CN106270483A - A kind of iron-based molding compound preparation method - Google Patents
A kind of iron-based molding compound preparation method Download PDFInfo
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- CN106270483A CN106270483A CN201610677772.8A CN201610677772A CN106270483A CN 106270483 A CN106270483 A CN 106270483A CN 201610677772 A CN201610677772 A CN 201610677772A CN 106270483 A CN106270483 A CN 106270483A
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- iron powder
- iron
- graphite
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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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/102—Metallic powder coated with organic material
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Abstract
The open a kind of iron-based molding compound preparation method of the present invention, comprises the following steps: weigh raw material: weigh iron powder, copper powder, graphite, liquid-containing binder, lubricant respectively according to recipe requirements；Infiltration iron powder: liquid-containing binder is joined in iron powder, stands 20 200min, forms moistening iron powder；Batch mixing process: moistening iron powder and graphite, lubricant are put in batch mixer, after being sufficiently mixed；Again copper powder is joined in batch mixer, take out after being sufficiently mixed, obtain compound.The present invention first allows binding agent fully infiltrate iron powder, form moistening iron powder, then graphite easily combines with moistening iron powder, therefore, it is possible to reduce the segregation degree of graphite, particularly " moistening iron powder is joined in batch mixer; after being sufficiently mixed; add graphite ", this situation, and graphite surface is dried, and there is the film of a layer binder on iron powder surface, both are easier to combine.
Description
Technical field
The invention belongs to iron-based molding compound field, especially relate to a kind of iron-based molding compound preparation method.
Background technology
PM technique is that one has material-saving, energy-conservation, low cost, can go out to have nearly end form shape by high-volume die forming
The technology of the features such as the part with dimensional accuracy, its product is in machinery, aviation, particularly automobile, motorcycle and household electric appliances
It is widely applied.Along with the aggravation of competition between progress and the sintered metal product enterprise of society, properties of product are wanted
Ask to come the highest；Enhancing product performance, powdered ingredients is uniformly crucial；The only uniform compound of composition just can be produced high-quality
The product of amount, is also beneficial to powder metallurgy product automated production, thus reduces production cost.In sintered metal product, market accounts for
The amount of having is maximum, and what purposes was the widest is iron-base products.Iron-based compound is usually many by iron powder, alloy powder, graphite, lubricant etc.
Planting into and be grouped into, segregation problems exists always, particularly the segregation of graphite.
Copper powder is to add one of modal alloy powder in iron-based compound, and the addition range spans of copper powder is relatively big,
Iron as disclosed in Application No. CN200510037939.6 Chinese patent literature, copper content is 1-3%, and Application No.
Iron disclosed in CN201310415059.2 Chinese patent literature, copper content is 16-18%；For not cupric or copper content
Less compound, the segregation problems of graphite is easier to solve, but (refers generally to be more than for the compound that copper content is more
The copper of 3wt%), solve more difficulty, the Chinese patent literature such as Application No. 201110048677.9 is pointed out, Japan,
The developed country such as Sweden, the U.S. successively have developed segregation-free bond powders, adds as introduced the liquid adhesive low-gravity that bonds
Add agent, such as graphite and lubricant, but limited for the heavyweight additive bond effect such as copper powder or nikel powder；Application No.
The Chinese patent literature of 00121777.1 discloses a kind of iron-graphite composite powder, but it is little to require that powder composite mixture contains
In the copper of about 3%.Certainly, the degree reducing graphite segregation can be improved by the amount increasing binding agent, but increases binding agent
Amount, the processing performance of compound can be made to be deteriorated, as mobility be deteriorated.
Summary of the invention
In order to solve above-mentioned the problems of the prior art, the application proposes a kind of iron-based molding compound preparation method.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of iron-based molding compound preparation method, it is characterised in that comprise the following steps:
(1) raw material is weighed: weigh iron powder, copper powder, graphite, liquid-containing binder, lubricant respectively according to recipe requirements；
(2) infiltration iron powder: liquid-containing binder is joined in iron powder, stands 20-200min, forms moistening iron powder；
(3) batch mixing process: moistening iron powder and graphite, lubricant are put in batch mixer, after being sufficiently mixed；Again copper powder is added
Enter in batch mixer, take out after being sufficiently mixed, obtain compound.
Scheme further, described step (3) is: first moistening iron powder and graphite are joined in batch mixer, after being sufficiently mixed,
Add copper powder, lubricant, take out after being sufficiently mixed, obtain compound.
Scheme further, described step (3) is: first moistening iron powder is joined in batch mixer, after being sufficiently mixed, adds stone
Ink, after being sufficiently mixed, adds copper powder, lubricant, takes out, obtain compound after being sufficiently mixed.
Scheme further, described liquid-containing binder is bobbin oil, and weight percent content is 0.05-0.15%；Described profit
Lubrication prescription is zinc stearate, and weight percent content is 0.20-1.5%；Described copper powder weight percent content is 0-25%, described
Graphite weight percent content is 0-1.2%, and surplus is iron powder.
Scheme further, described copper powder weight percent content is 3-20%；Described graphite weight percent content is
0.3-1.2%.
Scheme further, described batch mixer is biconial batch mixer.
Compared with prior art, the application has the beneficial effect that:
The reason of powder segregation is mainly the difference of density, and the density of copper about 8.9g/cm3, the density of ferrum about 7.86g/
cm3, both density contrasts are not the biggest；The density of graphite about 2.1g/cm3, graphite is bigger with the density difference of ferrum；The application
Various raw materials being added separately to, first allows binding agent fully infiltrate iron powder, form moistening iron powder, then graphite is easily and moistening iron powder
In conjunction with, therefore, it is possible to reduce the segregation degree of graphite, particularly " moistening iron powder is joined in batch mixer, after being sufficiently mixed, adds
Enter graphite ", this situation, graphite surface is dried, and there is the film of a layer binder on iron powder surface, and both are easier to combine.
Common mixing method is iron powder, graphite, copper powder, binding agent, lubricant etc. to be put in batch mixer together carry out
Mixing, understands some binding agent and is attached to Copper Powder Surface, due to many-sides such as the surface energy of iron powder and copper powder, oxidisability
Difference, the copper powder combination degree that binding agent has been adhered on graphite and surface is poor；When copper powder content increases, it is attached to copper powder
On binding agent will increase, comparatively speaking, the binding agent being attached on iron powder will reduce, when therefore copper powder is more, graphite
Segregation degree can increase.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment 1
A kind of iron-based molding compound preparation method, comprises the following steps:
(1) raw material is weighed: weigh iron powder, copper powder 18%, graphite 1%, bobbin oil 0.08%, hard respectively according to recipe requirements
Fat acid zinc 0.8%；
(2) infiltration iron powder: bobbin oil is joined in iron powder, stands 20-200min, forms moistening iron powder；
(3) batch mixing process: graphite, the lubricant weighed in moistening iron powder and (1) is put in biconial batch mixer, fully
After mixing；Again copper powder is joined in batch mixer, take out after being sufficiently mixed, obtain compound.
Embodiment 2
The present embodiment is as different from Example 1: described step (3) batch mixing process is: first moistening iron powder and graphite are added
Enter in batch mixer, after being sufficiently mixed, add copper powder, lubricant, take out after being sufficiently mixed, obtain compound.
Embodiment 3
The present embodiment is as different from Example 1: described step (3) batch mixing process is: first moistening iron powder is joined mixed
In material machine, after being sufficiently mixed, add graphite, after being sufficiently mixed, add copper powder, lubricant, take out after being sufficiently mixed, mixed
Close material.
Comparative example 1
(1) raw material is weighed: weigh iron powder, copper powder 18%, graphite 1%, bobbin oil 0.08%, hard respectively according to recipe requirements
Fat acid zinc 0.8%；
(2) infiltration iron powder: bobbin oil is joined in iron powder, makes oil-containing iron powder；
(3) batch mixing process: oil-containing iron powder is joined in biconial batch mixer together with graphite, lubricant, copper powder, fully
Take out after mixing, obtain compound.
Comparative example 2
(1) raw material is weighed: weigh iron powder, copper powder 18%, graphite 1%, bobbin oil 0.08%, hard respectively according to recipe requirements
Fat acid zinc 0.8%；
(2) preparing masterbatch: iron powder is divided into 9 parts, portion adds copper powder, and portion adds graphite, and portion adds bobbin oil, a stiffened
Fat acid zinc, every part of material is the most mixed by hand；
(3) batch mixing process: use following manner charging, the iron powder+iron powder of the iron powder+iron powder of iron powder+add copper powder+add graphite
+ add the iron powder+iron powder of the iron powder+iron powder of bobbin oil+add zinc stearate, take out after being sufficiently mixed, obtain compound.
When copper content is less, beneficial effects of the present invention is inconspicuous, (no less than 3wt%) when copper content is higher, useful
Effect is obvious, and in order to absolutely prove beneficial effects of the present invention, embodiment chooses copper content and the more mix material proportioning of graphite
Contrasting, the method that comparative example 1 is commonly used for general enterprises, process is relatively simple, and comparative example 2 is professional book (Zhou Zuoping Shen
Little flat. powder metallurgy mechanical parts practical technique [M]. Chemical Industry Press, 2006.P99) method recommended, process is more
Complicated.
The compound preparing each embodiment and comparative example, carries out composition detection, with sampler, from the different portions of barrel
Position takes 6 parts of material samples；In order to get rid of the existence of bobbin oil and zinc stearate, the impact on detection carbon content, it is pressed into's
Cylinder blank, is incubated 30min at 900 DEG C, takes powder afterwards, carry out chemical analysis, the result obtained such as table 1.From embodiment and right
Proportional components testing result is it can be seen that several Style of mixing powder is little on the impact of copper, but bigger to the composition influence of graphite.
Table 1 compound composition detection result wt%
The above-mentioned description to embodiment is to be understood that for ease of those skilled in the art and apply this
Bright.Case study on implementation obviously easily can be made various amendment by person skilled in the art, and described herein one
As principle be applied in other embodiments without through performing creative labour.Therefore, the invention is not restricted to enforcement case here
Example, those skilled in the art are according to the announcement of the present invention, and the improvement made without departing from scope and amendment all should be
Within protection scope of the present invention.
Claims (6)
1. an iron-based molding compound preparation method, it is characterised in that comprise the following steps:
(1) raw material is weighed: weigh iron powder, copper powder, graphite, liquid-containing binder, lubricant respectively according to recipe requirements；
(2) infiltration iron powder: liquid-containing binder is joined in iron powder, stands 20-200min, forms moistening iron powder；
(3) batch mixing process: moistening iron powder and graphite, lubricant are put in batch mixer, after being sufficiently mixed；Again copper powder is joined
In batch mixer, take out after being sufficiently mixed, obtain compound.
Iron-based molding compound preparation method the most according to claim 1, it is characterised in that described step (3) is: first handle
Moistening iron powder and graphite join in batch mixer, after being sufficiently mixed, add copper powder, lubricant, take out, obtain after being sufficiently mixed
Compound.
Iron-based molding compound preparation method the most according to claim 1, it is characterised in that described step (3) is: first handle
Moistening iron powder joins in batch mixer, after being sufficiently mixed, adds graphite, after being sufficiently mixed, adds copper powder, lubricant, fully
Take out after mixing, obtain compound.
Iron-based molding compound preparation method the most according to claim 1, it is characterised in that described liquid-containing binder is ingot
Seed oil, weight percent content is 0.05-0.15%；Described lubricant is zinc stearate, and weight percent content is 0.20-
1.5%；Described copper powder weight percent content is 0-25%, and described graphite weight percent content is 0-1.2%, and surplus is iron powder.
Iron-based molding compound preparation method the most according to claim 4, it is characterised in that described copper powder percentage by weight
Content is 3-20%；Described graphite weight percent content is 0.3-1.2%.
Iron-based molding compound preparation method the most according to claim 1, it is characterised in that described batch mixer is biconial
Batch mixer.
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| CN201610677772.8A CN106270483B (en) | 2016-08-16 | 2016-08-16 | A kind of iron-based shaping mixing preparation method for material |
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| CN201610677772.8A CN106270483B (en) | 2016-08-16 | 2016-08-16 | A kind of iron-based shaping mixing preparation method for material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107598157A (en) * | 2017-09-20 | 2018-01-19 | 建德市易通金属粉材有限公司 | Auto parts machinery bonds mixed powder and preparation method thereof with segregation-free iron copper carbon |
| CN111702167A (en) * | 2020-06-24 | 2020-09-25 | 重庆科利得精密机械工业有限公司 | Three-step mixing process for iron-based powder metallurgy |
| CN112077297A (en) * | 2020-08-11 | 2020-12-15 | 莱芜钢铁集团粉末冶金有限公司 | Production process of novel segregation-free bonded mixed iron powder |
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| JPH01219101A (en) * | 1988-02-25 | 1989-09-01 | Kobe Steel Ltd | Iron powder for powder metallurgy and production thereof |
| US20020108468A1 (en) * | 2000-10-06 | 2002-08-15 | Kawasaki Steel Corporation | Iron-based powders for powder metallurgy |
| CN102069187A (en) * | 2011-03-01 | 2011-05-25 | 杭州寰宇粉体科技有限公司 | Mixing method of iron-based powder metallurgy bonding powder |
| CN103394686A (en) * | 2013-07-25 | 2013-11-20 | 莱芜钢铁集团有限公司 | Two-stage dry mixing method for powder metallurgy iron-based mixed powder |
| CN104070168A (en) * | 2014-06-30 | 2014-10-01 | 张家港振江粉末冶金制品有限公司 | High-wear-resistance rolling oil-retaining bearing for chain and preparation method for same |
| CN105328179A (en) * | 2015-10-20 | 2016-02-17 | 江门市前通粉末冶金厂有限公司 | Technology for effectively reducing segregation of powder stock stirring |
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2016
- 2016-08-16 CN CN201610677772.8A patent/CN106270483B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01219101A (en) * | 1988-02-25 | 1989-09-01 | Kobe Steel Ltd | Iron powder for powder metallurgy and production thereof |
| US20020108468A1 (en) * | 2000-10-06 | 2002-08-15 | Kawasaki Steel Corporation | Iron-based powders for powder metallurgy |
| CN102069187A (en) * | 2011-03-01 | 2011-05-25 | 杭州寰宇粉体科技有限公司 | Mixing method of iron-based powder metallurgy bonding powder |
| CN103394686A (en) * | 2013-07-25 | 2013-11-20 | 莱芜钢铁集团有限公司 | Two-stage dry mixing method for powder metallurgy iron-based mixed powder |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107598157A (en) * | 2017-09-20 | 2018-01-19 | 建德市易通金属粉材有限公司 | Auto parts machinery bonds mixed powder and preparation method thereof with segregation-free iron copper carbon |
| CN111702167A (en) * | 2020-06-24 | 2020-09-25 | 重庆科利得精密机械工业有限公司 | Three-step mixing process for iron-based powder metallurgy |
| CN112077297A (en) * | 2020-08-11 | 2020-12-15 | 莱芜钢铁集团粉末冶金有限公司 | Production process of novel segregation-free bonded mixed iron powder |
| CN112077297B (en) * | 2020-08-11 | 2023-02-21 | 山东鲁银新材料科技有限公司 | Production process of novel segregation-free bonded mixed iron powder |
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