a material subsequently, or rolling be sheet material.
2. a kind of method for preparing silver solder according to claim 1 is characterized in that described silver powder purity 〉=99%, and particle size range is 100 orders~500 orders.
3. a kind of method for preparing silver solder according to claim 1 is characterized in that described simple metal element powders is: one of copper, nickel, zinc, tin, palladium, and purity 〉=99%, particle size range is 100 orders~500 orders.
4. a kind of method for preparing silver solder according to claim 1 is characterized in that described intermediate alloy powder is to be M xN y, M is: one of copper, nickel, palladium; N is one of zinc, indium, lithium, and the x scope is: 0.50~0.99, y scope is 0.05~0.5, purity 〉=99%, and particle size range is 100 orders~500 orders.
CN201310008917.1A 2013-01-10 2013-01-10 Process method for preparing silver solder Active CN103192203B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310008917.1A CN103192203B (en) 2013-01-10 2013-01-10 Process method for preparing silver solder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310008917.1A CN103192203B (en) 2013-01-10 2013-01-10 Process method for preparing silver solder

Publications (2)

Publication Number Publication Date
CN103192203A true CN103192203A (en) 2013-07-10
CN103192203B CN103192203B (en) 2015-06-17

Family

ID=48715117

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310008917.1A Active CN103192203B (en) 2013-01-10 2013-01-10 Process method for preparing silver solder

Country Status (1)

Country Link
CN (1) CN103192203B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103659059A (en) * 2013-12-12 2014-03-26 北京科技大学 Method for preparing annular moderate-temperature Ag-Cu-Sn brazing filler metal piece
CN105921908A (en) * 2016-06-23 2016-09-07 国网江苏省电力公司宿迁供电公司 Silver solder and preparation method thereof
CN106001989A (en) * 2016-06-23 2016-10-12 国网江苏省电力公司宿迁供电公司 Silver brazing flux and preparation method thereof
CN108907500A (en) * 2018-08-03 2018-11-30 北京有色金属与稀土应用研究所 A kind of high temperature auri active solder and preparation method thereof
CN111015017A (en) * 2019-12-20 2020-04-17 西南交通大学 Mn-Cu-based welding wire and preparation method and application thereof
CN114029651A (en) * 2021-11-18 2022-02-11 东北大学 Titanium-containing active solder and preparation method and application thereof

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1064637A (en) * 1991-03-14 1992-09-23 中国有色金属工业总公司昆明贵金属研究所 The method for welding of money base soldering paste and Silver Jewelry
JP2001261440A (en) * 2000-03-17 2001-09-26 Chubu Electric Power Co Inc Oxidation-resistant hafnium carbide sintered body and oxidation-resistant hafnium carbide-lanthanum boride sintered body, their production processes and electrode for plasma generation, made by using the same
CN1446664A (en) * 2003-04-10 2003-10-08 贵研铂业股份有限公司 Silver alloy solder with low palladium content
CN1920076A (en) * 2006-09-08 2007-02-28 北京科技大学 Method of producing hydrogen-storage alloy by discharge plasma sintering technique
CN101224501A (en) * 2008-01-25 2008-07-23 北京科技大学 Fabricating method of Mg base thermoelectricity material
CN101478026A (en) * 2009-01-21 2009-07-08 清华大学 Thermoelectric compounds and preparation thereof
CN101575679A (en) * 2009-06-22 2009-11-11 北京科技大学 Preparation method of Mg-Ni series hydrogen storage alloy
CN101693325A (en) * 2009-10-14 2010-04-14 郑州机械研究所 High-toughness cadmium-free silver solder and preparation method thereof
US20110247671A1 (en) * 2010-04-08 2011-10-13 Samsung Electronics Co., Ltd. Thermoelectric material and method of preparing the same
CN102240870A (en) * 2011-05-20 2011-11-16 杭州华光焊接新材料股份有限公司 Multielement rare-earth silver solder

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1064637A (en) * 1991-03-14 1992-09-23 中国有色金属工业总公司昆明贵金属研究所 The method for welding of money base soldering paste and Silver Jewelry
JP2001261440A (en) * 2000-03-17 2001-09-26 Chubu Electric Power Co Inc Oxidation-resistant hafnium carbide sintered body and oxidation-resistant hafnium carbide-lanthanum boride sintered body, their production processes and electrode for plasma generation, made by using the same
CN1446664A (en) * 2003-04-10 2003-10-08 贵研铂业股份有限公司 Silver alloy solder with low palladium content
CN1920076A (en) * 2006-09-08 2007-02-28 北京科技大学 Method of producing hydrogen-storage alloy by discharge plasma sintering technique
CN101224501A (en) * 2008-01-25 2008-07-23 北京科技大学 Fabricating method of Mg base thermoelectricity material
CN101478026A (en) * 2009-01-21 2009-07-08 清华大学 Thermoelectric compounds and preparation thereof
CN101575679A (en) * 2009-06-22 2009-11-11 北京科技大学 Preparation method of Mg-Ni series hydrogen storage alloy
CN101693325A (en) * 2009-10-14 2010-04-14 郑州机械研究所 High-toughness cadmium-free silver solder and preparation method thereof
US20110247671A1 (en) * 2010-04-08 2011-10-13 Samsung Electronics Co., Ltd. Thermoelectric material and method of preparing the same
CN102240870A (en) * 2011-05-20 2011-11-16 杭州华光焊接新材料股份有限公司 Multielement rare-earth silver solder

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
张启运,庄鸿手册: "《钎焊手册》", 30 January 1999 *
陈文革,王发展: "《粉末冶金工艺及材料》", 30 July 2011 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103659059A (en) * 2013-12-12 2014-03-26 北京科技大学 Method for preparing annular moderate-temperature Ag-Cu-Sn brazing filler metal piece
CN103659059B (en) * 2013-12-12 2016-08-17 北京科技大学 A kind of method preparing annular Ag-Cu-Sn intermediate temperature solder sheet
CN105921908A (en) * 2016-06-23 2016-09-07 国网江苏省电力公司宿迁供电公司 Silver solder and preparation method thereof
CN106001989A (en) * 2016-06-23 2016-10-12 国网江苏省电力公司宿迁供电公司 Silver brazing flux and preparation method thereof
CN108907500A (en) * 2018-08-03 2018-11-30 北京有色金属与稀土应用研究所 A kind of high temperature auri active solder and preparation method thereof
CN111015017A (en) * 2019-12-20 2020-04-17 西南交通大学 Mn-Cu-based welding wire and preparation method and application thereof
CN111015017B (en) * 2019-12-20 2021-09-14 西南交通大学 Mn-Cu-based welding wire and preparation method and application thereof
CN114029651A (en) * 2021-11-18 2022-02-11 东北大学 Titanium-containing active solder and preparation method and application thereof
CN114029651B (en) * 2021-11-18 2022-07-01 东北大学 Titanium-containing active solder and preparation method and application thereof

Also Published As

Publication number Publication date
CN103192203B (en) 2015-06-17

Similar Documents

Publication Publication Date Title
CN103192203B (en) Process method for preparing silver solder
CN101121974B (en) High-strength high-conduction strengthened dispersion copper alloy and preparation method thereof
CN100417736C (en) Method for preparing alumina dispersion-strenghtened copper-base composite material
CN106167870A (en) A kind of NbMoTaW high-entropy alloy and preparation method thereof
CN108103381A (en) A kind of high-strength F eCoNiCrMn high-entropy alloys and preparation method thereof
CN105950944B (en) A kind of high-melting-point high-entropy alloy NbMoTaWVTi and preparation method thereof
CN102430874A (en) Titanium-based amorphous brazing alloy foil strip for brazing and preparation method for foil strip
CN104946915A (en) Preparation method of fine-grained CuCr alloy
CN108971801B (en) Ti-Zr-Ni-Fe-Cu-Co-Mo-B brazing filler metal and preparation method and application thereof
CN103949802A (en) Ti-Zr-Cu-Ni-Co-Mo amorphous brazing filler metal and preparing method thereof
CN104212989A (en) Method for smelting and producing TA10 hot continuous rolling square billet by adopting electron beam cooling bed furnace
CN101127253B (en) Silver nickel electricity-conductive ceramic electrical contact material and its production method
CN111519078A (en) High-nickel eutectic high-entropy alloy powder for additive manufacturing and preparation method thereof
CN104404282A (en) Tungsten copper alloy with low tungsten content and preparation method of tungsten copper alloy
CN103433488B (en) Preparation method of titanium nitride-ferrous metal ceramics
CN115044794B (en) Cu- (Y) with excellent performance 2 O 3 -HfO 2 ) Alloy and preparation method thereof
CN103170764B (en) Brazing filler alloy powder and preparation method thereof
CN102808099A (en) Preparation method for Al2O3 dispersion-strengthened Cu/Cr composite material
CN102026467B (en) Silver-hafnium alloy material for DC arc air plasma torch cathode and preparation method thereof
CN101914697A (en) Method for preparing silver-magnesium-nickel alloy billets
CN102978340A (en) Steelmaking deoxidizing agent and preparation method thereof
CN103266235B (en) Solid-phase alloying method of aluminum-silicon powder under high-pressure condition
CN105177304A (en) Method for producing TB6 plate slab by electron beam cold hearth melting
CN103045924A (en) Electron beam smelting method for preparing tungsten electrode material
CN107779626B (en) A kind of Al-Ti-B-Sr composite intermediate alloy and the preparation method and application thereof

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20151202

Address after: 655204 Tianshengqiao Industrial Park, Dongchuan District, Yunnan, Kunming

Patentee after: KUNMING BOSHENG METALLIC MATERIAL PROCESSING Co.,Ltd.

Address before: 650093, room 8527, building A, Pioneer Building, National Science Park, Kunming University of Science and Technology, Kunming, Wuhua, Yunnan, 296, China

Patentee before: KUNMING GUIQIAN NEW MATERIAL TECHNOLOGY RESEARCH CO.,LTD.

PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of invention: A process for preparing silver solder

Effective date of registration: 20221019

Granted publication date: 20150617

Pledgee: Kunming Dongfeng Sub branch of Bank of China Ltd.

Pledgor: KUNMING BOSHENG METALLIC MATERIAL PROCESSING Co.,Ltd.

Registration number: Y2022530000033

PE01 Entry into force of the registration of the contract for pledge of patent right
PC01 Cancellation of the registration of the contract for pledge of patent right

Date of cancellation: 20231129

Granted publication date: 20150617

Pledgee: Kunming Dongfeng Sub branch of Bank of China Ltd.

Pledgor: KUNMING BOSHENG METALLIC MATERIAL PROCESSING Co.,Ltd.

Registration number: Y2022530000033

PC01 Cancellation of the registration of the contract for pledge of patent right
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of invention: A Process Method for Preparing Silver Solder Materials

Effective date of registration: 20231226

Granted publication date: 20150617

Pledgee: Kunming Dongfeng Sub branch of Bank of China Ltd.

Pledgor: KUNMING BOSHENG METALLIC MATERIAL PROCESSING Co.,Ltd.

Registration number: Y2023530000068

PE01 Entry into force of the registration of the contract for pledge of patent right