CN104647827A - Copper alloy-steel bimetallic composite material and preparation method and application thereof - Google Patents
Copper alloy-steel bimetallic composite material and preparation method and application thereof Download PDFInfo
- Publication number
- CN104647827A CN104647827A CN201510107572.4A CN201510107572A CN104647827A CN 104647827 A CN104647827 A CN 104647827A CN 201510107572 A CN201510107572 A CN 201510107572A CN 104647827 A CN104647827 A CN 104647827A
- Authority
- CN
- China
- Prior art keywords
- copper alloy
- copper
- mcmb
- bimetal
- steel composite
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/02—2 layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/536—Hardness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/554—Wear resistance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2605/00—Vehicles
- B32B2605/08—Cars
Abstract
The invention discloses a copper alloy-steel bimetallic composite material and a preparation method and application thereof. The material is formed by compounding a carbon steel-based layer of which the carbon content is less than or equal to 0.25wt% and a copper alloy layer added with intermediate phase carbon microspheres, wherein the copper alloy comprises the following components: 3.0-13.0wt% of tin, 1.0-5.0wt% of nickel, 81.5-99.5wt% of copper, and not greater than 0.5wt% of the content sum of other impurities. The copper alloy-steel bimetallic composite material is prepared by adopting a powder metallurgic method, and the material has the advantages of high strength, hardness and mechanical bearing capacity and excellent wear resistance, is environment-friendly, low in cost, simple in preparation process and easy in large-scale production, can serve as a sliding bearing material and has industrial application values.
Description
Technical field
The present invention relates to one Albatra metal--bimetal copper-steel composite and its preparation method and application, belongs to double metallic composite material technical field.
Background technology
Sliding bearing is very important friction consumable accessory in automobile (particularly engine), forms important friction pair with some axial workpiece on engine crankshaft, piston pin, camshaft and automobile chassis.The performance of material for sliding bearing affects to a certain extent or decides the life-span of automobile and engine, reliability and some Main Economic technical indicator.Therefore, along with improving constantly of automobile and engine performance, the performance requirement of material for sliding bearing is also improved constantly.
Current heavy-duty engine sliding bearing generally uses Allen's metal-bimetal copper-steel composite, because Allen's metal-bimetal copper-steel composite has good antifriction quality, wearability, seizure resistance, bearing capacity and fatigue resistance etc., lead is the lubricant component in material for sliding bearing, for improve heavy duty, middling speed and high speed engine material for sliding bearing anti-seizing property most important.But along with human society is more and more paid attention to environmental protection, require that restriction uses plumbous cry also more and more higher, therefore, the unleaded study hotspot becoming material science in recent years of material for sliding bearing.
In recent years, some domestic and international material science workers are as plumbous in graphite or short carbon fiber carry out alternative lubricant component by introducing kollag in material for sliding bearing is unleaded.Because the hardness of graphite is lower, add graphite in copper alloy and can reduce its hardness and wearability.Although carbon fiber hardness is higher, the rib of carbon fiber end face and angle easily cause stress to concentrate, and become the source of fatigue crack initiation; And do not dissolve each other due to carbon and copper, the wetability between them is very poor, and being therefore compounded in Copper substrate is only mechanical bond between carbon constituent element and copper, and bond strength is very low; In order to improve the interface cohesion between carbon constituent element and Copper substrate, people, can in advance at carbon fiber surface plating or chemical plating one deck nickel when preparing properties of carbon fiber reinforced copper composite.But this process costs is very high, be industrially difficult to apply.
Summary of the invention
The problems referred to above existed for prior art and demand, the object of this invention is to provide one Albatra metal--bimetal copper-steel composite and its preparation method and application.
For achieving the above object, the technical solution used in the present invention is as follows:
One Albatra metal--bimetal copper-steel composite is that the carbon steel basic unit being less than or equal to 0.25wt% by carbon content is composited with the copper alloy layer being added with MCMB; The compositing formula of described copper alloy is: tin 3.0 ~ 13.0wt%, nickel 1.0 ~ 5.0wt%, copper 81.5 ~ 99.5wt%, and other impurity content summation is no more than 0.5wt%.
Preferably, particle diameter≤50 μm of described MCMB.
Preferably, the volume fraction of described MCMB in copper alloy layer is 3 ~ 20%.
Prepare a method for described copper alloy-bimetal copper-steel composite, be powder metallurgic method, comprise the steps:
A) copper alloy powder being added with MCMB is layered on equably the surface of carbon steel plate after pretreatment;
B) sinter for the first time (be called for short and just burn) under restitutive protection's atmosphere, in 760 ~ 870 DEG C, sintering time is 15 ~ 100 minutes;
C) by just burn after material on cold-rolling mill, carry out breaking down leveling;
D) again sinter (abbreviation resintering) under restitutive protection's atmosphere, in 850 ~ 960 DEG C, sintering time is 15 ~ 100 minutes;
E) material after resintering is carried out finish rolling leveling on cold-rolling mill.
Preferably, particle diameter≤200 μm of described copper alloy powder.
Preferably, the preparation of described copper alloy powder adopts high-pressure water mist method, comprising: batching-melting-be atomized-dehydrate-screening step.
As further preferred version, smelting temperature is wherein 1300 ~ 1500 DEG C, and the pressure being atomized water under high pressure used is 8 ~ 12MPa.
Preferably, described restitutive protection's atmosphere is the mixed atmosphere of hydrogen, decomposed ammonia or hydrogen and nitrogen.
Preferably, the operation added in copper alloy powder by MCMB is as follows: be 1:(0.022 ~ 0.033 in mass ratio by copper alloy powder and MCMB and adhesive): 0.013 mixes, and then carries out drying.
As further preferred version, described adhesive to be mass percent concentration be 5% ~ 15% polyvinyl alcohol water solution.
As further preferred version, described drying is 80 ~ 120 DEG C of dryings 18 ~ 30 hours.
Due to the hardness of copper alloy of the present invention-bimetal copper-steel composite and coefficient of friction close with existing Allen's metal, therefore, the alternative existing Allen's metal-bimetal copper-steel composite of copper alloy of the present invention-bimetal copper-steel composite is used as material for sliding bearing.
Compared with prior art, copper alloy provided by the invention-bimetal copper-steel composite does not only contain heavy metal lead, meets environmental requirement, but also there is high strength, hardness and mechanical load-bearing capability and excellent anti-wear performance, alternative existing Allen's metal-bimetal copper-steel composite is used as material for sliding bearing; In addition, the preparation technology of material of the present invention is simple, and raw material are cheap and easy to get, are easy to large-scale production, have significant industrial application value.
Accompanying drawing explanation
The stereoscan photograph that be added with the copper alloy layer of MCMB of Fig. 1 prepared by embodiment 3.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in more detail.
Embodiment 1
Experiment purpose: preparation gross thickness is 2.5mm, width is 120mm, the thickness of copper alloy layer is the copper alloy of 0.5mm-bimetal copper-steel composite board.
Preparation process:
A) pretreatment is carried out to carbon steel plate: select carbon content to be less than or equal to the carbon steel plate (as SPCC board) of 0.25wt%, the steel plate shearing opened greatly is become the 2.5mm × 126mm × 625mm of design, after carrying out degreasing and rust removal, change and be rolled to (2.0 ± 0.01) mm × 106mm × 780mm, and smooth, flatness≤0.5mm;
B) copper alloy powder is prepared: adopt high-pressure water mist legal system for copper alloy powder (particle diameter≤200 μm), technological process is: batching-melting-be atomized-dehydrate-screening; Wherein: smelting temperature is 1380 DEG C, the pressure being atomized water under high pressure used is 10MPa; The compositing formula of copper alloy powder is: tin 13.0wt%, nickel 5.0wt%, copper 81.5wt%, and other impurity content summation is 0.5wt%;
C) by copper alloy powder and MCMB (being purchased from Shenzhen City Beiterui New Energy Materials Co., Ltd) and adhesive (mass percent concentration is the polyvinyl alcohol water solution of 10%) in mass ratio for 1:0.022:0.013 mixes, then at 100 DEG C dry 24 hours;
D) be the designing requirement of 0.5mm by copper alloy layer thicknesses, the copper alloy powder being added with MCMB be layered on equably the surface of carbon steel plate after pretreatment, paving powder thickness is about 0.85mm;
E) sinter for the first time (be called for short and just burn) under restitutive protection's atmosphere (decomposed ammonia), in 760 DEG C, sintering time is 20 minutes;
F) carried out on cold-rolling mill cold rolling (breaking down) by the material after just burning, be rolling to the thickness of 2.60mm, precision controlling is at ± 0.01mm;
G) again sinter (abbreviation resintering) under restitutive protection's atmosphere, in 850 DEG C, sintering time is 20 minutes;
H) be rolled on cold-rolling mill (finish rolling) by the material after resintering, after rolling, thickness is 2.50 ± 0.01mm, namely obtains required copper alloy-bimetal copper-steel composite board.
After testing: the volume fraction of MCMB in copper alloy layer is 8.1%, the Vickers hardness of prepared copper alloy layer is 76.3, and coefficient of friction is 0.19; And the Vickers hardness of existing CuSn10Pb10 layer is 73.9, coefficient of friction is 0.21; Copper alloy prepared by explanation-bimetal copper-steel composite board can be used as material for sliding bearing.
Embodiment 2
Experiment purpose: preparation gross thickness is 2.5mm, width is 120mm, the thickness of copper alloy layer is the copper alloy of 0.5mm-bimetal copper-steel composite board.
Preparation process:
A) pretreatment is carried out to carbon steel plate: select carbon content to be less than or equal to the carbon steel plate (as SPCC board) of 0.25wt%, the steel plate shearing opened greatly is become the 2.5mm × 126mm × 625mm of design, after carrying out degreasing and rust removal, change and be rolled to (2.0 ± 0.01) mm × 106mm × 780mm, and smooth, flatness≤0.5mm;
B) copper alloy powder is prepared: adopt high-pressure water mist legal system for copper alloy powder (particle diameter≤200 μm), technological process is: batching-melting-be atomized-dehydrate-screening; Wherein: smelting temperature is 1380 DEG C, the pressure being atomized water under high pressure used is 10MPa; The compositing formula of copper alloy powder is: tin 10.0wt%, nickel 3.0wt%, copper 86.5wt%, and other impurity content summation is 0.5wt%;
C) by copper alloy powder and MCMB (being purchased from Shenzhen City Beiterui New Energy Materials Co., Ltd) and adhesive (mass percent concentration is the polyvinyl alcohol water solution of 10%) in mass ratio for 1:0.027:0.013 mixes, then at 100 DEG C dry 24 hours;
D) be the designing requirement of 0.5mm by copper alloy layer thicknesses, the copper alloy powder being added with MCMB be layered on equably the surface of carbon steel plate after pretreatment, paving powder thickness is about 0.85mm;
E) sinter for the first time (be called for short and just burn) under restitutive protection's atmosphere (decomposed ammonia), in 800 DEG C, sintering time is 20 minutes;
F) carried out on cold-rolling mill cold rolling (breaking down) by the material after just burning, be rolling to the thickness of 2.60mm, precision controlling is at ± 0.01mm;
G) again sinter (abbreviation resintering) under restitutive protection's atmosphere, in 900 DEG C, sintering time is 20 minutes;
H) be rolled on cold-rolling mill (finish rolling) by the material after resintering, after rolling, thickness is 2.50 ± 0.01mm, namely obtains required copper alloy-bimetal copper-steel composite board.
After testing: the volume fraction of MCMB in copper alloy layer is 9.8%, the Vickers hardness of prepared copper alloy layer is 81.1, and coefficient of friction is 0.18; And the Vickers hardness of existing CuSn10Pb10 layer is 73.9, coefficient of friction is 0.21; Copper alloy prepared by explanation-bimetal copper-steel composite board can be used as material for sliding bearing.
Embodiment 3
Experiment purpose: preparation gross thickness is 2.5mm, width is 120mm, the thickness of copper alloy layer is the copper alloy of 0.5mm-bimetal copper-steel composite board.
Preparation process:
A) pretreatment is carried out to carbon steel plate: select carbon content to be less than or equal to the carbon steel plate (as SPCC board) of 0.25wt%, the steel plate shearing opened greatly is become the 2.5mm × 126mm × 625mm of design, after carrying out degreasing and rust removal, change and be rolled to (2.0 ± 0.01) mm × 106mm × 780mm, and smooth, flatness≤0.5mm;
B) copper alloy powder is prepared: adopt high-pressure water mist legal system for copper alloy powder (particle diameter≤200 μm), technological process is: batching-melting-be atomized-dehydrate-screening; Wherein: smelting temperature is 1380 DEG C, the pressure being atomized water under high pressure used is 10MPa; The compositing formula of copper alloy powder is: tin 3.0wt%, nickel 1.0wt%, copper 95.5wt%, and other impurity content summation is 0.5wt%;
C) by copper alloy powder and MCMB (being purchased from Shenzhen City Beiterui New Energy Materials Co., Ltd) and adhesive (mass percent concentration is the polyvinyl alcohol water solution of 10%) in mass ratio for 1:0.033:0.013 mixes, then at 100 DEG C dry 24 hours;
D) be the designing requirement of 0.5mm by copper alloy layer thicknesses, the copper alloy powder being added with MCMB be layered on equably the surface of carbon steel plate after pretreatment, paving powder thickness is about 0.85mm;
E) sinter for the first time (be called for short and just burn) under restitutive protection's atmosphere (decomposed ammonia), in 870 DEG C, sintering time is 20 minutes;
F) carried out on cold-rolling mill cold rolling (breaking down) by the material after just burning, be rolling to the thickness of 2.60mm, precision controlling is at ± 0.01mm;
G) again sinter (abbreviation resintering) under restitutive protection's atmosphere, in 960 DEG C, sintering time is 20 minutes;
H) be rolled on cold-rolling mill (finish rolling) by the material after resintering, after rolling, thickness is 2.50 ± 0.01mm, namely obtains required copper alloy-bimetal copper-steel composite board.
After testing: the volume fraction of MCMB in copper alloy layer is 12.1%, the Vickers hardness of prepared copper alloy layer is 77.6, and coefficient of friction is 0.18; And the Vickers hardness of existing CuSn10Pb10 layer is 73.9, coefficient of friction is 0.21; Copper alloy prepared by explanation-bimetal copper-steel composite board can be used as material for sliding bearing.
The stereoscan photograph that be added with the copper alloy layer of MCMB of Fig. 1 prepared by the present embodiment, as seen from Figure 1: MCMB is uniformly distributed in copper alloy layer.
To sum up experimental result is visible: copper alloy provided by the invention-bimetal copper-steel composite does not only contain heavy metal lead, meets environmental requirement, but also there is high strength, hardness and mechanical load-bearing capability and excellent anti-wear performance, alternative existing Allen's metal-bimetal copper-steel composite is used as material for sliding bearing; In addition, the preparation technology of material of the present invention is simple, and raw material are cheap and easy to get, are easy to large-scale production, have significant industrial application value.
Finally be necessary to herein means out: above embodiment is only for being described in further detail technical scheme of the present invention; can not be interpreted as limiting the scope of the invention, some nonessential improvement that those skilled in the art's foregoing according to the present invention is made and adjustment all belong to protection scope of the present invention.
Claims (10)
1. one Albatra metal--bimetal copper-steel composite, is characterized in that: be that the carbon steel basic unit being less than or equal to 0.25wt% by carbon content is composited with the copper alloy layer being added with MCMB; The compositing formula of described copper alloy is: tin 3.0 ~ 13.0wt%, nickel 1.0 ~ 5.0wt%, copper 81.5 ~ 99.5wt%, and other impurity content summation is no more than 0.5wt%.
2. copper alloy according to claim 1-bimetal copper-steel composite, is characterized in that: particle diameter≤50 μm of described MCMB.
3. copper alloy according to claim 1-bimetal copper-steel composite, is characterized in that: the volume fraction of described MCMB in copper alloy layer is 3 ~ 20%.
4. prepare a method for copper alloy according to claim 1-bimetal copper-steel composite, it is characterized in that, be powder metallurgic method, comprise the steps:
A) copper alloy powder being added with MCMB is layered on equably the surface of carbon steel plate after pretreatment;
B) sinter for the first time (be called for short and just burn) under restitutive protection's atmosphere, in 760 ~ 870 DEG C, sintering time is 15 ~ 100 minutes;
C) by just burn after material on cold-rolling mill, carry out breaking down leveling;
D) again sinter (abbreviation resintering) under restitutive protection's atmosphere, in 850 ~ 960 DEG C, sintering time is 15 ~ 100 minutes;
E) material after resintering is carried out finish rolling leveling on cold-rolling mill.
5. method according to claim 4, is characterized in that: particle diameter≤200 μm of described copper alloy powder.
6. method according to claim 4, is characterized in that: the preparation of described copper alloy powder adopts high-pressure water mist method, comprising: batching-melting-be atomized-dehydrate-screening step.
7. method according to claim 4, is characterized in that: described restitutive protection's atmosphere is the mixed atmosphere of hydrogen, decomposed ammonia or hydrogen and nitrogen.
8. method according to claim 4, it is characterized in that: the operation added to by MCMB in copper alloy powder is as follows: be 1:(0.022 ~ 0.033 in mass ratio by copper alloy powder and MCMB and adhesive): 0.013 mixes, and then carries out drying.
9. method according to claim 8, is characterized in that: described adhesive to be mass percent concentration be 5% ~ 15% polyvinyl alcohol water solution.
10. the copper alloy described in any one of claim 1-3-bimetal copper-steel composite is used as the application of material for sliding bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510107572.4A CN104647827A (en) | 2015-03-11 | 2015-03-11 | Copper alloy-steel bimetallic composite material and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510107572.4A CN104647827A (en) | 2015-03-11 | 2015-03-11 | Copper alloy-steel bimetallic composite material and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104647827A true CN104647827A (en) | 2015-05-27 |
Family
ID=53239685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510107572.4A Pending CN104647827A (en) | 2015-03-11 | 2015-03-11 | Copper alloy-steel bimetallic composite material and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104647827A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106166663A (en) * | 2016-08-29 | 2016-11-30 | 嘉善凯蒂滑动轴承有限公司 | Wrapped bearing bush processing method |
| CN108893635A (en) * | 2018-06-27 | 2018-11-27 | 北京科技大学 | High thermal conductivity isotropism carbonaceous mesophase spherules enhance Cu-base composites preparation method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101301802A (en) * | 2008-06-26 | 2008-11-12 | 上海核威实业有限公司 | Davis bronze-steel composite bimetallic bearing material and manufacturing method thereof |
| US20130157077A1 (en) * | 2010-08-13 | 2013-06-20 | Lihui Wang | Novel Material Used for Bearing Ring and Production Process Thereof |
-
2015
- 2015-03-11 CN CN201510107572.4A patent/CN104647827A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101301802A (en) * | 2008-06-26 | 2008-11-12 | 上海核威实业有限公司 | Davis bronze-steel composite bimetallic bearing material and manufacturing method thereof |
| US20130157077A1 (en) * | 2010-08-13 | 2013-06-20 | Lihui Wang | Novel Material Used for Bearing Ring and Production Process Thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106166663A (en) * | 2016-08-29 | 2016-11-30 | 嘉善凯蒂滑动轴承有限公司 | Wrapped bearing bush processing method |
| CN108893635A (en) * | 2018-06-27 | 2018-11-27 | 北京科技大学 | High thermal conductivity isotropism carbonaceous mesophase spherules enhance Cu-base composites preparation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104789868B (en) | High-strength wearable iron-base bearing | |
| CN102935511B (en) | Method for improving copper-lead alloy metallographic structure sintered by copper-lead alloy powder | |
| CN103409687A (en) | Powder metallurgy supporting seat and preparation method thereof | |
| CN103362954B (en) | A kind of bearing shell and production method thereof with magnetron sputtering self-lubricating composite coating | |
| CN104593712A (en) | Composite Metal Alloy Material | |
| CN102453817A (en) | Zinc alloy special for stamping and manufacturing method thereof | |
| CN107076205A (en) | Sliding bearing or one part, its manufacture method and CuCrZr alloys as material for sliding bearing application | |
| CN103567433A (en) | Powder metallurgy valve seat and preparation method thereof | |
| CN107299300A (en) | A kind of heavy load low abrasion copper base friction material and preparation method thereof | |
| CN104647827A (en) | Copper alloy-steel bimetallic composite material and preparation method and application thereof | |
| CN103480848A (en) | Manufacturing method of high-performance wire-drawing die core | |
| US9027249B2 (en) | Method for producing a lead-free sliding bearing | |
| US9492868B2 (en) | Process for producing a lead-free sliding bearing material | |
| CN102400009A (en) | High-strength wear resistant aluminium yellow brass | |
| CN102935512B (en) | A kind of Cu-Pb Alloy Bearing material peculiar to vessel and preparation method thereof | |
| CN103276339A (en) | Nickel-base tungsten rare earth alloy powder for thermal spraying and preparation method thereof | |
| CN103307109A (en) | Method for manufacturing wear-resistant bearing bush | |
| CN103789569B (en) | Bearing holder material and manufacture method thereof | |
| CN103085395B (en) | Cu-Ti2 AlC functionally gradient material and preparation method thereof | |
| CN104232999A (en) | Wear-resistant zinc alloy and forming method thereof | |
| CN102900663B (en) | Cylinder sleeve and manufacture method thereof | |
| CN102528048B (en) | Method for preparing aluminum bronze and steel bimetallic material | |
| CN107354407A (en) | A kind of heavy load low abrasion copper base friction material and preparation method thereof | |
| CN201603585U (en) | Ball mill lining plate with wear resistance coating layer | |
| CN107447155A (en) | A kind of iron-based powder metallurgy friction material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150527 |