CN107931619B - Cam is pre-sintered base and its application method - Google Patents
Cam is pre-sintered base and its application method Download PDFInfo
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- CN107931619B CN107931619B CN201711305211.6A CN201711305211A CN107931619B CN 107931619 B CN107931619 B CN 107931619B CN 201711305211 A CN201711305211 A CN 201711305211A CN 107931619 B CN107931619 B CN 107931619B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Composite Materials (AREA)
- Gears, Cams (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Powder Metallurgy (AREA)
Abstract
A kind of cam pre-sintering base, parent metal is Fe, it include: 2.5%≤Cr content≤4.0%, 2.0%≤C content≤3.5%, 0.4%≤Si content≤1.2%, 0.1%≤Zr content≤0.7%, 0.1%≤W content≤0.7%, and meet simultaneously: Cu content≤0.02%, Mn content≤0.02%, Zr content+W content≤0.4 × (C content+Si content).The cam, which is pre-sintered base and is assemblied in mandrel material when in use, needs recessed portion on cams mounted position, one layer of copper alloy sheet of middle pad is sintered the camshaft for obtaining and being firmly combined, and the ingredient of the copper alloy sheet is pre-sintered the Composition Control of base according to the cam.
Description
Technical field
This application involves powder metallurgical technologies, and in particular to a kind of cam is pre-sintered base and its application method, this is convex
Wheel is pre-sintered base mainly for the manufacture of cam and the sintered combined camshaft of mandrel.
Background technique
Powder metallurgy is to produce metal powder or made with metal powder (or mixture of metal powder and non-metal powder)
For raw material, by shaping and being sintered, the technology of manufacture metal material, composite material and various types product.Powder smelting
The prominent advantage of gold process be can easily realize a plurality of types of materials compound or a variety of component it is compound, before realization
Person's compound tense can make material give full play to the respective characteristic of each constituent element, when realizing the latter's compound tense, may be implemented various common
Connection, reparation or the manufacture that processing technology cannot achieve.
Camshaft is engine air distribution system key components and parts, and powder metallurgy combined sintering technique is a kind of novel combination
Formula camshaft preparation process, relative to tradition such as casting, forging technology integral type solid camshaft produced, Combined cam
Axis has a variety of advantages such as hollow structure loss of weight is obvious, dimensional accuracy is high, machining allowance is small, flexible design, energy-saving material-saving, extensively
Applied to a variety of medium and high classes petrol engines and diesel engine.Currently, in the automobile camshaft of the country such as America and Europe production, powder
Last metallurgy camshaft has accounted for significant proportion, and in the domestic camshaft in China, powder metallurgy camshaft does not reach industry still
Scale, but some related manufacturing enterprises, China or colleges and universities, research institute have also carried out a series of research of powder metallurgy camshafts, example
Such as application No. is 201510599200.8 Chinese patent applications to be related to a kind of preparation method of P/M cam, by cam green compact
Inside and outside two parts are divided into, cam outer ring uses high-carbon sintered steel, and cam inner ring is low-carbon sintered steel, respectively by above-mentioned mixed powder
It is 6.5~7.4g/cm3's that cam outer ring green compact that density is 6.25~7.4g/cm3 and density are pressed on press
The inner hole of the inner ring embedded cam outer ring of cam is sintered by cam inner ring green compact, heat treatment, will be sintered according to technical requirements and hot
Defined size is processed and be ground to the cam mechanism of processing.
The above-mentioned technology that cam outer ring, inner ring are used to the combination of different performance powdered metallurgical material has actually been ability
The technology of research is set about in domain already, and this kind of technical concerns point is the differentiation design of the Internal and external cycle strength of materials, to material itself
Intensity, machinability and sinterability etc. between relationship do not have deep announcement, also proposed not in terms of sintering process more effective
Suggestion, there is also complex process, defect at high cost for itself.
Summary of the invention
To solve the above problems, the present invention proposes that a kind of cam is pre-sintered base and its application method, improve mandrel with
On the basis of the sintering Joining Technology of cam, closely related powder is needed with bonding strength and working performance by rationally designing
Raw material obtains the sintering camshaft product of high-quality using lower cost.
The purpose of the present invention is what is be achieved through the following technical solutions.
A kind of cam is pre-sintered base, and it is Fe which, which is pre-sintered base parent metal, comprising following weight percent at
Point: 2.5%≤Cr content≤4.0%, 2.0%≤C content≤3.5%, 0.4%≤Si content≤1.2%, and meet simultaneously: Cu
Content≤0.02%, Mn content≤0.02%.
Above-mentioned cam is pre-sintered base, further includes the ingredient of following weight percent: 0.1%≤Zr content≤0.7%, 0.1%
≤ W content≤0.7%, and meet simultaneously: Zr content+W content≤0.4 × (C content+Si content).
Above-mentioned cam is pre-sintered base, is by the metal powder of each ingredient or pre-alloyed powder through mixed powder --- it is cold-pressed into
The step of type --- hot pressed sintering or pressureless sintering, is made, and the temperature of the hot pressed sintering or pressureless sintering is no more than 1000
DEG C, sintering time is no more than 90min.
Above-mentioned cam is pre-sintered the application method of base, comprising: selection diameter seamless pipe identical with required cam shaft diameter
As mandrel material, machining or chemical attack are carried out to the mandrel material, cams mounted position will be needed to be processed into
Recessed portion wraps up one layer of copper alloy sheet in the recessed portion, and cam pre-sintering base is mounted on to be enclosed with copper alloy thin
The recessed portion of piece obtains assembly parts, and the assembly parts are put into sintering furnace and are sintered, and is pre-sintered by the cam
The further sintering shrinkage effect of base and the copper alloy sheet melt generated soldering effect and the cam are pre-sintered base
Firm one is combined into the mandrel.
Above-mentioned cam is pre-sintered the application method of base, and the ingredient of the copper alloy sheet used includes at least 2.0% at most
4.0% Mn, and meet simultaneously: Cu content >=90.0%, Zn content+Sn content≤5.0%, Si content≤2.0%.
The beneficial effects of the present invention are:
1, the present invention is based on the improvement to the sintered combined technique of camshaft, select the cam of special component be pre-sintered base and at
Product seamless pipe is sintered compound, bond strength height, and process costs are low；
2, cam of the invention is pre-sintered base, and when in use, compared with prior art, important improvement point is to mandrel material
Material carries out machining or chemical attack, and cams mounted position will be needed to be processed into recessed portion, on the one hand which saves
The cleaning and polishing step in assembling link to mandrel assembly position are saved, it is most important that construct the sintering of cam and mandrel
The mechanical snap in face enables subsequent sintering dynamic process to completely enclose this by the structural dimension optimization design to recessed portion
Recessed portion is pre-sintered the further sintering shrinkage effect of base by the cam and the copper alloy sheet melts generated pricker
The cam is pre-sintered base for weldering effect and the mandrel is combined into firm one；
3, cam of the invention is pre-sintered base, on ingredient, due to the machine of the sintered surface by constructing cam and mandrel
Tool is engaged and the cam is pre-sintered base and is combined into firm one in sintering with the mandrel, therefore can be by Cr, C
Within the scope of equal size is limited to reasonably, become these constituent contents without merely in order to improve the intensity of sintered interface
Must be very high, to influence processing performance, by the restriction to Zr, W equal size, the enrichment of simple carbide is avoided, and pass through
Limitation to Cu and Mn in cam pre-sintering base ingredient and the restriction to Cu and Mn in copper alloy sheet ingredient, so that Cu
The sintered interface of the cam and mandrel is concentrated on Mn with being more likely to, to reduce sintered interface under mechanical load or impact
Brittleness so that the intensity of sintered products, machinability and sinterability obtain the coordinating and unifying.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 is that cam of the invention is pre-sintered blank structure schematic diagram.
Fig. 2 is that cam of the invention is pre-sintered assembling structure schematic diagram of base when complex sintered with mandrel.
Component representated by each appended drawing reference in figure are as follows: 1, mandrel, 2, copper alloy sheet, 3, cam pre-sintering base.
Specific embodiment
The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although showing this public affairs in attached drawing
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated here
The mode of applying is limited.It is to be able to thoroughly understand the disclosure on the contrary, providing these embodiments, and can be by this public affairs
The range opened is fully disclosed to those skilled in the art.
Embodiment 1
A kind of cam is pre-sintered base, and it is Fe which, which is pre-sintered base parent metal, comprising following weight percent at
Point: 2.5%≤Cr content≤4.0%, 2.0%≤C content≤3.5%, 0.4%≤Si content≤1.2%, and meet simultaneously: Cu
Content≤0.02%, Mn content≤0.02%.
Above-mentioned cam is pre-sintered base, further includes the ingredient of following weight percent: 0.1%≤Zr content≤0.7%, 0.1%
≤ W content≤0.7%, and meet simultaneously: Zr content+W content≤0.4 × (C content+Si content).
Above-mentioned cam is pre-sintered base, is by the metal powder of each ingredient or pre-alloyed powder through mixed powder --- it is cold-pressed into
The step of type --- hot pressed sintering or pressureless sintering, is made, and the temperature of the hot pressed sintering or pressureless sintering is no more than 1000
DEG C, sintering time is no more than 90min.
Above-mentioned cam is pre-sintered the application method of base, includes the following steps: in use
Step 1, it selects diameter seamless pipe identical with required cam shaft diameter as 1 material of mandrel, is cut into required length
Degree, clears up notch or is polished, and the cutting mode is cutting saw cut, plasma cut or laser cutting, the nothing
Slit-tube material is carbon steel；
Step 2, mark is carried out to the mandrel material that step 1 obtains, needs cams mounted position to mark；
Step 3, the mandrel material obtained to step 2 carries out machining or chemical attack, described in marking
Cams mounted position is needed to be processed into slight recessed portion, the slight recessed portion refers to that depth dimensions are 0.2-1.0
The recessed portion of millimeter；
Step 4, the recessed portion of 1 material of the mandrel obtained in step 3 wraps up one layer of copper alloy sheet 2, described
Copper alloy sheet 2 with a thickness of 0.25-1.2 millimeters；
Step 5, the prefabricated cam mandrel 1 that base is obtained with step 4 is pre-sintered to assemble, it will be described convex
Wheel is pre-sintered base and is mounted on the recessed portion for being enclosed with copper alloy sheet 2, the cam be pre-sintered the axial length of base with it is described recessed
Sunken axial length adaptation, length of the equal or slightly larger than described copper alloy sheet 2 on the axial direction are described slightly larger than being
Refer to the size Control exceeded within 4 millimeters；
Step 6, assembly parts step 5 obtained, which are put into sintering furnace, to be sintered, first with the heating not less than 9 DEG C/min
Rate rises to 940 DEG C of -980 DEG C of heat preservation 5-30min, then rises to 1070 DEG C of -1190 DEG C of heat preservations with the heating rate of 5-10 DEG C/min
25-300min is pre-sintered produced by the effect of further sintering shrinkage and copper alloy sheet fusing of base by the cam
Soldering effect the cam be pre-sintered base and the mandrel be combined into firm one；
Step 7, the cam of the sintered products obtained to step 6 is finished to get finished product.
Above-mentioned cam is pre-sintered the application method of base, and the ingredient of the copper alloy sheet used includes at least 2.0% at most
4.0% Mn, and meet simultaneously: Cu content >=90.0%, Zn content+Sn content≤5.0%, Si content≤2.0%.
Embodiment 2
The embodiment is that the restriction of base ingredient is pre-sintered to cam in embodiment 1 comprising following weight percent at
Divide (matrix Fe): Cr content is 2.5%, and C content 3.5%, Si content is that 0.6%, Zr content is 0.2%, and W content is
0.5%, Cu content are that 0.01%, Mn content is 0.01%.
Embodiment 3
The embodiment and embodiment 2 the difference is that, the cam is pre-sintered base comprising following weight percent
Ingredient (matrix Fe): Cr content be 3.9%, C content 2.0%, Si content is that 1.1%, Zr content is 0.7%, and W content is
0.1%, Cu content are that 0.01%, Mn content is 0.01%.
Embodiment 4
The embodiment and embodiment 2 the difference is that, the cam is pre-sintered base comprising following weight percent
Ingredient (matrix Fe): Cr content be 3.2%, C content 2.8%, Si content is that 0.9%, Zr content is 0.4%, and W content is
0.3%, Cu content are that 0.01%, Mn content is 0.01%.
Embodiment 5
The embodiment is the restriction to the ingredient of copper alloy sheet 2 described in embodiment 2-4, the copper alloy sheet 2
Ingredient includes 4.0% Mn, 4.0% Zn, remaining is Cu and inevitable impurity.
Embodiment 6
The present embodiment difference from Example 5 is: the ingredient of the copper alloy sheet 2 includes 2.0% Mn, and 2.0%
Zn, 2.0 Sn, 1.0% Si, remaining be Cu and inevitable impurity.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of the claim
Subject to enclosing.
Claims (5)
1. the application method that a kind of cam is pre-sintered base, which is characterized in that it is Fe that used cam, which is pre-sintered base parent metal,
It includes the ingredient of following weight percent: 2.5%≤Cr content≤4.0%, 2.0%≤C content≤3.5%, 0.4%≤Si contains
Amount≤1.2%, 0.1%≤Zr content≤0.7%, 0.1%≤W content≤0.7%, and meet simultaneously: Cu content≤0.02%, Mn
Content≤0.02%, Zr content+W content≤0.4 × (C content+Si content)；
The application method includes: to select diameter seamless pipe identical with required cam shaft diameter as mandrel material, to described
Mandrel material carries out machining or chemical attack, cams mounted position will be needed to be processed into recessed portion, in the recessed portion
One layer of copper alloy sheet is wrapped up, cam pre-sintering base is mounted on and is enclosed with the recessed portion of copper alloy sheet and is assembled
Part, and the assembly parts are put into sintering furnace and are sintered, the further sintering shrinkage of base is pre-sintered by the cam
Effect and the copper alloy sheet melt generated soldering effect and cam pre-sintering base and the mandrel are combined into jail
Solid one；
The seamless pipe material is carbon steel, and the recessed portion depth dimensions are 0.2-1.0 millimeters, the thickness of the copper alloy sheet
Degree is 0.25-1.2 millimeters.
2. the application method that cam according to claim 1 is pre-sintered base, which is characterized in that the copper alloy sheet at
Divide the Mn including at least 2.0% at most 4.0%, and meet simultaneously: Cu content >=90.0%, Zn content+Sn content≤5.0%, Si contains
Amount≤2.0%.
3. a kind of cam is pre-sintered base, which is characterized in that it is that cam of any of claims 1 or 2 is pre- that the cam, which is pre-sintered base,
Cam used in the application method of sintered blank is pre-sintered base.
4. cam according to claim 3 is pre-sintered base, which is characterized in that the cam is pre-sintered base, is by each ingredient
Metal powder or pre-alloyed powder be made through mixed powder --- cold moudling --- hot pressed sintering or the step of pressureless sintering.
5. cam according to claim 4 is pre-sintered base, which is characterized in that the hot pressed sintering or the temperature of pressureless sintering
No more than 1000 DEG C, sintering time is no more than 90min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711305211.6A CN107931619B (en) | 2017-12-11 | 2017-12-11 | Cam is pre-sintered base and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711305211.6A CN107931619B (en) | 2017-12-11 | 2017-12-11 | Cam is pre-sintered base and its application method |
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| CN107931619A CN107931619A (en) | 2018-04-20 |
| CN107931619B true CN107931619B (en) | 2019-11-29 |
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| CN112355310B (en) * | 2020-11-12 | 2021-09-28 | 三阳纺织有限公司 | Method for manufacturing cam part and application in textile machinery |
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Effective date of registration: 20191108 Address after: Taizhou City, Zhejiang province 317500 Wenling City Ruo Heng Zhen Pu tou Cun Guang Chang Lu Applicant after: Wenling Dingli Standard Parts Co.,Ltd. Address before: 201318 4th Floor, Building 1-9, Lane 99, Shenmei Road, Pudong New Area, Shanghai Applicant before: SHANGHAI KUISHU AUTOMATION TECHNOLOGY CO.,LTD. |
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Denomination of invention: Cam pre-sintered blank and method of using the same Effective date of registration: 20220812 Granted publication date: 20191129 Pledgee: Zhejiang Wenling Rural Commercial Bank Co.,Ltd. Pledgor: Wenling Dingli Standard Parts Co.,Ltd. Registration number: Y2022330001730 |