CN109457190A - A kind of WC particle enhancing Fe base powder metallurgy material and preparation method thereof - Google Patents

A kind of WC particle enhancing Fe base powder metallurgy material and preparation method thereof Download PDF

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Publication number
CN109457190A
CN109457190A CN201810674677.1A CN201810674677A CN109457190A CN 109457190 A CN109457190 A CN 109457190A CN 201810674677 A CN201810674677 A CN 201810674677A CN 109457190 A CN109457190 A CN 109457190A
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CN
China
Prior art keywords
time
minutes
basis
hole
powder
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CN201810674677.1A
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Chinese (zh)
Inventor
叶旋
涂华锦
钟燕辉
陈绍军
邱志文
秦岭
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HEYUAN PEAK METAL PRODUCTS Co Ltd
Heyuan Polytechnic
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HEYUAN PEAK METAL PRODUCTS Co Ltd
Heyuan Polytechnic
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Priority to CN201810674677.1A priority Critical patent/CN109457190A/en
Publication of CN109457190A publication Critical patent/CN109457190A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/16Ferrous alloys, e.g. steel alloys containing copper
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F1/00Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition
    • B22F1/0003Metallic powders per se; Mixtures of metallic powders; Metallic powders mixed with a lubricating or binding agent
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C33/00Making ferrous alloys
    • C22C33/02Making ferrous alloys by powder metallurgy
    • C22C33/0257Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
    • C22C33/0264Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements the maximum content of each alloying element not exceeding 5%
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/08Ferrous alloys, e.g. steel alloys containing nickel
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/12Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium

Abstract

The present invention relates to a kind of WC particle enhancing Fe base powder metallurgy materials and preparation method thereof.It is made of compounding, mixing, compacting, sintering step.Its distinguishing feature is, it is prepared using the component system of optimization design, on the basis material of Fe-Cu-Ni-Mo-C system, add the WC particle of 1wt%-2wt%, the hole of basis material can effectively be filled, reduce the porosity of material, the hardness of reinforcing material, improve the bending strength of material, the preparation-obtained part of preparation method of WC particle enhancing Fe base powder metallurgy material according to the present invention, the micro WC of addition can be achieved, the hardness and bending strength of material can effectively be promoted, and the technique used is suitable for industrialized mass production, cost is effectively reduced, and the performance of product is effectively promoted, with good economic efficiency and market prospects.

Description

A kind of WC particle enhancing Fe base powder metallurgy material and preparation method thereof
Technical field
The present invention relates to PM technique, specifically a kind of WC particle enhancing Fe base powder metallurgy material and its preparation side Method.
Background technique
Iron-base powder metallurgy material is a certain amount of alloying element powder to be added, through overmulling using iron powder as basic powder It closes, alloy obtained from compacting, sintering and subsequent processing, powder metallurgical technique is at low cost, yield is big, high-efficient, property Can be good the advantages that, compared to traditional machining, it is more suitable for large-scale serial production, application prospect is very wide. Product-use based on iron-base powder metallurgy material is extensive, mainly for the manufacture of all kinds of mechanical structure parts, bearing and wear-resisting material Material etc..Especially in automobile manufacture industry, Properties of Powder Metallurgy Iron-based Material be played an important role, and the components of preparation are general All over applied to engine, conveyer system, ABS system, igniter etc..But iron-based powder metallurgy parts are in automobile manufacture at present In application be fully developed not yet, with automobile yield be continuously increased and powdered metal parts are on single vehicle Dosage increase, will be increasing for the demand of sintered metal product.In addition, high performance iron-based powder metallurgy parts Also mechanical driving device, engine and other universal machine products, the development in machinery manufacturing industry are had been widely used for Prospect is boundless.
The dosage of external every car powdered metallurgical material alreadys exceed 12 kilograms.Certain parts use powdered metallurgical material After may be implemented with iron replace copper, with iron replace steel, reduce product cost.For example, bushing, speed reducer housing etc. on automobile Part is originally bronze material, and after being changed to Properties of Powder Metallurgy Iron-based Material, each part saves 2-3 kilograms of copper, and cost reduces nearly ten Times, and its heat resistance, compression strength, wearability improve a lot.It replaces passing with sinter powder metal material in automobile industry The alloy cast iron of system is inexorable trend.
With the fast development of modern industry, high temperature resistant and wear-resisting property to steel material and structural member etc. are proposed more Carry out higher requirement.WC hard particles enhancing steel-based composite material has high-intensitive, the good plasticity and WC of steel material concurrently Enhance high rigidity, the high-wearing feature of particle, and WC enhancing particle usually has excellent high temperature resistance so that improving phase Answer the high temperature resistance of composite material.WC hard particles enhance steel-based composite material compared with basis material with more excellent comprehensive Close mechanical property.
Currently, the existing patent (application number of the WC particle enhancing powder metallurgy sintered material of Fe-Cu-Ni-Mo-C system CN201110008273.7 a kind of iron-base powder metallurgy material and preparation method thereof of tungsten carbide particle enhancing) is disclosed, is added Add more WC particle (10 wt %-15 wt %), prepared using discharge plasma sintering process, there is a problem of more, packet It including, the additive amount of WC is high, and it is expensive due to WC, cause the cost of product excessively high;Discharge plasma sintering process equipment is high Expensive, product preparation is limited, also significantly promotes the cost of product, is unfavorable for playing powder metallurgical technique cost advantage.
Summary of the invention
It is an object of the invention to be prepared existing for Fe-Cu-Ni-Mo-C powdered metallurgical material in the prior art to overcome Deficiency, the material system of optimization design WC particle enhancing Fe-Cu-Ni-Mo-C composite powder metallurgy material, provides a kind of letter It is single, practical, effectively prepare WC particle enhancing Fe base powder metallurgy material preparation method, effectively promoted material hardness and The comprehensive mechanical properties such as wear-resisting property.
The technical proposal for solving the technical problem of the invention is as follows:
A kind of preparation method of WC particle enhancing Fe base powder metallurgy material, uses iron powder, copper powder, nickel powder, molybdenum powder and carbon for original Material, including mixed powder, compacting, sintering, it is characterised in that addition hard particles WC.
The preparation method of the WC particle enhancing Fe base powder metallurgy material comprises the concrete steps that:
1. ingredient: by mass percentage, with copper powder 1.3wt%, nickel powder 1.5wt%, molybdenum powder 0.5wt%, carbon dust 2wt%, surplus is Iron prepares basis material;Ingredient is carried out with basis material 98wt%-99wt%, 1 wt %-2 wt % of tungsten carbide again.
2. mixing: being carried out in small-sized V-type batch mixer, mixing time is 90 minutes, and basis material is 98wt%-99 wt %, 1 wt %-2 wt % of tungsten carbide.
3. compacting: suppressing green compact, pressure 700MPa using hydraulic press.
4. sintering: being sintered using net strip sintering furnace, sintering atmosphere is to decompose ammonia, and temperature and time is shown in Table 1.
1 sintering process of table
Sintering stage Temperature/DEG C Time/min
1 865 18
2 975 18
3 1110 18
4 1120 18
5 1115 18
6 Cooling section 90
After green compact is sintered in sintering furnace, powdered metal parts are converted into metal bonding by mechanical snap.Sintering is powder metallurgy One of most basic process, the physical and mechanical properties final to powdered metal parts play conclusive effect.Sintered Cheng Zhong, also occurs the alloying action between each ingredient in addition to the metallurgical bonding between powder particle occurs, and iron powder green compact passes through Its intensity and elongation are significantly increased after sintering.
The preparation method of WC particle enhancing Fe base powder metallurgy material according to the present invention, in Fe-Cu-Ni-Mo-C system On basis material, the WC particle of 1 wt %-2 wt % is added, the hole of basis material can be effectively filled, reduce the hole of material Gap rate, the hardness of reinforcing material improve the bending strength of material.
Manufactured WC particle enhances Fe base powder metallurgy material according to the present invention, using conventional sintering method, in base The WC particle of 1 wt %-2 wt % is added on body material, having reduces material hole, improves the excellent of material hardness and bending strength Point, from the hole figure of the material of different WC particle additive amounts and performance comparison as shown in table 2 and Fig. 1-11.It can obviously see It arrives, hardness and the bending strength for adding the material of the WC of 1 wt %-2 wt % are all higher, are not added with WC and add the material of excessive WC Material, declines material property instead, from distribution of pores figure, it can be seen that the material of the WC of 1 wt %-2 wt % of addition Hole is less, and WC particle can realize the preferable filling to gap between Fe based powders, and then reduce porosity, is connected to other reinforcings Effect effectively promotes material hardness and bending strength, and the hole for adding the material of excessive WC is larger and there are WC reunions The case where, increase with the carbide cenotype " bridge joint " of precipitation to probability together, the effect isolated is caused to Fe matrix, it is right The performance of material is unfavorable.
The performance comparison of the material of 2 difference WC additive amount of table
Serial number WC additive amount (wt%) Hardness (HRB) Bending strength (MPa)
1 0 88.9 875.5787
2 1 100.4 932.7664
3 2 101.6 945.0644
4 3 96.9 884.6401
5 4 98.2 884.575
6 5 98.6 895.7192
7 6 98.4 876.6872
8 7 99.3 826.1722
9 8 90.4 769.9287
10 9 88 686.9852
11 10 73.5 654.1094
Advantages of the present invention:
1. the hole for adding the material of the WC of 1 wt %-2 wt % is effectively filled, porosity than the product for being not added with WC It reduces, density improves, and is connected to other strengthening effects, effectively promotes material hardness and bending strength.
2. the product of excessive WC than adding, the hole for adding the material of the WC of 1 wt %-2 wt % is smaller, and adds The case where hole of the material of more WC is larger and there are WC reunions, it is general to together with the carbide cenotype " bridge joint " of precipitation Rate increases, and the effect isolated is caused to Fe matrix, unfavorable to the performance of material.
The preparation-obtained part of preparation method of WC particle enhancing Fe base powder metallurgy material according to the present invention, can be real Micro WC is now added, can effectively promote the hardness and bending strength of material, and the technique used is suitable for industrialized Produce in enormous quantities, cost is effectively reduced, and the performance of product is effectively promoted, it is with good economic efficiency and Market prospects.
Detailed description of the invention
Fig. 1 is 100 times of hole figure of the material of 0wt%WC additive amount.
Fig. 2 is 200 times of hole figure of the material of 0wt%WC additive amount.
Fig. 3 is 100 times of hole figure of the material of 1wt%WC additive amount.
Fig. 4 is 200 times of hole figure of the material of 1wt%WC additive amount.
Fig. 5 is 100 times of hole figure of the material of 2wt%WC additive amount.
Fig. 6 is 200 times of hole figure of the material of 2wt%WC additive amount.
Fig. 7 is 100 times of hole figure of the material of 3wt%WC additive amount.
Fig. 8 is 200 times of hole figure of the material of 3wt%WC additive amount.
Fig. 9 is 100 times of hole figure of the material of 4wt%WC additive amount.
Figure 10 is 200 times of hole figure of the material of 4wt%WC additive amount.
Figure 11 is 100 times of hole figure of the material of 5wt%WC additive amount.
Figure 12 is 200 times of hole figure of the material of 5wt%WC additive amount.
Figure 13 is 100 times of hole figure of the material of 6wt%WC additive amount.
Figure 14 is 200 times of hole figure of the material of 6wt%WC additive amount.
Figure 15 is 100 times of hole figure of the material of 7wt%WC additive amount.
Figure 16 is 200 times of hole figure of the material of 7wt%WC additive amount.
Figure 17 is 100 times of hole figure of the material of 8wt%WC additive amount.
Figure 18 is 200 times of hole figure of the material of 8wt%WC additive amount.
Figure 19 is 100 times of hole figure of the material of 9wt%WC additive amount.
Figure 20 is 200 times of hole figure of the material of 9wt%WC additive amount.
Figure 21 is 100 times of hole figure of the material of 10wt%WC additive amount.
Figure 22 is 200 times of hole figure of the material of 10wt%WC additive amount.
Figure 23 is the metallographic structure figure of the material of 1wt%WC additive amount.
Figure 24 is the metallographic structure figure of the material of 2wt%WC additive amount.
Specific embodiment
Embodiment 1
Water-atomized iron powder is selected, and alloying element and auxiliary material progress ingredient are added in the following proportions: by mass percentage, with copper Powder 1.3wt%, nickel powder 1.5wt%, molybdenum powder 0.5wt%, carbon dust 2wt%, surplus are iron, prepare basis material;Again with basis material 99wt%, 1 wt % of tungsten carbide carry out ingredient;All raw materials loading V-type batch mixer is mixed, in small-sized V-type batch mixer It carries out, mixing time is 90 minutes, and basis material is 99 wt %, 1 wt % of tungsten carbide;The raw material mixed is packed into mold In, using hydraulic press compression moulding, pressing pressure 600MPa obtains green compact;It is sintered, is sintered using net strip sintering furnace Atmosphere is to decompose ammonia, and temperature and time is shown in Table 3, hardness 100.4HRB, bending strength 932.7664MPa, hole figure Fig. 3, Fig. 4 and Figure 23 are seen with metallographic structure figure.
3 sintering process of table
Sintering stage Temperature/DEG C Time/min
1 865 18
2 975 18
3 1110 18
4 1120 18
5 1115 18
6 Cooling section 90
Embodiment 2
Water-atomized iron powder is selected, and alloying element and auxiliary material progress ingredient are added in the following proportions: by mass percentage, with copper Powder 1.3wt%, nickel powder 1.5wt%, molybdenum powder 0.5wt%, carbon dust 2wt%, surplus are iron, prepare basis material;Again with basis material 98wt%, 2 wt % of tungsten carbide carry out ingredient;All raw materials loading V-type batch mixer is mixed, in small-sized V-type batch mixer It carries out, mixing time is 90 minutes, and basis material is 98 wt %, 2 wt % of tungsten carbide;The raw material mixed is packed into mold In, using hydraulic press compression moulding, pressing pressure 600MPa obtains green compact;It is sintered, is sintered using net strip sintering furnace Atmosphere is to decompose ammonia, and temperature and time is shown in Table 3, hardness 101.6HRB, bending strength 945.0644MPa, hole Figure is shown in Fig. 5, Fig. 6 and Figure 24 with metallographic structure figure.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention Protect range.

Claims (1)

1. a kind of WC particle enhancing Fe base powder metallurgy material and preparation method thereof, it is characterised in that comprise the concrete steps that:
(1) ingredient: by mass percentage, with copper powder 1.3wt%, nickel powder 1.5wt%, molybdenum powder 0.5wt%, carbon dust 2wt%, surplus is Iron prepares basis material;Ingredient is carried out with basis material 98wt%-99wt%, 1 wt %-2 wt % of tungsten carbide again;
(2) mixing: carrying out in small-sized V-type batch mixer, and mixing time is 90 minutes, and basis material is 98wt%-99 wt %, carbon Change 1 wt %-2 wt % of tungsten;
(3) it suppresses: green compact, pressure 700MPa is suppressed using hydraulic press;
(4) it is sintered: being sintered using net strip sintering furnace, sintering atmosphere is to decompose ammonia;Sintering process is divided into 6 sections, first segment temperature Degree for 865 DEG C and the time is 18 minutes, second segment temperature is 975 DEG C and the time be 18 minutes, third section temperature be 1110 DEG C and Time is 18 minutes, the 4th section of temperature is 1120 DEG C and the time is 18 minutes, the 5th section of temperature is 1115 DEG C and the time is 18 points Clock, the 6th section be 90 minutes the cooling section time.
CN201810674677.1A 2018-06-27 2018-06-27 A kind of WC particle enhancing Fe base powder metallurgy material and preparation method thereof Pending CN109457190A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111961984A (en) * 2019-05-20 2020-11-20 海安县鹰球粉末冶金有限公司 Powder metallurgy oil-retaining bearing formula

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07332029A (en) * 1994-06-09 1995-12-19 Mitsubishi Materials Corp Internal combustion engine tappet member provided with tip material having high bonding strength
JPH0949403A (en) * 1995-08-08 1997-02-18 Mitsubishi Materials Corp Internal combustion engine tappet member with tip material having high joint strength
CN102071360A (en) * 2011-01-14 2011-05-25 华南理工大学 Tungsten carbide particle-enhanced iron-based powder metallurgy material and preparation method thereof
CN104745912A (en) * 2014-12-30 2015-07-01 桐城信邦电子有限公司 Preparation method of ferrum-based powder metallurgy material for valve retainer
CN106367661A (en) * 2016-09-20 2017-02-01 机械科学研究总院先进制造技术研究中心 Preparation method for particle-reinforced iron-based surface composite material
CN108103387A (en) * 2016-11-24 2018-06-01 刘芳 A kind of nanometer of WC particle enhances high chromium iron-base powder metallurgy material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07332029A (en) * 1994-06-09 1995-12-19 Mitsubishi Materials Corp Internal combustion engine tappet member provided with tip material having high bonding strength
JPH0949403A (en) * 1995-08-08 1997-02-18 Mitsubishi Materials Corp Internal combustion engine tappet member with tip material having high joint strength
CN102071360A (en) * 2011-01-14 2011-05-25 华南理工大学 Tungsten carbide particle-enhanced iron-based powder metallurgy material and preparation method thereof
CN104745912A (en) * 2014-12-30 2015-07-01 桐城信邦电子有限公司 Preparation method of ferrum-based powder metallurgy material for valve retainer
CN106367661A (en) * 2016-09-20 2017-02-01 机械科学研究总院先进制造技术研究中心 Preparation method for particle-reinforced iron-based surface composite material
CN108103387A (en) * 2016-11-24 2018-06-01 刘芳 A kind of nanometer of WC particle enhances high chromium iron-base powder metallurgy material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111961984A (en) * 2019-05-20 2020-11-20 海安县鹰球粉末冶金有限公司 Powder metallurgy oil-retaining bearing formula

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Application publication date: 20190312