CN106222578A - A kind of ferrum body spheroidal graphite cast-iron steel forging difficult to understand - Google Patents
A kind of ferrum body spheroidal graphite cast-iron steel forging difficult to understand Download PDFInfo
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- CN106222578A CN106222578A CN201610798119.7A CN201610798119A CN106222578A CN 106222578 A CN106222578 A CN 106222578A CN 201610798119 A CN201610798119 A CN 201610798119A CN 106222578 A CN106222578 A CN 106222578A
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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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
- C22C38/12—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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
Abstract
The invention discloses a kind of ferrum body spheroidal graphite cast-iron steel forging difficult to understand, its component includes by weight percentage: C:0.3～0.6%, Si:0.2～0.4%, B:0.08～0.12%, V:0.15～0.25%, Ni:0.1～0.12%, Mo:0.15～0.18%, Nb:0.08～0.12%, Al:0.1～0.3%, Cr:2.8～3.2%, Zr:0.1～0.15%, Sr:0.02～0.05%, Ce:0.03～0.06%, S≤0.015%, P≤0.02%, surplus is Fe.The ferrum body spheroidal graphite cast-iron steel difficult to understand forging that the present invention proposes, anti-wear performance and tenacity excellent, hardness is up to 48HRC, and impact strength is up to 43J/cm2, contact fatigue property is good, and service life is long.
Description
Technical field
The present invention relates to technical field, particularly relate to a kind of ferrum body spheroidal graphite cast-iron steel forging difficult to understand.
Background technology
At present, austenite ductile cast iron steel is forged under the conditions of thump abrasive wear, has the abrasion resistance of excellence, therefore extensively
It is applied to each departments such as railway, mine, thermoelectricity, chemical industry, agricultural machinery and military project.But it is fine to there is austenite plasticity in austenite, by force
Spend the features such as relatively low, always used based on as cast condition roughing form since it puts into industrial applicability, limit it right
The wear-resisting operating mode field that form accuracy re-uses after requiring and needing machining.Therefore need design one badly and there is high rigidity
The ferrum body spheroidal graphite cast-iron steel difficult to understand forging of high impact solves the problems of the prior art.
Summary of the invention
The technical problem existed based on background technology, the present invention proposes a kind of ferrum body spheroidal graphite cast-iron steel forging difficult to understand, wearability
Energy and tenacity excellent, hardness is up to 48HRC, and impact strength is up to 43J/cm2, contact fatigue property is good, and service life is long.
A kind of difficult to understand ferrum body spheroidal graphite cast-iron steel forging that the present invention proposes, its component includes by weight percentage: C:0.3～
0.6%, Si:0.2～0.4%, B:0.08～0.12%, V:0.15～0.25%, Ni:0.1～0.12%, Mo:0.15～
0.18%, Nb:0.08～0.12%, Al:0.1～0.3%, Cr:2.8～3.2%, Zr:0.1～0.15%, Sr:0.02～
0.05%, Ce:0.03～0.06%, S≤0.015%, P≤0.02%, surplus is Fe.
Preferably, C element, Si element, the content of Sr element meet following relation: 100 × nC=100 × (nSi+nSr)×
0.2+0.4, wherein nC、nSi、nSrRepresent C element, Si element, Sr element shared weight percent in the component of alterant respectively
Ratio.
Preferably, its component includes by weight percentage: C:0.4～0.5%, Si:0.25～0.35%, B:0.09～
0.11%, V:0.18～0.22%, Ni:0.105～0.115%, Mo:0.16～0.17%, Nb:0.09～0.11%, Al:
0.15～0.25%, Cr:2.9～3.1%, Zr:0.11～0.13%, Sr:0.03～0.04%, Ce:0.03～0.06%, S
≤ 0.015%, P≤0.02%, surplus is Fe.
Preferably, V element, Ni element, Mo element, Nb element, Al element, Cr element, the weight ratio of Zr element are 2:
1.1:1.65:1:2:30:1.2.
Preferably, its component includes by weight percentage: C:0.45%, Si:0.3%, B:0.1%, V:0.2%, Ni:
0.11%, Mo:0.165%, Nb:0.1%, Al:0.2%, Cr:3%, Zr:0.12%, Sr:0.035%, Ce:0.45%, S≤
0.015%, P≤0.02%, surplus is Fe.
In the present invention, each element interaction is as follows:
Carbon (C): as forming the essential element of graphite nodule, can effectively control graphite number and graphite size, meanwhile,
Suitable carbon equivalent can make ferrum liquid readily flowed, increases the mold-filling capacity of ferrum liquid, reduces Shrinkage cavity, improves the densification of foundry goods
Property, but carbon content is too high, easily produces graphite floatation, affects the performance of cast iron, also can reduce the atmospheric corrosion resistance ability of steel,
Increase cold brittleness and the aging sensitivity of steel.
Silicon (Si): as strongly facilitating graphited element, the effect bred can be played again.Higher silicon content is to foundry goods
Cast and have the biggest benefit from feeding, the elastic limit of steel, yield point and tensile strength can be significantly improved.Silicone content is high
A bit, to being formed, globular graphite is favourable, but silicone content more than 3.0% time, impact flexibility can drastically reduce, moreover it is possible to reduces the welding of steel
Performance.Silicon and molybdenum, tungsten, chromium etc. combine, and are improved corrosion resistance and antioxidative effect.
Boron (B): boron Main Function in steel is to increase the quenching degree of steel, thus saves other diluter expensive metals；Steel
The boron of middle addition trace just can improve compactness and the hot rolling performance of steel, improves intensity；Boron and nitrogen and oxygen have strong affinity, boiling
Rise the boron adding 0.007% in steel, the aging phenomenon of steel can be eliminated.
Vanadium (V): as the excellent deoxidizer of steel, can thinning microstructure crystal grain, improve intensity and toughness.The carbon that vanadium is formed with carbon
Compound, can improve resistant to hydrogen corrosive power at high temperature under high pressure.
Nickel (Ni): improving while hardness of steel, to the infringement of the performance of toughness, plasticity and other techniques of steel relatively its
His impact of alloying element is little；For medium carbon steel, owing to nickel reduces perlitic transformation temperature, pearlite is made to attenuate；Again due to nickel
Reduce the phosphorus content of eutectoid point, thus with the carbon steel ratio of identical carbon content, make the intensity carbon compared with same carbon content of nickel steel
Element steel is high；Steel can also be improved and to tired drag and reduce the steel sensitivity to breach；The acid and alkali-resistance energy of steel can be improved simultaneously
Power, has resistance to corrosion to air and salt.
Molybdenum (Mo): energy crystal grain thinning, improves quenching degree and thermostrength, keeps enough intensity and creep resistant when high temperature
Ability, improves mechanical performance；The fragility that steel alloy causes can also be suppressed due to fire.
Niobium (Nb): can partly dissolve in solid solution, plays solution strengthening effect；The through hardening of steel is significantly improved when dissolving in austenite
Property；Steel belt roof bolt stability can be increased, have post-curing effect.Trace niobium can be in the situation of the plasticity or toughness not affecting steel
The intensity of lower raising steel；Owing to having the effect of crystal grain thinning, the impact flexibility of steel can be improved and reduce its brittle transition temperature；
When content is more than 8 times of carbon, almost can fix all of carbon in steel, make steel have good resistant to hydrogen performance；At austenite
Steel is possible to prevent the oxide isolation intercrystalline corrosion to steel；Due to fixed carbon and precipitation-hardening effect, the height of refractory steel can be improved
Warm nature energy, such as creep strength etc..
Aluminum (Al): as deoxidizer conventional in steel, can crystal grain thinning, improve impact flexibility, also have non-oxidizability and
Corrosion resistance, share high temperature non-scale performance and the ability of high-temperature corrosion resistance being remarkably improved steel with chromium, silicon；But can affect
The hot-working character of steel, welding performance and machinability.
Chromium (Cr): can improve quenching degree, can significantly improve intensity, hardness and wearability, moreover it is possible to improve the non-oxidizability of steel
And corrosion resistance, but plasticity and toughness can be reduced, and also it is carbide former simultaneously, in spheroidal graphite cast-iron, it can be raw with carbon
Become M3C-type carbide as effective Hard Inclusion Dispersed precipitate on matrix, can improve hardness and the abrasion resistance of material.Through examination
Issuing after examination and approval existing confirmation: containing Cr0.5%, carbide accounts for 15～20%, meets actual demand.
Zirconium (Zr): as carbide, the effect in steel and niobium, tantalum, vanadium are similar, can deaerate, purify
And the cryogenic property of crystal grain thinning, beneficially steel, improve punching performance.
Strontium (Sr): during often the composition as inovulant adds steel forging, can promote that carrying out graphitization in steel forging reduces spoken parts in traditional operas
Tendency, improves graphite form and distribution situation, increases eutectic cell quantity, refines matrix.
Yttrium (Y): affect the type of nonmetallic inclusionsin steel, quantity and form, purifies steel, decreases Al2O3To fatigue
The harm of performance, the most highly advantageous to high cycle fatigue and low-cycle fatigue, promote the structural transformation in steel, can be adsorbed on and growing up
Solid-state nucleating surface, forms thin enriched layer, drops low-surface-energy, hinders crystal growth, thus reduces crystal growth rate, carefully
Change skeleton, suppress column crystals growth, and then reduce dendritic segregation and regional segregation, crystal grain thinning, suppress temper brittleness,
Improve the thermoplasticity of steel, heat resistance, fatigue behaviour, wearability, resistant to hydrogen embrittlement, non-oxidizability.
The preparation technology of the present invention is as follows: after raw materials melt, is warming up to 1600～1680 DEG C, is incubated 2～3h, then rises
Temperature, to 1700～1800 DEG C, is incubated 20～30min, then uses and pour method and carry out spheroidising, be then cooled to 1500～
Pour into a mould for 1550 DEG C, casting process carries out inoculation, be cooled to 200～220 DEG C of unpacking peelings, then carry out
Stress-relieving by beat treatment obtains ferrum body spheroidal graphite cast-iron steel forging difficult to understand.
The anti-wear performance of gained Austria of the present invention ferrum body spheroidal graphite cast-iron steel forging and tenacity excellent, hardness is high, contact fatigue property
Well, service life is long；Carbon, element silicon, strontium element are solid-solution in austenite, reduce Carbon diffusion speed, thus prolong
The transformation of slow austenite, hinders the movement of crystal boundary and growing up of crystal grain in austenitization, has refined the crystalline substance of austenite
Grain, is greatly improved the toughness of the present invention, hardness, anti-wear performance and contact fatigue property；V element, nickel element, molybdenum element, niobium unit
Element, aluminium element, chromium element, zr element cooperate, the oxygen element in the removing present invention, and crystal grain thinning improves impact flexibility, and
And cast iron eutectoid transformation temperature can be improved, it is therefore prevented that graphitization is decomposed, and improves steel forging mechanical property in hot environment and corrosion resistant
Erosion ability, improves the service life of steel forging, meets the high request to steel forging in actual production process.
The hardness of gained Austria of the present invention ferrum body spheroidal graphite cast-iron steel forging is 48HRC, and impact strength is up to 43J/cm2。
Detailed description of the invention
Below, by specific embodiment, technical scheme is described in detail.
Embodiment 1
The ferrum body spheroidal graphite cast-iron steel forging a kind of difficult to understand that the present invention proposes, its component includes by weight percentage: C:0.3%, Si:
0.4%, B:0.08%, V:0.25%, Ni:0.1%, Mo:0.18%, Nb:0.08%, Al:0.3%, Cr:2.8%, Zr:
0.15%, Sr:0.02%, Ce:0.06%, S≤0.015%, P≤0.02%, surplus is Fe.
Embodiment 2
The ferrum body spheroidal graphite cast-iron steel forging a kind of difficult to understand that the present invention proposes, its component includes by weight percentage: C:0.6%, Si:
0.2%, B:0.12%, V:0.15%, Ni:0.12%, Mo:0.15%, Nb:0.12%, Al:0.1%, Cr:3.2%, Zr:
0.1%, Sr:0.05%, Ce:0.03%, S≤0.015%, P≤0.02%, surplus is Fe.
Embodiment 3
The ferrum body spheroidal graphite cast-iron steel forging a kind of difficult to understand that the present invention proposes, its component includes by weight percentage: C:0.458%,
Si:0.25%, B:0.11%, V:0.18%, Ni:0.115%, Mo:0.16%, Nb:0.11%, Al:0.15%, Cr:
3.1%, Zr:0.11%, Sr:0.04%, Ce:0.03%, S≤0.015%, P≤0.02%, surplus is Fe.
Embodiment 4
The ferrum body spheroidal graphite cast-iron steel forging a kind of difficult to understand that the present invention proposes, its component includes by weight percentage: C:0.476%,
Si:0.35%, B:0.09%, V:0.22%, Ni:0.105%, Mo:0.17%, Nb:0.09%, Al:0.25%, Cr:
2.9%, Zr:0.13%, Sr:0.03%, Ce:0.06%, S≤0.015%, P≤0.02%, surplus is Fe.
Embodiment 5
The ferrum body spheroidal graphite cast-iron steel forging a kind of difficult to understand that the present invention proposes, its component includes by weight percentage: C:0.45%,
Si:0.3%, B:0.1%, V:0.2%, Ni:0.11%, Mo:0.165%, Nb:0.1%, Al:0.2%, Cr:3%, Zr:
0.12%, Sr:0.035%, Ce:0.45%, S≤0.015%, P≤0.02%, surplus is Fe.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope that the invention discloses, according to technical scheme and
Inventive concept equivalent or change in addition, all should contain within protection scope of the present invention.
Claims (5)
1. a ferrum body spheroidal graphite cast-iron steel difficult to understand forging, it is characterised in that its component includes by weight percentage: C:0.3～0.6%,
Si:0.2～0.4%, B:0.08～0.12%, V:0.15～0.25%, Ni:0.1～0.12%, Mo:0.15～0.18%,
Nb:0.08～0.12%, Al:0.1～0.3%, Cr:2.8～3.2%, Zr:0.1～0.15%, Sr:0.02～0.05%,
Ce:0.03～0.06%, S≤0.015%, P≤0.02%, surplus is Fe.
Ferrum body spheroidal graphite cast-iron steel forging the most difficult to understand, it is characterised in that C element, Si element, the containing of Sr element
Amount meets following relation: 100 × nC=100 × (nSi+nSr) × 0.2+0.4, wherein nC、nSi、nSrRepresent C element, Si unit respectively
Element, Sr element be shared percentage by weight in the component of alterant.
Ferrum body spheroidal graphite cast-iron steel forging difficult to understand the most according to claim 1 or claim 2, it is characterised in that its component is wrapped by weight percentage
Include: C:0.4～0.5%, Si:0.25～0.35%, B:0.09～0.11%, V:0.18～0.22%, Ni:0.105～
0.115%, Mo:0.16～0.17%, Nb:0.09～0.11%, Al:0.15～0.25%, Cr:2.9～3.1%, Zr:0.11
～0.13%, Sr:0.03～0.04%, Ce:0.03～0.06%, S≤0.015%, P≤0.02%, surplus is Fe.
4. according to ferrum body spheroidal graphite cast-iron steel forging difficult to understand described in any one of claims 1 to 3, it is characterised in that V, Ni, Mo, Nb, Al,
The weight ratio of Cr, Zr is 2:1.1:1.65:1:2:30:1.2.
5. according to ferrum body spheroidal graphite cast-iron steel forging difficult to understand described in any one of Claims 1 to 4, it is characterised in that its component by weight hundred
Proportion by subtraction includes: C:0.45%, Si:0.3%, B:0.1%, V:0.2%, Ni:0.11%, Mo:0.165%, Nb:0.1%, Al:
0.2%, Cr:3%, Zr:0.12%, Sr:0.035%, Ce:0.45%, S≤0.015%, P≤0.02%, surplus is Fe.
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Citations (6)
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|---|---|---|---|---|
| JPH0633189A (en) * | 1992-07-14 | 1994-02-08 | Sumitomo Metal Ind Ltd | Spring steel excellent in delayed fracture resistance |
| JP2004027305A (en) * | 2002-06-26 | 2004-01-29 | Daido Steel Co Ltd | Case hardening member for rolling part |
| CN102337452A (en) * | 2011-11-09 | 2012-02-01 | 中南大学 | Low-alloy heat-resisting cast iron and preparation method thereof |
| CN105624569A (en) * | 2016-02-23 | 2016-06-01 | 安徽省宁国顺昌机械有限公司 | High-abrasion bearing |
| CN105673706A (en) * | 2016-02-23 | 2016-06-15 | 安徽省宁国顺昌机械有限公司 | Wear-resistant and corrosion-resistant bearing |
| CN105757124A (en) * | 2016-02-23 | 2016-07-13 | 安徽省宁国顺昌机械有限公司 | High-toughness and high-rigidity rolling bearing |
-
2016
- 2016-08-31 CN CN201610798119.7A patent/CN106222578A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0633189A (en) * | 1992-07-14 | 1994-02-08 | Sumitomo Metal Ind Ltd | Spring steel excellent in delayed fracture resistance |
| JP2004027305A (en) * | 2002-06-26 | 2004-01-29 | Daido Steel Co Ltd | Case hardening member for rolling part |
| CN102337452A (en) * | 2011-11-09 | 2012-02-01 | 中南大学 | Low-alloy heat-resisting cast iron and preparation method thereof |
| CN105624569A (en) * | 2016-02-23 | 2016-06-01 | 安徽省宁国顺昌机械有限公司 | High-abrasion bearing |
| CN105673706A (en) * | 2016-02-23 | 2016-06-15 | 安徽省宁国顺昌机械有限公司 | Wear-resistant and corrosion-resistant bearing |
| CN105757124A (en) * | 2016-02-23 | 2016-07-13 | 安徽省宁国顺昌机械有限公司 | High-toughness and high-rigidity rolling bearing |
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| Title |
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| 曾正明等: "《实用金属材料选用手册》", 30 June 2016, 机械工业出版社 * |
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