CN102747238A - Production method of microalloyed tin bronze alloy - Google Patents
Production method of microalloyed tin bronze alloy Download PDFInfo
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- CN102747238A CN102747238A CN2012102493517A CN201210249351A CN102747238A CN 102747238 A CN102747238 A CN 102747238A CN 2012102493517 A CN2012102493517 A CN 2012102493517A CN 201210249351 A CN201210249351 A CN 201210249351A CN 102747238 A CN102747238 A CN 102747238A
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Abstract
The invention discloses a production method of microalloyed tin bronze alloy. The production method of the microalloyed tin bronze alloy includes the steps of firstly, subjecting alloy to smelting, thermal insulation, degassing, deslagging and refining in a smelting furnace; secondly, adding refiner to refined melt for microalloying; thirdly, performing alloy casting, namely subjecting the microalloyed melt to ingot casting; and fourthly, performing cold rolling and cogging, namely subjecting the alloy subjected to alloy casting to cold rolling so as to obtain deformed tin bronze alloy. Casting grain of the microalloyed tin bronze alloy produced by the production method is small in size, segregation degree of Sn in the alloy can be lowered, brittle cracking in rolling can be eliminated, and the alloy is highly plastic. Especially, the microalloyed castings can be directly subjected to cold rolling, and accordingly a homogenizing step in the existing production method is omitted, energy resources are economized, process flow is shortened, production efficiency is improved, and production cost is reduced.
Description
Technical field
The invention belongs to the Cu alloy material processing technique field, refer to a kind of preparation method of microalloying tin bronze alloys especially.
Background technology
Along with the development of electronic information, automobile and communication industry, be used for connector, elastic conduction alloy consumption is increasing.Copper base elastic alloy is widely used in various conductive elastic components such as electrical connector, spring, junctor, switch, contact owing to have good conduction, heat conductivility and favorable mechanical mechanical property.
Copper base elastic alloy is one type of structure function material with broad prospect of application, still is new and high technology, stratosphere in traditional industry no matter, and its demand increases severely day by day, and is increasingly high to its performance requriements simultaneously.Development through decades; In developed country; The elastic copper alloy Products Development has reached quite high level, and China all is in the status that falls behind relatively in research and production, and copper base elastic alloy commonly used still is tin-phosphor bronze, German silver and brass basically; The demand that not only quantitatively, still on quality product, can't adapt to industry high speed developments such as electronic information, automobile and telecommunications.
Traditional copper base elastic alloy tin bronze alloys is present widely used HS, snappiness, high property copper alloy because of it has advantages such as high intensity, elasticity, good conductive stability and thermal stresses relaxation property.But; Because Sn content is high in the tin bronze alloys; Ingot casting produces the negative segregation of serious dendritic segregation and Sn in castingprocesses, causes its plastic deformation ability poor, and present general working method is that horizontal casting is produced slab; And ingot casting carries out long-time high temperature annealing before machining deformation, and promptly homogenizing just can be carried out plastic working after handling (this process needs 25～30 hours usually).The energy consumption of homogenizing treating processes is big, technical process is long, production efficiency is low, production cost is high, do not meet modern industrialization produces desired efficient target.Domestic patent of invention CN87100204, CN91105605 have all adopted vacuum melting, but still have the uneven components phenomenon in the tissue of ingot casting, handle so still need carry out the long homogenizing of high temperature.
In addition, some patents have been carried out some and have been improved in the application of some tin bronze alloys both at home and abroad, to improve inhomogeneous some performance with alloy of alloy casting state structural constituent.For example domestic patent CN200410053071 adopts spray precipitation moulding method to produce the Cu-15Ni-8Sn-3.5Y alloy, and this patent is less through the tin bronze alloys component segregation of this method preparation, alloy functional.Patent CN03151047, CN101517105A; In the Cu-15Ni-8Sn alloy, add an amount of Ti element respectively and utilize the agglomerating method to prepare tin bronze alloys; Can effectively improve the Sn segregation and the wear resistance and the intensity that improve alloy of this alloy, this invention is that alloy uses through being machined to element after homogenizing processing-quenching-ageing treatment under as cast condition.Above several patents and method are not suitable for the production of large-scale strip material, and the mode of production of strip material employing at present, its ingot casting must be handled through homogenizing earlier be rolled production again.
Summary of the invention
To the problem that prior art exists, the object of the present invention is to provide a kind of tin bronze alloys preparation method who saves the energy, shortens technology, enhances productivity.
For realizing above-mentioned purpose, the preparation method of microalloying tin bronze alloys of the present invention comprises the steps:
1) alloy melting: alloy is carried out melting, insulation, degasification, slagging-off, refining in smelting furnace;
2) microalloying is handled: the melt after the refining is added fining agent;
3) alloy casting: the melt to handling through microalloying carries out ingot casting;
4) cold rolling cogging: to carrying out the cold rolling deformation tin bronze alloys that obtains through the alloy after the alloy casting.
Further, said fining agent is iron and or cobalt.
Further, said fining agent is an iron, and the degree that iron accounts for the raw material gross weight is 0.2% ~ 0.8%.
Further, said fining agent is a cobalt, and the degree that cobalt accounts for the raw material gross weight is 0.2% ~ 1.0%.
Further, said fining agent is iron and cobalt, and the degree that iron and cobalt account for the raw material gross weight is 0.1% ~ 0.6%.
Further, cold roller and deformed rate is 60-80% in the step 4).
Further, fining agent step 2) is 1240-1300 ℃ in temperature to be added down.
Further, step 1) and 2) is specially: electrolytic copper is put into smelting furnace, be heated to after melt melts fully; Add insulating covering agent and insulation; After degasification, removal of impurities, cover the calcination charcoal again, add Cu-P master alloy, the Sn of oven dry; After fully stirring, leaving standstill, add fining agent and carry out the microalloying processing.
The preparation method of microalloying tin bronze alloys of the present invention, the size of its ingot casting crystal grain is tiny, can reduce the segregation degree of Sn in the alloy; The brittle cracking that elimination produces in the operation of rolling makes alloy have good plasticity, and the ingot casting after particularly microalloying is handled can direct cold rolling system; Save the homogenizing treatment process among the existing preparation method, saved the energy, shortened technical process; Improve production efficiency, reduced production cost.
Description of drawings
Fig. 1 is the alloy metallograph after handling without microalloying;
Fig. 2 is 1 of the alloy metallograph of the present invention after microalloying is handled;
Fig. 3 is 2 of the alloy metallograph of the present invention behind microalloying;
Fig. 4 is 3 of the alloy metallograph of the present invention behind microalloying;
Fig. 5 is 4 of the alloy metallograph of the present invention after microalloying is handled;
Fig. 6 is 5 of the alloy metallograph of the present invention behind microalloying;
Fig. 7 is 6 of the alloy metallograph of the present invention behind microalloying;
Fig. 8 is 7 of the alloy metallograph of the present invention after microalloying is handled;
Fig. 9 is 8 of the alloy metallograph of the present invention behind microalloying;
Figure 10 is 9 of the alloy metallograph of the present invention behind microalloying.
Embodiment
Embodiment 1:
Microalloying tin bronze alloys preparation method of the present invention, concrete steps are:
1. alloy melting: adopt antivacuum induction furnace to carry out melting.Electrolytic copper is put into smelting furnace, be heated to after melt melts fully, add the insulating covering agent insulation, after degasification, removal of impurities, cover the calcination charcoal again, add the Cu-P master alloy and the Sn of oven dry, leave standstill after fully stirring;
2, microalloying is handled: the melt after the refining is added 0.2% cobalt fining agent, at high temperature 1240-1300 ℃, carry out microalloying and handle; Above-mentioned microalloying is handled the temperature that is adopted can be consistent with the smelting temperature in the step 1, the temperature that the microalloying treatment temp is adopted with reference to existing alloy melting;
3, alloy casting: the microalloying melt is carried out ingot casting, and pouring temperature is that 1150-1250 ℃ of temperature that adopts than above-mentioned microalloying processing is low slightly, under the effect of cooling conditions and fining agent cobalt, obtains tiny, uniform as-cast grain structure; The condition that cooling conditions adopts with reference to existing alloy casting;
4, cold rolling cogging: the alloy that will pass through the microalloying processing carries out the cold roller and deformed of 60-80%;
Obtain tin bronze alloys through above-mentioned steps, its 50 μ m metallograph is as shown in Figure 2.
Embodiment 2:
Microalloying tin bronze alloys preparation method of the present invention, concrete steps are:
1. alloy melting: adopt antivacuum induction furnace to carry out melting.Electrolytic copper is put into smelting furnace, be heated to after melt melts fully, add the insulating covering agent insulation, after degasification, removal of impurities, cover the calcination charcoal again, add the Cu-P master alloy and the Sn of oven dry, leave standstill after fully stirring;
2, microalloying is handled: the melt after the refining is added 0.6% cobalt fining agent, at high temperature 1240-1300 ℃, carry out microalloying and handle; Above-mentioned microalloying is handled the temperature that is adopted can be consistent with the smelting temperature in the step 1, the temperature that the microalloying treatment temp is adopted with reference to existing alloy melting;
3, alloy casting: the microalloying melt is carried out ingot casting, and pouring temperature is that 1150-1250 ℃ of temperature that adopts than above-mentioned microalloying processing is low slightly, under the effect of cooling conditions and fining agent cobalt, obtains tiny, uniform grain structure;
4, cold rolling cogging: the alloy that will pass through the microalloying processing carries out the cold roller and deformed of 60-80%;
Obtain tin bronze alloys through above-mentioned steps, its 50 μ m metallograph is as shown in Figure 3.
Embodiment 3:
Microalloying tin bronze alloys preparation method of the present invention, concrete steps are:
1. alloy melting: adopt antivacuum induction furnace to carry out melting.Electrolytic copper is put into smelting furnace, be heated to after melt melts fully, add the insulating covering agent insulation, after degasification, removal of impurities, cover the calcination charcoal again, add the Cu-P master alloy and the Sn of oven dry, leave standstill after fully stirring;
2, microalloying is handled: the melt after the refining is added 1.0% cobalt fining agent, at high temperature 1240-1300 ℃, carry out microalloying and handle; Above-mentioned microalloying is handled the temperature that is adopted can be consistent with the smelting temperature in the step 1, the temperature that the microalloying treatment temp is adopted with reference to existing alloy melting;
3, alloy casting: the microalloying melt is carried out ingot casting, and pouring temperature is that 1150-1250 ℃ of temperature that adopts than above-mentioned microalloying processing is low slightly, under the effect of cooling conditions and fining agent cobalt, obtains tiny, uniform grain structure;
4, cold rolling cogging: the alloy that will pass through the microalloying processing carries out the cold roller and deformed of 60-80%;
Obtain tin bronze alloys through above-mentioned steps, its 50 μ m metallograph is as shown in Figure 4.
Embodiment 4:
Microalloying tin bronze alloys preparation method of the present invention, concrete steps are:
1. alloy melting: adopt antivacuum induction furnace to carry out melting.Electrolytic copper is put into smelting furnace, be heated to after melt melts fully, add the insulating covering agent insulation, after degasification, removal of impurities, cover the calcination charcoal again, add the Cu-P master alloy and the Sn of oven dry, leave standstill after fully stirring;
2, microalloying is handled: the melt after the refining is added 0.2% iron fining agent, at high temperature 1240-1300 ℃, carry out microalloying and handle; Above-mentioned microalloying is handled the temperature that is adopted can be consistent with the smelting temperature in the step 1, the temperature that the microalloying treatment temp is adopted with reference to existing alloy melting;
3, alloy casting: the microalloying melt is carried out ingot casting, and pouring temperature is that 1150-1250 ℃ of temperature that adopts than above-mentioned microalloying processing is low slightly, under the effect of cooling conditions and fining agent iron, obtains tiny, uniform grain structure;
4, cold rolling cogging: the alloy that will pass through the microalloying processing carries out the cold roller and deformed of 60-80%;
Obtain tin bronze alloys through above-mentioned steps, its 50 μ m metallograph is as shown in Figure 5.
Embodiment 5:
Microalloying tin bronze alloys preparation method of the present invention, concrete steps are:
1. alloy melting: adopt antivacuum induction furnace to carry out melting.Electrolytic copper is put into smelting furnace, be heated to after melt melts fully, add the insulating covering agent insulation, after degasification, removal of impurities, cover the calcination charcoal again, add the Cu-P master alloy and the Sn of oven dry, leave standstill after fully stirring;
2, microalloying is handled: the melt after the refining is added 0.5% iron fining agent, at high temperature 1240-1300 ℃, carry out microalloying and handle; Above-mentioned microalloying is handled the temperature that is adopted can be consistent with the smelting temperature in the step 1, the temperature that the microalloying treatment temp is adopted with reference to existing alloy melting;
3, alloy casting: the microalloying melt is carried out ingot casting, and pouring temperature is that 1150-1250 ℃ of temperature that adopts than above-mentioned microalloying processing is low slightly, under the effect of cooling conditions and fining agent iron, obtains tiny, uniform grain structure;
4, cold rolling cogging: the alloy that will pass through the microalloying processing carries out the cold roller and deformed of 60-80%;
Obtain tin bronze alloys through above-mentioned steps, its 50 μ m metallograph is as shown in Figure 6.
Embodiment 6:
Microalloying tin bronze alloys preparation method of the present invention, concrete steps are:
1. alloy melting: adopt antivacuum induction furnace to carry out melting.Electrolytic copper is put into smelting furnace, be heated to after melt melts fully, add the insulating covering agent insulation, after degasification, removal of impurities, cover the calcination charcoal again, add the Cu-P master alloy and the Sn of oven dry, leave standstill after fully stirring;
2, microalloying is handled: the melt after the refining is added 0.8% iron fining agent, at high temperature 1240-1300 ℃, carry out microalloying and handle; Above-mentioned microalloying is handled the temperature that is adopted can be consistent with the smelting temperature in the step 1, the temperature that the microalloying treatment temp is adopted with reference to existing alloy melting;
3, alloy casting: the microalloying melt is carried out ingot casting, and pouring temperature is that 1150-1250 ℃ of temperature that adopts than above-mentioned microalloying processing is low slightly, under the effect of cooling conditions and fining agent iron, obtains tiny, uniform grain structure;
4, cold rolling cogging: the alloy that will pass through the microalloying processing carries out the cold roller and deformed of 60-80%;
Obtain tin bronze alloys through above-mentioned steps, its 50 μ m metallograph is as shown in Figure 7.
Embodiment 7:
Microalloying tin bronze alloys preparation method of the present invention, concrete steps are:
1. alloy melting: adopt antivacuum induction furnace to carry out melting.Electrolytic copper is put into smelting furnace, be heated to after melt melts fully, add the insulating covering agent insulation, after degasification, removal of impurities, cover the calcination charcoal again, add the Cu-P master alloy and the Sn of oven dry, leave standstill after fully stirring;
2, microalloying is handled: the melt after the refining is added 0.1% iron cobalt fining agent, at high temperature 1240-1300 ℃, carry out microalloying and handle; Above-mentioned microalloying is handled the temperature that is adopted can be consistent with the smelting temperature in the step 1, the temperature that the microalloying treatment temp is adopted with reference to existing alloy melting;
3, alloy casting: the microalloying melt is carried out ingot casting, and pouring temperature is that 1150-1250 ℃ of temperature that adopts than above-mentioned microalloying processing is low slightly, under the effect of cooling conditions and fining agent iron cobalt, obtains tiny, uniform grain structure;
4, cold rolling cogging: the alloy that will pass through the microalloying processing carries out the cold roller and deformed of 60-80%;
Obtain tin bronze alloys through above-mentioned steps, its 50 μ m metallograph is as shown in Figure 8.
Embodiment 8:
Microalloying tin bronze alloys preparation method of the present invention, concrete steps are:
1. alloy melting: adopt antivacuum induction furnace to carry out melting.Electrolytic copper is put into smelting furnace, be heated to after melt melts fully, add the insulating covering agent insulation, after degasification, removal of impurities, cover the calcination charcoal again, add the Cu-P master alloy and the Sn of oven dry, leave standstill after fully stirring;
2, microalloying is handled: the melt after the refining is added 0.3% iron cobalt fining agent, at high temperature 1240-1300 ℃, carry out microalloying and handle; Above-mentioned microalloying is handled the temperature that is adopted can be consistent with the smelting temperature in the step 1, the temperature that the microalloying treatment temp is adopted with reference to existing alloy melting;
3, alloy casting: the microalloying melt is carried out ingot casting, and pouring temperature is that 1150-1250 ℃ of temperature that adopts than above-mentioned microalloying processing is low slightly, under the effect of cooling conditions and fining agent iron cobalt, obtains tiny, uniform grain structure;
4, cold rolling cogging: the alloy that will pass through the microalloying processing carries out the cold roller and deformed of 60-80%;
Obtain tin bronze alloys through above-mentioned steps, its 50 μ m metallograph is as shown in Figure 9.
Embodiment 9:
Microalloying tin bronze alloys preparation method of the present invention, concrete steps are:
1. alloy melting: adopt antivacuum induction furnace to carry out melting.Electrolytic copper is put into smelting furnace, be heated to after melt melts fully, add the insulating covering agent insulation, after degasification, removal of impurities, cover the calcination charcoal again, add the Cu-P master alloy and the Sn of oven dry, leave standstill after fully stirring;
2, microalloying is handled: the melt after the refining is added 0.6% iron cobalt fining agent, at high temperature 1240-1300 ℃, carry out microalloying and handle; Above-mentioned microalloying is handled the temperature that is adopted can be consistent with the smelting temperature in the step 1, the temperature that the microalloying treatment temp is adopted with reference to existing alloy melting;
3, alloy casting: the microalloying melt is carried out ingot casting, and pouring temperature is that 1150-1250 ℃ of temperature that adopts than above-mentioned microalloying processing is low slightly, under the effect of cooling conditions and fining agent iron, obtains tiny, uniform grain structure;
4, cold rolling cogging: the alloy that will pass through the microalloying processing carries out the cold roller and deformed of 60-80%;
Obtain tin bronze alloys through above-mentioned steps, its 50 μ m metallograph is shown in figure 10.
There is Sn segregation (as shown in Figure 1) in existing tin bronze alloys preparation method in the tin bronze alloys ingot casting, make alloy embrittlement, causes alloy in the cold deformation process, to ftracture.And after alloy handles through microalloying between high temperature, short time,, can reduce the segregation degree of Sn in the alloy because alloy grain is tiny; The brittle cracking that elimination produces in the operation of rolling; Solve thick dendritic crystal in the tin bronze alloys as-cast structure, problem such as component segregation is serious the more important thing is and saved the homogenizing annealing operation in the course of processing; Saved the energy, shortened technology, improved production efficiency, for suitability for industrialized production is saved production cost.The tin bronze alloys that obtains simultaneously and isonomic other alloy phase ratios, intensity is higher, and plasticity is better, and meanwhile, elasticity also improves greatly, is applicable to the short flow process processing of tin bronze alloys.
Table 1 is method of the present invention and existing preparation method contrast, but shortens 1 of technology by the invention of table 1 knowledge capital, has efficient, energy-conservation, short flow process characteristics.
The contrast of table 1 alloy preparation technology step number
It is to be noted that the concrete working process parameter in each step can require suitably adjust according to field apparatus and product performance, in the various distortion that meet inventive concept all within protection scope of the present invention.
Claims (8)
1. the preparation method of a microalloying tin bronze alloys comprises the steps:
1) alloy melting: alloy is carried out melting, insulation, degasification, slagging-off, refining in smelting furnace;
2) microalloying is handled: the melt after the refining is added fining agent;
3) alloy casting: the melt to handling through microalloying carries out ingot casting;
4) cold rolling cogging: to carrying out the cold rolling deformation tin bronze alloys that obtains through the alloy after the alloy casting.
2. the preparation method of microalloying tin bronze alloys as claimed in claim 1 is characterized in that, said fining agent is iron and or cobalt.
3. the preparation method of microalloying tin bronze alloys as claimed in claim 2 is characterized in that, said fining agent is an iron, and the degree that iron accounts for the raw material gross weight is 0.2% ~ 0.8%.
4. the preparation method of microalloying tin bronze alloys as claimed in claim 2 is characterized in that, said fining agent is a cobalt, and the degree that cobalt accounts for the raw material gross weight is 0.2% ~ 1.0%.
5. the preparation method of microalloying tin bronze alloys as claimed in claim 2 is characterized in that, said fining agent is iron and cobalt, and the degree that iron and cobalt account for the raw material gross weight is 0.1% ~ 0.6%.
6. the preparation method of microalloying tin bronze alloys as claimed in claim 1 is characterized in that, cold roller and deformed rate is 60-80% in the step 4).
7. the preparation method of microalloying tin bronze alloys as claimed in claim 1 is characterized in that step 2) described in fining agent be 1240-1300 ℃ in temperature and add down.
8. the preparation method of microalloying tin bronze alloys as claimed in claim 1 is characterized in that, step 1) and 2) be specially: electrolytic copper is put into smelting furnace; Be heated to after melt melts fully, add insulating covering agent and insulation, after degasification, removal of impurities; Cover the calcination charcoal again; The Cu-P master alloy, the Sn that add oven dry after fully stirring, leaving standstill, add fining agent and carry out the microalloying processing.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102912184A (en) * | 2012-10-26 | 2013-02-06 | 江苏大学 | Strontium-titanium-boron composite micro-alloyed high-manganese aluminum bronze and method for manufacturing same |
| CN102912183A (en) * | 2012-10-26 | 2013-02-06 | 镇江金叶螺旋桨有限公司 | Strontium, titanium and boron composite microalloying manganese brass and preparation method of manganese brass |
| CN102925745A (en) * | 2012-10-26 | 2013-02-13 | 江苏大学 | Mg-Sr-Ti-B composite micro-alloyed manganese brass and preparation method thereof |
| CN102925742A (en) * | 2012-10-26 | 2013-02-13 | 镇江金叶螺旋桨有限公司 | Scandium, zirconium and strontium (Sc-Zr-Sr) compounded micro-alloyed high manganic aluminum bronze and preparation method thereof |
| CN103805795A (en) * | 2014-01-21 | 2014-05-21 | 苏州优诺电子材料科技有限公司 | Modifier for smelting Sn-Ag-Cu solder or Sn-Cu solder and using method of modifier |
| CN105886807A (en) * | 2016-06-01 | 2016-08-24 | 金川集团股份有限公司 | Preparation method for high-strength wear-resistant alloy Cu-15Ni-8Sn |
| CN105886832A (en) * | 2016-05-17 | 2016-08-24 | 安徽鑫科新材料股份有限公司 | Bronze bar and production method thereof |
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| CN102286714A (en) * | 2011-08-15 | 2011-12-21 | 江西理工大学 | Preparation method of copper-nickel-tin alloy |
| CN102418002A (en) * | 2011-09-25 | 2012-04-18 | 宁波市鄞州锡青铜带制品有限公司 | High-performance and low-tin bronze belt and production method thereof |
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| CN1314956A (en) * | 1998-06-23 | 2001-09-26 | 奥林公司 | Iron modified tin brass |
| CN102286714A (en) * | 2011-08-15 | 2011-12-21 | 江西理工大学 | Preparation method of copper-nickel-tin alloy |
| CN102418002A (en) * | 2011-09-25 | 2012-04-18 | 宁波市鄞州锡青铜带制品有限公司 | High-performance and low-tin bronze belt and production method thereof |
Cited By (11)
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| CN102912184A (en) * | 2012-10-26 | 2013-02-06 | 江苏大学 | Strontium-titanium-boron composite micro-alloyed high-manganese aluminum bronze and method for manufacturing same |
| CN102912183A (en) * | 2012-10-26 | 2013-02-06 | 镇江金叶螺旋桨有限公司 | Strontium, titanium and boron composite microalloying manganese brass and preparation method of manganese brass |
| CN102925745A (en) * | 2012-10-26 | 2013-02-13 | 江苏大学 | Mg-Sr-Ti-B composite micro-alloyed manganese brass and preparation method thereof |
| CN102925742A (en) * | 2012-10-26 | 2013-02-13 | 镇江金叶螺旋桨有限公司 | Scandium, zirconium and strontium (Sc-Zr-Sr) compounded micro-alloyed high manganic aluminum bronze and preparation method thereof |
| CN102912183B (en) * | 2012-10-26 | 2014-05-14 | 镇江金叶螺旋桨有限公司 | Strontium, titanium and boron composite microalloying manganese brass and preparation method of manganese brass |
| CN102912184B (en) * | 2012-10-26 | 2015-06-17 | 江苏大学 | Strontium-titanium-boron composite micro-alloyed high-manganese aluminum bronze and method for manufacturing same |
| CN103805795A (en) * | 2014-01-21 | 2014-05-21 | 苏州优诺电子材料科技有限公司 | Modifier for smelting Sn-Ag-Cu solder or Sn-Cu solder and using method of modifier |
| CN103805795B (en) * | 2014-01-21 | 2015-09-02 | 苏州优诺电子材料科技有限公司 | A kind of alterant for tin-silver-copper solder or Sn-Cu solder melting and using method |
| CN105886832A (en) * | 2016-05-17 | 2016-08-24 | 安徽鑫科新材料股份有限公司 | Bronze bar and production method thereof |
| CN105886832B (en) * | 2016-05-17 | 2017-11-14 | 安徽鑫科铜业有限公司 | A kind of bronze bar and its production method |
| CN105886807A (en) * | 2016-06-01 | 2016-08-24 | 金川集团股份有限公司 | Preparation method for high-strength wear-resistant alloy Cu-15Ni-8Sn |
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