CN105039833B - Ferrovanadium chromium antifriction alloy and preparation method thereof - Google Patents
Ferrovanadium chromium antifriction alloy and preparation method thereof Download PDFInfo
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Abstract
Ferrovanadium chromium antifriction alloy and preparation method thereof, belongs to high-abrasive material preparation field.Using electro-smelting, the melting medium chrome cast iron molten iron first in electric furnace, the chemical composition and mass fraction of medium chrome cast iron molten iron are 3.8 4.0%C, 8.5 9.0%Cr, 2.1 2.4%Mn, 1.0 1.2%Ni, 0.8 1.0%Mo, 1.6 1.8%Nb, 0.5 0.8%Si, 0.035 0.065%Al<0.04%S,<0.04%P, surplus Fe, when medium chrome cast iron molten iron temperature rises to 1,620 1645 DEG C, vanadium iron granule is added, when temperature is down to 1,430 1455 DEG C, molten metal is poured into into casting mold, after casting pouring finishes 24 hours, unpack and take out foundry goods, Jing after polishing sand removal, enter stove heat to process to 180 210 DEG C of destressings, you can obtain the good ferrovanadium chromium antifriction alloy of hardness height, wearability.
Description
Technical field
The invention discloses a kind of antifriction alloy and preparation method thereof, more particularly to the antifriction alloy of iron content-vanadium-chromium and its
Preparation method, belongs to high-abrasive material preparation field.
Background technology
Rich chromium cast iron is a kind of excellent high-abrasive material, and the good main cause of its wearability is containing height in its matrix
The M of hardness7C3Type carbide.But, rich chromium cast iron there is also fragility greatly and wearability is omited under opposing hard grind grinding abrasion industrial and mineral
The inferior position such as inadequate, in order to improve wear resistance of high-chromium iron, Chinese invention patent CN104651705 discloses a kind of hypereutectic resistance to
Mill rich chromium cast iron and preparation method thereof, using electric induction furnace Scrap Smelting, carburant, ferrochrome, ferro-niobium, vanadium iron, ferrosilicon, ferromanganese,
The furnace charges such as ferro-boron, metallic aluminium, obtain hypereutectic high chromium cast iron molten iron, during molten iron is come out of the stove, add particle size with molten iron stream
For the vanadium iron granule of 8～15mm, Ferrotitanium particle and ferrosilicon granule, addition is respectively into molten steel quality fraction in casting ladle
1.2～1.5%, 0.8～1.0% and 0.6～0.8%.Chinese invention patent CN 104357735 also disclose rich chromium cast iron with
The chemical composition of percentage by weight meter includes：C：2.3～2.7 ﹪, Cr：14～16 ﹪, Mo：0.4～0.6 ﹪, Ni：0.3～
0.5 ﹪, Cu：0.3～0.5 ﹪, Si：0.8～1.3 ﹪, Mn：0.6～1.0 ﹪, S≤0.04 ﹪, P≤0.04 ﹪；Remaining is Fe.
Rich chromium cast iron preparation method is included in melting in smelting furnace and forms aluminium alloy Jing after deoxidation treatment, and addition accounts for aluminium alloy gross weight
The composite modifier of the composite inoculant of 0.3～0.6 ﹪ and 0.1～0.2 ﹪, carries out breeding Metamorphism treatment for the first time, and will close
Golden liquid topple over addition casting ladle in bred Metamorphism treatment for the second time, preset in casting ladle and account for 0.2～0.4 ﹪ of aluminium alloy gross weight
Composite inoculant and 0.3～0.6 ﹪ composite modifier, composite inoculant is Ti-V-CaO-BaCO3- Zn composite inoculants,
Composite modifier is rare earth ferrosilicon alloy alterant.This preparation method can improve the anti-ageing ability of moving back for breeding rotten tissue, so that
Rich chromium cast iron has preferably bending strength and anti-wear performance.Chinese invention patent CN 104195420 also discloses a kind of Gao Ge
Cast iron wear-resistant material and heat treatment method, with ferrum as primary raw material, and are equipped with supplemented by carbon, silicon, manganese, sulfur, phosphorus, chromium, molybdenum, nickel, copper
Raw material is helped, melting and casting is formed after preparation, it is characterised in that each chemical component weight percent is specially in liquation：C2.9-
3.1%, Si0.5-0.8%, Mn0.8-1.0%, S0.02-0.05%, P0.02-0.05%, Cr19-21%, Mo1.7-
1.9%, Ni0.5-0.7%, Cu0.2-0.5%, balance of Fe.Chinese invention patent CN 104131219 also discloses a kind of height
Chrome cast iron foundry goods, is made up of following composition and its mass percent：C：3.05-3.1%, Mn：0.76-0.8%, Si：0.6-
0.7%th, Cr：10.6-11%, B：1.2-1.4%, Cu：0.08-0.1%, V：1.2-1.4%, Ni：0.06-0.08%, P：≤
0.02%th, S：≤ 0.02%, balance of Fe.The invention passes through each composition proportion for rationally improving rich chromium cast iron foundry goods, by closing
The processing technique such as the melting of reason, casting, heat treatment, improve the intensity of foundry goods, toughness, wearability, by casting time, sand mold
The control of temperature, prevents the generation of shrinkage porosite, shrinkage cavity, also improves the toughness and wearability of foundry goods, and tensile strength is 480-
500MPa。
Chinese invention patent CN 104131218 also discloses a kind of extra-high chrome cast iron, and each composition and percentage by weight are：
C：2.9-3.0%, Cr：26-27%, Mn：0.8-0.9%, Si：1.05-1.2%, Cu：0.8-0.9%, Ni：0.8—
0.9%th, B：0.003-0.004%, Ti：0.01-0.02%, Re：0.025-0.035%, S：≤ 0.045%, P：≤
0.055%；Balance of Fe.The invention rich chromium cast iron is by the processing work such as rational formula design, melting, rotten, cast, deoxidation
Skill, allow rich chromium cast iron to have good wearability, hardness, intensity, corrosion resistance, toughness, by the duration of pouring, sand mold temperature
Control, effectively prevents the generation of shrinkage porosite, shrinkage cavity, also improves the toughness and wearability of rich chromium cast iron, and case hardness 60-
63HRC, impact value >=7J/cm2.Chinese invention patent CN 103898393 also discloses a kind of high-chromium cast iron-type abrasion-resistant alloy system
Technique is made, the content of alloying element is in following scope in alloy：Chromium 20～40%, carbon 4～7%, titanium 1～4%, molybdenum 1～
4%th, manganese 0.5%, silicon 1%, nickel 1%, the smelting technology include：Step 1, when 1500 DEG C of melting molten steel heating, respectively plus
Enter element：Carbon, molybdenum-iron, nickel, ferrotianium, ferrochrome, then proceed to heat up；Step 2, when melting molten steel is warming up to 1579-1580 DEG C,
Add ferrosilicon；Step 3, when melting molten steel heating, add ferromanganese；Step 4, power-off go out molten steel cast.The invention overcomes existing
The deficiency of technology, process is simple, low cost, obdurability are high, quenching degree and hardenability are good and pollution-free.Chinese invention patent CN
103266261 also disclose a kind of rich chromium cast iron abrasive body and preparation method thereof, abrasive body chemistry by weight percentage
Composition is：C：2.5～2.8%, Si≤0.5%, Mn：0.15～0.25%, Mo：0～2.5%, Cr：15～20%, Al：0.01
～0.8%, Ni：0.05～0.10%, Re：0.1～0.2%, P≤0.05%, S≤0.05%, balance of Fe, the master of the invention
Feature is wanted to be the nano-milled material hardness that effectively combination is obtained using cast grinding ball material formula with Technology for Heating Processing science
HRC >=65, percentage of damage≤0.3%, cast gate center and centre of sphere HRC be poor≤and 1.5, solve high-abrasive material cast grinding ball industry and research and develop
Present in cast grinding ball hardness it is low, poor toughness, corrosion resistance are weak, the low technical barrier of consistency.Chinese invention patent CN
102220541 also disclose a kind of rich chromium cast iron containing SiC powder, the preparation method of the cast iron and with this kind of cast iron materials system
The method for making wear resistance castings, the technical scheme of employing is：A kind of rich chromium cast iron containing SiC powder, it is characterised in that：The SiC
Powder body is 99.9%SiC, and particle mean size is 20-40 nanometers, and SiC powder accounts for the 3-6% of the rich chromium cast iron gross weight, described
Rich chromium cast iron also includes 3.1-3.9%C, 18-22%Cr, 0.5-1.0%Si, 0.6-1.6%Mo, 0.6-1.2%Mn,
0.1-0.4%Ni, 0.04-0.09%V, 0.011-0.031%S, 0.018-0.030%P.Beneficial effect is：1)SiC
Powder body greatly improves the wearability of foundry goods.2) using SiC powder strengthening high chromium cast iron material, resistance to HI high impact friction mill can be formed
The wear-resisting shot blasting device blades of rich chromium cast iron of damage.Therefore, rich chromium cast iron crystal growth shape can both have been changed using SiC nano-powders
Looks, change the growthform of martensite, greatly improve the hardness of material；The friction and abrasion under material at high temperature can be improved again
Can, hence it is evident that play a part of to resist high temperature friction and wear.Chinese invention patent CN102212740 is also disclosed containing VN, TiN powder body
Rich chromium cast iron, the cast iron preparation method and wearing piece, the technical scheme of employing is：A kind of powder body rich chromium cast iron containing VN, TiN, its
It is characterised by：VN, TiN powder body is the VN that purity the is 99.5% and TiN that purity is 99.3%, and the powder body accounts for high chromium casting
Weight percent iron is the TiN of the VN and 2-4% of 2-4%, and the rich chromium cast iron is also including 3.1-3.9%C, 18-22%
Cr, 0.5-1.0%Si, 0.6-1.6%Mo, 0.6-1.2%Mn, 0.1-0.4%Ni, 0.04-0.09%V, 0.011-
The matrix material of 0.031%S, 0.018-0.030%P, balance of ferrum.Beneficial effect is：The beneficial effect of the invention exists
In：VN and TiN powder body can greatly improve the resistance to of foundry goods as rich chromium cast iron molten metal matrix and the forming core core of carbide solidification
Mill property；Strengthen high chromium cast iron material using VN and TiN powder body, the wear-resisting ball blast of resistance to HI high impact fretting wear rich chromium cast iron can be formed
Device blade；VN and TiN powder body serves invigoration effect using addition method in stove, the nano-particle on the one hand adding, on the other hand
What is added in stove is argon, protects molten metal.
But, in above-mentioned rich chromium cast iron, carbide is mainly M7C3Type carbide, in it is thick it is plate-like be distributed in matrix,
Fracture of Material is reduced, additionally, M7C3Type carbide hardness only has 1400～1800HV, under high stress material abrasion industrial and mineral, still
Show hardness it is low and wear no resistance wait deficiency.Although by adding SiC powder, that VN, TiN powder body can improve rich chromium cast iron is wear-resisting
Property, but these powder densities are low, the skewness in rich chromium cast iron liquation, easily float over metal iron liquid surface, cause high chromium casting
Ferrum property fluctuation is too big, wears no resistance.
The content of the invention
The present invention can generate graininess using carbon and vanadium to solve prior art problem, and hardness up to 2600～
The VC of 2800HV is improving wear resistance of high-chromium iron.Additionally, vanadium also refines M7C3The ability of type carbide, is improving high chromium casting
On the premise of ferrum hardness and wearability, it is expected to improve rich chromium cast iron intensity and toughness.
The object of the invention can be realized by following technical matters measure.
The preparation method of ferrum-vanadium-chromium antifriction alloy, it is characterised in that comprise the following steps：
1. the melting medium chrome cast iron molten iron first in electric furnace, the chemical composition and mass fraction of medium chrome cast iron molten iron are 3.8-
4.0%C, 8.5-9.0%Cr, 2.1-2.4%Mn, 1.0-1.2%Ni, 0.8-1.0%Mo, 1.6-1.8%Nb, 0.5-0.8%
Si, 0.035-0.065%Al,<0.04%S,<0.04%P, surplus Fe, when medium chrome cast iron molten iron temperature rises to 1620-1645 DEG C
When, add size to be 30-45mm and be heated to 1100-1150 DEG C in heating in vacuum electric furnace and be incubated the vanadium of 2.0-3.5 hours
Iron particle, vanadium iron particle loads account for the 10-12% of medium chrome cast iron molten steel quality fraction in stove, and vanadium iron granule adds 4-6 in stove
After minute, addition accounts for the Si-Ba-Ca alloy of molten metal mass fraction 0.35-0.50% in stove, when molten metal temperature reaches
When 1580-1605 DEG C, above-mentioned molten metal is come out of the stove to casting ladle, and during molten metal is come out of the stove, is added with molten metal stream
Enter the vanadium iron granule that size is 18-25mm, vanadium iron particle loads account for the 0.8- of the molten metal mass fraction in casting ladle
1.0%；
2. the molten metal in casting ladle is skimmed, when temperature is down to 1430-1455 DEG C, molten metal is poured into into casting mold, gold
Category liquation casting process in, with molten metal stream add particle size 3-6mm ferrovanadium nitride and ferrotianium, ferrovanadium nitride granule and
Ferrotitanium particle addition accounts for the 0.15-0.25% and 0.10-0.18% of the molten metal mass fraction in casting mold, foundry goods respectively
After being poured 2-4 hours, unpack and take out foundry goods, Jing after polishing sand removal, enter stove heat to 180-210 DEG C, be incubated 18-20 hours
After come out of the stove and be air cooled to room temperature, you can obtain ferrum-vanadium-chromium antifriction alloy.
The chemical composition and mass fraction of vanadium iron is as mentioned above:78.0-83.0%V,<2.0%Si,<1.5%Al,<
0.06%C,<0.05%S,<0.05%P, balance of Fe and inevitable impurity.
The chemical composition and mass fraction of Si-Ba-Ca alloy is as mentioned above:65.0-70.0%Si, 1.5-3.0%Ca,
4.5-6.0%Ba, C<0.20%, balance of Fe and inevitable impurity.
The chemical composition and mass fraction of ferrotianium is as mentioned above：38-42%Ti,<5.0%Al,<2.5%Si,<
0.02%P,<0.20%Cu,<0.10%C,<0.02%S,<2.5%Mn, surplus Fe.
The chemical composition and mass fraction of ferrovanadium nitride is as mentioned above：53-58%V, 10-12%N,<0.6%C,<
2.5%Si,<0.08%P,<0.05%S,<2.0%Al, surplus Fe.
Present invention melting medium chrome cast iron molten iron first in electric furnace, the chemical composition and mass fraction of medium chrome cast iron molten iron are
3.8-4.0%C, 8.5-9.0%Cr, 2.1-2.4%Mn, 1.0-1.2%Ni, 0.8-1.0%Mo, 1.6-1.8%Nb, 0.5-
0.8%Si, 0.035-0.065%Al,<0.04%S,<0.04%P, surplus Fe.Then medium chrome cast iron molten iron temperature is risen to
When 1620-1645 DEG C, size is added to be 30-45mm and 1100-1150 DEG C is heated in vacuum furnace and 2.0-3.5 is incubated
The vanadium iron granule of hour, vanadium iron particle loads account for the 10-12% of medium chrome cast iron molten steel quality fraction in stove, so can ensure that vanadium
Element is fully absorbed, and is greatly reduced the scaling loss of v element, improves v element recovery rate.Vanadium iron granule adds 4-6 in stove
After minute, addition accounts for the Si-Ba-Ca alloy of molten metal mass fraction 0.35-0.50% in stove, when molten metal temperature reaches
When 1580-1605 DEG C, above-mentioned molten metal is come out of the stove to casting ladle.And during molten metal is come out of the stove, add with molten metal stream
Enter the vanadium iron granule that size is 18-25mm, vanadium iron particle loads account for the 0.8- of the molten metal mass fraction in casting ladle
1.0%, current-following inoculation process is carried out to molten metal using vanadium iron granule, ferrum-vanadium-chromium can be improved resistance to thinning solidification structure
The combination property of break-in gold.On this basis, the molten metal in casting ladle is skimmed, when temperature is down to 1430-1455 DEG C, by gold
Category liquation pours into casting mold, in molten metal casting process, adds the ferrovanadium nitride and titanium of particle size 3-6mm with molten metal stream
Ferrum, ferrovanadium nitride granule and Ferrotitanium particle addition account for the 0.15-0.25% of the molten metal mass fraction in casting mold respectively
And 0.10-0.18%, so can further thinning solidification structure, and promote VC to realize that nodular is uniformly distributed, significantly carry
High ferro-vanadium-chromium antifriction alloy mechanical property and wearability.After casting pouring finishes 2-4 hours, unpack and take out foundry goods, Jing polishings
After sand removal, enter stove heat to 180-210 DEG C, come out of the stove after insulation 18-20 hours and be air cooled to room temperature, realize removing casting stress, obtain
Obtain high performance ferrum-vanadium-chromium antifriction alloy.
The present invention has advantages below compared with prior art：
1) material of the present invention obtains martensitic matrix under as cast condition because adding while vanadium chromium, and hardness of cast form reaches 66-
68HRC, under as cast condition, lonneal can just be applied, and eliminate the high-temperature heat treatment process of complexity, the production cycle is greatly shortened,
Energy saving；
2) VC containing a large amount of high rigidity in material of the present invention, with excellent anti-wear performance, in high stress material abrasion
Under the conditions of, wearability improves more than 2 times than rich chromium cast iron.
Description of the drawings
Fig. 1 ferrum-vanadium of the present invention-chromium antifriction alloy metallographic microstructure photo.
Specific embodiment
With reference to embodiments the present invention is further described, but the present invention is not limited to following examples.
Embodiment 1：
Material of the present invention adopts 500 kilograms of medium-frequency induction furnace meltings, and concrete step of preparation process is：
1. melting medium chrome cast iron molten iron, the chemical composition of medium chrome cast iron molten iron first in 500 kilograms of medium-frequency induction furnaces
And mass fraction is 3.84%C, 8.51%Cr, 2.38%Mn, 1.05%Ni, 0.98%Mo, 1.62%Nb, 0.77%Si,
0.041%Al, 0.025%S, 0.039%P, surplus Fe, when medium chrome cast iron molten iron temperature rises to 1621 DEG C, addition size is
30-45mm and 1150 DEG C and the vanadium iron (chemical composition and quality of vanadium iron for being incubated 2.0 hours are heated in heating in vacuum electric furnace
Fraction is:79.07%V, 1.08%Si, 0.75%Al, 0.04%C, 0.028%S, 0.039%P, balance of Fe and can not keep away
Exempt from impurity) granule, vanadium iron particle loads account for 10% of medium chrome cast iron molten steel quality fraction in stove, 4 in vanadium iron granule addition stove
After minute, addition accounts for the Si-Ba-Ca alloy (chemical composition and matter of Si-Ba-Ca alloy of molten metal mass fraction 0.50% in stove
Measuring fraction is:65.39%Si, 1.52%Ca, 5.87%Ba, 0.11%C, balance of Fe and inevitable impurity), when metal melts
When liquid temp reaches 1584 DEG C, above-mentioned molten metal is come out of the stove to casting ladle, and during molten metal is come out of the stove, with molten metal
Stream adds size, and for the vanadium iron of 18-25mm, (chemical composition and mass fraction of vanadium iron be:79.07%V, 1.08%Si, 0.75%
Al, 0.04%C, 0.028%S, 0.039%P, balance of Fe and inevitable impurity) granule, vanadium iron particle loads account for entrance
The 1.0% of molten metal mass fraction in casting ladle；
2. the molten metal in casting ladle is skimmed, when temperature is down to 1433 DEG C, molten metal is poured into into casting mold, molten metal
In casting process, the ferrovanadium nitride (chemical composition and quality of ferrovanadium nitride point of particle size 3-6mm is added with molten metal stream
Number is：54.89%V, 10.27%N, 0.38%C, 1.68%Si, 0.049%P, 0.026%S, 1.15%Al, surplus Fe) and
(chemical composition and mass fraction of ferrotianium be ferrotianium：39.04%Ti, 2.81%Al, 1.36%Si, 0.011%P, 0.09%
Cu, 0.06%C, 0.008%S, 1.52%Mn, surplus Fe), ferrovanadium nitride granule and Ferrotitanium particle addition are accounted for respectively into casting
The 0.15% and 0.18% of molten metal mass fraction in type, after casting pouring finishes 4 hours, unpacks and takes out foundry goods, Jing polishings
After sand removal, enter stove heat to 210 DEG C, insulation is come out of the stove after 18 hours and is air cooled to room temperature, you can obtain ferrum-vanadium-chromium antifriction alloy, its
Mechanical property is shown in Table 1.
Embodiment 2：
Material of the present invention adopts 750 kilograms of medium-frequency induction furnace meltings, and concrete step of preparation process is：
1. melting medium chrome cast iron molten iron, the chemical composition of medium chrome cast iron molten iron first in 750 kilograms of medium-frequency induction furnaces
And mass fraction is 3.99%C, 8.96%Cr, 2.10%Mn, 1.17%Ni, 0.83%Mo, 1.78%Nb, 0.51%Si,
0.064%Al, 0.028%S, 0.033%P, surplus Fe, when medium chrome cast iron molten iron temperature rises to 1644 DEG C, addition size is
30-45mm and 1100 DEG C and the vanadium iron (chemical composition and quality of vanadium iron for being incubated 3.5 hours are heated in heating in vacuum electric furnace
Fraction is:82.34%V, 0.96%Si, 0.83%Al, 0.03%C, 0.026%S, 0.041%P, balance of Fe and can not keep away
Exempt from impurity) granule, vanadium iron particle loads account for 12% of medium chrome cast iron molten steel quality fraction in stove, 6 in vanadium iron granule addition stove
After minute, addition accounts for the Si-Ba-Ca alloy (chemical composition and matter of Si-Ba-Ca alloy of molten metal mass fraction 0.35% in stove
Measuring fraction is:69.62%Si, 2.88%Ca, 4.51%Ba, 0.09%C, balance of Fe and inevitable impurity), when metal melts
When liquid temp reaches 1602 DEG C, above-mentioned molten metal is come out of the stove to casting ladle, and during molten metal is come out of the stove, with molten metal
Stream adds size, and for the vanadium iron of 18-25mm, (chemical composition and mass fraction of vanadium iron be:82.34%V, 0.96%Si, 0.83%
Al, 0.03%C, 0.026%S, 0.041%P, balance of Fe and inevitable impurity) granule, vanadium iron particle loads account for entrance
The 0.8% of molten metal mass fraction in casting ladle；
2. the molten metal in casting ladle is skimmed, when temperature is down to 1452 DEG C, molten metal is poured into into casting mold, molten metal
In casting process, the ferrovanadium nitride (chemical composition and quality of ferrovanadium nitride point of particle size 3-6mm is added with molten metal stream
Number is：57.63%V, 11.82%N, 0.41%C, 2.06%Si, 0.055%P, 0.029%S, 1.07%Al, surplus Fe) and
(chemical composition and mass fraction of ferrotianium be ferrotianium：41.38%Ti, 4.09%Al, 1.74%Si, 0.017%P, 0.12%
Cu, 0.052%C, 0.009%S, 1.26%Mn, surplus Fe), ferrovanadium nitride granule and Ferrotitanium particle addition account for entrance respectively
The 0.25% and 0.10% of molten metal mass fraction in casting mold, after casting pouring finishes 2 hours, unpacks and takes out foundry goods, and Jing beats
After mill sand removal, enter stove heat to 180 DEG C, insulation is come out of the stove after 20 hours and is air cooled to room temperature, you can obtain ferrum-vanadium-chromium antifriction alloy,
Its mechanical property is shown in Table 1.
Embodiment 3：
Material of the present invention adopts 500 kilograms of medium-frequency induction furnace meltings, and concrete step of preparation process is：
1. melting medium chrome cast iron molten iron, the chemical composition of medium chrome cast iron molten iron first in 500 kilograms of medium-frequency induction furnaces
And mass fraction is 3.95%C, 8.72%Cr, 2.26%Mn, 1.13%Ni, 0.94%Mo, 1.70%Nb, 0.68%Si,
0.055%Al, 0.016%S, 0.029%P, surplus Fe, when medium chrome cast iron molten iron temperature rises to 1634 DEG C, addition size is
30-45mm and 1125 DEG C and the vanadium iron (chemical composition and quality of vanadium iron for being incubated 3.0 hours are heated in heating in vacuum electric furnace
Fraction is:81.20%V, 1.12%Si, 0.67%Al, 0.04%C, 0.029%S, 0.038%P, balance of Fe and can not keep away
Exempt from impurity) granule, vanadium iron particle loads account for 11% of medium chrome cast iron molten steel quality fraction in stove, 5 in vanadium iron granule addition stove
After minute, addition accounts for the Si-Ba-Ca alloy (chemical composition and matter of Si-Ba-Ca alloy of molten metal mass fraction 0.40% in stove
Measuring fraction is:68.01%Si, 1.97%Ca, 5.26%Ba, 0.14%C, balance of Fe and inevitable impurity), when metal melts
When liquid temp reaches 1597 DEG C, above-mentioned molten metal is come out of the stove to casting ladle, and during molten metal is come out of the stove, with molten metal
Stream adds size, and for the vanadium iron of 18-25mm, (chemical composition and mass fraction of vanadium iron be:81.20%V, 1.12%Si, 0.67%
Al, 0.04%C, 0.029%S, 0.038%P, balance of Fe and inevitable impurity) granule, vanadium iron particle loads account for entrance
The 0.9% of molten metal mass fraction in casting ladle；
2. the molten metal in casting ladle is skimmed, when temperature is down to 1439 DEG C, molten metal is poured into into casting mold, molten metal
In casting process, the ferrovanadium nitride (chemical composition and quality of ferrovanadium nitride point of particle size 3-6mm is added with molten metal stream
Number is：56.24%V, 11.21%N, 0.38%C, 1.60%Si, 0.064%P, 0.031%S, 1.28%Al, surplus Fe) and
(chemical composition and mass fraction of ferrotianium be ferrotianium：40.14%Ti, 2.99%Al, 1.76%Si, 0.015%P, 0.17%
Cu, 0.057%C, 0.008%S, 1.99%Mn, surplus Fe), ferrovanadium nitride granule and Ferrotitanium particle addition account for entrance respectively
The 0.20% and 0.15% of molten metal mass fraction in casting mold, after casting pouring finishes 3 hours, unpacks and takes out foundry goods, and Jing beats
After mill sand removal, enter stove heat to 200 DEG C, insulation is come out of the stove after 19 hours and is air cooled to room temperature, you can obtain ferrum-vanadium-chromium antifriction alloy,
Its mechanical property is shown in Table 1.
1 ferrum of table-vanadium-chromium antifriction alloy mechanical property
| Mechanical property | Hardness/HRC | Impact flexibility/J.cm-2 | Bending strength/MPa |
| Embodiment 1 | 67.9 | 8.75 | 1210 |
| Embodiment 2 | 67.2 | 9.34 | 1260 |
| Embodiment 3 | 66.5 | 9.08 | 1245 |
Ferrum-vanadium-chromium antifriction alloy of the present invention obtains martensitic matrix under as cast condition because adding while vanadium chromium, and as cast condition is hard
Degree reaches 66-68HRC, and under as cast condition, lonneal can just be applied, and eliminates the high-temperature heat treatment process of complexity, is greatly shortened
Production cycle, energy saving.Gained ferrum-vanadium-chromium antifriction alloy metallographic microstructure photo can refer to Fig. 1.Ferrum-vanadium of the present invention-
In chromium antifriction alloy, the VC containing a large amount of high rigidity, with excellent anti-wear performance, enterprising in MM-2000 ring block abrasion testers
Row contrast wear test, specimen size is 10mm × 10mm × 15mm, and using GCr15 to bull ring, load is 60kg, each sample
Abrasion 30min, under identical abrasion industrial and mineral, ferrum-vanadium-chromium antifriction alloy wearability of the present invention improves more than 2 times than rich chromium cast iron, tool
There is good popularizing application prospect.
Claims (2)
1. a kind of preparation method of ferrum-vanadium-chromium antifriction alloy, it is characterised in that comprise the following steps：
1. the melting medium chrome cast iron molten iron first in electric furnace, the chemical composition and mass fraction of medium chrome cast iron molten iron are 3.8-
4.0%C, 8.5-9.0%Cr, 2.1-2.4%Mn, 1.0-1.2%Ni, 0.8-1.0%Mo, 1.6-1.8%Nb, 0.5-0.8%
Si, 0.035-0.065%Al,<0.04%S,<0.04%P, surplus Fe, when medium chrome cast iron molten iron temperature rises to 1620-1645 DEG C
When, add size to be 30-45mm and be heated to 1100-1150 DEG C in heating in vacuum electric furnace and be incubated the vanadium of 2.0-3.5 hours
Iron particle, vanadium iron particle loads account for the 10-12% of medium chrome cast iron molten steel quality fraction in stove, and vanadium iron granule adds 4-6 in stove
After minute, addition accounts for the Si-Ba-Ca alloy of molten metal mass fraction 0.35-0.50% in stove, when molten metal temperature reaches
When 1580-1605 DEG C, above-mentioned molten metal is come out of the stove to casting ladle, and during molten metal is come out of the stove, is added with molten metal stream
Enter the vanadium iron granule that size is 18-25mm, vanadium iron particle loads account for the 0.8- of the molten metal mass fraction in casting ladle
1.0%；
2. the molten metal in casting ladle is skimmed, when temperature is down to 1430-1455 DEG C, molten metal is poured into into casting mold, metal melts
In liquid casting process, the ferrovanadium nitride and ferrotianium, ferrovanadium nitride granule and ferrotianium of particle size 3-6mm are added with molten metal stream
Particle loads account for the 0.15-0.25% and 0.10-0.18% of the molten metal mass fraction in casting mold, casting pouring respectively
After finishing 2-4 hours, unpack and take out foundry goods, Jing after polishing sand removal, enter stove heat to 180-210 DEG C, go out after insulation 18-20 hours
Stove is air cooled to room temperature, you can obtain ferrum-vanadium-chromium antifriction alloy；
The chemical composition and mass fraction of the vanadium iron be:78.0-83.0%V,<2.0%Si,<1.5%Al,<0.06%C,<
0.05%S,<0.05%P, balance of Fe and inevitable impurity；
The chemical composition and mass fraction of the Si-Ba-Ca alloy be:65.0-70.0%Si, 1.5-3.0%Ca, 4.5-6.0%
Ba,C<0.20%, balance of Fe and inevitable impurity；
The chemical composition and mass fraction of the ferrotianium be：38-42%Ti,<5.0%Al,<2.5%Si,<0.02%P,<
0.20%Cu,<0.10%C,<0.02%S,<2.5%Mn, surplus Fe；
The chemical composition and mass fraction of the ferrovanadium nitride be：53-58%V, 10-12%N,<0.6%C,<2.5%Si,<
0.08%P,<0.05%S,<2.0%Al, surplus Fe.
2. ferrum-vanadium-chromium the antifriction alloy for preparing according to the method for claim 1.
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| JPS6357746A (en) * | 1986-05-28 | 1988-03-12 | ウッデホルム トウーリング アクツイエボラーグ | Alloyed steel material, die block and other forged and cast product produced therefrom and production of alloyed steel material |
| CN1624181A (en) * | 2004-12-15 | 2005-06-08 | 宁波浙东精密铸造有限公司 | Strongtough high gilicon cast steel and its manufacturing method |
| CN1916219A (en) * | 2006-09-05 | 2007-02-21 | 郑州航空工业管理学院 | High carbon high-speed steel of containing granular carbide, and preparation method |
| US7935198B2 (en) * | 2005-02-11 | 2011-05-03 | The Nanosteel Company, Inc. | Glass stability, glass forming ability, and microstructural refinement |
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|---|---|---|---|---|
| JPS6357746A (en) * | 1986-05-28 | 1988-03-12 | ウッデホルム トウーリング アクツイエボラーグ | Alloyed steel material, die block and other forged and cast product produced therefrom and production of alloyed steel material |
| CN1624181A (en) * | 2004-12-15 | 2005-06-08 | 宁波浙东精密铸造有限公司 | Strongtough high gilicon cast steel and its manufacturing method |
| US7935198B2 (en) * | 2005-02-11 | 2011-05-03 | The Nanosteel Company, Inc. | Glass stability, glass forming ability, and microstructural refinement |
| CN1916219A (en) * | 2006-09-05 | 2007-02-21 | 郑州航空工业管理学院 | High carbon high-speed steel of containing granular carbide, and preparation method |
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