CN107723499A - The tellurium silver chromium-bronze material of lead-free free-cutting high-strength high-plasticity high conductivity - Google Patents
The tellurium silver chromium-bronze material of lead-free free-cutting high-strength high-plasticity high conductivity Download PDFInfo
- Publication number
- CN107723499A CN107723499A CN201710849819.9A CN201710849819A CN107723499A CN 107723499 A CN107723499 A CN 107723499A CN 201710849819 A CN201710849819 A CN 201710849819A CN 107723499 A CN107723499 A CN 107723499A
- Authority
- CN
- China
- Prior art keywords
- copper
- free
- chromium
- tellurium
- cutting
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Conductive Materials (AREA)
Abstract
The present invention discloses a kind of tellurium silver chromium-bronze material of lead-free free-cutting high-strength high-plasticity high conductivity, it is characterised in that：The percentage by weight of the material forms：Ag 0.02~0.2%, Te 0.08~0.5%, Cr 0.1~1.5%, P 0.002~0.015%, Pb ＜ 0.01%, surplus are copper and inevitable impurity.The present invention is by adjusting the optimal addition of the copper in alloy material, tellurium, chromium, copper-phosphorus alloy to obtain accumulative effect, it is ensured that alloy material has excellent cutting ability and high conductance；Compared with existing chromium-zirconium-copper, tellurium copper, red copper, tellurium silver chromium-bronze material has high intensity, high-ductility, high conductivity, and high in machining efficiency, while has high oxidation resistance and high temperature softening resistant performance.
Description
Technical field：
The present invention relates to a kind of lead-free free-cutting high intensity (419-455MPa) high-ductility (5-12%) high conductivity
The tellurium silver chromium-bronze material of (IACS% -93~97%).
Background technology：
In cutting field, the cutting of plasma cut, particularly fine plasma is answered in numerous industrial circles
With still, with the development of the laser technologies such as optical fiber, laser cutting machine also begins to be favored by some users in recent years.Deng
Ion cutting machine is a kind of thermal cutting equipment, and main operation principle is that compressed air is main body, with the plasma of high temperature and high speed
Arc is thermal source, by cut metal local melting and simultaneously blows away molten metal with high velocity air, forms narrow cut
Seam.CUT can be with the various metal materials such as cutting stainless steel, iron, aluminium, copper, and cutting speed is fast, and joint-cutting is narrow, cuts
Mouth is smooth.CUT is generally used in machinery, the construction of metal structure, installation and maintenance.
Laser cutting machine is the surface that material is scanned using the highdensity laser beam of high power, in a short period of time
Thousands of or even up to ten thousand degrees Celsius can be heated the material to, material melts or vaporization can be made, then will be melted with gases at high pressure
Or other materials are blown away from joint-cutting.Laser cutting instead of traditional mechanical blades with invisible light beam, be cut by laser
Speed is fast, otch is smooth, does not need post-production usually, and cutting is influenced by heat smaller, and sheet deformation is small.
Parts on laser cutting machine not only require higher electric conductivity, also require oxidation resistance and resist soft
Change ability, there is high intensity, but also to have high processing efficiency, cutting ability will get well, and the requirement to material is unusual
It is high.
In addition in high-end automobile crane machine bolt industry, the C11000 red coppers originally used always, but require now more
Strictly, not only require and the close electric conductivity of C11000 red coppers or higher than it, taller plasticity, high intensity, and
There is the requirement of cutting ability, meet processing efficiency.
In summary the requirement of two kinds of special industries, material had both needed high conductance, high intensity, high-ductility, also
There are good machinability and excellent oxidation resistance and high temperature softening resistant performance.At present, the material used both at home and abroad
Material is mainly the materials such as chromium-zirconium-copper, tellurium copper, red copper.Chromium-zirconium-copper is usually used in cutting industry, and electric conductivity is general, though have high strong
Degree, but poor processability, and manufacturer's technological process is complicated, and vacuum melting furnace, vacuum annealing furnace, high temperature are needed in equipment
The equipment such as glowing furnace, fund input are very huge.The excellent cutting performance of tellurium copper, electric conductivity is general, and plasticity is also general, and material
Material has fragility, has certain cracking risk.Although red copper electric conductivity is excellent, cutting ability extreme difference, and material against oxidative
Ability and high temperature softening resistant performance are poor.
The content of the invention：
The present invention is directed to the respective shortcoming of the above-mentioned chromium-zirconium-copper of prior art, tellurium copper and red copper, there is provided a kind of both to have had well
Conductance and good machinability, and resist with high intensity, high-ductility and good oxidation resistance, high temperature
The tellurium silver chromium-bronze material of the lead-free free-cutting high-strength high-plasticity high conductivity of softening performance.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：A kind of lead-free free-cutting high-strength high-plasticity
Property high conductivity tellurium silver chromium-bronze material, the material percentage by weight composition is：Ag 0.02~0.2%, Te0.08~
0.5%th, Cr 0.1~1.5%, P 0.002~0.015%, Pb ＜ 0.01%, surplus are copper and inevitable impurity.
Inevitable impurity of the present invention, impurity of its total amount no more than 0.04% is (i.e. in lead-free free-cutting height
Content in the tellurium silver chromium-bronze material of intensity high-ductility high conductivity).
Cu+Ag+Te+Cr ＞ 99.90% of the present invention.
Its percentage by weight of the tellurium silver chromium-bronze material of the present invention forms preferred scheme：Ag 0.03~0.1%, Te0.1
~0.40%, Cr 0.2~1.0%, P 0.002~0.012%, Pb ＜ 0.01%, surplus are copper and inevitable impurity.
The preferred percentage by weight of tellurium silver chromium-bronze material of the present invention forms：Ag 0.04~0.08%, Te0.15
~0.30%, Cr 0.30~0.80%, P 0.004~0.01%, Pb ＜ 0.01%, surplus are copper and inevitable impurity.
Cr of the present invention is added with part copper in the form of chromium-copper intermediate alloy as raw material, is closed among described chromium-copper
Cr content is 10% in gold, remaining is 90% copper.
Phosphorus of the present invention is added in the form of phosphor bronze alloy as raw material, and described phosphor bronze alloy P's contains
Measure as 15%, remaining is 85% copper.
The reason for metallic element species and addition are limited in tellurium silver chromium-bronze of the present invention is：
Silver：Added to improve softening power, conductance and material plasticity.Cu-Ag can form eutectic phasor, altogether
During 780 DEG C of brilliant temperature, silver-colored solubility is 7.9%, but solubility during room temperature only 0.1% or so.Silver and the member that Cu can be dissolved
It is plain different, when silver content is few, the conductance of copper and will not declining substantially for thermal conductivity, and significantly improve the recrystallization temperature of copper with
Creep strength, and consider Cost Problems.So most preferably Ag contents are between 0.04~0.08%.
Tellurium：Added to improve cutting ability and arc extinction performance, because tellurium is with disperse independence phase Cu2Te is present in copper
In make chip easily broken, improve the machinability and arc extinction performance of copper, but tellurium copper can only use in machining state, it is impossible to anneal
Processing, because Cu during annealing (600 DEG C or so)2Te meeting intercrystalline precipitations, make material become fragile, tellurium dislikes the solderability of copper in addition
Change, it is not easy to using oxy-acetylene and electric resistance welding.Te contents are more than 0.3%, and the welding performance of material declines and increases material
Cost.Te contents are less than 0.05%, and the cutting ability improvement of material is not obvious enough.So most preferably Te contents 0.15~
Between 0.30%.
Chromiumcopper：Added to improve the strength of materials, due at 1072 DEG C of eutectic temperature, chromium in copper most
Big solid solubility is 0.65%.The addition of chromium, the recrystallization temperature and heat resistance of material are on the one hand significantly improved, it is on the other hand micro
Chromium on the electric conductivity of material substantially without influence.Cr contents are more than 0.8%, and the electric conductivity of material has declined and because fusing point is asked
Topic, Cr are easily aoxidized in melting.Cr contents are less than 0.3%, and the improved strength of material is not obvious enough.So most preferably Te contains
Amount is between 0.30~0.80%.
Copper-phosphorus alloy：Phosphorus has desirable influence to the mechanical property of copper with welding performance, and the addition of trace amounts of phosphorus can carry
The mobility of high-copper and there is deoxidation.Phosphorus content is less than 0.004%, and material flowability and deoxidation effect are failed to understand
It is aobvious, more than 0.01% pair of material performance without further improvement, most preferred range is 0.004~0.01%.
Copper：The copper content of alloy material is higher, and conductance is higher, otherwise conductance declines.The raw material that alloy material uses
Cathode copper copper content cannot be below 99.95%, otherwise the too high electric conductivity that can influence material of the impurity content in raw material cathode copper
Energy.
The advantages of the present invention：
1. the present invention is by adjusting the optimal addition of the copper in alloy material, tellurium, chromium, copper-phosphorus alloy to be accumulated
Effect, it is ensured that alloy material has excellent cutting ability and high conductance；Compared with existing chromium-zirconium-copper, tellurium copper, red copper,
Tellurium silver chromium-bronze material has high intensity (425-460MPa), high-ductility (5-12%), high conductivity, and high in machining efficiency, together
When there is high oxidation resistance and high temperature softening resistant performance.
2. silver, tellurium and chromium in the tellurium silver chromium-copper bronze material of lead-free free-cutting high-strength high-plasticity high conductivity of the present invention
Solubility very little in In Crystal Solid Copper, conductance and thermal conductivity on copper influence very little, can improve plasticity, the machinable of copper respectively
Performance and intensity；Although silver element price is high, micro silver is only added in this material, has to material plasticity and substantially carries
Height, and can be ignored substantially by the raising of processing efficiency and lumber recovery, these costs, and material is applied to high-end production
Product, therefore tellurium silver chromium-bronze material is more suitably widely used in plasma cut, laser cutting than chromium-zirconium-copper, tellurium copper and red copper
Etc. the prioritizing selection material of the industries such as the parts material in industry, high-end automobile crane machine bolt.
3. in the material of the present invention, wherein Cu+Ag+Te+Cr ＞ 99.90%；Host element is added up more than 99.9%, explanation
The purity of raw material will get well, and so just can guarantee that the performance of material is qualified；And the specific ratio of four kinds of components and with it is micro
P elements be combined with each other, matched；The alloy that can ensure to prepare has good conductance and good machinability
Can, and with the advantage such as high intensity, high-ductility and good oxidation resistance, high temperature softening resistant performance.
Brief description of the drawings
The depth of cut 0.5mm of the specimen material of Fig. 1 embodiments 5.
The depth of cut 1.0mm of the specimen material of Fig. 2 embodiments 5.
The depth of cut 0.5mm of the specimen material of Fig. 3 embodiments 6.
The depth of cut 1.0mm of the specimen material of Fig. 4 embodiments 6.
The depth of cut 0.5mm of the specimen material of Fig. 5 embodiments 7.
The depth of cut 1.0mm of the specimen material of Fig. 6 embodiments 7.
The depth of cut 0.5mm of the specimen material of Fig. 7 embodiments 8.
The depth of cut 1.0mm of the specimen material of Fig. 8 embodiments 8.
Embodiment：
The present invention is described in further detail with reference to embodiment, but the present invention is not limited solely to embodiment：
Alloy material of embodiment of the present invention sample preparation methods are industry conventional method, and substantially flow is：Dispensing → power frequency
Electric induction furnace melting (Alloying Treatment, charcoal covering protection) → D.C.casting φ 163mm ingot casting (1150 DEG C of smelting temperature~
1300 DEG C, degasification during cast) → 1250 tons of indirect extrusion machines, 830~860 DEG C of extruding → 18 → φ of φ 28 → φ, 23 → φ 15, into
Product are using the alignment polishing of two roller straighteners, and the wherein Te in blending process is pure tellurium material, and Ag is fine silver material.Other dispensing
During chromium, phosphorus be Cu-Cr, Cu-P intermediate alloy form add, the final content of each component each falls within partition content
Scope.
Comparative sample tellurium copper, red copper are also process using same process conditions, and chromium-zirconium-copper uses vacuum electric furnace melting,
Road is using solid solution and Ageing Treatment afterwards.
Each embodiment of tellurium silver chromium-bronze material and comparative example of lead-free free-cutting high-strength high-plasticity high conductivity of the present invention
The specific component content list (table 1) of chromium-zirconium-copper, tellurium copper and red copper.
Each embodiment of tellurium silver chromium-bronze material and comparative example of lead-free free-cutting high-strength high-plasticity high conductivity of the present invention
The properties of chromium-zirconium-copper, tellurium copper and red copper compare list (table 2).
Electrical conductivity test basis in table 2 are GB/T 3048.2-2007《Electric wire point method for testing performance the 2nd
Point：Metal material resistivity test》.
Mechanical properties test foundation in table 2 is GB/T 228.1-2010.
Cutting ability in table 2 evaluates usual way：Fixed Cutting Process parameter, measure cutting force and Cutting free lead
Brass HPb63-3 compares, and obtains relative stock removal rate.But often according to cutting shape size, the smooth journey of chip removal in actual production
Degree, tool wear degree judge " good " or " poor " of the machinability of material.We are using Chip Morphology test method
Carry out.The speed of mainshaft is 1000rpm/min, amount of feeding 0.16mm/rer.The depth of cut is respectively 0.5mm and 1.0mm.Wherein
" excellent " expression excellent cutting performance, " good " to represent good, " poor " expression cutting ability is poor.
Softening temperature service check foundation in table 2 is GB/T 33370-2016.
The embodiment of the present invention of table 1 and comparative example red copper, tellurium copper and chrome zirconium copper alloy component (wt%)
Add Cr elements in embodiment 1, embodiment 1,2,3 respectively illustrates that Cr contents are low to influence intensity, and Te contains
Measure it is low can influence cutting ability, Ag contents are low to influence plasticity, and it is too high that embodiment 4 illustrates that Ag and Cr is added, not big to performance
Raising, add cost on the contrary, embodiment 5 is optimal components scope.
The embodiment alloy of table 2 is compared with comparative example alloy property
Contrast, compare from Chip Morphology, tellurium silver chromium-bronze material from the Chip Morphology of the embodiment of accompanying drawing 1~8 and comparative example
Cutting ability it is well more many than red copper, chromium-zirconium-copper, it is suitable with tellurium copper.
Above-mentioned various result of the tests show, the tellurium silver chromium-bronze of lead-free free-cutting high-strength high-plasticity high conductivity of the present invention
Material is compared with tellurium copper：Electrical conductivity, tensile strength, plasticity are better than tellurium copper, oxidation resistance and softening resistant performance also superior to tellurium copper,
Cutting ability is suitable.Compared with red copper：Tensile strength, plasticity, cutting ability are better than red copper, oxidation resistance and anti-softening ability
Also superior to red copper, conductance is suitable, even better.Compared with chromium-zirconium-copper：Electrical conductivity, plasticity, cutting ability are better than chromium-zirconium-copper, resist
Tensile strength is suitable with chromium-zirconium-copper.So tellurium silver chromium-bronze material ratio of lead-free free-cutting high-strength high-plasticity high conductivity of the present invention
Chromium-zirconium-copper (C18150), tellurium copper (C14500), the more preferable material of red copper (C11000) combination property, suitable for high-end parts
The industry parts such as industry, such as plasma cut, the parts material in laser cutting industry, high-end automobile crane machine bolt
Etc..
Claims (9)
- A kind of 1. tellurium silver chromium-bronze material of lead-free free-cutting high-strength high-plasticity high conductivity, it is characterised in that：The material Percentage by weight forms：Ag 0.02~0.2%, Te 0.08~0.5%, Cr 0.1~1.5%, P 0.002~ 0.015%th, Pb ＜ 0.01%, surplus are copper and inevitable impurity.
- 2. the tellurium silver chromium-bronze material of lead-free free-cutting high-strength high-plasticity high conductivity according to claim 1, it is special Sign is：Described Cu+Ag+Te+Cr ＞ 99.90%.
- 3. the tellurium silver chromium-bronze material of lead-free free-cutting high-strength high-plasticity high conductivity according to claim 1, it is special Sign is：Described inevitable total impurities are not more than 0.04% impurity.
- 4. the tellurium silver chromium of the lead-free free-cutting high-strength high-plasticity high conductivity according to claim 1-3 any claims Bronze material, it is characterised in that：The percentage by weight of the material forms：Ag 0.03~0.1%, Te 0.1~0.40%, Cr 0.2~1.0%, P 0.002~0.012%, Pb ＜ 0.01%, surplus are copper and inevitable impurity.
- 5. the tellurium silver chromium-bronze material of lead-free free-cutting high-strength high-plasticity high conductivity according to claim 4, it is special Sign is：The percentage by weight of the material forms：Ag 0.04~0.08%, Te 0.15~0.30%, Cr 0.30~ 0.80%th, P 0.004~0.01%, Pb ＜ 0.01%, surplus are copper and inevitable impurity.
- 6. the tellurium silver chromium-bronze material of lead-free free-cutting high-strength high-plasticity high conductivity according to claim 5, it is special Sign is：Described Cr is added with part copper in the form of chromium-copper intermediate alloy as raw material.
- 7. the tellurium silver chromium-bronze material of lead-free free-cutting high-strength high-plasticity high conductivity according to claim 6, it is special Sign is：The content of chromium is 10% in described chromium-copper intermediate alloy.
- 8. the tellurium silver chromium-bronze material of lead-free free-cutting high-strength high-plasticity high conductivity according to claim 5, it is special Sign is：Described phosphorus is added in the form of phosphor bronze alloy as raw material.
- 9. the tellurium silver chromium-bronze material of lead-free free-cutting high-strength high-plasticity high conductivity according to claim 8, it is special Sign is：The content of phosphorus is 15% in described phosphor bronze alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710849819.9A CN107723499A (en) | 2017-09-20 | 2017-09-20 | The tellurium silver chromium-bronze material of lead-free free-cutting high-strength high-plasticity high conductivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710849819.9A CN107723499A (en) | 2017-09-20 | 2017-09-20 | The tellurium silver chromium-bronze material of lead-free free-cutting high-strength high-plasticity high conductivity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107723499A true CN107723499A (en) | 2018-02-23 |
Family
ID=61206650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710849819.9A Pending CN107723499A (en) | 2017-09-20 | 2017-09-20 | The tellurium silver chromium-bronze material of lead-free free-cutting high-strength high-plasticity high conductivity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107723499A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110184493A (en) * | 2019-05-21 | 2019-08-30 | 上海锦町实业有限公司 | A kind of high temperature resistant contact |
| CN112680623A (en) * | 2021-01-08 | 2021-04-20 | 北京中超伟业信息安全技术股份有限公司 | Low-radiation high-strength high-conductivity copper alloy wire and preparation method and application thereof |
| CN113564407A (en) * | 2021-07-27 | 2021-10-29 | 中国兵器科学研究院宁波分院 | Heat-resistant tellurium-copper alloy material and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6086231A (en) * | 1983-10-14 | 1985-05-15 | Nippon Mining Co Ltd | High-strength conductive copper alloy |
| CN101743333A (en) * | 2007-08-07 | 2010-06-16 | 株式会社神户制钢所 | copper alloy sheet |
| CN105463219A (en) * | 2015-11-23 | 2016-04-06 | 晋源电气集团股份有限公司 | High-performance oxygen-free copper rod and manufacturing method thereof |
| CN105637106A (en) * | 2013-09-20 | 2016-06-01 | Ｊｘ金属株式会社 | Copper alloy foil |
-
2017
- 2017-09-20 CN CN201710849819.9A patent/CN107723499A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6086231A (en) * | 1983-10-14 | 1985-05-15 | Nippon Mining Co Ltd | High-strength conductive copper alloy |
| CN101743333A (en) * | 2007-08-07 | 2010-06-16 | 株式会社神户制钢所 | copper alloy sheet |
| CN105637106A (en) * | 2013-09-20 | 2016-06-01 | Ｊｘ金属株式会社 | Copper alloy foil |
| CN105463219A (en) * | 2015-11-23 | 2016-04-06 | 晋源电气集团股份有限公司 | High-performance oxygen-free copper rod and manufacturing method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 美国金属学会主编，包芳涵译: "《金属手册 第九版 第六卷 焊接、硬钎焊、软钎焊》", 31 July 1994, 机械工业出版社 * |
| 赵祖德等: "《铜及铜合金材料手册》", 31 December 1993, 科学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110184493A (en) * | 2019-05-21 | 2019-08-30 | 上海锦町实业有限公司 | A kind of high temperature resistant contact |
| CN112680623A (en) * | 2021-01-08 | 2021-04-20 | 北京中超伟业信息安全技术股份有限公司 | Low-radiation high-strength high-conductivity copper alloy wire and preparation method and application thereof |
| CN113564407A (en) * | 2021-07-27 | 2021-10-29 | 中国兵器科学研究院宁波分院 | Heat-resistant tellurium-copper alloy material and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Davis | Copper and copper alloys | |
| US6699337B2 (en) | Copper-base alloys having improved punching properties on press and a process for producing them | |
| KR101127000B1 (en) | Copper alloy for electronic material and method for the same | |
| WO2018045695A1 (en) | Softening resistant copper alloy, preparation method, and application thereof | |
| CN104073686B (en) | A kind of deformation dilute copper alloy material riveted and application thereof | |
| CN107723499A (en) | The tellurium silver chromium-bronze material of lead-free free-cutting high-strength high-plasticity high conductivity | |
| CN104263995B (en) | A kind of kamash alloy line | |
| CN106399748A (en) | Novel copper-nickel-silicon system alloy material for lead frame and preparation method of novel copper-nickel-silicon system alloy material | |
| JPH0754079A (en) | Copper alloy commonly having conductivity and strength | |
| CN113088750B (en) | Copper-iron alloy wire and preparation method thereof | |
| CN111235427A (en) | Free-cutting brass alloy and preparation method and application thereof | |
| US4473621A (en) | Cadmium free gold alloys | |
| JPS5816044A (en) | Copper alloy | |
| JP2014194078A (en) | Aluminum alloy conductor and electric wire using the same | |
| CN100478473C (en) | High temperature, solid solution, strengthened, heat-resistant titanium alloy containing rare earth | |
| JP4459067B2 (en) | High strength and high conductivity copper alloy | |
| CN101439429B (en) | Electrode wire for slow-travel wire spark erosion fabrication and preparation method thereof | |
| JP2004183102A (en) | Steel for machine structure, hot forming method for component consisting of the steel, and component obtained thereby | |
| JPS6158541B2 (en) | ||
| CN101435035A (en) | High-strength wear resistant brass | |
| US10364482B2 (en) | Copper-zinc alloy, band material composed thereof, process for producing a semifinished part composed of a copper-zinc alloy and sliding element composed of a copper-zinc alloy | |
| CN112458332B (en) | Titanium bronze alloy bar and preparation method and application thereof | |
| CN103589904B (en) | A kind of high-strength wear-resistant copper alloy and pipe-making method thereof | |
| CN113215439A (en) | High-strength copper alloy plate and production process thereof | |
| CN103384727A (en) | High-strength copper alloy forging |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180223 |