CN102560234A - Powdered alloy steel for powder metallurgy - Google Patents
Powdered alloy steel for powder metallurgy Download PDFInfo
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- CN102560234A CN102560234A CN2010105844963A CN201010584496A CN102560234A CN 102560234 A CN102560234 A CN 102560234A CN 2010105844963 A CN2010105844963 A CN 2010105844963A CN 201010584496 A CN201010584496 A CN 201010584496A CN 102560234 A CN102560234 A CN 102560234A
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Abstract
The invention relates to powdered alloy steel for powder metallurgy. The pre-alloyed powder contains iron-based powder containing less than 0.5% by mass of manganese and 0.2-1.5% by mass of molybdenum, wherein the powdered alloy steel containing 0.05-1.0% by mass of molybdenum is adhered on the surface of the iron-based powder; and 0.2-5% by mass of nickel powder or 0.2-3% by mass of copper power are added in the powdered alloy steel. The powdered alloy steel has the advantages that production cost is low, and product property is excellent; by using the powdered alloy steel, a sintered body having good pulling strength, fatigued bending strength and compact structure can be prepared; and the powdered alloy steel can be used for preparing a high-density high-strength powdered alloy structure.
Description
Technical field
The present invention relates to powder metallurgical technology, especially a kind of Powdered Alloy Steel of powder used in metallurgy.
Background technology
PM technique; Can be with the parts of the shape production requirement high dimensional accuracy extremely close, complicated shape with article shape; Can reduce the cutting cost significantly, therefore, sintered metal product is as the parts of various machineries, device and be utilized in a lot of faces.
Generally speaking; Alloy such as mixing graphite powder is with lubricant powders such as powder and Triple Pressed Stearic Acid, lithium stearates and after forming the iron-based powder mixtinite in iron-based powder; This iron-based powder mixtinite is filled into metal die, press molding and make powder metallurgical with iron-based powder molding (press-powder body).
Wherein, iron-based powder can be divided into iron powder, Powdered Alloy Steel etc. according to composition, and iron-based powder can also be divided into atomized iron powder, reduced iron powder etc. according to method of manufacture.
The density of iron-based powder molding is generally 6.6～7.1 milligrams every cubic metre, further implements sintering processes and forms sintered compact for these iron-based powder moldinies, and implement finishing, cut as required and form sintered metal product.And when needing to improve tensile strength, fatigue strength, also implement carburizing thermal treatment, bright heat treatment behind the sintering.
In recent years, for miniaturized, the lightweight of parts,, the requirement of intensity is improved gradually as the characteristic of the sintered metal product of iron class.In order to improve the intensity of sintered metal product, generally in iron-based powder, add alloying element nickel, copper, molybdenum, tungsten, antimony etc.
And; As the mode of adding alloying element, the mode that has the mode (prealloy) that makes the iron-based powder alloying, alloy is mixed together with powder and sticker and iron-based powder, do not use sticker and the blended mode and the powder that will contain alloying element mix with iron-based powder afterwards in the high temperature maintenance and with metallurgical form bonded mode (diffusion is adhered to).In each mode, differences such as the uniformity coefficient of alloying element, the disperse state when characteristic of each Powdered Alloy Steel (or mixed powder), sintering.Therefore, the selection of alloying element and the selection of addition manner become the important factor of reaching target Powdered Alloy Steel quality.
Summary of the invention
In order to overcome above defective, the technical problem that the present invention will solve is: propose a kind of intensity and good alloy steel powder for powder metallurgy of bending fatigue strength of drawing high.
The technical scheme that the present invention adopted is: a kind of alloy steel powder for powder metallurgy; Comprise the manganese that contains below the 0.5 quality % in the said pre-alloyed powder; 0.2 the iron-based powder of the molybdenum of～1.5 quality %; Said iron-based powder surface attachment has the Alloy Steel Powder that contains molybdenum 0.05～1.0 quality %, is added with nickel powder or copper powder in the said Alloy Steel Powder.
According to another preferred embodiment, a kind of alloy steel powder for powder metallurgy further comprise the said powdered alloy that contains molybdenum be by the compound that contains molybdenum with said iron-based powder blended state under reduction generate.
According to another preferred embodiment, a kind of alloy steel powder for powder metallurgy comprises that further nickel powder is that 0.2～5 quality % or copper powder are 0.2～3 quality % in the said Alloy Steel Powder.
According to another preferred embodiment, a kind of alloy steel powder for powder metallurgy comprises that further said nickel powder or copper powder are electrolytic nickel powder or electrolytic copper powder.
According to another preferred embodiment, a kind of alloy steel powder for powder metallurgy further comprise said nickel powder or copper powder granularity smaller or equal to 45 microns.
According to another preferred embodiment, a kind of alloy steel powder for powder metallurgy further comprises and is added with the polymer class tackiness agent in the said Powdered Alloy Steel.
According to another preferred embodiment, a kind of alloy steel powder for powder metallurgy comprises that further said polymer class tackiness agent is resol class, polyethylene kind or viton class tackiness agent.
The invention has the beneficial effects as follows: production cost is low, and high product performance can produce and has the good sintered compact that draws high intensity and flexural strength fatigue and compact structure, can be used for making high-density, high-intensity powder metallurgy structural part.
Embodiment
A kind of alloy steel powder for powder metallurgy; Comprise the manganese that contains below the 0.5 quality % in the said pre-alloyed powder; 0.2 the iron-based powder of the molybdenum of～1.5 quality %; Said iron-based powder surface attachment has the Alloy Steel Powder that contains molybdenum 0.05～1.0 quality %, is added with nickel powder or copper powder in the said Alloy Steel Powder.
The powdered alloy that contains molybdenum of the present invention be by the compound that contains molybdenum with said iron-based powder blended state under reduction generate; Just be utilized in and the reduction down of iron-based powder blended state; The compound that contains molybdenum is reduced on the surface of iron-based powder; Become the powdered alloy that contains molybdenum, spread effectively on this iron-based powder surface simultaneously and adhere to.
Nickel powder is that 0.2～5 quality % or copper powder are 0.2～3 quality % in the Alloy Steel Powder of the present invention, and nickel powder or copper powder are electrolytic nickel powder or electrolytic copper powder, and the granularity of nickel powder or copper powder is smaller or equal to 45 microns.
Be used for alloy steel powder for powder metallurgy of the present invention, on Mo-contained alloy powder and position that iron-based powder contacts, the part of the molybdenum in the Mo-contained alloy powder is diffused in the particle of iron-based powder.
Be added with the polymer class tackiness agent in the Powdered Alloy Steel of the present invention, can select commercially available resol class, polyethylene kind or viton class tackiness agent for use, wherein contracting with Z 150PH, olefine aldehydr and styrene-butadiene rubber(SBR) are the preferred tackiness agent that uses.
The use of this tackiness agent; Guaranteed the uniform mixing of alloying element powder and iron powder and in the even bonding on ferrous powder granules surface; Reached the effect of segregation-free batch mixing, the uniformity consistency of DIFFUSION TREATMENT and the steady quality of dispersion pattern Powdered Alloy Steel product have all been played decisive role.
The manufacturing processed of Powdered Alloy Steel of the present invention is:
At first with the molybdenum of specified amount and manganese as alloying constituent in advance, the powdered alloy that contains molybdenum is as the molybdenum raw material powder.Wherein the molybdenum raw material powder can use the metal molybdenum powder or contain the powdered alloy of molybdenum, perhaps also can use the molybdate compound of Mo-contained alloy powder.
Then, above-mentioned iron-based powder and the molybdenum raw material powder of mixed to stipulate.In order to improve the tack of iron-based powder and molybdenum raw material powder, also can in the scope of 0.1 quality %, add the spindle wet goods.
Through in the reducing atmospheres such as nitrogen atmosphere this mixture being heat-treated, can obtain the Powdered Alloy Steel that the diffusion of molybdenum and Mo-contained alloy powder type is adhered to.
With above-mentioned foundation desirable embodiment of the present invention is enlightenment, and through above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.The technical scope of this invention is not limited to the content on the specification sheets, must confirm its technical scope according to the claim scope.
Claims (7)
1. alloy steel powder for powder metallurgy; It is characterized in that: comprise the manganese that contains below the 0.5 quality % in the said pre-alloyed powder; 0.2 the iron-based powder of the molybdenum of～1.5 quality %; Said iron-based powder surface attachment has the Alloy Steel Powder that contains molybdenum 0.05～1.0 quality %, is added with nickel powder or copper powder in the said Alloy Steel Powder.
2. a kind of alloy steel powder for powder metallurgy according to claim 1 is characterized in that: the said powdered alloy that contains molybdenum be by the compound that contains molybdenum with said iron-based powder blended state under reduction generate.
3. a kind of alloy steel powder for powder metallurgy according to claim 1 is characterized in that: nickel powder is that 0.2～5 quality % or copper powder are 0.2～3 quality % in the said Alloy Steel Powder.
4. a kind of alloy steel powder for powder metallurgy according to claim 3 is characterized in that: said nickel powder or copper powder are electrolytic nickel powder or electrolytic copper powder.
5. a kind of alloy steel powder for powder metallurgy according to claim 3 is characterized in that: the granularity of said nickel powder or copper powder is smaller or equal to 45 microns.
6. a kind of alloy steel powder for powder metallurgy according to claim 1 is characterized in that: be added with the polymer class tackiness agent in the said Powdered Alloy Steel.
7. a kind of alloy steel powder for powder metallurgy according to claim 1 is characterized in that: said polymer class tackiness agent is resol class, polyethylene kind or viton class tackiness agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105844963A CN102560234A (en) | 2010-12-13 | 2010-12-13 | Powdered alloy steel for powder metallurgy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105844963A CN102560234A (en) | 2010-12-13 | 2010-12-13 | Powdered alloy steel for powder metallurgy |
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| CN102560234A true CN102560234A (en) | 2012-07-11 |
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| CN2010105844963A Pending CN102560234A (en) | 2010-12-13 | 2010-12-13 | Powdered alloy steel for powder metallurgy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103741030A (en) * | 2013-12-16 | 2014-04-23 | 芜湖市天雄新材料科技有限公司 | High performance powder metallurgy gear |
| CN110267754A (en) * | 2017-02-02 | 2019-09-20 | 杰富意钢铁株式会社 | The manufacturing method of powder used in metallurgy mixed powder, sintered body and sintered body |
-
2010
- 2010-12-13 CN CN2010105844963A patent/CN102560234A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103741030A (en) * | 2013-12-16 | 2014-04-23 | 芜湖市天雄新材料科技有限公司 | High performance powder metallurgy gear |
| CN110267754A (en) * | 2017-02-02 | 2019-09-20 | 杰富意钢铁株式会社 | The manufacturing method of powder used in metallurgy mixed powder, sintered body and sintered body |
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Application publication date: 20120711 |