CN109680217B - Method for manufacturing nonmagnetic powder metallurgy part and application - Google Patents

Method for manufacturing nonmagnetic powder metallurgy part and application Download PDF

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CN109680217B
CN109680217B CN201811564945.0A CN201811564945A CN109680217B CN 109680217 B CN109680217 B CN 109680217B CN 201811564945 A CN201811564945 A CN 201811564945A CN 109680217 B CN109680217 B CN 109680217B
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powder
manufacturing
sintering
balance
metallurgy part
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CN109680217A (en
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包崇玺
李玉柱
冯伟立
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Mbtm New Materials Group Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • 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
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/1003—Use of special medium during sintering, e.g. sintering aid
    • B22F3/1007—Atmosphere
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C22C33/0207—Using a mixture of prealloyed powders or a master alloy
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
    • C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese

Abstract

The invention relates to a method for manufacturing a nonmagnetic powder metallurgy part, which comprises the following steps: mixing powder: 0.7-2% of C, 10-30% of Mn and 0.05-1.5% of P; forming; thirdly, sintering; and also relates to the application of the parts manufactured by the manufacturing method as the motor balance weight. Compared with the prior art, the invention has the advantages that: the parts mainly comprise iron, carbon, phosphorus and manganese, do not contain noble metal elements such as nickel, molybdenum, tungsten and the like, have low cost, and the sintered alloy has no magnetism and completely meets the use requirement of the motor balance block.

Description

Method for manufacturing nonmagnetic powder metallurgy part and application
Technical Field
The invention relates to the field of powder metallurgy part manufacturing, in particular to a manufacturing method and application of a nonmagnetic powder metallurgy part.
Background
The non-magnetic parts have wide application, and relate to the fields of electric power, rail transit, buildings, national defense and military industry and the like. The relative magnetic permeability mu of the non-magnetic part is slightly larger than 1, and the magnetization effect is very weak in a magnetic field, so that the non-magnetic part generates a phenomenon called as non-magnetic steel, so that the non-magnetic part is vividly called as non-magnetic steel. The non-magnetic steel is used as a functional steel material and basically does not produce magnetic induction under the action of a magnetic field.
The room temperature structure of the non-magnetic steel is required to be stable austenite, because ferrite, pearlite and martensite structures are ferromagnetic at normal temperature, a strong magnetization effect is shown in a magnetic field, the magnetic permeability is very high, austenite with a face-centered cubic structure is paramagnetic, the magnetic permeability is very low, and a stable single-phase austenite structure can be obtained at room temperature by properly adding alloy elements to expand an austenite region in a Fe-C alloy phase diagram and a heat treatment method, so that the magnetic permeability of the steel material is kept at a low level.
For steel, the nonmagnetic alloy is mainly austenitic stainless steel and Fe-Mn series nonmagnetic steel. The austenitic stainless steel mainly utilizes nickel to enlarge an austenitic region, and the Fe-Mn series non-magnetic steel mainly utilizes higher Mn and C contents to obtain an austenitic structure at room temperature, and mainly comprises Fe-Mn, Fe-Mn-Cr and Fe-Mn-Al series non-magnetic structural steel.
One use of non-magnetic parts is in the manufacture of balance weights for electrical machines. As for the balance weight of the motor, the dynamic balance of the high-speed running of the motor is maintained through the balance weight. A balance weight made of steel containing ferrite and martensite in a magnetic field of a motor is magnetized, causing unbalance of the motor, resulting in increased vibration and increased noise. Materials used for a balance weight of a general motor are zinc alloy, copper alloy, austenitic stainless steel, and the like. Because the density of the zinc alloy is lower, the volume of the balance block is too large, and the requirement of motor miniaturization cannot be met. Although the density of the copper alloy can meet the requirement, the copper alloy is expensive and has low cost performance. The density of the austenitic stainless steel meets the requirement, but the processing performance is poor, and the price is expensive.
Powder metallurgy is also used in the manufacture of non-magnetic parts as a machining process with little or no cutting. When the Fe-Mn-C alloy is manufactured by a powder metallurgy method, the density of the product is difficult to increase due to difficult sintering. In order to solve the problem, Chinese patent with publication number CN106544570B discloses a high-density non-magnetic balance block and a powder metallurgy preparation method and application thereof, and discloses a high-density non-magnetic steel balance block part and a preparation method thereof. But the price of the WC added in the patent, electrolytic copper and phosphor copper is expensive, the liquid phase proportion is high, the deformation of parts after sintering is large, and the precision is poor.
Disclosure of Invention
The present invention is directed to provide a method for manufacturing a nonmagnetic powder metallurgy part at low cost in view of the above-mentioned technical situation.
The invention also aims to provide an application of the part prepared by the manufacturing method of the nonmagnetic powder metallurgy part as a motor balance block.
The technical scheme adopted by the invention for solving the technical problems is as follows: the manufacturing method of the nonmagnetic powder metallurgy part is characterized by comprising the following steps of:
mixing powder, mixing raw material powder, and ensuring that the mass percentages of the components are respectively as follows: 0.7-2% of C, 10-30% of Mn, 0.05-1.5% of P, no more than 2% of unavoidable impurities, 0.3-1.0% of lubricant and the balance of iron;
forming;
and thirdly, sintering.
After the step (c) sintering, the step (c) machining may be performed or not performed as required: and machining the part which is difficult to form by the die.
The lubricant used in the invention is a powder lubricant, and any one of commonly used lubricants in the prior art such as stearate, polyamide wax, polyacrylamide wax and the like can be selected.
The forming of the invention can select any one of the common forming processes in the prior art such as compression molding, warm mold pressing, warm press forming and the like.
In order to make the component distribution more uniform, a preferable scheme is that the raw material powder in the mixed powder in the step (i) is mixed by mixing Fe-Mn-C pre-alloy powder, graphite powder, ferrophosphorus powder and a lubricant.
Preferably, the Fe-Mn-C pre-alloy powder mixed in the first step comprises the following components in percentage by mass: mn: 10-30%, C: 0 to 2% (excluding 0), and unavoidable other impurities: less than or equal to 2 percent, and the balance of Fe.
In order to simplify the preparation and reduce the cost, the Fe-Mn-C prealloying powder in the steps is prepared by adopting an atomization process of taking iron powder, manganese powder and graphite powder which are commonly used in the prior art as raw materials, or can be prepared by adopting mixed powder of pure iron powder and ferromanganese alloy powder as raw material powder and adopting the atomization process, or adopting pure iron powder and mixed powder of pure manganese powder and graphite powder as raw material powder and adopting the atomization process.
Preferably, the ferrophosphorus powder is Fe3And (3) P powder. Selecting Fe with 15.6% of phosphorus content3The P powder can further lower the sintering temperature. Of all ferrophosphorus compounds, Fe3The lowest melting point of P is more beneficial to reducing the sintering temperature of the Fe-Mn-C pre-alloy powder.
In order to further evenly distribute the P, the raw material powder in the mixed powder in the step I is mixed by mixing Fe-Mn-P-C pre-alloy powder, graphite powder and a lubricant.
Preferably, the Fe-Mn-P-C pre-alloy powder comprises the following components in percentage by weight: 0 to 2% of C (excluding 0), 10 to 30% of Mn, 0.05 to 1.5% of P, and not more than 2% of unavoidable impurities.
In order to simplify the preparation and reduce the cost, the Fe-Mn-P-C pre-alloy powder is prepared by using ferromanganese, pure iron, graphite powder and ferrophosphorus as raw materials through a common atomization process in the prior art.
Preferably, the green density obtained by shaping in step (II) is more than 6.0g/cm3。
Preferably, the sintering temperature of the sintering in the third step is 1050-1350 ℃, the sintering time is 5-200 minutes, and the sintering atmosphere is a non-oxidizing atmosphere; the non-oxidizing atmosphere is preferably vacuum or a mixture of hydrogen and nitrogen containing 5-30% of hydrogen.
As an improvement, in the first step, 1-10% by mass of Cu is added, preferably in the form of electrolytic copper powder. The addition of Cu can further increase the density.
The invention also relates to an application of the part prepared by the manufacturing method of the nonmagnetic powder metallurgy part as a motor balance block.
Compared with the prior art, the invention has the advantages that: the invention only contains four metal elements of iron, carbon, phosphorus and manganese, does not contain precious metal elements of nickel, molybdenum, tungsten and the like, has low cost, and the sintered alloy has no magnetism, less pores and good density, and completely meets the use requirements in the fields of motor balance blocks and the like.
Drawings
FIG. 1 is a metallographic structure photograph of example 1;
FIG. 2 is a photograph of the pores of example 1;
FIG. 3 is a metallographic structure photograph of example 2;
FIG. 4 is a photograph of the pores of example 2;
FIG. 5 is a metallographic structure photograph of example 3;
FIG. 6 is a photograph of the pores of example 3.
Detailed Description
The invention is described in further detail below with reference to the figures and examples.
In the following embodiments, the step (c) may be performed or not performed after the step (c) is sintered, as required: and machining the part which is difficult to form by the die.
The lubricant used in the following examples is a powder lubricant, and any one of conventional lubricants in the art such as stearate, polyamide wax, and polyacrylamide wax may be selected.
The forming in the following embodiments may be any one of the forming processes commonly used in the prior art, such as compression molding, warm mold pressing, warm press forming, and the like.
Example 1:
mixing powder, namely mixing Fe-Mn-C pre-alloy powder, graphite powder, ferrophosphorus powder and a lubricant, and ensuring that the percentage contents of the components are respectively as follows: 1.5% of C, 17.3% of Mn, 0.3% of P, inevitable impurities not exceeding 2%, 0.7% of powder lubricant and the balance of iron; the Fe-Mn-C prealloy used in the embodiment comprises the following components in percentage by mass: mn: 20%, C: 1%, other inevitable impurities: less than or equal to 2 percent, and the balance of Fe. The ferrophosphorus powder used in this example was Fe with a phosphorus content of 15.6%3And (3) P powder.
② molding, the density after molding is 6.2g/cm3；
And thirdly, sintering at 1200 ℃ for 30 minutes in vacuum.
Density after sintering 7.38g/cm3The sintered structure is austenite and partial oxide, has no magnetism, and completely meets the use requirements in the fields of motor balance blocks and the like. The metallographic structure is shown in figure 1, and the pores are shown in figure 2, so that the compactness is good and the pores are few. The carbon content after sintering is 1.1 percent, and the manganese content is 17.2 percent.
Example 2:
mixing Fe-Mn-C, graphite powder and ferro-phosphorus powderAnd a lubricant, and the percentage contents of the components are respectively ensured as follows: 1.2% of C, 25% of Mn, 0.5% of P, unavoidable impurities not exceeding 2%, 0.8% of powder lubricant and the balance of iron. The Fe-Mn-C prealloy used in the embodiment comprises the following components in percentage by mass: mn: 30%, C: 0.8%, other inevitable impurities: less than or equal to 2 percent, and the balance of Fe. The ferrophosphorus powder used in this example was Fe with a phosphorus content of 15.6%3And (3) P powder.
② molding, the density after molding is 6.0g/cm 3.
And thirdly, sintering at 1230 ℃ for 20 minutes in an atmosphere of a mixed gas containing 10% of hydrogen, nitrogen and hydrogen.
Density after sintering 7.31g/cm3The sintered structure is austenite and partial oxide, has no magnetism, and completely meets the use requirements in the fields of motor balance blocks and the like. The metallographic structure is shown in figure 3, and the pores are shown in figure 4, so that the compactness is good and the pores are few.
Example 3:
firstly, mixing powder, namely mixing Fe-Mn-C, graphite powder, ferrophosphorus powder and a lubricant, and ensuring that the percentage contents of the components are respectively as follows: 2.0% of C, 20% of Mn, 0.8% of P, unavoidable impurities not exceeding 2%, 0.7% of powder lubricant and the balance of iron. The Fe-Mn-C prealloy used in the embodiment comprises the following components in percentage by mass: mn: 25%, C: 2%, other inevitable impurities: less than or equal to 2 percent, and the balance of Fe. The ferrophosphorus powder used in this example was Fe with a phosphorus content of 15.6%3And (3) P powder.
Molding, wherein the density of the molded product is 6.1g/cm 3;
and thirdly, sintering at 1230 ℃ for 30 minutes in vacuum.
Density after sintering 7.35g/cm3The sintered structure is austenite and partial oxide, has no magnetism, and completely meets the use requirements in the fields of motor balance blocks and the like. The metallographic structure is shown in figure 5, and the pores are shown in figure 6, so that the compactness is good and the pores are few.
Example 4:
mixing powder, namely mixing Fe-Mn-C, graphite powder, ferrophosphorus powder and a lubricant, and ensuring the percentage of each componentThe contents are respectively as follows: 2.0% of C, 20% of Mn, 0.8% of P, no more than 2% of unavoidable impurities, 1% of powder lubricant and the balance of iron. The Fe-Mn-C prealloy used in the embodiment comprises the following components in percentage by mass: mn: 25%, C: 1%, other inevitable impurities: less than or equal to 2 percent, and the balance of Fe. The ferrophosphorus powder used in this example was Fe with a phosphorus content of 15.6%3And (3) P powder.
Molding, wherein the density of the molded product is 6.5g/cm 3;
and thirdly, sintering at 1270 ℃ for 25 minutes in vacuum.
Density after sintering 7.30g/cm3. The sintered magnet is non-magnetic, and completely meets the use requirements in the fields of motor balance blocks and the like; the density is good, and the hole is less.
Example 5:
firstly, mixing powder, namely mixing Fe-Mn-C, graphite powder, ferrophosphorus powder and a lubricant, and ensuring that the percentage contents of the components are respectively as follows: 0.9% of C, 20% of Mn, 0.1% of P, unavoidable impurities not exceeding 2%, 0.7% of powder lubricant and the balance of iron. The Fe-Mn-C prealloy used in the embodiment comprises the following components in percentage by mass: mn: 23%, C: 0.5%, other unavoidable impurities: less than or equal to 2 percent, and the balance of Fe. The ferrophosphorus powder used in this example was Fe with a phosphorus content of 15.6%3And (3) P powder.
② molding, the density after molding is 6.4g/cm3；
And thirdly, sintering at 1250 ℃ for 100 minutes in vacuum.
Density after sintering 7.35g/cm3. The sintered magnet is non-magnetic, and completely meets the use requirements in the fields of motor balance blocks and the like; the density is good, and the hole is less.
Example 6:
mixing powder, namely mixing Fe-Mn-C, graphite powder, ferrophosphorus powder, electrolytic copper and a lubricant, and ensuring that the percentage contents of the components are respectively as follows: 0.9% of C, 20% of Mn, 0.3% of P, 3% of copper, not more than 2% of unavoidable impurities, 0.7% of powder lubricant and the balance of iron. The weight percentages of the components in the Fe-Mn-C prealloy used in this example are respectivelyComprises the following steps: mn: 23%, C: 0.5%, other unavoidable impurities: less than or equal to 2 percent, and the balance of Fe. The ferrophosphorus powder used in this example was Fe with a phosphorus content of 15.6%3And (3) P powder.
② molding, the density after molding is 6.3g/cm3；
And thirdly, sintering at 1210 ℃ for 25 minutes in the atmosphere of mixed gas containing 10% of hydrogen, nitrogen and hydrogen.
Density after sintering 7.42g/cm3. The sintered magnet is non-magnetic, and completely meets the use requirements in the fields of motor balance blocks and the like; the density is good, and the hole is less.
Example 7:
mixing powder, namely mixing Fe-Mn-C, graphite powder, ferrophosphorus powder, electrolytic copper and a lubricant, and ensuring that the percentage contents of the components are respectively as follows: 1.4% of C, 18% of Mn, 0.7% of P, 5% of copper, not more than 2% of unavoidable impurities, 0.7% of powder lubricant and the balance of iron. The ferrophosphorus powder used in this example was Fe with a phosphorus content of 15.6%3And (3) P powder. The Fe-Mn-C prealloy used in the embodiment comprises the following components in percentage by mass: mn: 21%, C: 1.2%, other unavoidable impurities: less than or equal to 2 percent, and the balance of Fe.
② molding, the density after molding is 6.3g/cm3；
And thirdly, sintering at 1200 ℃ for 100 minutes in vacuum.
The density after sintering is 7.48g/cm 3. The sintered magnet is non-magnetic, and completely meets the use requirements in the fields of motor balance blocks and the like; the density is good, and the hole is less.
Example 8:
mixing powder, namely mixing Fe powder, graphite powder, ferrophosphorus powder, manganese and a lubricant, and ensuring that the percentage contents of the components are respectively as follows: 0.7% of C, 10% of Mn, 0.05% of P, unavoidable impurities not exceeding 2%, 0.7% of powder lubricant and the balance of iron. The ferrophosphorus powder used in this example was Fe with a phosphorus content of 15.6%3And (3) P powder. The Fe-Mn-C prealloy used in the embodiment comprises the following components in percentage by mass: mn: 10%, C: 0.3%, other inevitable impurities: less than or equal to 2 percent, and the balance of Fe.
② molding, the density after molding is 7g/cm3；
And thirdly, sintering at 1290 ℃ for 5 minutes in vacuum.
Density after sintering 7.23g/cm3. The sintered magnet is non-magnetic, and completely meets the use requirements in the fields of motor balance blocks and the like; the density is good, and the hole is less.
Example 9:
mixing powder, namely mixing Fe powder, graphite powder, ferrophosphorus powder, manganese powder and a lubricant, and ensuring that the percentage contents of the components are respectively as follows: 2.0% of C, 30% of Mn, 1.5% of P, no more than 2% of unavoidable impurities, 1% of powder lubricant and the balance of iron. The ferrophosphorus powder used in this example was Fe with a phosphorus content of 15.6%3And (3) P powder. The Fe-Mn-C prealloy used in the embodiment comprises the following components in percentage by mass: mn: 30%, C: 2%, other inevitable impurities: less than or equal to 2 percent, and the balance of Fe.
② molding, the density after molding is 6.8g/cm3；
And thirdly, sintering at 1350 ℃ for 200 minutes in vacuum.
Density after sintering 7.23g/cm3. The sintered magnet is non-magnetic, and completely meets the use requirements in the fields of motor balance blocks and the like; the density is good, and the hole is less.
Example 10:
mixing powder, namely mixing Fe-Mn-C, graphite powder, ferrophosphorus powder, electrolytic copper powder and a lubricant, and ensuring that the percentage contents of the components are respectively as follows: 1.4% of C, 18% of Mn, 0.7% of P, 10% of copper, not more than 2% of unavoidable impurities, 0.7% of powder lubricant and the balance of iron. The ferrophosphorus powder used in this example was Fe with a phosphorus content of 15.6%3And (3) P powder. The Fe-Mn-C prealloy used in the embodiment comprises the following components in percentage by mass: mn: 21%, C: 1.2%, other unavoidable impurities: less than or equal to 2 percent, and the balance of Fe.
② molding, the density after molding is 7.2g/cm3；
And thirdly, sintering at 1200 ℃ for 100 minutes in vacuum.
Density after sintering 7.50g/cm3. The sintered magnet is non-magnetic, and completely meets the use requirements in the fields of motor balance blocks and the like; the density is good, and the hole is less.
Example 11:
mixing powder, namely mixing Fe-Mn-C-P alloy powder with graphite and a lubricant, and ensuring that the percentage contents of the components are respectively as follows: 1.49% of C, 15.8% of Mn, 0.5% of P, no more than 2% of unavoidable impurities, 1% of powder lubricant and the balance of iron. The Fe-Mn-C-P prealloy used in the embodiment comprises the following components in percentage by mass: mn: 16%, C: 1.5%, P: 0.5%, other unavoidable impurities: less than or equal to 2 percent, and the balance of Fe.
② molding, the density after molding is 6.1g/cm3；
And thirdly, sintering at 1250 ℃ for 50 minutes in vacuum.
Density after sintering 7.25g/cm3. The sintered magnet is non-magnetic, and completely meets the use requirements in the fields of motor balance blocks and the like; the density is good, and the hole is less.

Claims (9)

1. A method for manufacturing a nonmagnetic powder metallurgy part is characterized by comprising the following steps:
mixing powder, mixing raw material powder, and ensuring that the mass percentages of the components are respectively as follows: 0.7-2% of C, 10-30% of Mn, 0.05-1.5% of P, no more than 2% of unavoidable impurities, 0.3-1.0% of lubricant and the balance of iron;
② shaping, the density of the green compact obtained by the shaping of the step (II) is more than or equal to 6.0g/cm3；
And thirdly, sintering.
2. The method of manufacturing a nonmagnetic powder metallurgy part according to claim 1, wherein: in the first step, the raw material powder in the mixed powder is mixed by mixing Fe-Mn-C pre-alloy powder, graphite powder, ferrophosphorus powder and a lubricant.
3. The method of manufacturing a nonmagnetic powder metallurgy part according to claim 2, wherein: the Fe-Mn-C pre-alloyed powder mixed in the step I comprises the following components in percentage by mass: mn: 10-30%, C: c is more than 0 and less than or equal to 2 percent, and other inevitable impurities: less than or equal to 2 percent, and the balance of Fe.
4. The method of manufacturing a nonmagnetic powder metallurgy part according to claim 2 or 3, wherein: the ferrophosphorus powder is Fe3And (3) P powder.
5. The method of manufacturing a nonmagnetic powder metallurgy part according to claim 1, wherein: in the step I, the raw material powder is mixed by mixing Fe-Mn-P-C pre-alloy powder, graphite powder and a lubricant.
6. The method of manufacturing a nonmagnetic powder metallurgy part according to claim 5, wherein: the Fe-Mn-P-C pre-alloy powder comprises the following components in percentage by weight: c is more than 0 and less than or equal to 2 percent, Mn is 10-30 percent, P is 0.05-1.5 percent, and unavoidable impurities are not more than 2 percent.
7. The method of manufacturing a nonmagnetic powder metallurgy part according to claim 1, wherein: and the sintering temperature of the sintering is 1050-1350 ℃, the sintering time is 5-200 minutes, and the sintering atmosphere is non-oxidizing atmosphere.
8. The method of manufacturing a nonmagnetic powder metallurgy part according to claim 1, wherein: the powder mixing method comprises the following step (1) and the components of the mixed powder also comprise 1-10% of Cu by mass.
9. Use of a part obtained by the method for manufacturing a nonmagnetic powder metallurgy part according to any one of claims 1 to 8 as a motor weight.
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CN103695794B (en) * 2013-12-24 2015-09-30 舒思雄 A kind of compressor counterbalance weight and manufacture method thereof
CN103691955B (en) * 2013-12-31 2015-10-28 舒思雄 The balance weight that a kind of manufacture method of compressor balance weight and employing the method are produced
CN104889403B (en) * 2015-06-05 2018-06-05 东睦新材料集团股份有限公司 A kind of preparation method of iron-based powder metallurgy parts
CN106544570B (en) * 2016-10-28 2018-02-27 华南理工大学 A kind of high density nonmagnetic steel balance weight part and preparation method thereof

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