CN102703765B - A kind of High resistivity nickel wire and preparation method thereof - Google Patents
A kind of High resistivity nickel wire and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of High resistivity nickel wire, described nickel wire comprises Ni, Mn, Si, Ti and rare earth, and it comprises by mass percentage: Ni:99.5 ~ 99.94%, Mn:0.035 ~ 0.26%, Si:0.026 ~ 0.24%, Ti:< 0.03%, rare earth: < 0.03%.Present invention also offers the preparation method of nickel wire described above.The resistivity > 0.092 Ω mm of nickel wire of the present invention
2/ m, apparently higher than the resistivity 0.07 Ω mm of existing GB nickel wire
2/ m, temperature factor is stablized, and described temperature factor is 0.0045+0.0002, solves GB nickel wire temperature factor unstable, and for heating the problem that industry causes electrical equipment work-ing life short, compared with prior art, the present invention has the effect of highly significant.
Description
Technical field
The present invention relates to metal material processing technical field, particularly, the present invention relates to a kind of High resistivity nickel wire and preparation method thereof.
Background technology
Pure nickel is a kind of silvery white metal, and have excellent corrosion-resistant, higher electrovacuum performance and electromagnetic control performance, be widely used in the aspects such as chemical industry, mechano-electronic, food.Pure nickel has excellent welding property and processing characteristics.
Pure nickel has good electroconductibility and solidity to corrosion, and its fusing point is high, and the machining property had and plasticity; The impact that anticathode emissivity has had, and have suitable specific resistance, radiation coefficient is good, and heat-conduction coefficient is large, therefore, is used for corrosion-resistant element.The strength member of precision instrument structure and medical facilities, as the anti-corrosion equipment of chemical industry, produces the filtering net (cloth) of highly basic, and the welding electrode core silk of the welding pig iron, bulb
Station-service lamp base goes between, heating rod outlet line etc.Meanwhile, nickel wire is widely used in electric equipment products, is the preferred material making resistance element.Nickel wire electrovacuum material has good processability; (the melting welding of fierce property; soldering), electrodepositable, and have suitable line coefficient of expansion; for making as corrosion resistance strong electron ray tube; bulb, fluorescent lamp, anode; partition, electrode suppor illumination, wireless apparatus, netting, chemical industry, oil, power, aviation, ocean exploitation and environment protection etc.Nickel wire is one of important corrosion resistant material being used as the departments such as the structural part of anti-corrosion instrument and instrument, illumination, wireless apparatus, netting, chemical industry, oil, power, aviation, ocean exploitation and environment protection mainly.
Existing GB nickel wire is generally become to be grouped into by Ni, Co, Cu, Mn, C, Mg etc., resistivity is on the low side, temperature factor is unstable shortcoming that it has.Its resistivity of the nickel wire of national standard only has 0.07 Ω mm
2/ m, this nickel wire is used for the industry such as braiding and is perhaps suitable for, but is used in heater strip industry, its temperature factor instability, fluctuatedly will cause the dieseling of heater strip or shorten work-ing life.
The chemical stability of nickel wire is high, there is the production technique of multiple nickel wire at present both at home and abroad, but its main production technique is roughly identical, as follows: sheet nickel-shearing-induction furnace melting-cast ingot casting-ingot scalping-heating-forging-forging stock reconditioning-heating-rolling-thermal treatment-pickling-cleaning-drawing-process wire-annealing-drawing-finished product nickel wire.
In prior art, there are the following problems for the production technique of nickel wire: the burr phenomena when impurity owing to producing in fusion process in drawing process causes drawing, causes wire broken rate to improve.
CN102251201A discloses a kind of preparation method of high nickel wire, and the technical process of the method is: sheet nickel-cut-heating rolling-welding-cold rolling-annealing-itemize-cold drawn-annealing-process wire-annealing-drawing-finished product nickel wire.The present invention is with short production cycle, efficiency is high, cost is low, loss is few, can meet the service requirements of electron trade to high nickel wire, and alternative existing smelting process produces the traditional technology of nickel wire, but it cannot meet the application of heater strip industry.
Summary of the invention
An object of the present invention is to provide a kind of High resistivity nickel wire, and its temperature factor of described nickel wire is stablized, and solves the problem that GB nickel wire temperature factor instability can not be used for heater strip industry.
In order to achieve the above object, present invention employs following technique means:
In order to improve the performance of existing nickel wire, High resistivity nickel wire of the present invention includes rare earth.
Rare earth element has lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), scandium (Sc) and yttrium (Y) totally 17 kinds of elements, and rare earth described in the present invention is selected from the mixture of a kind of in above-mentioned rare earth element or at least two kinds.The example of described rare earth has: lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), scandium (Sc) and yttrium (Y), the mixture of La and Ce, the mixture of Pr and Nd, the mixture of Pm and Sm, the mixture of Eu and Gd, the mixture of Tb and Dy, the mixture of Ho and Er, the mixture of Tm and Yb, the mixture of Lu and Sc, the mixture of Y and L, the mixture of Ce and Pr, the mixture of Nd and Pm, the mixture of Sm and Eu, the mixture of Gd and Tb, the mixture of Dy and Ho, the mixture of Er and Tm, the mixture of Yb and Lu, the mixture of Sc and Y, the mixture of La and Pr, the mixture of Ce and Nd, the mixture of Pm and Eu, the mixture of Nd and Gd, the mixture of Tb and Ho, the mixture of Er and Yb, the mixture of Lu and Y, La, the mixture of Ce and Pr, Nd, the mixture of Pm and Sm, Eu, the mixture of Gd and Tb, Tb, the mixture of Dy and Ho, Er, the mixture of Tm and Yb, Sc, the mixture of Y and La, Ce, the mixture of Pr and Nd, Pm, the mixture of Sm and Eu, Gd, the mixture of Tb and Dy, Ho, the mixture of Er and Tm, Yb, Lu, the mixture etc. of Sc and Y.Because the content of these elements in the earth's crust is rare, their oxide compound is close with soil color again, therefore is called rare earth element.
The effect adding rare earth in nickel wire is as follows: 1, reduce sulphur content in alloy; 2, heavy alloyed antioxidant property is carried; 3, heavy alloyed creep rupture strength is carried; 4, refined carbides, improve the homogeneity of carbide; 5, heavy alloyed corrosion resistance nature can be carried; 6, the welding property of alloy can be improved, reduce the probability that cracks of B alloy wire, prepare in drawing process not fracture of wire so that follow-up, improve the over-all properties of product.
The mass percent that described rare earth accounts for nickel wire is < 0.03%, such as 0.011%, 0.012%, 0.013%, 0.014%, 0.015%, 0.016%, 0.017%, 0.018%, 0.019%, 0.020%, 0.025%, 0.027%, 0.028%, preferably 0.013 ~ 0.030%, further preferably 0.015 ~ 0.025%.
Meanwhile, nickel wire of the present invention also includes Si.Si is as the reductor in superalloy melting, and the number of Si element affects the height of resistivity but presents parabolical effect.The present invention improves the resistivity of nickel wire by adding Si element.
The mass percent that described Si accounts for nickel wire is 0.026 ~ 0.24%, such as 0.10%, 0.11%, 0.12%, 0.13%, 0.14%, 0.15%, 0.16%, 0.17%, 0.18%, 0.19%, 0.20%, 0.24%, 0.23%, preferably 0.10 ~ 0.20%, further preferably 0.15 ~ 0.20%.
As optimal technical scheme, described nickel wire comprises by mass percentage:
Further preferably, described nickel wire comprises by mass percentage:
Further preferred, described nickel wire comprises by mass percentage:
The mass percent that described Ni accounts for nickel wire is 99.5 ~ 99.94%, such as 99.52%, 99.60%, 99.62%, 99.65%, 99.72%, 99.75%, 99.78%, 99.83%, 99.85%, 99.88%, 99.92%, 99.93%, 99.94%, preferably 99.5 ~ 99.92%, further preferably 99.5 ~ 99.90%.
The mass percent that described Mn accounts for nickel wire is 0.035 ~ 0.26%, such as 0.12%, 0.14%, 0.16%, 0.18%, 0.20%, 0.22%, 0.24%, 0.26%, preferably 0.10 ~ 0.26%, further preferably 0.15 ~ 0.26%.Described manganese is electrolytic metal Mn, and the comparision contents of himself is high, requires strict steel and alloy to iron, silicon, carbon content, all will select the electrolytic metal Mn that this kind of production method produces, range of application: abros, nickel base superalloy.
The mass percent that described Ti accounts for nickel wire is < 0.03%, such as 0.015%, 0.020%, 0.025%, 0.026%, 0.028%, 0.029%, preferably 0.013 ~ 0.030%, further preferably 0.015 ~ 0.025%, additive when it is superalloy melting.
The typical but non-limiting described nickel wire of the present invention comprises by mass percentage:
Or,
" comprising " of the present invention, mean it except described component, can also comprise other components, these other components give described nickel wire different characteristics.In addition, " comprising " of the present invention, can also replace with enclosed " being " or " by ... composition ".No matter which kind of composition nickel wire of the present invention comprises, and the mass percent sum of described nickel wire is 100%.
Nickel wire of the present invention can only be made up of Ni, Mn, Si, Ti, rare earth, and meanwhile, nickel wire of the present invention can also include other composition.
Such as nickel wire of the present invention can also comprise Cu, the mass percent that described Cu accounts for nickel wire is 0.05 ~ 0.30%, such as 0.06%, 0.07%, 0.08%, 0.09%, 0.10%, 0.12%, 0.14%, 0.16%, 0.18%, 0.20%, 0.22%, 0.24%, 0.26%, 0.28%, 0.29%.
Such as nickel wire of the present invention can also comprise C, and the mass percent that described C accounts for nickel wire is 0.06 ~ 0.15%, and such as 0.07%, 0.08%, 0.09%, 0.10%, 0.115,0.12%, 0.13%, 0.14%.
Such as nickel wire of the present invention can also comprise Fe, the mass percent that described Fe accounts for nickel wire is 0.01 ~ 0.20%, such as 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.10%, 0.11%, 0.12%, 0.13%, 0.14%, 0.15%, 0.16%, 0.17%, 0.18%, 0.19%.
Described Cu, C and Fe that can comprise can be included in nickel wire simultaneously, also can select one of them or at least two or more mixtures.
The example of described nickel wire has: Ni, Mn, Si, Ti, rare earth, Cu; Ni, Mn, Si, Ti, rare earth, C; Ni, Mn, Si, Ti, rare earth, Fe; Ni, Mn, Si, Ti, rare earth, Cu, C; Ni, Mn, Si, Ti, rare earth, Cu, Fe; Ni, Mn, Si, Ti, rare earth, C, Fe; Ni, Mn, Si, Ti, rare earth, Cu, C, Fe.The mass percent that each component of described nickel wire accounts for nickel wire is described above, and the present invention does not repeat them here.
Nickel of the present invention is electrolytic nickel, preferred Ni9996, and it is used as the superalloy smelting important trade mark nickel wire in actual production.
Two of object of the present invention is the preparation method providing a kind of nickel wire as above, and described method comprises the steps:
(1) carry out mixed smelting according to formula described above, by the ingot casting peeling obtained, forge;
(2) rear blank drawing will be forged, drawing again, annealing, so repeat Drawing-anneal repeatedly, until obtain the nickel wire of required specification.
If except Ni, Mn, Si, Ti, rare earth are also containing Cu, C and Fe in described nickel wire, then step (1) mixed smelting then needs to add other elements contained, those skilled in the art can select according to the example of above-mentioned listed nickel wire, and the present invention will not enumerate at this.
First will forge rear blank drawing and obtain having the filament of certain diameter in the present invention's method steps described above (2), and then repeat drawing, annealing process.Forge after rear blank drawing obtains the filament of certain diameter herein and do not anneal, directly carry out the repetitive process of drawing, annealing.Described certain diameter is the arbitrary diameter being greater than final any products specification, and those skilled in the art can select the concrete numerical value of certain diameter herein voluntarily according to the specification of the nickel wire finally expecting obtaining, the present invention is in this no limit.
By heating make metal by solid state transformation to liquid state and make satisfactory technological process such as its temperature, composition etc.Melting described in step (1) realizes by adopting vacuum intermediate-frequency induction melting furnace.Described vacuum intermediate-frequency induction melting furnace is purchased from Shen, Shanghai electric furnace equipment cold-working company, and model is ZG-25.
Ingot casting peeling makes the impurity major part produced during melting be removed, and decreases burr phenomena during subsequent handling drawing, decreases wire broken rate.
Forge after ingot casting peeling again, then carry out drawing, annealing can obtain nickel wire finished product.Preferably, in step (2), preferably obtaining the filament that diameter is 8.0mm, drawing again by forging rear blank drawing, annealing, so repeating Drawing-anneal repeatedly, until obtain the nickel wire of required specification;
Multiplicity those skilled in the art of described Drawing-anneal can select voluntarily according to the experience of oneself, and preferably, the number of times that Drawing-anneal of the present invention repeats is 1 ~ 5 time, and such as 2,3,4,5, preferably 2 ~ 5 times, preferably 4 ~ 5 times further.Annealing can improve tensile strength and the unit elongation of nickel wire.Those skilled in the art can select how drawing and annealing voluntarily, and the present invention is only preferred herein, and non-limiting.
As further preferred version, in order to obtain the nickel wire that diameter is 0.15mm, obtain after diameter is the filament of 8.0mm by forging rear blank drawing, drawing obtains the filament after annealing that diameter is 4.0mm again, drawing obtains the filament after annealing that diameter is 1.0mm again, drawing obtains the filament after annealing that diameter is 0.3mm again, and drawing obtains the filament after annealing that diameter is 0.15mm again, finally obtains the filament that diameter is 0.15mm.
In conjunction with aforesaid method, to be the preparation method of the nickel wire of 0.15mm be the typical but non-limiting diameter of the present invention:
(1) by Ni, Mn, Si, Ti, rare earth mixed smelting, by the ingot casting peeling obtained, forge;
(2) obtain after diameter is the filament of 8.0mm by forging rear blank drawing, drawing obtains the filament after annealing that diameter is 4.0mm again, drawing obtains the filament after annealing that diameter is 1.0mm again, drawing obtains the filament after annealing that diameter is 0.3mm again, drawing obtains the filament after annealing that diameter is 0.15mm again, finally obtains the filament that diameter is 0.15mm.
The diameter controlling the filament obtained in the number of times of described Drawing-anneal and drawing process can be determined according to the specification of final required nickel wire finished product.
Step (2) described technique is: will forge rear blank drawing, drawing again, annealing, so repeats Drawing-anneal repeatedly, until obtain the nickel wire of required specification.The degree of described drawing can be determined according to the diameter of nickel wire, such as, blank direct drawing can be obtained the specification of final required nickel wire, then anneal, can obtain final finished.Also after first blank can being drawn to the filament of certain diameter, and then Drawing-anneal, repeat Drawing-anneal process, in drawing process, filament diameter reduces, and finally obtains the nickel wire of required specification.Namely described certain diameter is greater than the arbitrary diameter of final specification.Described forge rear blank drawing after the filament that obtains do not need to carry out annealing process and directly can carry out drawing next time, all need after all the other drawings carry out annealing process and then carry out drawing, repeat the whole process of Drawing-anneal, until obtain the nickel wire of required specification.The repetition of described Drawing-anneal: namely refer to must be complete carry out Drawing-anneal process, just count and be repeated once, forge the repetition of rear blank drawing due to the Drawing-anneal namely directly starting next step that do not carry out annealing, therefore, the repetitive process of Drawing-anneal is not can be regarded as in the drawing forging rear blank described herein, illustrate accordingly, those skilled in the art clearly can understand the calculating of the multiplicity of Drawing-anneal of the present invention.
Compared with prior art, the present invention has following beneficial effect:
(1) the present invention is by adding Si and rare earth in nickel wire, improves the resistivity of nickel wire;
(2) blank that melting first obtains by the method preparing nickel wire of the present invention after melting carries out peeling, eliminates the impurity produced in most of fusion process, decreases burr phenomena during follow-up drawing, decrease wire broken rate;
(3), in the preparation process of the nickel wire of 0.15mm of the present invention, owing to annealing after drawing, improve tensile strength and the unit elongation of final nickel wire;
(4) add annealing operation in the preparation process of nickel wire of the present invention, improve tensile strength and the unit elongation of final nickel wire;
(5) the resistivity > 0.092 Ω mm of nickel wire of the present invention
2/ m, apparently higher than the resistivity 0.07 Ω mm of existing GB nickel wire
2/ m.The temperature factor of nickel wire of the present invention is stablized, and described temperature factor is 0.0045+0.0002, and solve the problem that GB nickel wire coefficient instability can not be used for heating industry, compared with prior art, the present invention has the effect of highly significant.
Embodiment
For better the present invention being described, be convenient to understand technical scheme of the present invention, typical but non-limiting embodiment of the present invention is as follows:
Described in embodiment of the present invention 1-4 and comparative example 1-2, the composition of nickel wire is as shown in table 1.
The composition of nickel wire described in table 1 embodiment 1-4 and comparative example 1-2
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Comparative example 1 | Comparative example 2 | |
| Ni% | 99.52 | 99.937 | 99.552 | 99.52 | 99.543 | 99.69 |
| Mn% | 0.26 | 0.035 | 0.15 | 0.24 | 0.26 | 0.26 |
| Si% | 0.17 | 0.026 | 0.24 | 0.15 | 0.17 | |
| Ti% | 0.027 | 0.001 | 0.029 | 0.027 | 0.027 | 0.027 |
| Rare earth % | 0.023 | 0.001 | 0.029 | 0.023 | 0.023 | |
| Fe% | 0.04 |
The preparation method of the nickel wire described in embodiment 1 is as described below:
(1) by Ni, Mn, Si, Ti, rare earth mixed smelting, by the ingot casting peeling obtained, forge;
(2) obtain after diameter is the filament of 8.0mm by forging rear blank drawing, drawing obtains the filament after annealing that diameter is 4.0mm again, drawing obtains the filament after annealing that diameter is 1.0mm again, drawing obtains the filament after annealing that diameter is 0.3mm again, drawing obtains the filament after annealing that diameter is 0.15mm again, finally obtains the filament that diameter is 0.15mm.
The preparation method of the nickel wire described in embodiment 2 is as described below:
(1) by Ni, Mn, Si, Ti, rare earth mixed smelting, by the ingot casting peeling obtained, forge;
(2) obtaining forging rear blank drawing the filament that diameter is 0.15mm, then annealing, obtaining the nickel wire that diameter is 0.15mm.
The preparation method of the nickel wire described in embodiment 3 is as described below:
(1) by Ni, Mn, Si, Ti, rare earth mixed smelting, by the ingot casting peeling obtained, forge;
(2) obtain after diameter is the filament of 4.0mm by forging rear blank drawing, drawing obtains the filament after annealing that diameter is 1.0mm again, drawing obtains the filament after annealing that diameter is 0.3mm again, drawing obtains the filament after annealing that diameter is 0.15mm again, finally obtains the filament that diameter is 0.15mm.
The preparation method of the nickel wire described in embodiment 4 is as described below:
(1) by Ni, Mn, Si, Ti, rare earth, Fe mixed smelting, by the ingot casting peeling obtained, forge;
(2) obtain after diameter is the filament of 8.0mm by forging rear blank drawing, drawing obtains the filament after annealing that diameter is 4.0mm again, drawing obtains the filament after annealing that diameter is 1.0mm again, drawing obtains the filament after annealing that diameter is 0.3mm again, drawing obtains the filament after annealing that diameter is 0.15mm again, finally obtains the filament that diameter is 0.15mm.
The preparation method of the nickel wire described in comparative example 1 is as described below:
(1) by Ni, Mn, Si, Ti mixed smelting, by the ingot casting peeling obtained, forge;
(2) obtain after diameter is the filament of 8.0mm by forging rear blank drawing, drawing obtains the filament after annealing that diameter is 4.0mm again, drawing obtains the filament after annealing that diameter is 1.0mm again, drawing obtains the filament after annealing that diameter is 0.3mm again, drawing obtains the filament after annealing that diameter is 0.15mm again, finally obtains the filament that diameter is 0.15mm.
The preparation method of the nickel wire described in comparative example 2 is as described below:
(1) by Ni, Mn, Ti, rare earth mixed smelting, by the ingot casting peeling obtained, forge;
(2) obtain after diameter is the filament of 8.0mm by forging rear blank drawing, drawing obtains the filament after annealing that diameter is 4.0mm again, drawing obtains the filament after annealing that diameter is 1.0mm again, drawing obtains the filament after annealing that diameter is 0.3mm again, drawing obtains the filament after annealing that diameter is 0.15mm again, finally obtains the filament that diameter is 0.15mm.
According to GB/T21653-2008, resistivity measurement is carried out to nickel wire described in embodiment 1-4 and comparative example 1-2, learns, the resistivity > 0.092 Ω mm of the nickel wire described in embodiment of the present invention 1-4
2/ m, apparently higher than the resistivity 0.07 Ω mm of existing GB nickel wire
2the resistivity of nickel wire described in/m and comparative example.The temperature factor of nickel wire of the present invention is stablized, and described temperature factor is 0.0045+0.0002, and solve the problem that GB nickel wire coefficient instability can not be used for heating industry, compared with prior art, the present invention has the effect of highly significant.
It should be noted that and understand, when not departing from the spirit and scope of the present invention required by accompanying claim, various amendment and improvement can be made to the present invention of foregoing detailed description.Therefore, the scope of claimed technical scheme is not by the restriction of given any specific exemplary teachings.
Applicant states, the present invention illustrates method detailed of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned method detailed, does not namely mean that the present invention must rely on above-mentioned method detailed and could implement.Person of ordinary skill in the field should understand, any improvement in the present invention, to equivalence replacement and the interpolation of ancillary component, the concrete way choice etc. of each raw material of product of the present invention, all drops within protection scope of the present invention and open scope.
Claims (11)
1. a High resistivity nickel wire, is characterized in that, described nickel wire comprises by mass percentage:
2. nickel wire as claimed in claim 1, it is characterized in that, described nickel is electrolytic nickel.
3. nickel wire as claimed in claim 2, it is characterized in that, described nickel is Ni9996.
4. nickel wire as claimed in claim 1, it is characterized in that, described manganese is electrolytic manganese.
5. the nickel wire preparation method as described in one of claim 1-4, is characterized in that, described method comprises the steps:
(1) carry out mixed smelting according to formula described above, by the ingot casting peeling obtained, forge;
(2) rear blank drawing will be forged, drawing again, annealing, so repeat Drawing-anneal repeatedly, until obtain the nickel wire of required specification.
6. method as claimed in claim 5, is characterized in that, melting described in step (1) realizes by adopting vacuum intermediate-frequency induction melting furnace.
7. method as claimed in claim 5, is characterized in that, preferably obtaining the filament that diameter is 8.0mm, drawing again by forging rear blank drawing in step (2), and annealing so repeats Drawing-anneal repeatedly, until obtain the nickel wire of required specification.
8. method as claimed in claim 5, is characterized in that, the number of times that Drawing-anneal repeats is 1 ~ 5 time.
9. method as claimed in claim 8, is characterized in that, the number of times that Drawing-anneal repeats is 2 ~ 5 times.
10. method as claimed in claim 9, is characterized in that, the number of times that Drawing-anneal repeats is 4 ~ 5 times.
11. methods as claimed in claim 5, it is characterized in that, obtain after diameter is the filament of 8.0mm by forging rear blank drawing, drawing obtains the filament after annealing that diameter is 4.0mm again, drawing obtains the filament after annealing that diameter is 1.0mm again, drawing obtains the filament after annealing that diameter is 0.3mm again, and drawing obtains the filament after annealing that diameter is 0.15mm again, finally obtains the filament that diameter is 0.15mm.
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| CN105127234B (en) * | 2015-09-09 | 2017-03-22 | 河北星耀稀有金属材料有限公司 | Processing method of niobium-zirconium alloy wire |
| CN113977029A (en) * | 2021-11-22 | 2022-01-28 | 连云港力升金属科技有限公司 | Welding method for welding nickel wire |
| CN114293037A (en) * | 2021-12-16 | 2022-04-08 | 江苏隆达超合金航材有限公司 | Vacuum induction melting process for improving yield of rare earth elements of high-temperature alloy |
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| CN101797679A (en) * | 2009-12-29 | 2010-08-11 | 林榆滨 | Method for manufacturing high-purity metal wire |
| CN102352453A (en) * | 2011-10-29 | 2012-02-15 | 重庆川仪自动化股份有限公司 | Resistance material capable of preventing overheat generation caused by excessive current |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101797679A (en) * | 2009-12-29 | 2010-08-11 | 林榆滨 | Method for manufacturing high-purity metal wire |
| CN102352453A (en) * | 2011-10-29 | 2012-02-15 | 重庆川仪自动化股份有限公司 | Resistance material capable of preventing overheat generation caused by excessive current |
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