CN105886929A - Iron-based insert material and preparation method - Google Patents

Iron-based insert material and preparation method Download PDF

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Publication number
CN105886929A
CN105886929A CN201610419511.6A CN201610419511A CN105886929A CN 105886929 A CN105886929 A CN 105886929A CN 201610419511 A CN201610419511 A CN 201610419511A CN 105886929 A CN105886929 A CN 105886929A
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hour
degree celsius
iron
powder
insert material
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CN201610419511.6A
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Chinese (zh)
Inventor
程叙毅
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Wuhu Sandao Material Technology Co Ltd
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Wuhu Sandao Material Technology Co Ltd
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Priority to CN201610419511.6A priority Critical patent/CN105886929A/en
Publication of CN105886929A publication Critical patent/CN105886929A/en
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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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C22C33/0264—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements the maximum content of each alloying element not exceeding 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
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • 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
    • C22C38/04—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
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Powder Metallurgy (AREA)

Abstract

The invention discloses an iron-based insert material and a preparation method. The insert material is prepared from 92.5-98.5% of Fe, 0.5-0.8% of C, 1.5-2.0% of Cu, 0.01-0.05% of Sn, 0.03-0.15% of Si, 0.1-0.3% of Mn, 0.02-0.03% of S, 0.3-0.5% of Mo, 0.3-2.5% of Cr, 0.05-0.3% of B, 0.5-3% of RE and 0.3-0.5% of EBS. By means of the working procedures of precasting, molding, quenching, tempering and the like, the hardness HRB reaches 85-95. By adding specific reinforcement elements and the rear earth element, the oxidation resistance and forming performance of the iron-based insert material are better than those of a common product, meanwhile, the hardness of a matrix and carbide is improved, and the product can meet the requirements of the insert for strength and hardness.

Description

A kind of iron-based insert material and preparation method
Technical field
The present invention relates to field of powder metallurgy, be specifically related to a kind of iron-based insert material and preparation method.
Background technology
nullPowder metallurgy is widely used in agricultural machinery、Automobile、Lathe、Instrument、Weaving、The fields such as light industry，Its smelting temperature of high temperature melting point metals is at a relatively high，Conventional cast is had any problem,And practicality powder metallurgy process can significantly reduce its sintering activating energy (such as tungsten、Zirconium、Chromium、The metals such as molybdenum),Thus with relatively low temperature sinter molding，In addition，Powder metallurgy is because using powder sintered，Its material itself possesses certain aperture，So there being natural advantage in terms of preparing porous material，Advantage due to PM technique，It plays very important effect in the development of new material，But it is as the development in epoch and to product combination property and the continuous lifting of economy，Existing product is far from the demand meeting people，So non-oxidizability is strong、Formability is good，Have wearability concurrently simultaneously、The alloy product research and development of the multiple performance of toughness and upgrading are extremely the most urgent.
Nickel is not easy diffusion uniformly in sintering process, form rich austenitic district, the impact flexibility of material can be improved while to matrix solution strengthening, copper is at a sintering temperature for liquid-phase sintering, invigoration effect effective to iron-based, easily diffusion is uniformly, cause matrix size expansion, it is necessarily drawn to add carbon and nickel element reduces size expansion, molybdenum can form solution strengthening and can form carbide, increase the strength of materials, improve stability and the quenching degree of tempering, the mainly diffusion of each migration of element principle, each element skewness in the base, intensity and the toughness of P/m Iron Base structural material can be effectively improved by adding part prediffusion alloy, the intensity of material can be preferably promoted finally by heat treatment.
Rare earth element adds the oxygen that alloy can effectively absorb in mechanical milling process and when sintering, alloying element surface combines, reduce decarburization and improve copmbined-carbon content, rare earth exists the most in the form of an oxide, form dispersion-strengtherning effect, increase matrix strength, but the liquid film that the raising of carbon content causes alloy liquid phase sintering to be formed has certain inhibition to other diffusion of alloy elements, makes material impact toughness decline.
Summary of the invention
In order to solve the problem of above-mentioned existence, the invention provides a kind of iron-based insert material and preparation method, concrete steps and technological parameter be as follows:
(1) prepared by raw material: according to iron-based insert material intensity and hardness requirement, weighs following component material according to proportion of composing:
Fe:92.5-98.5%, C:0.5-0.8%, Cu:1.5-2.0%, Sn:0.01-0.05%, Si:0.03-0.15%, Mn:0.1-0.3%, S:0.02-0.03%, Mo:0.3-0.5%, Cr:0.3-2.5%, B:0.05-0.3%, RE:0.5-3%, EBS:0.3-0.5%；
(2) Feedstock treating: according to the physical property of each component, Fe, Cu, Sn, Si, Mn, Mo, Cr powder is dried 2-5 hour respectively in the cleaning oven of 80-200 degree Celsius, B, C, RE, S powder is dried 2-24 hour in the cleaning oven of 50-80 degree Celsius；
(3) component mixing: the above-mentioned powder dried all being added powder mixer, and is thoroughly mixed, mixing time is 1-3 hour, is subsequently adding the EBS of 0.3-0.5%, proceeds stirring mixing 1-3 hour；
(4) preforming: preheated 1.5-2.5 hour under 100-150 degree Celsius by mould, pours the powder of mix homogeneously into pre-pressing die, then suppresses at 50 tons of forming machines, Stress control at 500-650 MPa, 2-4 hour press time；
(5) high-temperature molding: the stampings of preforming are taken out from mould; it is put in the iron-based sintering furnace of band gas shield atmosphere being sintered molding; reach 450-550 degree Celsius in temperature simultaneously and be incubated 1.5-2.5 hour; temperature is incubated 1.5-2.5 hour at 650-750 degree Celsius; finally temperature is controlled at 1150-1280 degree Celsius, sinter 2.5-4 hour；
(6) heat treatment: the product after sintering is carried out heat treatment, at 820-850 degree Celsius, the carbon potential at 0.6%-0.8% is protected in atmosphere and is heated 0.5-1 hour, quenches, and is then tempered 0.5-1 hour at 180-260 degree Celsius.
The advantage of the present invention is:
(1) the appropriate rare earth element that the present invention adds can increase the content of pearlite in alloy of ferrous based powder metallurgical, and tissue crystal grain is grown up further simultaneously, plays the effect of crystal grain thinning, thus effectively promotes quenching hardness and the tensile strength of metal parts；
(2) novel organic phase-change series lubricant agent is rationally added, make that production process addition is few, greasy property good, produce under high pressure and spend mutually, it is liquid by solid state transformation, gap along powder flows to die wall surface, and a tunic layer is formed on die wall surface so that lubricant is changed into die wall lubrication function by in-lubricant, substantially increases mold base density and the intensity of goods；
(3) after high-temperature molding, by performances such as specific quenching, temper, the intensity of effective improving product, hardness, wearability and fatigue strength.
Detailed description of the invention
Embodiment 1
(1) prepared by raw material: according to iron-based insert material intensity and hardness requirement, weighs following component material according to proportion of composing:
Fe:96.39%, C:0.5%, Cu:1.5%, Sn:0.01%, Si:0.03%, Mn:0.1%, S:0.02%, Mo:0.3%, Cr:0.3%, B:0.05%, RE:0.5%, EBS:0.3%, wherein RE is rare-earth elements La；
(2) Feedstock treating: according to the physical property of each component, dries Fe, Cu, Sn, Si, Mn, Mo, Cr powder 2 hours in the cleaning oven of 80 degrees Celsius respectively, is dried 2 hours by B, C, RE, S powder in the cleaning oven of 50 degrees Celsius；
(3) component mixing: the above-mentioned powder dried all being added powder mixer, and is thoroughly mixed, mixing time is 1 hour, is subsequently adding the EBS of 0.3%, proceeds stirring mixing 1 hour；
(4) preforming: preheated 1.5 hours under 100 degrees Celsius by mould, pour the powder of mix homogeneously into pre-pressing die, then suppresses at 50 tons of forming machines, Stress control at 500 MPas, 2 hours press times；
(5) high-temperature molding: the stampings of preforming are taken out from mould; it is put in the iron-based sintering furnace of band gas shield atmosphere being sintered molding; reach 450 degrees Celsius in temperature simultaneously and be incubated 1.5 hours; temperature is incubated 1.5 hours at 650 degrees Celsius; finally temperature is controlled at 1150 degrees Celsius, sinter 2.5 hours；
(6) heat treatment: the product after sintering is carried out heat treatment, at 820 degrees Celsius, the carbon potential 0.6% is protected in atmosphere and is heated 0.5 hour, quenches, and is then tempered 0.5 hour at 180 degrees Celsius.
Embodiment 2
(1) prepared by raw material: according to iron-based insert material intensity and hardness requirement, weighs following component material according to proportion of composing:
Fe:92.57%, C:0.8%, Cu:2.0%, Sn:0.05%, Si:0.15%, Mn:0.3%, S:0.03%, Mo:0.5%, Cr:2.5%, B:0.3%, RE:0.5%, EBS:0.3%, wherein RE is Y；
(2) Feedstock treating: according to the physical property of each component, dries Fe, Cu, Sn, Si, Mn, Mo, Cr powder 2 hours in the cleaning oven of 80 degrees Celsius respectively, is dried 10 hours by B, C, RE, S powder in the cleaning oven of 60 degrees Celsius；
(3) component mixing: the above-mentioned powder dried all being added powder mixer, and is thoroughly mixed, mixing time is 1 hour, is subsequently adding the EBS of 0.3%, proceeds stirring mixing 2 hours；
(4) preforming: preheated at one hundred and twenty degrees centigrade by mould 1.5 hours, pour the powder of mix homogeneously into pre-pressing die, then suppresses at 50 tons of forming machines, Stress control at 550 MPas, 2.5 hours press times；
(5) high-temperature molding: the stampings of preforming are taken out from mould; it is put in the iron-based sintering furnace of band gas shield atmosphere being sintered molding; reach 450 degrees Celsius in temperature simultaneously and be incubated 1.5 hours; temperature is incubated 1.5 hours at 650 degrees Celsius; finally temperature is controlled at 1150 degrees Celsius, sinter 2.5 hours；
(6) heat treatment: the product after sintering is carried out heat treatment, at 850 degrees Celsius, the carbon potential 0.8% is protected in atmosphere and is heated 0.5-1 hour, quenches, and is then tempered 0.5 hour at 180 degrees Celsius.
Embodiment 3
(1) prepared by raw material: according to iron-based insert material intensity and hardness requirement, weighs following component material according to proportion of composing:
Fe:95.58%, C:0.66%, Cu:1.5%, Sn:0.02%, Si:0.03%, Mn:0.1%, S:0.02%, Mo:0.4%, Cr:0.4%, B:0.06%, RE:0.8%, EBS:0.4%, wherein RE is Ce；
(2) Feedstock treating: according to the physical property of each component, dries Fe, Cu, Sn, Si, Mn, Mo, Cr powder 5 hours in the cleaning oven of 90 degrees Celsius respectively, is dried 5 hours by B, C, RE, S powder in the cleaning oven of 70 degrees Celsius；
(3) component mixing: the above-mentioned powder dried all being added powder mixer, and is thoroughly mixed, mixing time is 2 hours, is subsequently adding the EBS of 0.4%, proceeds stirring mixing 1.5 hours；
(4) preforming: preheated 2.5 hours under 130 degrees Celsius by mould, pour the powder of mix homogeneously into pre-pressing die, then suppresses at 50 tons of forming machines, Stress control at 650 MPas, 4 hours press times；
(5) high-temperature molding: the stampings of preforming are taken out from mould; it is put in the iron-based sintering furnace of band gas shield atmosphere being sintered molding; reach 550 degrees Celsius in temperature simultaneously and be incubated 2.5 hours; temperature is incubated 2.5 hours at 750 degrees Celsius; finally temperature is controlled at 1250 degrees Celsius, sinter 4 hours；
(6) heat treatment: the product after sintering is carried out heat treatment, at 850 degrees Celsius, the carbon potential 0.8% is protected in atmosphere and is heated 1 hour, quenches, and is then tempered 0.5 hour at 180 degrees Celsius.

Claims (2)

1. an iron-based insert material and preparation method, it is characterised in that the proportion of composing of insert material raw material is: Fe:92.5-98.5%, C:0.5-0.8%, Cu:1.5-2.0%, Sn:0.01-0.05%, Si:0.03-0.15%, Mn:0.1-0.3%, S:0.02-0.03%, Mo:0.3-0.5%, Cr:0.3-2.5%, B:0.05-0.3%, RE:0.5-3%, EBS:0.3-0.5%.
Iron-based insert material the most according to claim 1 and preparation method, it is characterised in that main preparation process and technological parameter are as follows:
(1) prepared by raw material: according to iron-based insert material intensity and hardness requirement, weighs following component material according to proportion of composing:
Fe:92.5-98.5%, C:0.5-0.8%, Cu:1.5-2.0%, Sn:0.01-0.05%, Si:0.03-0.15%, Mn:0.1-0.3%, S:0.02-0.03%, Mo:0.3-0.5%, Cr:0.3-2.5%, B:0.05-0.3%, RE:0.5-3%, EBS:0.3-0.5%；
(2) Feedstock treating: according to the physical property of each component, Fe, Cu, Sn, Si, Mn, Mo, Cr powder is dried 2-5 hour respectively in the cleaning oven of 80-200 degree Celsius, B, C, RE, S powder is dried 2-24 hour in the cleaning oven of 50-80 degree Celsius；
(3) component mixing: the above-mentioned powder dried all being added powder mixer, and is thoroughly mixed, mixing time is 1-3 hour, is subsequently adding the EBS of 0.3-0.5%, proceeds stirring mixing 1-3 hour；
(4) preforming: preheated 1.5-2.5 hour under 100-150 degree Celsius by mould, pours the powder of mix homogeneously into pre-pressing die, then suppresses at 50 tons of forming machines, Stress control at 500-650 MPa, 2-4 hour press time；
(5) high-temperature molding: the stampings of preforming are taken out from mould; it is put in the iron-based sintering furnace of band gas shield atmosphere being sintered molding; reach 450-550 degree Celsius in temperature simultaneously and be incubated 1.5-2.5 hour; temperature is incubated 1.5-2.5 hour at 650-750 degree Celsius; finally temperature is controlled at 1150-1280 degree Celsius, sinter 2.5-4 hour；
(6) heat treatment: the product after sintering is carried out heat treatment, at 820-850 degree Celsius, the carbon potential at 0.6%-0.8% is protected in atmosphere and is heated 0.5-1 hour, quenches, and is then tempered 0.5-1 hour at 180-260 degree Celsius.
CN201610419511.6A 2016-06-14 2016-06-14 Iron-based insert material and preparation method Pending CN105886929A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1039548A (en) * 1988-07-15 1990-02-14 康宁玻璃公司 Under no sintering aid with the technology of metal powder sintered one-tenth structural part
CN1344814A (en) * 2000-08-31 2002-04-17 川崎制铁株式会社 Iron-base sintered powder metal body, its manufacture and manufacture of high-strength high-density iron-base sintering assembly
CN1839006A (en) * 2004-04-22 2006-09-27 杰富意钢铁株式会社 Mixed powder for powder metallurgy
CN101384387A (en) * 2006-02-15 2009-03-11 杰富意钢铁株式会社 Iron-based powder mixture, and method of manufacturing iron-based compacted body and iron-based sintered body
CN102990068A (en) * 2012-11-22 2013-03-27 宁波市群星粉末冶金有限公司 Powder metallurgy gear
CN103252497A (en) * 2013-04-09 2013-08-21 吴建平 Preparation method of machine tool slider by powder metallurgy
CN103451538A (en) * 2013-09-12 2013-12-18 合肥波林新材料有限公司 High-strength wearproof iron-based powder metallurgy bearing material and preparation method thereof
CN103589967A (en) * 2013-10-23 2014-02-19 桐城市汽车部件有限公司 Rare earth-containing powder metallurgy natural gas engine valve seat ring
CN105263653A (en) * 2013-06-07 2016-01-20 杰富意钢铁株式会社 Alloy steel powder for powder metallurgy and method of producing iron-based sintered body
CN105441804A (en) * 2015-11-13 2016-03-30 太仓旺美模具有限公司 Impact resistant composite metal material

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* Cited by examiner, † Cited by third party
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CN1039548A (en) * 1988-07-15 1990-02-14 康宁玻璃公司 Under no sintering aid with the technology of metal powder sintered one-tenth structural part
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CN1839006A (en) * 2004-04-22 2006-09-27 杰富意钢铁株式会社 Mixed powder for powder metallurgy
CN101384387A (en) * 2006-02-15 2009-03-11 杰富意钢铁株式会社 Iron-based powder mixture, and method of manufacturing iron-based compacted body and iron-based sintered body
CN102990068A (en) * 2012-11-22 2013-03-27 宁波市群星粉末冶金有限公司 Powder metallurgy gear
CN103252497A (en) * 2013-04-09 2013-08-21 吴建平 Preparation method of machine tool slider by powder metallurgy
CN105263653A (en) * 2013-06-07 2016-01-20 杰富意钢铁株式会社 Alloy steel powder for powder metallurgy and method of producing iron-based sintered body
CN103451538A (en) * 2013-09-12 2013-12-18 合肥波林新材料有限公司 High-strength wearproof iron-based powder metallurgy bearing material and preparation method thereof
CN103589967A (en) * 2013-10-23 2014-02-19 桐城市汽车部件有限公司 Rare earth-containing powder metallurgy natural gas engine valve seat ring
CN105441804A (en) * 2015-11-13 2016-03-30 太仓旺美模具有限公司 Impact resistant composite metal material

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