CN101554687B - Novel middle-temperature aluminum cored solder wire - Google Patents
Novel middle-temperature aluminum cored solder wire Download PDFInfo
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- CN101554687B CN101554687B CN200910098792XA CN200910098792A CN101554687B CN 101554687 B CN101554687 B CN 101554687B CN 200910098792X A CN200910098792X A CN 200910098792XA CN 200910098792 A CN200910098792 A CN 200910098792A CN 101554687 B CN101554687 B CN 101554687B
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Abstract
The invention discloses a Zn-Al cored solder wire containing Sr, Ag, Si and Li, which belongs to the welding materials of metal materials, and the chemical components thereof by weight percentage are as follows: 0.001 to 1.5 percent of Sr, 0.001 to 6.5 percent of Ag, 0.01 to 7 percent of Si, 0.001 to 0.1 percent of Li, 35.0 to 95.0 percent of Zn and the balance of Al. Zinc ingots, aluminum ingots,sycees, metal Li, industrial silicon and Al-Sr alloys sold in the market are used and mixed by adopting a normal smelting mode according to designed components; a 'covering agent' which is optimizedand screened is added during smelting or 'inert gases' are employed to protect smelting and casting, and steel bars can be obtained. Then wire materials can be obtained by squeezing and pulling the steel bars. A soldering flux is added in the wire materials so as to prepare 'flux-cored wires'. The product can be matched with a CsF-AlF3 soldering flux or KF-AlF3 soldering flux and be used for (soldering) welding an aluminum-aluminum structure and a copper-aluminum structure.
Description
One, technical field
A kind of Zn-Al cored solder wire that contains Sr, Ag, Si, Li cooperates commercially available CsF-AlF
3Brazing flux or KF-AlF
3Brazing flux is used for (pricker) welding of aluminium-aluminium or Solder for Al-Cu Joint Welding, belongs to the welding material of class of metal materials.
Two, background technology
At present, at hardware industry, household electric appliances, refrigeration industry, because the use amount of copper is huge, raising up of cathode copper price, make the demand of household electric appliances refrigerator, air-conditioner industry parts, system maker merchant " with aluminium for copper " along with, the aggravation of household electric appliances " production capacity surplus " and the continuous upgrading of " product price war ", more and more urgent; And at medium and small transformer industry, " with aluminium for copper " also puts into practice.In addition, in automobile industry, employing contains the high strength alumin ium alloy of magnesium, make the all-aluminium construction parts, to substitute copper structure, also be one of " focus " in the whole world manufacturing industry, still, a welding difficult problem that contains the high strength alumin ium alloy of magnesium gets more and more, and " urgently " needs the new welding material of research and development go to solve.
Because the heat exchange effect and the copper of aluminium are very approaching, processing characteristicies such as aluminium intensity have also had very big improvement, so the aluminium instead of copper has become possibility, the use of aluminium in the air-conditioning pipe at first realizes on the tube connector of machine inside and outside the air-conditioning, copper-Solder for Al-Cu Joint Welding composite construction air-conditioner tube connector realizes that the aluminium of refrigeration pipe system parts is for copper for the first time in the air-conditioner industry at home.Copper aluminium composite type air-conditioner connects machine pipe aluminum pipe part surface through after the preservative treatment, has both reached the quality of copper pipe for connecting air conditioner, has improved flexing resistance again, has alleviated product weight, has also significantly reduced product price.
In recent years, at home and abroad in the evolution of air conditioning for automobiles, automobile radiators, the lesson of many successful experience, failure, difficulty and demand to the high-strength aluminum alloy welding have caused various equivalent modifications and enterpriser's attention.The automotive air-conditioning system service condition is abominable more than domestic air conditioning, in air conditioning for automobiles, and the employing of the heat exchanger of high-efficiency compact (parallel flow type, stacked); Basically all adopt aluminium from compressor, heat exchanger, valve body to pipeline in the automotive air-conditioning system, this just requires intensity of aluminum alloy enough high, weight is also light, corrosion resistance and good, therefore, Welding Problems for the novel aluminum alloy that satisfies above-mentioned requirements and research and develop, adopt, also become simultaneously to restrict one of novel aluminum alloy material, novel aluminum alloy structure applications " key technology ", the purpose of this invention, attempt exactly to seek the approach that solves above-mentioned welding " key technology " from adopting the angle of novel welding material.
Though in recent years, Korea S, the U.S., Germany have developed " copper-aluminium, aluminium-aluminium soldering flux-cored wire " in succession and have entered Chinese market, but are not subjected to user's popular welcome, reason wherein, except costing an arm and a leg, mainly be technical many weak points that still have on the one hand.Wherein, major defect is 1) solder fusing point (generally having only 380 ℃～420 ℃) on the low side; 2) wetability, permeability are relatively poor.
At above-mentioned deficiency, discover, in Zn-Al alloy, Ag, Si, the Li that adds trace not only can significantly improve the fusing point of Zn-Al alloy, but also can significantly improve Zn-Al alloy in high-strength aluminum alloy wettability of the surface, permeability.Can improve the mechanical property of Zn-Al alloy pricker (weldering) seam in addition, particularly when brazed copper-aluminium alloy, the wetability on copper-aluminium alloy, permeability are that the flux-cored wire of main component has significant improvement with the Zn-Al alloy.Therefore, the realization of this invention had both gone for the welding of aluminium-constructed of aluminium spare, can be used for the welding of copper-constructed of aluminium again, thereby satisfied China's household electric appliances, refrigeration industry and other relevant industries new product, the new construction needs to solder technology.
Three, summary of the invention
The purpose of this invention provides a kind of good mechanical properties of fusing point wetability, superior permeability, pricker (weldering) seam about 480 ℃-500 ℃, on the high-strength aluminum alloy surface and on copper-aluminium alloy of brazing alloy, both go for the welding of aluminium-constructed of aluminium spare, can be used for novel temperature (about the 500 ℃) aluminium solder of the welding of copper-constructed of aluminium again.
For this reason, a kind of Zn-Al cored solder wire that contains Sr, Ag, Si, Li of this invention belongs to the welding material of class of metal materials.Its chemical composition by mass percent is: 0.001%～1.5% Sr, 0.001%～6.5% Ag, 0.01%～7.0% Si, 0.001%～0.1% Li, 35.0%～95.0% Zn, surplus is a warm aluminum cored solder wire in Al novel, has promptly satisfied above-mentioned requirements.
" warm aluminum cored solder wire in novel " of the present invention; adopt commercially available zinc ingot metal, aluminium ingot, silver ingot, metal Li, industrial silicon, al-sr alloy; adopt conventional smelting mode; press the design mix proportioning; add during smelting through optimizing screening definite " coverture " or adopting " inert gas " protection to smelt, cast, can obtain bar.By extruding, drawing, promptly obtain a material, also can add soldering flux, make " flux-cored wire ".The fusing point of product of the present invention can cooperate commercially available CsF-AlF about 480 ℃-500 ℃
3Brazing flux or KF-AlF
3Brazing flux is used for (pricker) welding of aluminium-constructed of aluminium spare and copper-constructed of aluminium spare.
Improve existing Zn-Al alloy solder fusing point (generally having only 380 ℃～420 ℃) on the low side in order to reach, wetability, the deficiency that permeability is relatively poor, through a large amount of " screening test ", determined to add the Ag of trace at last, Si, Li is in order to improve the fusing point of Zn-Al alloy, play again simultaneously improve Zn-Al alloy in the high-strength aluminum alloy wettability of the surface, infiltrative purpose, can also improve simultaneously the mechanical property of Zn-Al alloy pricker (weldering) seam, particularly reach when brazed copper-aluminium alloy the wetability on copper-aluminium alloy, permeability is the purpose that the flux-cored wire of main component has significant improvement with the Zn-Al alloy.Through " optimizing components " and analysis of experiments, determined the mass percent proportioning of " warm aluminum cored solder wire in novel " composition by these claims.
Four, description of drawings
Fig. 1: the metallographic microstructure of Zn-Al alloy (containing 95.0%Zn, surplus is aluminum cored solder wire pricker (weldering) the seam microscopic structure (400 *) of Al).
Fig. 2: contain 0.03%Sr, 3.0%Ag, 1.5%Si, 0.02%Li, 75.0%Zn, surplus is aluminum cored solder wire pricker (weldering) the seam microscopic structure (400 *) of Al.With containing 95.0%Zn, surplus is that aluminum cored solder wire pricker (weldering) the seam microscopic structure of Al is compared, and " warm aluminum cored solder wire in novel " pricker (weldering) stitches the obvious refinement of microscopic structure crystal grain.
Five, specific embodiments
This invention has mainly solved following critical problem:
1) adds trace alloying element Ag, Si, Li in order to improve the fusing point of Zn-Al alloy.Because " copper-aluminium, aluminium-aluminium soldering flux-cored wire " its fusing point of developing in succession is generally all at 380 ℃～420 ℃ both at home and abroad, individual other fusing point can reach 450 ℃～460 ℃, still, and with commercially available CsF-AlF
3Brazing flux or KF-AlF
3Brazing flux is compared, and is still on the low side.Documents and materials show, commercially available CsF-AlF
3The fusion temperature of brazing flux is not less than 480 ℃, KF-AlF
3The brazing flux fusion temperature is not less than 577 ℃.Consider from the basic principle of soldering, select CsF-AlF respectively for use
3Brazing flux or KF-AlF
3During brazing flux, the fusion temperature of corresponding solder should be respectively 〉=480 ℃, 〉=577 ℃ optimum.The present invention can make the fusing point of " warm aluminum cored solder wire in novel " reach 500 ℃, 600 ℃ respectively by regulating the content of Zn, Al and Ag, Si, Li so that " warm aluminum cored solder wire in novel " respectively with CsF-AlF
3Brazing flux or KF-AlF
3Brazing flux reaches the effect of " optimum Match ".
2) find through 10 groups of about 150 alloy formula experimental studies, add micro-Ag, Si, Li in the fusing point that improves Zn-Al alloy, also have the wetability on high-strength aluminum alloy surface and copper-constructed of aluminium spare of improving Zn-Al alloy, infiltrative effect, particularly " warm aluminum cored solder wire in novel " of the present invention cooperated CsF-AlF
3Brazing flux or KF-AlF
3Brazing flux, when 500 ℃, 600 ℃ soldering coppers-constructed of aluminium spare, the adding of Ag, Si, Li element is to improving " warm aluminum cored solder wire in novel " permeance property highly significant between copper-aluminium respectively.But the addition of Ag, Si, Li must strictly be controlled, and the minimum flow of Ag, Li can be low to moderate 0.001%, but maximum amount is respectively 6.5%, 0.1%.And the minimum flow of Si can only be low to moderate 0.01%, but maximum amount can not surpass 7.0%.
3) test is found, " warm aluminum cored solder wire in novel " in the composition range of optimizing, processing characteristics is relatively poor, particularly occurs " fracture of wire " phenomenon in " drawing " process easily.Therefore, find, add a certain amount of Sr element, can reduce even avoid the generation of " fracture of wire " phenomenon through overtesting.Test finds that the addition of Sr should be controlled at scope the best of 0.001%～1.5%.
Compare with former studies, creativeness of the present invention is:
One, discovered and proved that Ag, Si, the acting in conjunction of Li element not only can improve the fusing point of Zn-Al alloy, but also can improve " warm aluminum cored solder wire in novel " wetability on high-strength aluminum alloy surface and copper-constructed of aluminium spare, infiltrative effect.While has been carried out deep, careful research at the refinement problem of the Zn-Al alloy microscopic structure that interpolation elements A g, Si, Li are caused, thereby obtained a kind of " warm aluminum cored solder wire in novel " novel, that have premium properties, for the needs that satisfy high-strength aluminum alloy, copper-constructed of aluminium spare welding provide a kind of novel middle temperature welding material.
It needs to be noted, discover: " industrial silicon " that adds during smelting, must satisfy " one-level or the superfine " product among the GB/T2881-2008 " industrial silicon ", not influence the performance of the present invention's " warm aluminum cored solder wire in novel " to guarantee the Fe that brings in the industrial silicon, the amount of Ca impurity.Granularity should be in 10 orders～60 order scopes, to guarantee that adding fashionable Si is oxidized to SiO
2Amount the least possible, thereby guarantee the present invention's's " warm aluminum cored solder wire in novel " performance.
Two, the tensile strength of pricker (weldering) seam is brought up to 95Mpa by (three groups of data average computation) 60MPa; Pricker (weldering) seam bend test, flawless after the test specimen flexibility reaches 180 °; Pricker (weldering) is sewn in the water pressure test maximum and bears pressure and can reach 21MPa (at aluminum pipe position cracking).By to microstructure observation, the Zn-Al alloy pricker (weldering) of having found to add Sr, Ag, Si, Li stitches the obvious refinement of microscopic structure (referring to Fig. 1 and Fig. 2).By the knowledge of " metallography " " refined crystalline strengthening " as can be known, after Sr, Ag, Si, Li joined in the Zn-Al alloy, the reason that pricker (weldering) seam mechanical property improves was the cause of the obvious refinement of microscopic structure.
According to the quality recipe ratio of " warm aluminum cored solder wire in novel " of the present invention, narration the specific embodiment of the present invention.
Embodiment one
A kind of Zn-Al cored solder wire that contains Sr, Ag, Si, Li, its chemical composition by mass percent is: 0.001% Sr, 3.5% Ag, 2.0% Si, 0.1% Li, 75.0% Zn, surplus is Al." the warm aluminum cored solder wire in novel " that the mentioned component proportioning obtains cooperates commercially available CsF-AlF
3Brazing flux or KF-AlF
3Brazing flux, the good mechanical performance surperficial and wetability, superior permeability, pricker (weldering) seam on copper-aluminium alloy at high-strength aluminum alloy.
Embodiment two
A kind of Zn-Al cored solder wire that contains Sr, Ag, Si, Li, its chemical composition by mass percent is: 0.01% Sr, 6.5% Ag, 3.0% Si, 0.001% Li, 65.0% Zn, surplus is Al." the warm aluminum cored solder wire in novel " that the mentioned component proportioning obtains cooperates commercially available CsF-AlF
3Brazing flux or KF-AlF
3Brazing flux, the good mechanical performance surperficial and wetability, superior permeability, pricker (weldering) seam on copper-aluminium alloy at high-strength aluminum alloy.
Embodiment three
A kind of Zn-Al cored solder wire that contains Sr, Ag, Si, Li, its chemical composition by mass percent is: 1.5% Sr, 0.001% Ag, 7.0% Si, 0.1% Li, 55.0% Zn, surplus is Al." the warm aluminum cored solder wire in novel " that the mentioned component proportioning obtains cooperates commercially available CsF-AlF
3Brazing flux or KF-AlF
3Brazing flux, the good mechanical performance surperficial and wetability, superior permeability, pricker (weldering) seam on copper-aluminium alloy at high-strength aluminum alloy.
Embodiment four
A kind of Zn-Al cored solder wire that contains Sr, Ag, Si, Li, its chemical composition by mass percent is: 0.5% Sr, 0.1% Ag, 0.01% Si, 0.1% Li, 95.0% Zn, surplus is Al." the warm aluminum cored solder wire in novel " that the mentioned component proportioning obtains cooperates commercially available CsF-AlF
3Brazing flux or KF-AlF
3Brazing flux, the good mechanical performance surperficial and wetability, superior permeability, pricker (weldering) seam on copper-aluminium alloy at high-strength aluminum alloy.
Embodiment five
A kind of Zn-Al cored solder wire that contains Sr, Ag, Si, Li, its chemical composition by mass percent is: 1.2% Sr, 5.0% Ag, 5.5% Si, 0.1% Li, 35.0% Zn, surplus is Al." the warm aluminum cored solder wire in novel " that the mentioned component proportioning obtains cooperates commercially available CsF-AlF
3Brazing flux or KF-AlF
3Brazing flux, the good mechanical performance surperficial and wetability, superior permeability, pricker (weldering) seam on copper-aluminium alloy at high-strength aluminum alloy.
Embodiment six
A kind of Zn-Al cored solder wire that contains Sr, Ag, Si, Li, its chemical composition by mass percent is: 1.0% Sr, 6.0% Ag, 5.5% Si, 0.1% Li, 45.0% Zn, surplus is Al." the warm aluminum cored solder wire in novel " that the mentioned component proportioning obtains cooperates commercially available CsF-AlF
3Brazing flux or KF-AlF
3Brazing flux, the good mechanical performance surperficial and wetability, superior permeability, pricker (weldering) seam on copper-aluminium alloy at high-strength aluminum alloy.
Embodiment seven
A kind of Zn-Al cored solder wire that contains Sr, Ag, Si, Li, its chemical composition by mass percent is: 0.3% Sr, 4.0% Ag, 2.5% Si, 0.01% Li, 85.0% Zn, surplus is Al." the warm aluminum cored solder wire in novel " that the mentioned component proportioning obtains cooperates commercially available CsF-AlF
3Brazing flux or KF-AlF
3Brazing flux, the good mechanical performance surperficial and wetability, superior permeability, pricker (weldering) seam on copper-aluminium alloy at high-strength aluminum alloy.
Embodiment eight
A kind of Zn-Al cored solder wire that contains Sr, Ag, Si, Li, its chemical composition by mass percent is: 0.8% Sr, 2.0% Ag, 2.2% Si, 0.03% Li, 70.0% Zn, surplus is Al." the warm aluminum cored solder wire in novel " that the mentioned component proportioning obtains cooperates commercially available CsF-AlF
3Brazing flux or KF-AlF
3Brazing flux, the good mechanical performance surperficial and wetability, superior permeability, pricker (weldering) seam on copper-aluminium alloy at high-strength aluminum alloy.
Embodiment nine
A kind of Zn-Al cored solder wire that contains Sr, Ag, Si, Li, its chemical composition by mass percent is: 0.05% Sr, 0.01% Ag, 2.2% Si, 0.03% Li, 74.0% Zn, surplus is Al." the warm aluminum cored solder wire in novel " that the mentioned component proportioning obtains cooperates commercially available CsF-AlF
3Brazing flux or KF-AlF
3Brazing flux, the good mechanical performance surperficial and wetability, superior permeability, pricker (weldering) seam on copper-aluminium alloy at high-strength aluminum alloy.
Embodiment ten
A kind of Zn-Al cored solder wire that contains Sr, Ag, Si, Li, its chemical composition by mass percent is: 0.05% Sr, 0.001% Ag, 0.02% Si, 0.01% Li, 64.0% Zn, surplus is Al." the warm aluminum cored solder wire in novel " that the mentioned component proportioning obtains cooperates commercially available CsF-AlF
3Brazing flux or KF-AlF
3Brazing flux, the good mechanical performance surperficial and wetability, superior permeability, pricker (weldering) seam on copper-aluminium alloy at high-strength aluminum alloy.
Embodiment 11
A kind of Zn-Al cored solder wire that contains Sr, Ag, Si, Li, its chemical composition by mass percent is: 1.5% Sr, 0.1% Ag, 3.0% Si, 0.01% Li, 60.0% Zn, surplus is Al." the warm aluminum cored solder wire in novel " that the mentioned component proportioning obtains cooperates commercially available CsF-AlF
3Brazing flux or KF-AlF
3Brazing flux, the good mechanical performance surperficial and wetability, superior permeability, pricker (weldering) seam on copper-aluminium alloy at high-strength aluminum alloy.
Embodiment 12
A kind of Zn-Al cored solder wire that contains Sr, Ag, Si, Li, its chemical composition by mass percent is: 0.2% Sr, 0.1% Ag, 3.0% Si, 0.01% Li, 88.0% Zn, surplus is Al." the warm aluminum cored solder wire in novel " that the mentioned component proportioning obtains cooperates commercially available CsF-AlF
3Brazing flux or KF-AlF
3Brazing flux, the good mechanical performance surperficial and wetability, superior permeability, pricker (weldering) seam on copper-aluminium alloy at high-strength aluminum alloy.
Embodiment 13
A kind of Zn-Al cored solder wire that contains Sr, Ag, Si, Li, its chemical composition by mass percent is: 0.2% Sr, 0.1% Ag, 2.0% Si, 0.01% Li, 83.0% Zn, surplus is Al." the warm aluminum cored solder wire in novel " that the mentioned component proportioning obtains cooperates commercially available CsF-AlF
3Brazing flux or KF-AlF
3Brazing flux, the good mechanical performance surperficial and wetability, superior permeability, pricker (weldering) seam on copper-aluminium alloy at high-strength aluminum alloy.
Embodiment 14
A kind of Zn-Al cored solder wire that contains Sr, Ag, Si, Li, its chemical composition by mass percent is: 0.1% Sr, 0.01% Ag, 0.01% Si, 0.001% Li, 84.0% Zn, surplus is Al." the warm aluminum cored solder wire in novel " that the mentioned component proportioning obtains cooperates commercially available CsF-AlF
3Brazing flux or KF-AlF
3Brazing flux, the good mechanical performance surperficial and wetability, superior permeability, pricker (weldering) seam on copper-aluminium alloy at high-strength aluminum alloy.
Embodiment 15
A kind of Zn-Al cored solder wire that contains Sr, Ag, Si, Li, its chemical composition by mass percent is: 0.1% Sr, 0.01% Ag, 0.01% Si, 0.001% Li, 74.5% Zn, surplus is Al." the warm aluminum cored solder wire in novel " that the mentioned component proportioning obtains cooperates commercially available CsF-AlF
3Brazing flux or KF-AlF
3Brazing flux, the good mechanical performance surperficial and wetability, superior permeability, pricker (weldering) seam on copper-aluminium alloy at high-strength aluminum alloy.
Claims (1)
1. Zn-Al cored solder wire that contains Sr, Ag, Si, Li, the welding material that belongs to class of metal materials, its chemical composition by mass percent is: 0.001%～1.5% Sr, 0.001%～6.5% Ag, 0.01%～7.0% Si, 0.001%～0.1% Li, 35.0%～95.0% Zn, surplus is Al;
The industrial silicon that adds during smelting must satisfy one-level or select quality among the GB/T2881-2008 " industrial silicon ", do not influence the performance of described cored solder wire to guarantee the Fe that brings in the industrial silicon, the amount of Ca impurity, and granularity is 10 orders～60 orders.
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Families Citing this family (8)
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| CN102161136B (en) * | 2011-04-18 | 2013-02-13 | 兰州威特焊材炉料有限公司 | SAL2090 aluminum lithium alloy tungsten inert gas (TIG)/ metal inert gas (MIG) welding wire |
| CN102189351B (en) * | 2011-04-18 | 2013-04-17 | 兰州威特焊材炉料有限公司 | SAL1420 aluminium lithium alloy TIG/MIG welding wire |
| CN102513722B (en) * | 2012-01-10 | 2014-05-14 | 南京航空航天大学 | Medium temperature Zn-Al solder containing Sr, Si, Ti, Ni and P and having high air tightness |
| 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 |
| 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 |
| CN106624440B (en) * | 2016-12-14 | 2019-02-19 | 安徽华众焊业有限公司 | The flux-cored wire of copper aluminium welding |
| CN110170766A (en) * | 2019-05-29 | 2019-08-27 | 新乡市七星钎焊科技有限公司 | 30 silver medal solders containing indium of one kind and its preparation process |
| CN114406518B (en) * | 2022-01-11 | 2023-08-01 | 金华市双环钎焊材料有限公司 | Transition layer welding wire for preparing aluminum-steel composite structure and preparation and arc surfacing method |
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| CN87106949A (en) * | 1987-10-20 | 1988-07-13 | 国家机械工业委员会上海材料研究所 | Air heat exchanger is with brazing material and brazing flux |
| CN1039986A (en) * | 1989-04-08 | 1990-02-28 | 浙江大学材料制造厂 | A kind of copper-based polybasic alloy soldering materials |
| US6168069B1 (en) * | 1997-07-18 | 2001-01-02 | Endress +Hauser Flowtec Ag | Method of brazing titanium to stainless steel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87106949A (en) * | 1987-10-20 | 1988-07-13 | 国家机械工业委员会上海材料研究所 | Air heat exchanger is with brazing material and brazing flux |
| CN1039986A (en) * | 1989-04-08 | 1990-02-28 | 浙江大学材料制造厂 | A kind of copper-based polybasic alloy soldering materials |
| US6168069B1 (en) * | 1997-07-18 | 2001-01-02 | Endress +Hauser Flowtec Ag | Method of brazing titanium to stainless steel |
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| 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 | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 312400 Zhejiang city of Shaoxing province Shengzhou City Town Industrial Zone Patentee after: ZHEJIANG XINRUI WELDING SCIENCE AND TECHNOLOGY CO., LTD. Address before: Zhejiang Xinrui welding material limited company in Zhejiang province Shengzhou city agglomeration 312400 Town Industrial Patentee before: Zhejiang Xinrui Welding Material Co., Ltd. |