CN106801183A - A kind of preparation method of monikrom cast iron base TiN steel bonded carbide - Google Patents
A kind of preparation method of monikrom cast iron base TiN steel bonded carbide Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
- C22C37/08—Cast-iron alloys containing chromium with nickel
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
- C22C1/053—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor with in situ formation of hard compounds
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- C22C29/005—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides comprising a particular metallic binder
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- C22C29/16—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on nitrides
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- 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%
- C22C33/0292—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% with more than 5% preformed carbides, nitrides or borides
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- C22C33/08—Making cast-iron alloys
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- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
Abstract
The present invention relates to a kind of preparation method of monikrom cast iron base TiN steel bonded carbide, it is characterised in that fabricated in situ TiN powder is prepared：By Ti02 powder, TiH2 powder Ti powder is one kind of or three kinds and urea ((NH2) 2CO) by N/ Ti atomic ratios for 0.4~1.1 carries out being configured to fabricated in situ TiN mixed-powders；By molybdenum-iron powder, vanadium iron powder, ferrochrome powder, ferromanganese powder, ferrosilicon powder, iron powder, nickel powder, aquadag and the rare earths material proportions as needed for bonding phase metal chemical composition mass ratio, load steel ball ball milling, wherein adding absolute ethyl alcohol to make medium and PVA, compressing after slurry is dried after ball milling, sintering obtains TiN steel-bonded carbides.With liquid phase sintering technology be combined in-situ reactive synthesis technology by the present invention, and enhancing particle size is tiny, and surface combines preferable and clean interfaces without wedge angle, basal body interface.Prepared steel-bonded carbide method can improve the comprehensive mechanical property of alloy, and cheap, and technique is easy.
Description
Invention field
The present invention relates to a kind of preparation method of monikrom cast iron base TiN steel bonded carbide, particularly with reaction
Sintering process produces monikrom cast iron base TiN steel bonded carbide technical fields.
Background of invention
Steel bonded carbide（Hereinafter referred to as steel-bonded carbide）It is that, with steel as matrix, tungsten carbide, titanium carbide etc. are used for hard phase
The high life mold materials between hard alloy and alloy tool steel, mould steel and high-speed steel of powder metallurgy process production
And engineering material.The ratio range of steel-bonded carbide steel matrix Binder Phase and hard phase quite it is extensive, this just determine it possess as
Lower excellent properties：1）Extensive processing performance, mainly can forgeability and machinable performance and heat-treatability and
Weldability.2）Good physical and mechanical properties, is mainly manifested in the wearability suitable with high-cobalt hart metal；Compared with steel
Rigidity high, elastic modelling quantity, bending strength and compression strength；The toughness higher compared with hard alloy；And good profit certainly
Slip and damping characteristic high etc..3）Excellent chemical stability, such as high temperature resistant, anti-oxidant, anti-various dielectric corrosions.Due to
The above-mentioned excellent combination property of steel-bonded carbide so that it is in tool die material, wear part, high temperature resistant and corrosion resistant member material
The aspects such as material more and more occupy consequence, and intermetallic composite coating, hardware electronics, automobile, machinery, metallurgy, chemical industry, ship,
It is used widely and obtains good result in the field such as Aero-Space and nuclear industry.Such as with alloy tool steel, mould steel and height
Fast steel is compared, and steel-bonded carbide can be such that die life number is increased substantially with ten times of ground, and economic benefit is also extremely notable.
In recent years, to obtain some particular tissues and performance of steel bonded carbide, and alleviate due to conventional rigid alloy
The problems such as material Main Resources W, Co are increasingly deficient, has carried out to steel bonded carbide ground with deep more extensively both at home and abroad
Study carefully, particularly to add different New Rigid phases research (such as addition A1203, TiN, NbC, TiCN, TiB2, Mo2FeB2,
Mo2C, Cr3C2, VC, NV etc.).In recent years, some new hard phase steel-bonded carbides are continued to bring out.
TiB2 has heat-resisting quantity good, and density and resistivity are small, and conductibility is good, and metal adhesiveness is low and friction factor
It is low, the features such as inoxidizability is strong, it is considered to be a kind of preferable steel-bonded carbide hard phase.Because of the solid solubility between Fe and TiB2
Low, wetability is good, and Mo can also improve its wetability, therefore the advantage of synthesis TiB2 and Fe, Mo, has made TiB.FeMo composite woods each
Material.
Japanese certain company develops and a kind of does not contain W, Co but the boride-based composite KMH of the M02FeB2 types containing Cr.
Such polynary boride-based alloy be prepared using water atomization Fe-Cr-B alloy powders, boride powder and Fe, Cr, Mo,
The metal dusts such as Ni make raw material, are manufactured through wet-milling mixing, compressing and vacuum-sintering method.
In addition to above-mentioned new steel bonded carbide, Japanese some companies also utilize a variety of hard compounds (such as
TiC, VC, Cr3C2, SiC, ZrC, AlN etc.) and its mixed compound make hard phase, make binding agent with various steel or ferrous alloy,
Develop some advanced composite material (ACM)s.
Meanwhile, people are also constantly seeking the combination of new hard phase and new Binder Phase, to develop with optimal
The MC type particulate reinforced composites of tissue and performance.In steel-bonded carbide, the hard particulate carbide species as wear-resistant phase
Compare many, there is the ceramic particles such as WC, TiC, Cr7C3, NbC, VC, SiC and alloy carbide and cementite.MC type carbide
Thermodynamic stability putting in order from high to low be：TiC ＞ NbC ＞ VC ＞ WC, putting in order for its hardness be：TiC ＞ VC
＞ WC ＞ NbC.It is known that TiC is poor with Fe intermiscibilities.Sintering temperature is high, and strength ratio WC is poor, and its advantage is light weight, thermally-stabilised
Property, frictional property are good；WC high temperature is bad with Fe intermiscibilities, is easily dissolved in Fe during high temperature, and high high-temp stability, calorific intensity are poor,
Separated out in cooling procedure so as to form bridge joint, deteriorate the mechanical performance of alloy；As carbide V element, with
Ti elements are similar to, and V is also a kind of very active alloying element, first with C, N etc. to have very strong affinity.The parent of V element and C
With power more than Cr elements and the affinity of C, two kinds of stable carbides of VC and V2C are easily formed.In carbide ceramics, VC's is hard
Degree highest, and have good heat endurance, it is a kind of preferable hard enhancing phase.
Ti base cemented carbides refer to the hard alloy that TiC or Ti (C, N) is matrix.Compared with WC base cemented carbides, Ti bases
The hardness of hard alloy is higher, and density is small, and high temperature resistant, wear-resistant, corrosion resistance are stronger, and with very good anti stick, anti-
The ability of diffusive wear.Ti base cemented carbides can be divided into by composition and performance:（1）TiC based alloys；（2）Ti (C, N) based alloy.
Because TiC based alloy toughness is very low, too many concern is never obtained.Until 20 century 70s, Kieffer et al. has found
In addition TiN to TiC-Mo-Ni series hard metals, hard phase crystal grain is significantly refined, the room temperature and high temperature power of hard alloy
Learning performance is also substantially improved, and adds appropriate TiN, can improve TiC steel bonded carbide into nuclear concentration, refinement is brilliant
Grain promotes homogeneous grain size, and the high temperature corrosion-resisting and inoxidizability of hard alloy can also be significantly increased after addition TiN
Can, while improving the hardness and bending strength of material.In addition, the addition of TiN produces interfacial effect to reduce the effect of crystal boundary, suppression
Dislocation motion in fracture process processed, pinning effect is played to breakaway poing can also improve intensity.Therefore, Ti (C, N) bases hard is closed
Gold causes the great interest of researchers.TiN is strong as the small oxidation resistance of hard phase free energy, and it rubs and steel matrix between
Effect is small, and the wetability of its Binder Phase is better than TiC, and antisticking ability is more stronger than TiC, and free energy is smaller, oxidation resistance temperature model
Enclose big.
Ai Te Vit of Germany have developed a kind of ITE of steel bonded carbide CORO mono- using TiN as hard phase.
TiN particle sizes in the ITE of hard alloy CORO mono- are about 0.1 um, are evenly distributed in heat treatable steel matrix,
Therefore CORO-ITE is provided simultaneously with the high rigidity of hard alloy and the high tenacity of steel matrix.CORO-ITE hard alloy oneself successfully
Apply in many fields, show excellent performance and the potentiality being improved.The milling cutter manufactured with CORO-ITE hard alloy is cut
The rate of cutting is 3 times of high-speed steel milling cutter, while its use time extends 2 times.
Sandvik AB of Sweden has developed a kind of new steel-bonded carbide CORONlTE based on TiN.They are using a kind of
Special process, the TiN powder of superfine (about 0.1 micron) is equably added in heat treatable steel matrix, its volume content
Can be from 35% to 60%, because TiN powder is thin and performance and its stabilization, obtained CORONITE alloys have concurrently by this method
The wearability of hard alloy and the toughness of high-speed steel.
Japan also develops being machined and heat treatable steel with TiN as hard phase using water atomization and sintering process
Bond hard alloy H34A.Mix with 10wt%TiN powder by by the water atomization comminuted steel shot of tungsten, aluminium and high carbon content, re-compacted shaping
Sintering obtains H34A afterwards.H34A reaches 46~48HRc by hardness after annealing, can be machined, and H34A tempering
Hardness is more up to more than 72HRc, because matrix is hardened and WC due to possessing high-carbon quantity, the disperse of MoC, TiN particle
Reinforcing, therefore the alloy possesses excellent cutting ability.During as the such as cutting element of drill bit, end mill(ing) cutter etc, performance is bright
It is aobvious to be better than high-speed steel and ordinary rigid alloy.
The presence of TiN can improve alloy eutectic temperature, hinder Ti and Mo to carry out counterdiffusion by liquid phase so that Mo in liquid phase
Content increases and the concentration of Ti reduces, and while the precipitation for suppressing crystal grain is grown up, also inhibits the formation of brittle interphase, from
And cermet is obtained toughness and wearability higher.By adding TiN, the nucleation that can improve TiC steel bonded carbide is dense
Degree, crystal grain thinning promotes homogeneous grain size, while improving the hardness and bending strength of material.In addition, the addition of TiN is produced
Interfacial effect reduces the effect of crystal boundary, suppresses the dislocation motion in fracture process, and pinning effect is played to breakaway poing can also be carried
High intensity.Therefore, researching and developing new TiN bases steel bonded carbide has good economic benefit, to widening hard alloy
Hard phase, saves precious alloy resource, improves its industrial value and application value, has great importance.
TiN based ceramic metals have density low, and hardness is high, wear-resistant, the excellent physical and mechanical properties such as resistance to high temperature oxidation,
And low production cost, there is high cost performance, conventional rigid alloy material can be substituted, it is widely used at a high speed, high accuracy
Tool for cutting machining on.Meanwhile, this novel hard alloy can be replaced in industries such as automobile, metallurgy, mine, building materials and moulds
For traditional high-abrasive material, parts service life is increased substantially, economized on resources, with good economic results in society.This
Outward, artificial with industrial wilderness demand and inevitably to waste, China or even worldwide W, Co resource are
Through quite poor, price rises steadily, and each national capital Efforts To Develop seeks the research and development of the substitute material of W, Co.And China TiV
Ore resources enrich, and replace W to have feasibility very high in resource with Ti.Therefore, research and development TiN bases steel bonded carbide without
In terms of being engineer applied, or all it is significant in terms of Technological Economy.
The obdurability of the alloy manufactured by steel bonded carbide manufacturing process developed at present is still relatively low, far from satisfaction
More and more power of withstanding shocks are larger, the use in the case of impact velocity is higher.Therefore Development and Production high-performance, low cost
Steel bonded carbide is necessary.Wherein, the obdurability for improving steel-bonded carbide is the research direction of emphasis.
At present, the method mainly powder metallurgy lqiuid phase sintering method of steel bonded carbide is prepared.Lqiuid phase sintering method can be with root
The appropriate Binder Phase of selection and can be in the interior content for adjusting hard phase in a big way, but due to powder metallurgy is needed according to practical application
The hard phase of lqiuid phase sintering method is generally introduced in the way of adding, and the cost of raw material is high, particle is thick, hard phase titanium carbide and bonding
Bad, interface vulnerable to pollution of wetability of phase etc., therefore there is porosity by steel bonded carbide prepared by lqiuid phase sintering method
The shortcomings of height, low performance, high cost, for requiring that application scenario higher is often needed by forging or hip treatment, material
The cost performance of material is further reduced.
In recent years, the research that steel bonded carbide is prepared using in-situ synthesis has been carried out both at home and abroad.Situ synthesis techniques
Be it is a kind of designed by alloy, under certain condition in parent metal reaction in-situ to generate one or more thermodynamically stable
The advanced composite material (ACM) technology of preparing of hard phase.Compared with traditional material preparation method, the technology have preparation process is simple,
The enhancing of produced in situ is not mutually contaminated, is becoming for steel bonded carbide technology of preparing development the features such as interface bond strength is high
Gesture.
But in-situ synthesis also have many deficiencies:Enhancing particle is only limited to the thermodynamically stable grain in particular substrate；
Generation compared to more complicated, whard to control；Granular size, shape receive forming core, the dynamics Controlling of growth process, and in-situ particle
After formation, often meeting segregation asks gap or grain boundary in dendrite in casting process, and bad shadow is produced to material structure and performance
Ring, and manufacturability is poor, and preparation cost is higher than existing process, is unsuitable for large-scale production.Obviously, situ synthesis techniques are realized producing
The key of industry is must further to study rational homogenization process, optimum synthesis technique, reduction production cost.
The content of the invention
In view of the shortcomings of the prior art, the invention provides a kind of monikrom cast iron base TiN steel bonded carbide
Preparation method, is used to improve the performance of TiN steel bonded carbide.
A kind of preparation method of monikrom cast iron base TiN steel bonded carbide of the invention, it uses following technology
Scheme：
(1) raw material：Raw materials are that Ti02 powder, TiH2 powder or Ti powder are one kind of or three kinds, ferrochrome powder, molybdenum-iron powder,
Vanadium iron powder, nickel powder, iron powder, ferrosilicon powder, ferromanganese powder, aquadag, industrial urea ((NH2) 2CO) or ammoniacal liquor, CeO2、Y3O2、
La2O3One of them or three kinds, PVA, powder size is at 10~50 μm；
(2) material is prepared：
1）Fabricated in situ TiN powder is prepared：By Ti02 powder, TiH2 powder or Ti powder is one kind of or three kinds and urea ((NH2)
2CO) carry out being configured to fabricated in situ TiN mixed-powders for 0.4~1.1 by N/ Ti atomic ratios；
2）Bonding phase matrix alloy powder is prepared：Bonding phase metal material chemical composition mass percent is：C2.9~3.7%,
Cr1.3~2.5%, Mo0.2~0.6%, Ni0.5~2.0%, V0.2~0.6%, Si1.2~2.0%, Mn0.4~1.2%, S≤
0.02%, P≤0.02%, CeO2、Y3O2、La2O3Combination≤0.8% of one of them or more than two kinds, balance of Fe and can not keep away
The impurity element exempted from；
3）Monikrom cast iron base TiN Steel-bonded Cemented Carbides are prepared：Material chemical composition mass percent is：Close original position
Into TiN powder 30~50%, bonding phase matrix alloy powder 70~50%；
(3) step of preparation process is：
1）TiN powder material is prepared：By Ti02 powder, TiH2 powder or Ti powder is one kind of and industrial urea ((NH2) 2CO) presses N/
Ti atomic ratios carry out being configured to fabricated in situ TiN mixed-powders for 0.4~1.1；It is fitted into polyurethane ball milling bucket, loads stainless steel
Steel ball, ratio of grinding media to material 10:1~20:1, add absolute ethyl alcohol to make medium and dispersant, carry out sealing ball milling 48 using vibrations ball mill
~72 hours, it is prepared into TiN powder；
2）Material is prepared：TiN powder and ferrochrome powder, the molybdenum-iron powder that will be prepared, nickel powder, vanadium iron powder, ferrosilicon powder, ferromanganese powder, root
Converted according to required chemical composition mass percent, together with iron powder, aquadag, CeO2、Y3O2、La2O3One of them or two kinds
Combination raw materials above proportions as needed for bonding phase metal material chemical composition mass percent；
3）The ratio of fabricated in situ TiN mixed-powders and bonding phase matrix alloy powder according to needed for Steel-bonded Cemented Carbide
Two kinds of materials are mixed, is fitted into ball milling bucket, loaded steel ball, ratio of grinding media to material 5:1~10:1, add absolute ethyl alcohol make medium and
0.5~1%PVA adds 5~10% industrial ureas or ammoniacal liquor as nitrogen source, using vibrations ball mill as cooling agent and dispersant
Carry out sealing ball milling 48~72 hours；
4）Sieved after slurry is dried, the product of required size shape is then pressed under 350~500 MPa pressure；
5）Sinter under vacuum, sintering temperature is 1400 DEG C~1500 DEG C, sintering process is:10 DEG C/min of firing rate,
The Isothermal sinter of 2~5 hours is carried out after arrival sintering temperature, furnace cooling to room temperature obtains the chromium nickel-molybdenum alloy of required composition
Cast iron base TiN steel bonded carbide.
Beneficial effect
Compared with prior art, the invention has the advantages that：
1st, the present invention is with cheap Ti02 powder, TiH2 powder or Ti powder, iron powder, ferrochrome powder, molybdenum-iron powder, ferrotungsten powder, vanadium iron powder,
Ferrosilicon powder, ferromanganese powder, aquadag is raw material, and in-situ reactive synthesis technology is combined with liquid phase sintering technology, is prepared for hard
Matter phase vanadium carbide volume fraction is 30%~50% high tough VC high-speed steel-bases steel bonded carbide.It is mainly characterized by：1. by
VC in steel bonded carbide is in intrinsic silicon fabricated in situ by the reaction in sintering process, it is possible to obtain general
The method of logical hardening phase powder mixing is difficult to reach, or even inaccessiable granular and uniformity coefficient, and basal body interface is combined
Preferable and clean interfaces.2. fabricated in situ enhancing particle size is tiny, and surface is evenly distributed in the base without wedge angle, so that
Improve the bending strength and properties of material.3. situ synthesis techniques are combined together with liquid phase sintering technology, technique
Easy, low cost.4. it is cheap due to raw material, cost can be substantially reduced.Not only may be used in the technique of this powder simultaneously
To sinter in a vacuum, it is also possible to how to sinter in the atmosphere such as hydrogen, widened the means approach manufactured.
The present invention improves the activity of powder using high-energy ball milling mode, and reaches titanium carbide with the machinery conjunction of steel matrix powder
The degree of aurification, so as to improve titanium carbide and compatibility of the steel matrix in sintering process, improves the obdurability of final alloy.This
Outward, the present invention in employ the relatively low ferro-molybdenum of price as raw material, its in sintering process further improve titanium carbide with
The wetability of steel matrix, improves the obdurability of alloy.Therefore, the present invention prepares high-performance steel-bonded carbide method and can improve alloy
Comprehensive mechanical property, and process is easy, cost-effective.
2nd, the present invention mutually manufactures new steel bonded carbide by enhancing of TiN, and TiN and Fe has extraordinary intermiscibility,
The two joint interface is good, and high high-temp stability, red hardness are good, in carbide ceramics, the hardness highest of TiN, and have very
Good heat endurance, is a kind of preferable hard enhancing phase, is that TiC, WC substitute reinforcement well.TiN phases can pinning dislocation
With crystal boundary, dislocation and crystal boundary migration are hindered, improve the intensity of steel；The presence of TiN phases simultaneously can also improve the recrystallization temperature of material
Degree and high-temperature behavior.Using TiN do hard phase can also improve steel wearability, corrosion resistance, toughness, ductility and hardness and
The comprehensive mechanical performances such as thermal fatigue resistance, and make steel that there is good solderability, and play the effects such as elimination field trash extension.
3rd, the present invention is by adding CeO2、Y3O2、La2O3Growing up for crystal grain is inhibited, and plays a part of dispersion-strengtherning.By
In CeO2、Y3O2、La2O3Chemical property is active, at a sintering temperature, CeO2、Y3O2、La2O3Can with metal dust interface on
Impurity and oxide-film are acted on, and play a part of to purify interface, contribute to the improvement of wetability, so as to be conducive to entering for densification
Journey, reaches the purpose for reducing porosity, and the reduction of porosity will contribute to the raising of bending strength.CeO2、Y3O2、
La2O3Powder content can play rare earth reinforced and act between 0. 2% and 0. 5%, therefore steel bonded carbide of the invention
Intensity and consistency are improved, and bending strength can reach more than 1700MPa, and consistency reaches 97. more than 4%.
4th, the present invention improves the activity of powder using high-energy ball milling mode, and reaches vanadium carbide and steel matrix powder mechanical alloy
The degree of change, so as to improve vanadium carbide and compatibility of the steel matrix in sintering process, improves the obdurability of final alloy.This
Outward, the relatively low ferroalloy of price is employed as raw material, and after adding a certain amount of molybdenum in the present invention, it is sintered
Further improve the wetability of vanadium carbide and steel matrix in journey, the hard that steel bonded carbide situ is synthesized can be suppressed
Phase VC grows up, and reduces VC particle sizes, is evenly distributed.Wetting of the Binder Phase to hard phase VC is improved after due to adding molybdenum
Property, be conducive to liquid phase in sintering process to the filling of hole, porosity is low, is improved the density of steel bonded carbide,
Crystal grain is tiny, even tissue, so that its hardness and bending strength and obdurability are also improved.Therefore, prepared by the present invention
High-performance steel-bonded carbide method can improve the comprehensive mechanical property of alloy, and process is easy, the easy to operate, sintering period
It is short, process costs are low, be suitable to industrialized production.
5th, the TiN base steel bonded carbide that the present invention is developed has density low, and hardness and bending strength are high, wear-resistant,
The excellent physical and mechanical properties such as resistance to high temperature oxidation, and low production cost, there is high cost performance, can substitute conventional rigid
Alloy material, is widely used at a high speed, high-precision tool for cutting machining, mould, high-temperature structural material etc., it is adaptable to machinery,
Many fields such as chemical industry, automobile making and Aero-Space.
6th, present invention saves expensive rare metal, production cost is reduced.Mass production can be realized, is widened
The hard phase of hard alloy, it is often more important that solve the problems, such as scarcity of resources.With good economic and social benefit.
Specific embodiment
Technical scheme is further illustrated with reference to specific embodiment：
Embodiment 1
A kind of preparation method of monikrom cast iron base TiN steel bonded carbide, it uses following technical scheme：
(1) raw material：
Raw materials be Ti02 powder, ferrochrome powder, molybdenum-iron powder, nickel powder, vanadium iron powder, ferrosilicon powder, ferromanganese powder, iron powder, aquadag,
Industrial urea ((NH2) 2CO) or ammoniacal liquor, CeO2, PVA, powder size is at 10~50 μm；
(2) material is prepared：
1）Fabricated in situ TiN powder is prepared：Ti02 powder and urea ((NH2) 2CO) are prepared for 0.4 by N/ Ti atomic ratios
Into fabricated in situ TiN mixed-powders；
2）Bonding phase matrix alloy powder is prepared：Bonding phase metal material chemical composition mass percent is：C3.0%, Cr1.3%,
Mo0.2%, Ni0.5%, V0.2%, Si1.20%, Mn0.4%, S≤0.02%, P≤0.02%, CeO2、Y3O2、La2O3One of them or
More than two kinds of combination≤0.8%, balance of Fe and inevitable impurity element；
3）Monikrom cast iron base TiN Steel-bonded Cemented Carbides are prepared：Material chemical composition mass percent is：Close original position
Into TiN powder 30%, bonding phase matrix alloy powder 70%；
(3) step of preparation process is：
1）TiN powder material is prepared：Ti02 powder and industrial urea ((NH2) 2CO) are prepared for 0.4 by N/ Ti atomic ratios
Into fabricated in situ TiN mixed-powders；It is fitted into polyurethane ball milling bucket, loads stainless steel steel ball, ratio of grinding media to material 10:1~20:1, add
Absolute ethyl alcohol makees medium and dispersant, and sealing ball milling is carried out 48~72 hours using vibrations ball mill, is prepared into TiN powder；
2）Material is prepared：TiN powder 30% and ferrochrome powder, the molybdenum-iron powder that will be prepared, ferrotungsten powder, vanadium iron powder, ferrosilicon powder, ferromanganese
Powder, converts, together with iron powder, aquadag, CeO according to required chemical composition mass percent2Raw material presses bonding phase metal material
The proportions of material chemical composition mass percent 70%；
3）Two kinds of materials of the fabricated in situ TiN powder 30% needed for Steel-bonded Cemented Carbide and matrix material 70% are mixed
Close, be fitted into ball milling bucket, load steel ball, ratio of grinding media to material 5:1, add absolute ethyl alcohol to make medium and 0.6%PVA as cooling agent and divide
Powder, using vibrations ball mill ball milling 55 hours；
4）Sieved after slurry is dried, the product of required size shape is then pressed under 400 MPa pressure；
5）Sinter under vacuum, sintering temperature is 1400 DEG C, sintering process is:10 DEG C/min of firing rate, reaches sintering
The heat preservation sintering of 2.5 hours is carried out after temperature, furnace cooling to room temperature obtains the monikrom cast iron base TiN of required composition
Steel bonded carbide.
Embodiment 2
A kind of preparation method of monikrom cast iron base TiN steel bonded carbide, it uses following technical scheme：
(1) raw material：
Raw materials are TiH2 powder, ferrochrome powder, molybdenum-iron powder, nickel powder, vanadium iron powder, ferrosilicon powder, ferromanganese powder, iron powder, nickel powder, industry
Urea ((NH2) 2CO) or ammoniacal liquor, aquadag, CeO2、Y3O2Two kinds, PVA, powder size is at 10~50 μm；
(2) material is prepared：
1）Fabricated in situ TiN powder is prepared：IH2 powder and urea ((NH2) 2CO) are configured to for 0.9 by N/ Ti atomic ratios
Fabricated in situ TiN mixed-powders；
2）Bonding phase matrix alloy powder is prepared：Bonding phase metal material chemical composition mass percent is：C3.2%,
Cr1.9%, Mo0.4%, Ni1.5%, V0.4%, Si1.6%, Mn0.8%, S≤0.02%, P≤0.02%, CeO2、Y3O2、La2O3Wherein
One of or more than two kinds of combination≤0.8%, balance of Fe and inevitable impurity element；
3）Monikrom cast iron base TiN Steel-bonded Cemented Carbides are prepared：Material chemical composition mass percent is：Close original position
Into TiN powder 40%, bonding phase matrix alloy powder 60%；
(3) step of preparation process is：
1）TiN powder material is prepared：TiH2 powder and industrial urea ((NH2) 2CO) are prepared for 0.9 by N/ Ti atomic ratios
Into fabricated in situ TiN mixed-powders；It is fitted into polyurethane ball milling bucket, loads stainless steel steel ball, ratio of grinding media to material 10:1~20:1, add
Absolute ethyl alcohol makees medium and dispersant, and sealing ball milling is carried out 48~72 hours using vibrations ball mill, is prepared into TiN powder；
2）Material is prepared：TiN powder 40% and ferrochrome powder, the molybdenum-iron powder that will be prepared, ferrotungsten powder, vanadium iron powder, ferrosilicon powder, ferromanganese
Powder, converts, together with iron powder, aquadag, CeO according to required chemical composition mass percent2Raw material presses bonding phase metal material
The proportions of material chemical composition mass percent 60%；
3）Two kinds of materials of the fabricated in situ TiN powder 40% needed for Steel-bonded Cemented Carbide and matrix material 60% are mixed
Close, be fitted into ball milling bucket, load steel ball, ratio of grinding media to material 5:1, add absolute ethyl alcohol to make medium and 0.6%PVA as cooling agent and divide
Powder, using vibrations ball mill ball milling 55 hours；
4）Sieved after slurry is dried, the product of required size shape is then pressed under 400 MPa pressure；
5）Sinter under vacuum, sintering temperature is 1400 DEG C, sintering process is:10 DEG C/min of firing rate, reaches sintering
The heat preservation sintering of 2.5 hours is carried out after temperature, furnace cooling to room temperature obtains the monikrom cast iron base TiN of required composition
Steel bonded carbide.
Embodiment 3
A kind of preparation method of monikrom cast iron base TiN steel bonded carbide, it uses following technical scheme：
(1) raw material：
Raw materials are Ti powder, ferrochrome powder, molybdenum-iron powder, nickel powder, vanadium iron powder, ferrosilicon powder, ferromanganese powder, iron powder, industrial urea
((NH2) 2CO) or ammoniacal liquor, aquadag, CeO2、Y3O2、La2O3, PVA, powder size is at 10~50 μm；
(2) material is prepared：
1）Fabricated in situ TiN powder is prepared：Ti powder and urea ((NH2) 2CO) are configured to for 1.0 by N/ Ti atomic ratios
Fabricated in situ TiN mixed-powders；
2）Bonding phase matrix alloy powder is prepared：Bonding phase metal material chemical composition mass percent is：C3.5%,
Cr2.5%, Mo0.6%, Ni2.0%, V0.6%, Si2.0%, Mn1.2%, S≤0.02%, P≤0.02%, CeO2、Y3O2、La2O3Wherein
One of or more than two kinds of combination≤0.8%, balance of Fe and inevitable impurity element；
3）Monikrom cast iron base TiN Steel-bonded Cemented Carbides are prepared：Material chemical composition mass percent is：Close original position
Into TiC powder 35%, fabricated in situ TiN powder 50%, bonding phase matrix alloy powder 50%；
(3) step of preparation process is：
1）TiN powder material is prepared：Ti powder and industrial urea ((NH2) 2CO) are configured to for 1.0 by N/ Ti atomic ratios
Fabricated in situ TiN mixed-powders；It is fitted into polyurethane ball milling bucket, loads stainless steel steel ball, ratio of grinding media to material 10:1~20:1, add nothing
Water-ethanol makees medium and dispersant, and sealing ball milling is carried out 48~72 hours using vibrations ball mill, is prepared into TiN powder；
2）Material is prepared：TiN powder 50% and ferrochrome powder, the molybdenum-iron powder that will be prepared, nickel powder, vanadium iron powder, ferrosilicon powder, ferromanganese powder,
Converted according to required chemical composition mass percent, together with iron powder, aquadag, CeO2It is materialized that raw material presses bonding phase metal
Learn the proportions of Ingredient percent 50%；
3）Two kinds of materials of the fabricated in situ TiN powder 50% needed for Steel-bonded Cemented Carbide and matrix material 50% are mixed
Close, be fitted into ball milling bucket, load steel ball, ratio of grinding media to material 5:1, add absolute ethyl alcohol to make medium and 0.6%PVA as cooling agent and divide
Powder, using vibrations ball mill ball milling 55 hours；
4）Sieved after slurry is dried, the product of required size shape is then pressed under 400 MPa pressure；
5）Sinter under vacuum, sintering temperature is 1400 DEG C, sintering process is:10 DEG C/min of firing rate, reaches sintering
The heat preservation sintering of 2.5 hours is carried out after temperature, furnace cooling to room temperature obtains the monikrom cast iron base TiN of required composition
Steel bonded carbide.
Claims (2)
1. a kind of preparation method of monikrom cast iron base TiN steel bonded carbide, it is characterised in that including as follows：
(1) material is prepared：
1）Fabricated in situ TiN powder is prepared：By Ti02 powder, TiH2 powder or Ti powder is one kind of or three kinds and urea ((NH2)
2CO) carry out being configured to fabricated in situ TiN mixed-powders for 0.4~1.1 by N/ Ti atomic ratios；
2）Bonding phase matrix alloy powder is prepared：Bonding phase metal material chemical composition mass percent is：C2.9~3.7%,
Cr1.3~2.5%, Mo0.2~0.6%, Ni0.5~2.0%, V0.2~0.6%, Si1.2~2.0%, Mn0.4~1.2%, S≤
0.02%, P≤0.02%, CeO2、Y3O2、La2O3Combination≤0.8% of one of them or more than two kinds, balance of Fe and can not keep away
The impurity element exempted from；
3）Monikrom cast iron base TiN Steel-bonded Cemented Carbides are prepared：Material chemical composition mass percent is：3 is in situ
Synthesis TiN powder 30~50%, bonding phase matrix alloy powder 70~50%；
(2) step of preparation process is：
1）TiN powder material is prepared：By Ti02 powder, TiH2 powder or Ti powder is one kind of and industrial urea ((NH2) 2CO) presses N/
Ti atomic ratios carry out being configured to fabricated in situ TiN mixed-powders for 0.4~1.1；It is fitted into polyurethane ball milling bucket, loads stainless steel
Steel ball, ratio of grinding media to material 10:1~20:1, add absolute ethyl alcohol to make medium and dispersant, carry out sealing ball milling 48 using vibrations ball mill
~72 hours, it is prepared into TiN powder；
2）Material is prepared：The TiN powder that to prepare and by ferrochrome powder, molybdenum-iron powder, nickel powder, vanadium iron powder, ferrosilicon powder, ferromanganese powder,
Converted according to required chemical composition mass percent, together with iron powder, aquadag, CeO2、Y3O2、La2O3One of them or two
The combination raw materials of kind above proportions as needed for bonding phase matrix alloy powder chemistry Ingredient percent；
3）The ratio of fabricated in situ TiN mixed-powders and bonding phase matrix alloy powder according to needed for Steel-bonded Cemented Carbide
Two kinds of materials are mixed, is fitted into ball milling bucket, loaded steel ball, ratio of grinding media to material 5:1~10:1, add absolute ethyl alcohol make medium and
0.5~1%PVA adds 5~10% industrial ureas or ammoniacal liquor as nitrogen source, using vibrations ball mill as cooling agent and dispersant
Carry out sealing ball milling 48~72 hours；
4）Sieved after slurry is dried, the product of required size shape is then pressed under 350~500 MPa pressure；
5）Sinter under vacuum, sintering temperature is 1400 DEG C~1500 DEG C, sintering process is:10 DEG C/min of firing rate,
The Isothermal sinter of 2~5 hours is carried out after arrival sintering temperature, furnace cooling to room temperature obtains the chromium nickel-molybdenum alloy of required composition
Cast iron base TiN steel bonded carbide.
2. a kind of preparation method of monikrom cast iron base TiN steel bonded carbide according to claim 1, its feature
It is：Raw materials are that Ti02 powder, TiH2 powder or Ti powder are one kind of or three kinds, ferrochrome powder, molybdenum-iron powder, vanadium iron powder, nickel
Powder, iron powder, ferrosilicon powder, ferromanganese powder, aquadag, industrial urea ((NH2) 2CO) or ammoniacal liquor, CeO2、Y3O2、La2O3Wherein it
One or three kind, PVA, powder size is at 10~50 μm.
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| CN109506004A (en) * | 2018-12-21 | 2019-03-22 | 浙江挺宇流体设备股份有限公司 | High stability parallel double-flashboard gate valve |
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