CN103882329A - Alloy material for internal combustion engine valve seats and preparation method thereof - Google Patents
Alloy material for internal combustion engine valve seats and preparation method thereof Download PDFInfo
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- CN103882329A CN103882329A CN201410054457.0A CN201410054457A CN103882329A CN 103882329 A CN103882329 A CN 103882329A CN 201410054457 A CN201410054457 A CN 201410054457A CN 103882329 A CN103882329 A CN 103882329A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention relates to an alloy material for internal combustion engine valve seats, which contains the following chemical components in percentage by mass: 0.9-1.2% of carbon, 1.2-1.3% of silicon, 0.3-0.5% of manganese, 2.0-2.5% of Ni, 1.3-1.5% of Co, 0.3-0.5% of Mo, 5.7-6.2% of Cr, 0.1-0.2% of V, 0.005-0.008% of niobium, 0.02-0.04% of tungsten, 1.0-1.2% of Al, at most 0.030% of P, at most 0.030% of S and the balance of iron. By reasonably arranging the proportioned raw materials and production technique and reasonably setting the feed sequence, the formed alloy material has the characteristics of high strength, high hardness, favorable wear resistance, favorable impact toughness, high heat strength, high temperature corrosion resistance, corrosion resistance and the like. Part of scrap iron is used as the raw material, so that the alloy quality is stable and uniform. The alloy material is suitable for internal combustion engine valve seats. The refining agent is added to lower the porosity by 1-2 degrees.
Description
Technical field
The present invention relates to metallic substance preparation field, relate in particular to a kind of alloy material for internal combustion engine valve gate seat and preparation method thereof.
Background technology
The development of steel alloy has had the history of more than 100 year, up to the present, diversified steel alloy is employed industrial, mainly contain with Types Below: quenched and tempered steel, spring steel, tool steel, rapid steel, die steel, high, normal, basic carbon alloy steel etc., so far, although steel alloy technology is greatly developed, but, still have a lot of problems to exist, as fastness to rubbing, hardness, rustless property, corrosion resistance nature, high and low temperature resistance, fragility, toughness, costs etc. can not be taken into account, can't meet the requirement of production in a lot of occasions, also require further improvement, to enhance productivity, reduce costs, improve security, for high-quality precision and sophisticated technology development provides safeguard, for social development provides power, task is also very arduous.
Summary of the invention
The object of the present invention is to provide a kind of alloy material for internal combustion engine valve gate seat and preparation method thereof, this alloy material has high wear resistance and hardness, and impelling strength is high, the feature of high-temperature corrosion resistance.
Technical scheme of the present invention is as follows:
For an alloy material for internal combustion engine valve gate seat, it is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.9-1.2, silicon 1.2-1.3, manganese 0.3-0.5, Ni2.0-2.5, Co1.3-1.5, Mo0.3-0.5, Cr5.7-6.2, V0.1-0.2, niobium 0.005-0.008, tungsten 0.02-0.04, Al1.0-1.2, P≤0.030, S≤0.030, surplus are iron.
The production method of the described alloy material for internal combustion engine valve gate seat, is characterized in that:
(1), the pig iron and scrap iron are dropped in stove and melt and originate as ferrous substrate in 1:1 ratio; Carry out desulfurization, deoxidation, alloying, the refining of employing refining agent, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove be: (1) silicon, Mo, niobium; (2) manganese, Ni, tungsten; (3) Cr, aluminium; (4) other remaining component; The each batch of timed interval of dropping into element is 8-10 minute, after feeding intake, stirs.
Described casting postheat treatment is: be first warming up to 930-945 DEG C by room temperature with 200-230 DEG C/h of speed, insulation 3-4 hour; Be cooled to 630-650 DEG C with 140-160 DEG C/h of speed again, insulation 30-60 minute; Be cooled to 320-340 DEG C with 100-120 DEG C/h of speed again, insulation 2-3 hour; Be warming up to 520-540 DEG C with 150-170 DEG C/h of speed again, insulation 2-3 hour, takes out air cooling and get final product.
Described refining agent is made up of the raw material of following weight part: instrument comminuted steel shot 3-4, clay 10-12, Wingdale 3-4,
sepiolite 2-3, Sodium Silicofluoride 2-3, SODIUMNITRATE 1-2,
vermiculite 5-6, silicon carbide 9-11, titanium dioxide 2-3, fluorite 6-8, aluminium hydroxide 8-10, jade powder 3-4, montmorillonite 1-2; Preparation method mixes each raw material, is heated to molten state and stirs remove slag, and then, is poured into Quench in pure water, then is ground into 100-200 order powder; Gained powder is added and is equivalent to the silane resin acceptor kh-550 of powder weight 2-3%, the nano-carbon powder of 1-2%, after mixing, under 8-15Mpa, be pressed into base, then, at 900-950 DEG C, calcine 3-4 hour, cooling after, be ground into again 150-250 order powder, obtain final product.
Beneficial effect of the present invention
The present invention is by using the material combination such as niobium, tungsten, aluminium, proportioning and production technique are rationally set, input order is rationally set, and the alloy material of formation has high strength, high rigidity, wear resistance is good, impelling strength is good, hot strength is high, high-temperature corrosion resistance, the feature such as anti-oxidant; And use part scrap iron as raw material, make the steady quality homogeneous of alloy; The present invention is applicable to internal combustion engine valve gate seat.Refining agent of the present invention is for Foundry Production, and the degree of porosity obviously improving in yield rate, particularly foundry goods reduces 1-2 degree, is controlled effectively, and can not produce pore at cast(ing) surface, and trapped oxide also obviously reduces, and oxide inclusion is 2 grades of left and right.
Embodiment
For an alloy material for internal combustion engine valve gate seat, chemical element composition and mass percent thereof that it contains are: carbon 0.9-1.2, silicon 1.2-1.3, manganese 0.3-0.5, Ni2.0-2.5, Co1.3-1.5, Mo0.3-0.5, Cr5.7-6.2, V0.1-0.2, niobium 0.005-0.008, tungsten 0.02-0.04, Al1.0-1.2, P≤0.030, S≤0.030, surplus are iron.
The production method of the described alloy material for internal combustion engine valve gate seat is:
(1), the pig iron and scrap iron are dropped in stove and melt and originate as ferrous substrate in 1:1 ratio; Carry out desulfurization, deoxidation, alloying, the refining of employing refining agent, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove be: (1) silicon, Mo, niobium; (2) manganese, Ni, tungsten; (3) Cr, aluminium; (4) other remaining component; The each batch of timed interval of dropping into element is 9 minutes, after feeding intake, stirs.
Described casting postheat treatment is: be first warming up to 940 DEG C by room temperature with 220 DEG C/h of speed, be incubated 3.5 hours; Be cooled to 640 DEG C with 150 DEG C/h of speed again, be incubated 50 minutes; Be cooled to 330 DEG C with 110 DEG C/h of speed again, be incubated 2.5 hours; Be warming up to 530 DEG C with 160 DEG C/h of speed again, be incubated 2 hours, take out air cooling and get final product.
Described refining agent by following weight part (kilogram) raw material make: instrument comminuted steel shot 4, clay 10, Wingdale 3,
sepiolite 2, Sodium Silicofluoride 2, SODIUMNITRATE 2,
vermiculite 5, silicon carbide 9, titanium dioxide 2, fluorite 8, aluminium hydroxide 8, jade powder 3, montmorillonite 2; Preparation method mixes each raw material, is heated to molten state and stirs remove slag, and then, is poured into Quench in pure water, then is ground into 100-200 order powder; Gained powder is added and is equivalent to the silane resin acceptor kh-550 of powder weight 2%, 1% nano-carbon powder, after mixing, under 12-15Mpa, be pressed into base, then, at 900-950 DEG C, calcine 3-4 hour, cooling after, be ground into again 150-250 order powder, obtain final product.
The present invention for the mechanical property of the alloy material of internal combustion engine valve gate seat is: tensile strength 1334MPa, yield strength 969MPa, unit elongation 12%, relative reduction in area 22%, impact absorbing energy 48J, impelling strength 58.9J/cm2, hardness 295HB.
Claims (4)
1. for an alloy material for internal combustion engine valve gate seat, it is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.9-1.2, silicon 1.2-1.3, manganese 0.3-0.5, Ni2.0-2.5, Co1.3-1.5, Mo0.3-0.5, Cr5.7-6.2, V0.1-0.2, niobium 0.005-0.008, tungsten 0.02-0.04, Al1.0-1.2, P≤0.030, S≤0.030, surplus are iron.
2. the production method of the alloy material for internal combustion engine valve gate seat according to claim 1, is characterized in that:
(1), the pig iron and scrap iron are dropped in stove and melt and originate as ferrous substrate in 1:1 ratio; Carry out desulfurization, deoxidation, alloying, the refining of employing refining agent, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove be: (1) silicon, Mo, niobium; (2) manganese, Ni, tungsten; (3) Cr, aluminium; (4) other remaining component; The each batch of timed interval of dropping into element is 8-10 minute, after feeding intake, stirs.
3. the production method of the alloy material for internal combustion engine valve gate seat according to claim 2, is characterized in that: described casting postheat treatment is: be first warming up to 930-945 DEG C by room temperature with 200-230 DEG C/h of speed, insulation 3-4 hour; Be cooled to 630-650 DEG C with 140-160 DEG C/h of speed again, insulation 30-60 minute; Be cooled to 320-340 DEG C with 100-120 DEG C/h of speed again, insulation 2-3 hour; Be warming up to 520-540 DEG C with 150-170 DEG C/h of speed again, insulation 2-3 hour, takes out air cooling and get final product.
4. the production method of the alloy material for internal combustion engine valve gate seat according to claim 2, is characterized in that: described refining agent is made up of the raw material of following weight part: instrument comminuted steel shot 3-4, clay 10-12, Wingdale 3-4,
sepiolite 2-3, Sodium Silicofluoride 2-3, SODIUMNITRATE 1-2,
vermiculite 5-6, silicon carbide 9-11, titanium dioxide 2-3, fluorite 6-8, aluminium hydroxide 8-10, jade powder 3-4, montmorillonite 1-2; Preparation method mixes each raw material, is heated to molten state and stirs remove slag, and then, is poured into Quench in pure water, then is ground into 100-200 order powder; Gained powder is added and is equivalent to the silane resin acceptor kh-550 of powder weight 2-3%, the nano-carbon powder of 1-2%, after mixing, under 8-15Mpa, be pressed into base, then, at 900-950 DEG C, calcine 3-4 hour, cooling after, be ground into again 150-250 order powder, obtain final product.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410054457.0A CN103882329A (en) | 2014-02-18 | 2014-02-18 | Alloy material for internal combustion engine valve seats and preparation method thereof |
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| CN201410054457.0A CN103882329A (en) | 2014-02-18 | 2014-02-18 | Alloy material for internal combustion engine valve seats and preparation method thereof |
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| CN103882329A true CN103882329A (en) | 2014-06-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107083518A (en) * | 2017-06-20 | 2017-08-22 | 合肥博创机械制造有限公司 | A kind of casting technique of steel alloy valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63171856A (en) * | 1987-01-09 | 1988-07-15 | Hitachi Ltd | Heat-resisting steel and gas turbine using same |
| CN1316540A (en) * | 2000-03-30 | 2001-10-10 | 住友金属工业株式会社 | Heat-resisting steel |
| CN102876994A (en) * | 2012-10-24 | 2013-01-16 | 章磊 | Heat resistant steel for worm gear member and manufacture method of heat resistant steel |
| CN103146879A (en) * | 2013-02-04 | 2013-06-12 | 安徽省繁昌县皖南阀门铸造有限公司 | Steelmaking refining agent containing modified smectite powder and preparation method thereof |
| CN103397277A (en) * | 2013-07-01 | 2013-11-20 | 安徽三联泵业股份有限公司 | High-strength cast steel for water pump shell and preparation method thereof |
-
2014
- 2014-02-18 CN CN201410054457.0A patent/CN103882329A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63171856A (en) * | 1987-01-09 | 1988-07-15 | Hitachi Ltd | Heat-resisting steel and gas turbine using same |
| CN1316540A (en) * | 2000-03-30 | 2001-10-10 | 住友金属工业株式会社 | Heat-resisting steel |
| CN102876994A (en) * | 2012-10-24 | 2013-01-16 | 章磊 | Heat resistant steel for worm gear member and manufacture method of heat resistant steel |
| CN103146879A (en) * | 2013-02-04 | 2013-06-12 | 安徽省繁昌县皖南阀门铸造有限公司 | Steelmaking refining agent containing modified smectite powder and preparation method thereof |
| CN103397277A (en) * | 2013-07-01 | 2013-11-20 | 安徽三联泵业股份有限公司 | High-strength cast steel for water pump shell and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107083518A (en) * | 2017-06-20 | 2017-08-22 | 合肥博创机械制造有限公司 | A kind of casting technique of steel alloy valve |
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Application publication date: 20140625 |
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