CN105154715A - High-performance copper alloy material and preparation method thereof - Google Patents
High-performance copper alloy material and preparation method thereof Download PDFInfo
- Publication number
- CN105154715A CN105154715A CN201510556364.2A CN201510556364A CN105154715A CN 105154715 A CN105154715 A CN 105154715A CN 201510556364 A CN201510556364 A CN 201510556364A CN 105154715 A CN105154715 A CN 105154715A
- Authority
- CN
- China
- Prior art keywords
- alloy material
- copper alloy
- performance copper
- preparation
- continuous
- 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
Abstract
The invention discloses a high-performance copper alloy material and a preparation method thereof. The high-performance copper alloy material provided by the invention is composed of the following ingredients in percentage by mass: 1.0-3.2-% of Ni, 0.4-1.2% of Si, smaller than or equal to 0.2% of Ti, smaller than or equal to 0.2% of Pb, 0.5-1.0% of rate earth elements and the balance of Cu. According to the high-performance copper alloy material provided by the invention, since alloy elements namely Ni, Si, Ti and Pb and rate earth elements are added into Cu, and all elements in the alloy are reasonably proportioned, hardness, tensile strength, elongation and other mechanical properties of the copper alloy material are enhanced effectively. In the preparation method provided by the invention, copper rods with the size meeting process requirements are produced through refining, upward continuous casting under protective atmosphere and continuous extrusion. According to the method, a special melting and casting method is adopted to stabilize the quality of cast rods, processes are simplified through continuous extrusion and the production rate and the material utilization ratio are increased.
Description
Technical field
The invention belongs to non-ferrous metals processing field, be specifically related to a kind of high-performance copper alloy material and preparation method thereof.
Background technology
Corson alloy, owing to having high strength, excellent wear resistance, plasticity, proof stress relaxation property and hot cold-forming property, is all widely used in aviation, military project bearing, ship structural component, electric railway devices field.Along with growing continuously and fast of China's economy, particularly the fast development of the industry such as dynamo-electric manufacture, boats and ships, electric railway makes the steady-state growth year by year of Corson alloy materials demand amount.Corson alloy material produce enterprise domestic at present exists that production cost is high, the problem of complex process, quality instability mostly.Domestic many investigators conduct in-depth research for the performance of Corson alloy material and complete processing.
Patent CN101289716B discloses a kind of complete processing of nisiloy bronze alloy material.In the mass percent composition of this Cu alloy material, Ni is 1.6-3.4%, Si be 0.15-1.1%, Mn be≤1.0%, Fe is≤0.6%, inevitable impurity≤0.3%, and surplus is Cu; This Cu alloy material is processed into sheet material, band by corresponding rolling complete processing; Also bar, section bar is processed into by extrusion stretching complete processing; Wherein the complete processing of copper nisiloy bar comprises founding, heating, extruding, stretching, annealing, pickling, stretching, clean annealing, finishing, warehouse-in step.Hardness and the tensile strength of this copper alloy are lower, and overall mechanical property needs to be improved further; In the complete processing of copper nisiloy bar, the antivacuum foundry goods adopting non-vacuum melting to obtain easily is introduced oxidation impurities and makes the quality of foundry goods unstable; Stretching repeatedly and annealing operation make operation be interrupted and need repeatedly to heat thus energy consumption is strengthened; The extrusion process that forges conventional in actual production also often causes yield rate reduce and improve production cost.
CN101717877A discloses a kind of copper nisiloy bell metal and preparation method thereof.This copper alloy is made up of the component of following mass percent: Ni1.6-2.2%, Si0.4-0.8%, rare earth alloy 0.008%, Cu surplus; Above-mentioned copper alloy is by the step of batching, melting, casting, sawing, extruding, stretching, aligning, inspection, packaging warehouse-in.Although this Cu alloy material stress corrosion resistant ability strengthens, hardness value and tensile strength still need to be improved further.
Summary of the invention
The object of this invention is to provide a kind of high-performance copper alloy material, thus solve in existing copper nickel silicon alloy material, hardness and the low technical problem of tensile strength.
Second object of the present invention is to provide the preparation method of above-mentioned high-performance copper alloy material, thus solves the problem that casting quality is unstable, technical process is complicated, energy consumption is high existed in the complete processing of existing copper nisiloy bar.
In order to realize above object, the technical solution adopted in the present invention is:
A kind of high-performance copper alloy material, be made up of the component of following mass percent, Ni1.0 ~ 3.2%, Si0.4 ~ 1.2%, Ti≤0.2%, Pb≤0.02%, rare earth element 0.5 ~ 1.0%, surplus is Cu.
In high-performance copper alloy material provided by the invention, by adding alloying element Ni, Si, Ti, Pb and rare earth element in Cu, in alloy, each element is by rational proportion, effectively enhances the mechanical properties such as the hardness of Cu alloy material, tensile strength and unit elongation.In each alloying element, Ni can play the effect putting forward heavy alloyed corrosion stability and toughness, and addition controls to be advisable within the scope of 1.0 ~ 3.2wt%; Add Si and can improve alloy mechanical property, anti-corrosion, wear-resisting and welding property, and be conducive to hot cold conditions pressure machining characteristics, but the too high meeting of add-on makes plasticity decline, and is unfavorable for processing, too low, fall flat, its add-on controls in the scope of 0.4 ~ 1.2wt%; Ti has crystal grain thinning, improves the effect of high-temp plastic; In alloying element, the Pb of trace can be distributed on alloy substrate with the uniform particles of tiny dispersion, has good self-lubricating function, can improve wear resistance, and Pb can fill up interdendritic space simultaneously, has the effect improving density; Rare earth element can play the effect of crystal grain thinning, can put forward heavy alloyed density, its intensity and toughness is improved greatly, is conducive to the plastic making of alloy simultaneously.Above-mentioned alloying element can play synergy, and Cu alloy material of the present invention is had, and cost is low, hardness and the high feature of tensile strength.
Described rare earth element is preferably cerium and/or lanthanum.
High-performance copper alloy material of the present invention can be processed into sheet material, band, bar or section bar as required.Preferably, high-performance copper alloy material of the present invention is bar.
The preparation method of above-mentioned high-performance copper alloy material, comprises the following steps:
1) Cu, Ni, Si, Ti, Pb and rare earth element are heated to fusing, carry out refining with charcoal covering surfaces, obtain alloy molten solution;
2) by step 1) gained alloy molten solution carries out continuous up-casting under protective atmosphere and graphite flakes cover, and obtains continuous up-casting bar base;
3) by step 2) gained continuous up-casting bar base heating after carry out continuously extruded, cooling, to obtain final product.
In the preparation method of high-performance copper alloy material provided by the invention, step 1) be the fusion process of raw material, rare earth element in alloy composition can play refining effect in fusion process, gas in liquation and non-metallic inclusion can be removed by the refining of raw material, make alloying constituent more even; Step 2) be continuous up-casting process, continuous up-casting process is carried out under protective atmosphere and graphite flakes, can realize insulation and anti-oxidant, effectively avoid the problem of antivacuum foundry goods poor stability thus ensure that further casting quality is stable in fusion-casting process; Step 3) for continuous up-casting bar base by the continuously extruded process of continuous extrusion production line, continuous extruding technology is utilized not only to contribute to improving yield rate, and avoid in prior art the annealing that repeatedly stretches and cause complex procedures, the problem that energy consumption is high, be conducive to enterprise's simplification of flowsheet, realize continuous prodution, productivity and material use efficiency are further enhanced simultaneously.
Step 1) in, the temperature of described heating is 1150 ~ 1170 DEG C.
Step 1) in, described charcoal is the charcoal after drying.Adopt charcoal covering alloy molten surface to play and prevent oxygen uptake and steam, insulation and anti-oxidation effect.
Step 1) in, the time of described refining is 15 ~ 60min.
Step 2) in, in described continuous up-casting process, pulling speed is 500 ~ 700mm/min.
Step 3) in, the temperature of described heating is 200 ~ 400 DEG C.
Step 3) in, described continuously extruded speed is 1.5 ~ 2m/min.
Step 3) in, after described cooling, through cold rolling, vacuum aging, aligning, sawing, obtain high-performance copper nisiloy rod product.Described cold rolling for be rolled by y-type rolling mill, make final dimension bar, cold rolling reduction 40-80%.The condition of described vacuum aging is temperature 450 ~ 520 DEG C, soaking time 2 ~ 4h, vacuum tightness 0.02 ~ 0.05MPa.Adopt vacuum aging process can ensure that Surface of Rod Bar is not oxidized, thus improve the corrosion resistance nature of Surface of Rod Bar further.Namely scale rod product is become through aligning sawing.
The preparation method of high-performance copper alloy material provided by the invention, adopts refining and protective atmosphere continuous up-casting to make copper alloy bar base, adopts continuous extrusion production to go out to meet the bar of processing requirement.In each step of preparation method, each step closely cooperates, present method is had casting quality is stablized, flow process is short, serialization, energy-saving and environmental protection, low input, low cost feature, be very suitable for applying on a large scale.
Embodiment
Below in conjunction with specific implementation method, the invention will be further described.
Embodiment 1
The high-performance copper alloy material of the present embodiment, is made up of the component of following mass percent, Ni1.6%, Si0.8%, Ti0.1%, Pb0.02%, cerium 0.55%, and surplus is Cu.
The preparation method of the high-performance copper alloy material of the present embodiment, comprises the following steps:
1) electrolytic copper, pure nickel, pure silicon, pure titanium, pure lead and rare-earth element cerium are heated to 1170 DEG C, with the charcoal covering surfaces refining 20min of drying, obtain alloy molten solution;
2) by step 1) gained alloy molten solution is under argon atmosphere and graphite flakes cover, and carry out continuous up-casting, in this process, pulling speed is 500mm/min, obtains
continuous up-casting bar base;
3) by step 2) after gained continuous up-casting bar base is heated to 200 DEG C, continuously extruded with the speed of 1.5m/min by continuous extrusion production line, cooling, obtains
copper bar base;
4) by step 3) gained copper bar base is rolled into through y-type rolling mill
finished product excircle dimension copper rod, then through vacuum aging (vacuum tightness 0.02MPa, at 450 DEG C, is incubated 4h), aligning sawing, obtain the copper alloy bar of diameter 19mm, long 3m.
Embodiment 2
The high-performance copper alloy material of the present embodiment, is made up of the component of following mass percent, Ni1.0%, Si1.2%, Ti0.2%, Pb0.01%, cerium 1.0%, and surplus is Cu.
The preparation method of the high-performance copper alloy material of the present embodiment, comprises the following steps:
1) electrolytic copper, pure nickel, pure silicon, pure titanium, pure lead and rare-earth element cerium are heated to 1150 DEG C, with the charcoal covering surfaces refining 15min of drying, obtain alloy molten solution;
2) by step 1) gained alloy molten solution is under argon atmosphere and graphite flakes cover, and carry out continuous up-casting, in this process, pulling speed is 700mm/min, obtains
continuous up-casting bar base;
3) by step 2) after gained continuous up-casting bar base is heated to 300 DEG C, continuously extruded with the speed of 2m/min by continuous extrusion production line, cooling, obtains
copper bar base;
4) by step 3) gained copper bar base is rolled into through y-type rolling mill
finished product excircle dimension copper rod, then through vacuum aging (vacuum tightness 0.05MPa, at 520 DEG C, is incubated 2h), aligning sawing, obtain the copper alloy bar of diameter 19mm, long 3m.
Embodiment 3
The high-performance copper alloy material of the present embodiment, is made up of the component of following mass percent, Ni3.2%, Si0.4%, Ti0.05%, Pb0.02%, cerium 0.5%, and surplus is Cu.
The preparation method of the high-performance copper alloy material of the present embodiment, comprises the following steps:
1) electrolytic copper, pure nickel, pure silicon, pure titanium, pure lead and rare-earth elements of lanthanum are heated to 1160 DEG C, with the charcoal covering surfaces refining 60min of drying, obtain alloy molten solution;
2) by step 1) gained alloy molten solution is under argon atmosphere and graphite flakes cover, and carry out continuous up-casting, in this process, pulling speed is 600mm/min, obtains
continuous up-casting bar base;
3) by step 2) after gained continuous up-casting bar base is heated to 400 DEG C, continuously extruded with the speed of 2m/min by continuous extrusion production line, cooling, obtains
copper bar base;
4) by step 3) gained copper bar base is rolled into through y-type rolling mill
finished product excircle dimension copper rod, then through vacuum aging (vacuum tightness 0.03MPa, at 500 DEG C, is incubated 3h), aligning sawing, obtain the copper alloy bar of diameter 19mm, long 3m.
Embodiment 4
The high-performance copper alloy material of the present embodiment, is made up of the component of following mass percent, Ni1.6%, Si0.8%, Pb0.02%, cerium 0.55%, and surplus is Cu.
The preparation method of the high-performance copper alloy material of the present embodiment is substantially the same manner as Example 1, and concrete difference is, step 1) do not comprise pure titanium in raw material.
Embodiment 5
The high-performance copper alloy material of the present embodiment, is made up of the component of following mass percent, Ni1.6%, Si0.8%, Ti0.1%, cerium 0.55%, and surplus is Cu.
The preparation method of the high-performance copper alloy material of the present embodiment is substantially the same manner as Example 1, and concrete difference is, step 1) do not comprise pure lead in raw material.
Embodiment 6
The high-performance copper alloy material of the present embodiment, is made up of the component of following mass percent, Ni1.6%, Si0.8%, cerium 0.55%, and surplus is Cu.
The preparation method of the high-performance copper alloy material of the present embodiment is substantially the same manner as Example 1, and concrete difference is, step 1) do not comprise pure titanium and pure lead in raw material.
Test example
This test example is tested the hardness of the high-performance copper alloy material of embodiment 1 ~ 6, tensile strength and unit elongation, the results are shown in Table 1.
The performance test results of the high-performance copper alloy material of table 1 embodiment 1 ~ 6
| Sequence number | Brinell hardness, HB | Tensile strength, MPa | Unit elongation, % |
| Embodiment 1 | 221 | 648 | 8.8 |
| Embodiment 2 | 232 | 652 | 9 |
| Embodiment 3 | 228 | 662 | 9 |
| Embodiment 4 | 124 | 547 | 13.5 |
| Embodiment 5 | 126 | 512 | 14 |
| Embodiment 6 | 129 | 560 | 13.5 |
From the test-results of table 1, high-performance copper alloy material Brinell hardness of the present invention, tensile strength and unit elongation excellent performance, can meet multiple industries such as dynamo-electric manufacture, boats and ships, electric railway, power transmission to the requirement of Cu alloy material.
Claims (10)
1. a high-performance copper alloy material, is characterized in that, is made up of, Ni1.0 ~ 3.2%, Si0.4 ~ 1.2%, Ti≤0.2%, Pb≤0.02% component of following mass percent, rare earth element 0.5 ~ 1.0%, and surplus is Cu.
2. high-performance copper alloy material as claimed in claim 1, it is characterized in that, described rare earth element is cerium and/or lanthanum.
3. a preparation method for high-performance copper alloy material as claimed in claim 1, is characterized in that, comprises the following steps:
1) Cu, Ni, Si, Ti, Pb and rare earth element are heated to fusing, carry out refining with charcoal covering surfaces, obtain alloy molten solution;
2) by step 1) gained alloy molten solution carries out continuous up-casting under protective atmosphere and graphite flakes cover, and obtains continuous up-casting bar base;
3) by step 2) gained continuous up-casting bar base heating after carry out continuously extruded, cooling, to obtain final product.
4. the preparation method of high-performance copper alloy material as claimed in claim 3, is characterized in that, step 1) in, the temperature of described heating is 1150 ~ 1170 DEG C.
5. the preparation method of high-performance copper alloy material as claimed in claim 3, is characterized in that, step 1) in, the time of described refining is 15 ~ 60min.
6. the preparation method of high-performance copper alloy material as claimed in claim 3, is characterized in that, step 2) in, in described continuous up-casting process, pulling speed is 500 ~ 700mm/min.
7. the preparation method of high-performance copper alloy material as claimed in claim 3, is characterized in that, step 3) in, the temperature of described heating is 200 ~ 400 DEG C.
8. the preparation method of high-performance copper alloy material as claimed in claim 3, is characterized in that, step 3) in, described continuously extruded speed is 1.5 ~ 2m/min.
9. the preparation method of high-performance copper alloy material as claimed in claim 3, is characterized in that, step 3) in, after described cooling, through cold rolling, vacuum aging, aligning, sawing, obtain high-performance copper nisiloy rod product.
10. the preparation method of high-performance copper alloy material as claimed in claim 9, it is characterized in that, the condition of described vacuum aging is temperature 450 ~ 520 DEG C, soaking time 2 ~ 4h, vacuum tightness 0.02 ~ 0.05MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510556364.2A CN105154715A (en) | 2015-09-01 | 2015-09-01 | High-performance copper alloy material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510556364.2A CN105154715A (en) | 2015-09-01 | 2015-09-01 | High-performance copper alloy material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105154715A true CN105154715A (en) | 2015-12-16 |
Family
ID=54795754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510556364.2A Pending CN105154715A (en) | 2015-09-01 | 2015-09-01 | High-performance copper alloy material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105154715A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106077126A (en) * | 2016-08-05 | 2016-11-09 | 徐高磊 | A kind of production technology of copper magnesium alloy band |
| CN106881373A (en) * | 2017-03-22 | 2017-06-23 | 苏州中色华人铜业有限公司 | The shear processing technology of Precipitation enhanced type Cu alloy material |
| CN108277378A (en) * | 2018-04-04 | 2018-07-13 | 江西理工大学 | A kind of high-strength highly-conductive Cu-Cr-Ag alloy short flow processes |
| CN111074092A (en) * | 2019-12-26 | 2020-04-28 | 浙江杭机新型合金材料有限公司 | High-strength high-conductivity copper-nickel-silicon alloy material and preparation method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10110228A (en) * | 1996-08-14 | 1998-04-28 | Furukawa Electric Co Ltd:The | Copper alloy for electronic equipment and its production |
| CN1477220A (en) * | 2003-07-28 | 2004-02-25 | 洛阳铜加工集团有限责任公司 | ISIC leading wire frame copper tape and its production process |
| CN1930314A (en) * | 2004-03-12 | 2007-03-14 | 住友金属工业株式会社 | Copper alloy and process for producing the same |
| CN1986857A (en) * | 2005-12-22 | 2007-06-27 | 株式会社神户制钢所 | Copper alloy having excellent stress relaxation property |
| CN101871059A (en) * | 2009-04-27 | 2010-10-27 | 同和金属技术有限公司 | Copper alloy sheet and method for producing same |
| CN101969055A (en) * | 2010-08-13 | 2011-02-09 | 大连交通大学 | KFC copper alloy lead frame material produced by continuous extrusion rolling method |
| CN103878551A (en) * | 2014-03-27 | 2014-06-25 | 上海理工大学 | Method for producing high-strength copper nickel silica lead frame material |
| CN103966475A (en) * | 2014-05-15 | 2014-08-06 | 江西理工大学 | Copper-chromium-titanium alloy contact wire and preparation method thereof |
-
2015
- 2015-09-01 CN CN201510556364.2A patent/CN105154715A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10110228A (en) * | 1996-08-14 | 1998-04-28 | Furukawa Electric Co Ltd:The | Copper alloy for electronic equipment and its production |
| CN1477220A (en) * | 2003-07-28 | 2004-02-25 | 洛阳铜加工集团有限责任公司 | ISIC leading wire frame copper tape and its production process |
| CN1930314A (en) * | 2004-03-12 | 2007-03-14 | 住友金属工业株式会社 | Copper alloy and process for producing the same |
| CN1986857A (en) * | 2005-12-22 | 2007-06-27 | 株式会社神户制钢所 | Copper alloy having excellent stress relaxation property |
| CN101871059A (en) * | 2009-04-27 | 2010-10-27 | 同和金属技术有限公司 | Copper alloy sheet and method for producing same |
| CN101969055A (en) * | 2010-08-13 | 2011-02-09 | 大连交通大学 | KFC copper alloy lead frame material produced by continuous extrusion rolling method |
| CN103878551A (en) * | 2014-03-27 | 2014-06-25 | 上海理工大学 | Method for producing high-strength copper nickel silica lead frame material |
| CN103966475A (en) * | 2014-05-15 | 2014-08-06 | 江西理工大学 | Copper-chromium-titanium alloy contact wire and preparation method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106077126A (en) * | 2016-08-05 | 2016-11-09 | 徐高磊 | A kind of production technology of copper magnesium alloy band |
| CN106881373A (en) * | 2017-03-22 | 2017-06-23 | 苏州中色华人铜业有限公司 | The shear processing technology of Precipitation enhanced type Cu alloy material |
| CN108277378A (en) * | 2018-04-04 | 2018-07-13 | 江西理工大学 | A kind of high-strength highly-conductive Cu-Cr-Ag alloy short flow processes |
| CN108277378B (en) * | 2018-04-04 | 2019-03-29 | 江西理工大学 | A kind of high-strength highly-conductive Cu-Cr-Ag alloy short flow process |
| CN111074092A (en) * | 2019-12-26 | 2020-04-28 | 浙江杭机新型合金材料有限公司 | High-strength high-conductivity copper-nickel-silicon alloy material and preparation method thereof |
| CN111074092B (en) * | 2019-12-26 | 2021-08-17 | 浙江杭机新型合金材料有限公司 | High-strength high-conductivity copper-nickel-silicon alloy material and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101654764B (en) | Iron-nickel based highly elastic alloy, capillary pipe thereof and method for manufacturing capillary pipe | |
| CN103725972A (en) | Low-carbon multi-element high-resistance electrothermal alloy and preparation method thereof | |
| CN109266901B (en) | Preparation method of Cu15Ni8Sn high-strength wear-resistant alloy rod/wire | |
| CN111549253B (en) | Rare earth copper-iron alloy, preparation method and application | |
| CN104073685B (en) | A kind of high-strength creep resistant dilute copper alloy material and application thereof | |
| CN105154715A (en) | High-performance copper alloy material and preparation method thereof | |
| CN110042272B (en) | High-conductivity high-strength CuFeNb-series elastic copper alloy and preparation method thereof | |
| CN101797679B (en) | Method for manufacturing high-purity metal wire | |
| CN102899525A (en) | High strength and toughness wear-resisting complex brass and production method thereof | |
| CN104164589A (en) | High-strength wear-resistant copper alloy and preparation method thereof | |
| CN111996397A (en) | Method for regulating hydrogen embrittlement resistance and corrosion resistance of CoNiV medium-entropy alloy | |
| CN109295346B (en) | High-conductivity soft aluminum alloy and preparation method and application thereof | |
| CN104233065A (en) | Silicon carbide-enhanced iron/aluminum composite material and preparation method thereof | |
| WO2016065498A1 (en) | High-strength deformable zinc-based alloy material | |
| CN104947002A (en) | Cobalt-copper alloy | |
| CN105177395A (en) | Manufacturing technique of nickel-copper alloy | |
| CN113106286B (en) | High-conductivity beryllium copper alloy rod for 5G communication and preparation process thereof | |
| CN115652132B (en) | Copper alloy material and application and preparation method thereof | |
| CN108300895B (en) | Method for manufacturing nonmagnetic cube texture Cu-Ni-Cr alloy baseband for high-temperature superconducting coated conductor | |
| CN110863124A (en) | High-strength high-plasticity medium-entropy alloy and preparation method thereof | |
| CN113652573B (en) | High-strength, high-conductivity and high-heat-resistance Cu-Ag-Hf alloy material and preparation method thereof | |
| CN110284025B (en) | Aluminum bronze material and preparation method thereof | |
| CN110964942B (en) | Preparation process of high-strength wear-resistant copper alloy pipe | |
| CN114075633A (en) | High-thermal-conductivity corrosion-resistant CuFe alloy, plate strip and preparation method thereof | |
| CN104087768A (en) | Method for improving performance of nickel-chromium-iron electrothermal alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151216 |
|
| RJ01 | Rejection of invention patent application after publication |