CN103612032A - Sheath-coated flux-cored brazing wire and production method thereof - Google Patents

Sheath-coated flux-cored brazing wire and production method thereof Download PDF

Info

Publication number
CN103612032A
CN103612032A CN201310553417.6A CN201310553417A CN103612032A CN 103612032 A CN103612032 A CN 103612032A CN 201310553417 A CN201310553417 A CN 201310553417A CN 103612032 A CN103612032 A CN 103612032A
Authority
CN
China
Prior art keywords
flux
silk
alloy
sandwich
wire
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.)
Pending
Application number
CN201310553417.6A
Other languages
Chinese (zh)
Inventor
陆汉龙
欧阳剑雄
徐龙江
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.)
SHANGHAI LONGSHUO WELDING MATERIAL Co Ltd
Original Assignee
SHANGHAI LONGSHUO WELDING MATERIAL 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 SHANGHAI LONGSHUO WELDING MATERIAL Co Ltd filed Critical SHANGHAI LONGSHUO WELDING MATERIAL Co Ltd
Priority to CN201310553417.6A priority Critical patent/CN103612032A/en
Publication of CN103612032A publication Critical patent/CN103612032A/en
Pending legal-status Critical Current

Links

Images

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
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/368—Selection of non-metallic compositions of core materials either alone or conjoint with selection of soldering or welding materials
    • 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
    • B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
    • B23K35/3603—Halide salts
    • B23K35/3605—Fluorides
    • 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
    • B23K35/40—Making wire or rods for soldering or welding
    • B23K35/406—Filled tubular wire or rods

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Nonmetallic Welding Materials (AREA)

Abstract

The invention discloses a sheath-coated flux-cored brazing wire and a production method thereof. The flux-cored wire is composed of an alloy sheath, sandwich wires and brazing flux, and is characterized in that compositions of the composite flux-cored wire are determined according to the proportion of the alloy sheath and the sandwich wires, the alloy sheath is 0.2-0.8mm in thickness, the sandwich wires are copper wires, brass wires and the like with the diameter phi of 0.02-0.2mm, and the brazing flux is potassium fluoroaluminate or cesium tetrafluoroaluminate complex, or a chemical compound which is synthesized from KF, AlF3 and CsF in an eutectic manner. When the novel wire is produced, sheath alloy is processed into an alloy strip 0.2-0.8mm in thickness and 6-16mm in width, the alloy strip is rolled into an U-shaped groove via a forming machine, the sandwich wires are put into the U-shaped groove, then the brazing flux is added, the diameter is reduced to phi 2.4-3.0mm after the wires and the brazing flux are synthesized to be O-shaped, diameter reducing is performed via a wire drawing machine unit, and the O-shaped product is fed into a wire rewinding machine to be produced into the novel sheath-coated flux-cored wire. The novel heath-coated flux-cored wire has the advantages that alloying effect of the alloy sheath and the sandwich wires is good during brazing, brazing seams are uniform in composition, joint strength is high, and the problem that part of high-performance brazing solder cannot be processed into the flux-cored wire easily is solved.

Description

A kind of suitcase silk medicine core soldering wire and preparation method thereof
Technical field
The present invention relates to welding brazing material field, particularly a kind of novel suitcase silk medicine core soldering wire structure and preparation method thereof.
Background technology
The advantages such as soldering, as an accurate interconnection technique, has mother metal deflection little during soldering, dimensional accuracy is high, and joint smooth and beautiful appearance, air-tightness are good, be aluminium alloy connect and aluminum bronze dissimilar metal between the important method that connects.During soldering, between weldment, be that the solder rely on melting fills up play movement by wetting action and capillarity, and with the counterdiffusion of mother metal phase, after solidifying, couple together, so the quality of weld seam depends on solder to a great extent.
The mechanical property of joint particularly tensile strength and shear strength is the important indicator of soldering, and traditional solder welding often occurs that weld strength is low, anti-crack ability is poor, has restricted the soldering development of some high-intensity aluminum alloy junction member and aluminium copper.For improving the intensity of aluminium alloy and aluminum bronze soldered seam, in welding wire, add the alloying elements such as Cu, Ni, but conventionally can cause welding wire fragility large,, the accident such as even there is breaking in formability variation, cannot be processed into flux-cored wire on wire-drawing process.Publication number is that 102935562A patent of invention discloses a kind of metallic particles enhancing explosive core aluminium welding wire, adds alloying pellet and brazing flux, thereby guaranteed the processability of welding wire in medicine core.But welding wire production cost is higher, before production welding wire, alloy to be done to powdered or particle, add powder process and be difficult to guarantee that alloying pellet mixes with brazing flux.Produce above and mainly with single roller melt-quenching method, make the strip scolder without medicine core at present, to soldering, make troubles.Therefore, current technology is difficult to produce high-strength flux-cored wire.
Summary of the invention
The object of the invention be to overcome prior art in deficiency, compound flux-cored wire of a kind of novel suitcase silk and preparation method thereof is provided, solve the problem of high-strength flux-cored wire difficult processing.
To achieve these goals, technical scheme of the present invention is as follows:
A suitcase silk medicine core soldering wire, comprises crust and the medicine core that is filled in crust inside, is also provided with sandwich silk between described crust and medicine core, wherein, described crust is alloy, and described sandwich silk is wire, and described medicine core is potassium fluoroaluminate, fluoaluminic acid caesium or eutectic synthetic KF, AlF 3mixture with CsF.
As preferred version, the thickness of described crust is 0.2～0.8mm.
As preferred version, KF, AlF that described eutectic is synthetic 3in the mixture of CsF, by mass fraction, KF:2.51～48.36%, AlF 3: 28.31～51.64%,, CsF:0～66.51%.
As preferred version, the diameter of described sandwich silk is 0.02～0.2mm.
As preferred version, the material of described crust is aluminium alloy.
As preferred version, the material of described sandwich silk is red copper or brass.
The invention also discloses a kind of method of preparing soldering wire of the present invention, comprise the steps:
It is 0.2～0.8mm that described alloy is processed into thickness, the alloy sheet material that width is 6～16mm;
Described sheet material is rolled into U-shaped groove structure, in described U-shaped groove, put into successively sandwich silk and medicine core;
U-shaped groove is rolled into O type, and tube reducing to diameter is 2.4～3.0mm;
Tube reducing, obtains product again.
As preferred version, described brazing flux is potassium fluoroaluminate, fluoaluminic acid caesium or eutectic synthetic KF, AlF 3mixture with CsF.
As preferred version, in KF, the AlF3 that described eutectic is synthetic and the mixture of CsF, by mass fraction, KF:2.51～48.36%, AlF3:28.31～51.64%, CsF:0～66.51%.
As preferred version, described alloy is aluminium alloy, and the material of described sandwich silk is red copper or brass.
The present invention has following advantage with respect to prior art:
1. by suitcase silk method, can produce most of high-strength flux-cored wire, production method is simple, has solved the difficult problem that part high-performance brazing material is difficult to be processed into flux-cored wire;
2. suitcase silk flux-cored wire method has been avoided adding in intermediate core the powder mixing non-uniform phenomenon that alloying pellet causes;
3. suitcase silk flux-cored wire is in brazing process, and the alloying of crust and sandwich silk is effective, good wetability and mobility, and seam organization composition is even, and strength of joint is high.
Accompanying drawing explanation
Fig. 1 is suitcase silk flux-cored wire structural representation of the present invention.
The specific embodiment
KF(2.51～48.36%)+AlF 3(28.31～51.64%)+CsF(0～66.51%) preparation method of mixture is: will analyze pure CsF, AlF 3and KF powder weighs up mixing by formula rate, then gained mixed-powder is ground in platinum mortar, in process of lapping, mixed-powder first becomes pasty state, continues to be ground to pastel and becomes white dry powder, and this white dry powder is brazing flux.
When the content of CsF is lower or be zero, exist, i.e. NOCOLOK brazing flux, due to price limit, CsF does not generally add.
Embodiment 1
The novel suitcase silk of the present invention flux-cored wire crust is as crust 1 in welding wire structural representation, and specification is 0.4 * 9mm4045 aluminium alloy band, and sandwich silk 2 is the copper wire of φ 0.1mm, and brazing flux 3 is raw material KF(2.51～48.36%)+AlF 3(28.31～51.64%)+CsF(0～66.51%) mixture, brazing process crust and sandwich silk melt formation Al-Si-Cu alloy, and its composition is Si:7～9%, Cu17～21%, surplus is Al.
Welding wire preparation process:
One, 4045 aluminium alloys being processed into thickness is 0.4mm, the aluminium alloy band that width is 9mm;
Two, alloy band is rolled into U-shaped groove structure in forming machine, add the copper wire of 21 φ 0.1mm, then add the above-mentioned brazing flux mixing in U-shaped groove, finally synthesize O type, tube reducing is to φ 2.4mm;
Three, through wire drawing unit tube reducing, finally enter admission machine, make the novel suitcase silk of φ 1.8mm flux-cored wire.
Embodiment 2
The novel suitcase silk of the present invention flux-cored wire crust is as crust 1 in welding wire structural representation, and specification is 0.4 * 12mm4047 aluminium alloy band, and sandwich silk 2 is the brass wire of φ 0.08mm, and brazing flux 3 is raw material KF(2.51～48.36%)+AlF 3(28.31～51.64%)+CsF(0～66.51%) mixture, brazing process crust and sandwich silk melt formation aluminium copper silicon kirsite, and its composition is Si7～10%, Cu20～24%, Zn4～6% surplus is Al.
Welding wire preparation process:
One, 4047 aluminium alloys being processed into thickness is 0.4mm, the aluminium alloy band that width is 12mm;
Two, alloy band is rolled into U-shaped groove structure in forming machine, add the copper wire of 20 φ 0.08mm, then add the above-mentioned brazing flux mixing in U-shaped groove, finally synthesize O type, tube reducing is to φ 3.2mm;
Three, through wire drawing unit tube reducing, finally enter admission machine, make the novel suitcase silk of φ 2.4mm flux-cored wire.
Embodiment 3
The novel suitcase silk of the present invention flux-cored wire crust is as crust 1 in welding wire structural representation, and specification is 0.6 * 10mm4045 aluminium alloy band, and sandwich silk 2 is the brass wire of φ 0.12mm, and brazing flux 3 is raw material KF(2.51～48.36%)+AlF 3(28.31～51.64%)+CsF(0～66.51%) mixture, brazing process crust and sandwich silk melt formation aluminium copper silicon kirsite, and its composition is Si6～10%, Cu16～20%, Zn1～2% surplus is Al.
Welding wire preparation process:
One, 4045 aluminium alloys being processed into thickness is 0.6mm, the aluminium alloy band that width is 10mm;
Two, alloy band is rolled into U-shaped groove structure in forming machine, add the copper wire of 6 φ 0.12mm, then add the above-mentioned brazing flux mixing in U-shaped groove, finally synthesize O type, tube reducing is to φ 2.6mm;
Three, through wire drawing unit tube reducing, finally enter admission machine, make the novel suitcase silk of φ 2.0mm flux-cored wire.
In sum, it is only preferred embodiment of the present invention, not be used for limiting scope of the invention process, all equalizations of doing according to the shape described in the claims in the present invention scope, structure, feature and spirit change and modify, and all should be included within the scope of claim of the present invention.

Claims (10)

1. a suitcase silk medicine core soldering wire, it is characterized in that, comprise crust and the medicine core that is filled in crust inside, between described crust and medicine core, be also provided with sandwich silk, wherein, described crust is alloy, and described sandwich silk is wire, and described medicine core is potassium fluoroaluminate, fluoaluminic acid caesium or eutectic synthetic KF, AlF 3mixture with CsF.
2. soldering wire according to claim 1, is characterized in that, the thickness of described crust is 0.2～0.8mm.
3. soldering wire according to claim 1, is characterized in that, KF, AlF that described eutectic is synthetic 3in the mixture of CsF, by mass fraction, KF:2.51～48.36%, AlF 3: 28.31～51.64%, CsF:0～66.51%.
4. soldering wire according to claim 1, is characterized in that, the diameter of described sandwich silk is 0.02～0.2mm.
5. soldering wire according to claim 1, is characterized in that, the material of described crust is aluminium alloy.
6. according to the soldering wire described in claim 1 or 4, it is characterized in that, the material of described sandwich silk is red copper or brass.
7. a preparation method for suitcase silk medicine core soldering wire, is characterized in that, comprises the steps:
It is 0.2～0.8mm that described alloy is processed into thickness, the alloy sheet material that width is 6～16mm;
Described sheet material is rolled into U-shaped groove structure, in described U-shaped groove, put into successively sandwich silk and medicine core;
U-shaped groove is rolled into O type, and tube reducing to diameter is 2.4～3.0mm;
Tube reducing, obtains product again.
8. the preparation method of suitcase silk soldering wire according to claim 7, is characterized in that, described brazing flux is potassium fluoroaluminate, fluoaluminic acid caesium or eutectic synthetic KF, AlF3 and the mixture of CsF.
9. the preparation method of suitcase silk soldering wire according to claim 8, is characterized in that, in KF, the AlF3 that described eutectic is synthetic and the mixture of CsF, and by mass fraction, KF:2.51～48.36%, AlF3:28.31～51.64%, CsF:0～66.51%.
10. according to the preparation method of the described suitcase silk of one of claim 7 to 9 soldering wire, it is characterized in that, described alloy is aluminium alloy, and the material of described sandwich silk is red copper or brass.
CN201310553417.6A 2013-11-08 2013-11-08 Sheath-coated flux-cored brazing wire and production method thereof Pending CN103612032A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310553417.6A CN103612032A (en) 2013-11-08 2013-11-08 Sheath-coated flux-cored brazing wire and production method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310553417.6A CN103612032A (en) 2013-11-08 2013-11-08 Sheath-coated flux-cored brazing wire and production method thereof

Publications (1)

Publication Number Publication Date
CN103612032A true CN103612032A (en) 2014-03-05

Family

ID=50162766

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310553417.6A Pending CN103612032A (en) 2013-11-08 2013-11-08 Sheath-coated flux-cored brazing wire and production method thereof

Country Status (1)

Country Link
CN (1) CN103612032A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104107987A (en) * 2014-07-02 2014-10-22 安徽汇展热交换系统有限公司 Anti-corrosion self-brazed aluminum solder
CN104191111A (en) * 2014-08-15 2014-12-10 郑州机械研究所 Aluminum-silicon seamless flux-cored wire containing germanium and hafnium and preparing method thereof
CN104384757A (en) * 2014-09-28 2015-03-04 杭州华光焊接新材料股份有限公司 Preparation method of brass flux-cored welding ring
CN104690448A (en) * 2015-02-25 2015-06-10 江苏科技大学 Cored copper welding wire suitable for small area brazing
CN104907723A (en) * 2015-05-25 2015-09-16 郑州机械研究所 Flux-cored silver brazing filler metal with toughening alloy
CN105537794A (en) * 2016-02-05 2016-05-04 合肥美菱股份有限公司 Flux-cored soldering ring
CN111992922A (en) * 2020-08-26 2020-11-27 郑州机械研究所有限公司 Flux-cored solder, preparation method thereof and powder breaking rate detection system of flux-cored solder
CN113305467A (en) * 2021-05-31 2021-08-27 广东省科学院中乌焊接研究所 Aluminum brazing flux and preparation method thereof
CN113579562A (en) * 2021-07-26 2021-11-02 西安理工大学 Metal fiber type flux-cored wire and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1759973A (en) * 2005-10-25 2006-04-19 哈尔滨工业大学 Aluminum welding ring and flux core in use for welding joint of tubes made from aluminum and aluminum alloy, and preparation method
CN101323065A (en) * 2008-07-08 2008-12-17 郑州机械研究所 Self-fluxing aluminum solder and method for preparing the same
CN102658439A (en) * 2012-05-15 2012-09-12 力创(台山)电子科技有限公司 Brazing aluminium soldering ring for welding aluminum or aluminum alloy product and manufacture method of brazing aluminium soldering ring
CN102935562A (en) * 2012-12-10 2013-02-20 郑州机械研究所 Metal granular reinforced aluminum flux cored wire

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1759973A (en) * 2005-10-25 2006-04-19 哈尔滨工业大学 Aluminum welding ring and flux core in use for welding joint of tubes made from aluminum and aluminum alloy, and preparation method
CN101323065A (en) * 2008-07-08 2008-12-17 郑州机械研究所 Self-fluxing aluminum solder and method for preparing the same
CN102658439A (en) * 2012-05-15 2012-09-12 力创(台山)电子科技有限公司 Brazing aluminium soldering ring for welding aluminum or aluminum alloy product and manufacture method of brazing aluminium soldering ring
CN102935562A (en) * 2012-12-10 2013-02-20 郑州机械研究所 Metal granular reinforced aluminum flux cored wire

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104107987A (en) * 2014-07-02 2014-10-22 安徽汇展热交换系统有限公司 Anti-corrosion self-brazed aluminum solder
CN104191111A (en) * 2014-08-15 2014-12-10 郑州机械研究所 Aluminum-silicon seamless flux-cored wire containing germanium and hafnium and preparing method thereof
CN104191111B (en) * 2014-08-15 2016-02-17 郑州机械研究所 A kind of preparation method of aluminium silicon seamless flux-cored wire of germanic, hafnium
CN104384757A (en) * 2014-09-28 2015-03-04 杭州华光焊接新材料股份有限公司 Preparation method of brass flux-cored welding ring
CN104690448A (en) * 2015-02-25 2015-06-10 江苏科技大学 Cored copper welding wire suitable for small area brazing
CN104907723A (en) * 2015-05-25 2015-09-16 郑州机械研究所 Flux-cored silver brazing filler metal with toughening alloy
CN104907723B (en) * 2015-05-25 2017-08-25 郑州机械研究所 Carry the medicine core silver solder of increasing tougheness alloy
CN105537794A (en) * 2016-02-05 2016-05-04 合肥美菱股份有限公司 Flux-cored soldering ring
CN111992922A (en) * 2020-08-26 2020-11-27 郑州机械研究所有限公司 Flux-cored solder, preparation method thereof and powder breaking rate detection system of flux-cored solder
CN111992922B (en) * 2020-08-26 2022-03-29 郑州机械研究所有限公司 Flux-cored solder, preparation method thereof and powder breaking rate detection system of flux-cored solder
CN113305467A (en) * 2021-05-31 2021-08-27 广东省科学院中乌焊接研究所 Aluminum brazing flux and preparation method thereof
CN113579562A (en) * 2021-07-26 2021-11-02 西安理工大学 Metal fiber type flux-cored wire and preparation method thereof

Similar Documents

Publication Publication Date Title
CN103612032A (en) Sheath-coated flux-cored brazing wire and production method thereof
CN102935562B (en) Metal granular reinforced aluminum flux cored wire
CN103612026B (en) A kind of composite soldering explosive core aluminium welding wire and preparation method thereof
CN104191111B (en) A kind of preparation method of aluminium silicon seamless flux-cored wire of germanic, hafnium
CN102935559B (en) Composite zinc-aluminum flux cored wire containing beryllium and magnesium and rubidium salt and preparation method of flux cored wire
CN100496864C (en) Cadmium-free silver solder containing gallium, indium, and rare earth neodymium and cerium
CN103769760B (en) A kind of low melting point compound self-fluxing almit and preparation method thereof
CN103990917B (en) A kind of fluted body aluminium alloy compound welding wire and manufacture method thereof
CN113732563A (en) Transition layer welding wire for preparing titanium-steel gradient composite material CMT and preparation method
CN101190478A (en) Aluminium and aluminium alloy tubular welding wire for gas welding and preparation method thereof
CN102862002A (en) Al-Si-Zn-Ge low-melting-point aluminum based brazing filler metal and preparation method thereof
CN101362265B (en) Tin wire production method of welding material
CN102896436B (en) Sn-Ag-Cu lead-free solder containing Nd, Se and Ga
CN103831545B (en) Fluted body arc-welding and soldering aluminium alloy compound welding wire and manufacture method thereof
CN100463763C (en) Cu-P-Ag solder containing Ga, In and Ce
JPH03173729A (en) Copper alloy for use as brazing metal filler
CN102848100B (en) Low-silver Sn-Ag-Cu lead-free brazing filler metal containing Nd and Ga
CN105479036A (en) Metal particle reinforced type flux-cored wire and preparation method thereof
KR20150071054A (en) Corrosion-resistant brazing material containing flux
CN112621015B (en) Flux-cored aluminum brazing filler metal and preparation method thereof
CN102862001A (en) Sn-Ag-Cu lead-free solder containing Nd, Te and Ga
CN102848099B (en) Low-silver Sn-Ag-Cu lead-free brazing filler metal containing Pr, Ga and Se
CN106670681B (en) A kind of metal powder type flux-cored wire suitable for plate sheet welding
JP2005205466A (en) Filler metal wire for brazing aluminum alloy
CN100366376C (en) Leadless brazing filler metal containing cerium

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20140305