CN107034420B - Nonmagnetic steel product and its manufacturing method - Google Patents
Nonmagnetic steel product and its manufacturing method Download PDFInfo
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- CN107034420B CN107034420B CN201710475061.7A CN201710475061A CN107034420B CN 107034420 B CN107034420 B CN 107034420B CN 201710475061 A CN201710475061 A CN 201710475061A CN 107034420 B CN107034420 B CN 107034420B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 51
- 239000010959 steel Substances 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 239000000843 powder Substances 0.000 claims abstract description 70
- 229910002551 Fe-Mn Inorganic materials 0.000 claims abstract description 34
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000012190 activator Substances 0.000 claims abstract description 20
- 238000005245 sintering Methods 0.000 claims abstract description 16
- 239000010439 graphite Substances 0.000 claims abstract description 15
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 15
- 238000000748 compression moulding Methods 0.000 claims abstract description 6
- 239000011230 binding agent Substances 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 20
- 239000004615 ingredient Substances 0.000 claims description 16
- 229910052698 phosphorus Inorganic materials 0.000 claims description 15
- 229910052745 lead Inorganic materials 0.000 claims description 14
- 229910052718 tin Inorganic materials 0.000 claims description 14
- 229910052717 sulfur Inorganic materials 0.000 claims description 11
- 229910000926 A-3 tool steel Inorganic materials 0.000 claims description 4
- 229910000616 Ferromanganese Inorganic materials 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims description 3
- 238000009692 water atomization Methods 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 4
- 239000011572 manganese Substances 0.000 description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 238000000034 method Methods 0.000 description 8
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 7
- 239000011812 mixed powder Substances 0.000 description 7
- 229910052748 manganese Inorganic materials 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 239000012188 paraffin wax Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 239000001993 wax Substances 0.000 description 5
- 239000010949 copper Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004663 powder metallurgy Methods 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 229910017112 Fe—C Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910000905 alloy phase Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005307 ferromagnetism Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000012255 powdered metal Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention relates to a kind of nonmagnetic steel product and its manufacturing methods.The manufacturing method of the nonmagnetic steel product includes the following steps：It is prepared by green compact：Fe-Mn prealloy powder is taken, 2~4% activators and 0.3~0.6% graphite is added, adds the binder of the Fe-Mn prealloy powder, activator, graphite total weight 0.5~1.2%, compression moulding after mixing obtains green compact；The activator includes FeB master alloyed powders, wherein the weight percent of the B powder is 15~25%；Sintering：The green compact are sintered, the nonmagnetic steel product is obtained.The use for avoiding the higher raw material of the prices such as copper powder keeps the cost of manufacture of nonmagnetic steel product cheap, while obtaining the nonmagnetic steel product haveing excellent performance, and tensile strength can reach 500MP or more, and elongation is up to 6% or more.
Description
Technical field
The present invention relates to powder metallurgical technologies, more particularly to a kind of nonmagnetic steel product and its manufacturing method.
Background technology
The relative permeability μ values of nonmagnetic steel are slightly larger than 1, very weak for magnetization in magnetic field, do not generate magnetic induction substantially
Low magnetic steel iron material, therefore visually be referred to as nonmagnetic steel.The requirement of nonmagnetic steel room temperature texture is stable austenite, and iron is plain
Body, pearlite and martensitic structure are ferromagnetism at normal temperatures, and high manganese nonmagnetic steel is exactly to expand Fe-C by adding manganese element
Austenitic area in alloy phase diagram obtains stable single phase austenite tissue at ambient temperature.
Industrially, high manganese nonmagnetic steel product is obtained generally by casting, and processing hardening is apparent, for required precision height
If small part can with the method for powder metallurgy produce can preferably solve the problems, such as this.Manganese because with oxygen affinity is big, fusing point is high, easy
The shortcomings of volatilization more difficult carry out alloying, these drawbacks can be solved by being introduced in the form of prealloy, and can ensure material
It is magnetic constant.But there are prealloy itself have strong processing hardening characteristic, compressibility be poor, green strength is low, sintering is by force
Spend low deficiency.
It is existing to use high manganese prealloy powder with powder metallurgically manufacturing nonmagnetic steel technique, in order to improve the briquettability and burning of powder
Density is tied, mainly improves mouldability by the way that the good Cu powder of high-content compressibility is added, while utilizing the effect of its liquid-phase sintering,
Sintered density is improved to obtain high-density sintered no magnetic product.Since the price of copper is high, cause the cost of technique high,
It cannot be satisfied the demand of market high performance-price ratio.Although and aforementioned elements powder can obtain high-density sintered no magnetic product, nothing
The mechanical property of magnet steel is unsatisfactory.
Invention content
Based on this, it is necessary to which for providing, a kind of process is simple, cost-effective, excellent combination property powder metallurgy
The manufacturing method of nonmagnetic steel product.
A kind of manufacturing method of nonmagnetic steel product, includes the following steps：
It is prepared by green compact：Fe-Mn prealloy powder is taken, 2~4% activation of the Fe-Mn prealloy powder weight percent are added
Agent and 0.3~0.6% graphite add the bonding of the Fe-Mn prealloy powder, activator, graphite total weight 0.5~1.2%
Agent, compression moulding after mixing, obtains green compact；
The activator includes FeB master alloyed powders, in the FeB master alloyed powders weight percent of B be 15~
25%；
The Fe-Mn prealloy powder includes the ingredient of following weight percent：Mn 15~19%, C 0.6~1.2%, Si
0.7~1.0%, S≤0.05%, P≤0.09%, Pb≤0.2%, Sn≤0.2%, surplus Fe；
Sintering：The green compact are sintered, the nonmagnetic steel product is obtained.
The Fe-Mn prealloy powder includes the ingredient of following weight percent in one of the embodiments,：Mn 17~
19%, C 0.6~0.9%, Si 0.8~1.0%, S≤0.05%, P≤0.09%, Pb≤0.2%, Sn≤0.2%, surplus
For Fe.
The Fe-Mn prealloy powder is smelting mixed by A3 steel, mid-carbon fe-mn and high carbon ferromanganese in one of the embodiments,
After conjunction, it is prepared using water atomization.The A3 steel is a kind of mild steel, phosphorus content≤0.03%.
The binder is paraffin wax base wax powder in one of the embodiments,.
The nonmagnetic steel product includes the ingredient of following weight percent in one of the embodiments,：Mn 14.31~
18.56%, C 0.87~1.77%, Si 0.67~0.98%, B 0.1~1%, S≤0.08%, P≤0.09%, Pb≤
0.2%, Sn≤0.2%, surplus Fe.
The nonmagnetic steel product includes the ingredient of following weight percent in one of the embodiments,：Mn 16~
18.56%, C 1.1~1.4%, Si 0.7~0.98%, B 0.1~0.5%, S≤0.08%, P≤0.09%, Pb≤
0.2%, Sn≤0.2%, surplus Fe.
The size distribution of the Fe-Mn prealloy powder is 150~325 mesh in one of the embodiments,.
The density of the green compact is 5.8~6.2g/cm in one of the embodiments,3。
The temperature of the sintering is 1200 DEG C~1280 DEG C in one of the embodiments, 1.5~2h of time.
The present invention also provides the nonmagnetic steel products that the manufacturing method of the nonmagnetic steel product manufactures.
Compared with prior art, the invention has the advantages that：
In order to avoid the use of the higher cupric high density powder of cost, while in identical sintered article density 6.9-7.1g/
cm3It is lower to obtain the nonmagnetic steel product with higher force performance, the manufacturing method of nonmagnetic steel product of the invention：First, with not
The Fe-Mn prealloy mixed powders that copper is added are main powder, and adjust the ingredient of Fe-Mn prealloy powder, reduce Gao Meng as far as possible
Work-hardening capacity of the prealloy powder in pressing process；Secondly, graphite is added and binder realizes the lubrication of alloyed powder, not only
Effectively solve the problems, such as that the compressibility of prealloy Fe-Mn prealloy powder and formability are poor, and graphite powder is gone back in sintering process
Strengthen the metallurgical binding of high manganese prealloy powder；Coordinate FeB master alloyed powders as activator again, forms liquid at a sintering temperature
The activation mutually played.Gained alloy powder compressibility and good moldability as a result, can be pressed into using standard machinery press
Type, sintering nonmagnetic steel product size stabilization obtained, density 6.9-7.1g/cm3.Compared with prior art, copper is avoided
The use of the higher raw material of the prices such as powder, keeps the cost of manufacture of nonmagnetic steel product cheap, while significantly improving nonmagnetic steel product
Mechanical property, tensile strength can reach 500MP or more, and elongation is up to 6% or more.
Compared with prior art, not only nonmagnetic steel product properties is high for the manufacturing method of nonmagnetic steel product of the invention, but also
It is simple for process, at low cost, Product Precision is high, can be used for the occasion high to mechanical property requirements, substantially extend existing nonmagnetic steel system
The industrial applications range of product.
In addition, avoiding preparing the technology mode of powdered metal parts using the highdensity prealloy powder of cupric, also open up
The application of high manganese prealloy powder, has great importance to the popularization of powder metallurgical technique.
Specific implementation mode
The nonmagnetic steel product and its manufacturing method of the present invention are described in further detail below in conjunction with specific embodiment.
For the size distribution of the Fe-Mn prealloy powder used in the embodiment of the present invention for 150~325 mesh, preparation method is as follows：
According to required Fe-Mn prealloy powder ingredients, A3 steel is placed in intermediate frequency furnace after heating fusing according to a certain ratio, is added
Enter mid-carbon fe-mn and high carbon ferromanganese；After melting down, with ferrosilicon deoxidation, Fe-Mn prealloy powder is prepared using water atomization.
Paraffin wax base wax powder is purchased from Guangzhou Qing Fanxiang new materials Co., Ltd.
Activator FeB master alloyed powders are purchased from Changsha Tian Jiu metal materials Co., Ltd.
Graphite is the special aquadag of powder metallurgy.
Embodiment 1
A kind of manufacturing method of nonmagnetic steel product (balance weight) of the present embodiment, includes the following steps：
A) first, Fe-Mn prealloy powder is taken, and by the weight percent for accounting for Fe-Mn prealloy powder, 4% activator is added
Graphite with 0.3%, adds the paraffin wax base wax powder bonding of the Fe-Mn prealloy powder, activator, graphite total weight 1.2%
Agent is stirred evenly spare with mixed powder machine.
Wherein, the activator is FeB master alloyed powders, wherein the weight percent of the B powder is 20%；
Fe-Mn prealloy powder includes the ingredient of following weight percent：Mn 15%, C 1.2%, Si 0.7, S≤
0.05%, P≤0.09%, Pb≤0.2%, Sn≤0.2%, surplus Fe.
B) it send mixed mixed-powder to standard machinery press compression moulding, the green compact of balance weight is made, density domination exists
5.8g/cm3。
C) green compact of compacting are sintered in pushing away boat stove, sintering temperature is 1200 DEG C~1280 DEG C, sintering time
1.5h。
D) deburring processing is polished to sintered green compact, you can.
Gained balance weight includes the ingredient of following weight percent：Mn 14.35%, C 1.47%, Si 0.68%, B
0.8%, S≤0.05%, P≤0.09%, Pb≤0.2%, Sn≤0.2%, surplus Fe.
Embodiment 2
A kind of manufacturing method of nonmagnetic steel product (balance weight) of the present embodiment, includes the following steps：
A) first, Fe-Mn prealloy powder is taken, and by the weight percent for accounting for Fe-Mn prealloy powder, 3% activator is added
Graphite with 0.5%, adds the paraffin wax base wax powder bonding of the Fe-Mn prealloy powder, activator, graphite total weight 0.9%
Agent is stirred evenly spare with mixed powder machine.
Wherein, the activator is FeB master alloyed powders, wherein the weight percent of the B powder is 15%；
Fe-Mn prealloy powder includes the ingredient of following weight percent：Mn 17%, C 0.9%, Si 1.0, S≤
0.05%, P≤0.09%, Pb≤0.2%, Sn≤0.2%, surplus Fe.
B) it send mixed mixed-powder to standard machinery press compression moulding, the green compact of balance weight is made, density domination exists
6.0g/cm3。
C) green compact of compacting are sintered in pushing away boat stove, sintering temperature is 1200 DEG C~1280 DEG C, sintering time
2h。
D) deburring processing is polished to sintered green compact, you can.
Gained balance weight includes the ingredient of following weight percent：Mn 16.4%, C 1.37%, Si 0.965%, B
0.45%, S≤0.05%, P≤0.09%, Pb≤0.2%, Sn≤0.2%, surplus Fe.
Embodiment 3
A kind of manufacturing method of nonmagnetic steel product (balance weight) of the present embodiment, includes the following steps：
A) first, Fe-Mn prealloy powder is taken, and by the weight percent for accounting for Fe-Mn prealloy powder, 2% activator is added
Graphite with 0.6%, adds the paraffin wax base wax powder bonding of the Fe-Mn prealloy powder, activator, graphite total weight 0.5%
Agent is stirred evenly spare with mixed powder machine.
Wherein, the activator includes FeB master alloyed powders, wherein the weight percent of the B powder is 25%；
Fe-Mn prealloy powder includes the ingredient of following weight percent：Mn 19%, C 0.6%, Si 0.8, S≤
0.05%, P≤0.09%, Pb≤0.2%, Sn≤0.2%, surplus Fe.
B) it send mixed mixed-powder to standard machinery press compression moulding, the green compact of balance weight is made, density domination exists
6.2g/cm3。
C) green compact of compacting are sintered in pushing away boat stove, sintering temperature is 1200 DEG C~1280 DEG C, sintering time
1.5h。
D) deburring processing is polished to sintered green compact, you can, gained balance weight includes following weight percent
Ingredient：Mn 18.5%, C 1.18%, Si 0.78%, B 0.1%, S≤0.05%, P≤0.09%, Pb≤0.2%, Sn
≤ 0.2%, surplus Fe.
Comparative example 1
A kind of nonmagnetic steel product (balance weight) of this comparative example, raw material and manufacture with embodiment 1, difference lies in：It does not use
The activator.
Comparative example 2
A kind of nonmagnetic steel product (balance weight) of this comparative example, raw material and manufacture with embodiment 1, difference lies in：It does not use
The graphite.
The performance test results of embodiment 1-3 and comparative example 1-2 are as shown in table 1.
Table 1
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of manufacturing method of nonmagnetic steel product, which is characterized in that include the following steps：
It is prepared by green compact：It uses Fe-Mn prealloy powder for original washing powder, 2~4% activators and 0.3 of Fe-Mn prealloy powder weight is added
~0.6% graphite adds the binder of the Fe-Mn prealloy powder, activator, graphite total weight 0.5~1.2%, mixing
Compression moulding afterwards obtains green compact；
The activator includes FeB master alloyed powders, and the weight percent of B is 15~25% in the FeB master alloyed powders；
The Fe-Mn prealloy powder includes the ingredient of following weight percent：Mn 15~19%, C 0.6~1.2%, Si 0.7
~1.0%, S≤0.05%, P≤0.09%, Pb≤0.2%, Sn≤0.2%, surplus Fe；
Sintering：The green compact are sintered, the nonmagnetic steel product is obtained.
2. the manufacturing method of nonmagnetic steel product according to claim 1, which is characterized in that the Fe-Mn prealloy powder packet
Include the ingredient of following weight percent：Mn 17~19%, C 0.6~0.9%, Si 0.8~1.0%, S≤0.05%, P≤
0.09%, Pb≤0.2%, Sn≤0.2%, surplus Fe.
3. the manufacturing method of nonmagnetic steel product according to claim 1, which is characterized in that the Fe-Mn prealloy powder by
After A3 steel, mid-carbon fe-mn and the smelting mixing of high carbon ferromanganese, it is prepared using water atomization.
4. the manufacturing method of nonmagnetic steel product according to claim 1, which is characterized in that the binder is paraffinic base wax
Powder.
5. according to the manufacturing method of claim 1-4 any one of them nonmagnetic steel products, which is characterized in that the nonmagnetic steel system
Product include the ingredient of following weight percent：Mn 14.31~18.56%, C 0.87~1.77%, Si 0.67~0.98%, B
0.1~1%, S≤0.08%, P≤0.09%, Pb≤0.2%, Sn≤0.2%, surplus Fe.
6. the manufacturing method of nonmagnetic steel product according to claim 5, which is characterized in that the nonmagnetic steel product includes such as
The ingredient of lower weight percent：Mn 16~18.56%, C 1.1~1.4%, Si 0.7~0.98%, B 0.1~0.5%, S
≤ 0.08%, P≤0.09%, Pb≤0.2%, Sn≤0.2%, surplus Fe.
7. according to the manufacturing method of claim 1-4 any one of them nonmagnetic steel products, which is characterized in that the Fe-Mn is pre-
The size distribution of alloyed powder is 150~325 mesh.
8. according to the manufacturing method of claim 1-4 any one of them nonmagnetic steel products, which is characterized in that the green compact it is close
Degree is 5.8~6.2g/cm3。
9. according to the manufacturing method of claim 1-4 any one of them nonmagnetic steel products, which is characterized in that the temperature of the sintering
Degree is 1200 DEG C~1280 DEG C, 1.5~2h of time.
10. the nonmagnetic steel product that the manufacturing method of claim 1-9 any one of them nonmagnetic steel products manufactures.
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| CN111468711B (en) * | 2019-01-23 | 2022-02-15 | 广东粤海华金科技股份有限公司 | Composite activation sintered non-magnetic steel material and manufacturing method thereof |
| CN110468342B (en) * | 2019-09-10 | 2021-07-27 | 温岭市恒丰粉末冶金有限公司 | Nonmagnetic balance block processing technology |
| CN114015942B (en) * | 2021-11-04 | 2022-07-29 | 广东美芝制冷设备有限公司 | Nonmagnetic balance block, preparation method thereof and compressor |
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| CN106312059A (en) * | 2016-10-11 | 2017-01-11 | 广东粤海华金科技股份有限公司 | Powder metallurgy sintering method of non-magnetic steel structural component |
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