CN101538676A - Alloy cast iron used for valve seat - Google Patents
Alloy cast iron used for valve seat Download PDFInfo
- Publication number
- CN101538676A CN101538676A CN200910098205A CN200910098205A CN101538676A CN 101538676 A CN101538676 A CN 101538676A CN 200910098205 A CN200910098205 A CN 200910098205A CN 200910098205 A CN200910098205 A CN 200910098205A CN 101538676 A CN101538676 A CN 101538676A
- Authority
- CN
- China
- Prior art keywords
- percent
- iron
- alloy
- cast
- valve seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a formula of alloy cast iron used for a valve seat, comprising the following chemical compositions by weight percentages: 2.9-3.3 percent of C, 2.6-3.2 percent of Si, 0.7-1.2 percent of Mn, 0.3-0.6 percent of P, 32-35 percent of Cr, 0.5-1.0 percent of Ni, 1.2-1.5 percent of Mo, 1.0-0.5 percent of W and the balance of Fe and inevitable impurities. The maximum hardness of the valve seat cast by using the alloy through surface quenching can reach HRC55, and the toughness, wear resistance and high temperature resistance thereof are greatly improved.
Description
Technical field
The invention of this reality relates to a kind of alloy cast iron material, belongs to the metal casting technical field.
Technical background
Valve seating is the important spare part in the oil engine, and wear resistance, toughness and the high thermal resistance of material of processing usefulness all had very high requirement.
At present domestic each big engine works or engine fittings factory have done a large amount of useful explorations in valve seating production material aspect selecting for use, and the copper molybdenum alloy cast iron that uses the earliest, chromiumcopper cast iron, CrMo alloy iron, steel alloy etc. are arranged.Cast alloy iron because wear-resisting, high temperature down little, the cheapness of distortion certain toughness is arranged again, it is very strong to be used to produce the valve seating suitability, still is widely adopted at present.
Our company is the specialized factory that produces internal combustion component such as camshaft, valve tappet, valve seating, and " cast alloy iron that camshaft is used " that proposed in 1999 obtains national inventing patent (ZL99117690.1).This patented technology has been brought into play its due effect in one period, company is at the valve tappet cast alloy iron of development in 2008 simultaneously, applied for national patent, through too much constantly groping, in conjunction with knowhow for many years, on the basis of the existing patented technology of company, carried out a large amount of tests and improvement, can further improve the toughness and the wear resistance of cast alloy iron through improving, and make material newly developed have resistance to elevated temperatures preferably.Can satisfy particularly exhaust valve seat requirements of one's work under hot environment of valve seating.
Summary of the invention
The present invention is directed to original patent weak point a kind of cast alloy iron prescription is provided, make each alloying element collocation of forming described cast alloy iron more reasonable, higher with valve seating wear resistance, the toughness of its production.And has a resistance to elevated temperatures preferably.
Cast alloy iron formulation weight per-cent involved in the present invention is as follows:
C 2.9～3.3?Si 2.6～3.2 Mn?0.7～1.2 P?0.3～0.6
Cr?32～35 Ni 0.5～1.0 Mo：1.2～1.5?W?0.1～0.5
All the other are Fe and unavoidable impurities.
The present invention shows the following aspects to preceding invention improvements:
The present invention no longer adds alloy Cu, and the major function of Cu is to increase the alloy certain toughness, but the resistance to elevated temperatures of cast alloy iron is had than havoc.
1, the invention of this reality has improved the content of Cr in the former invention greatly, and addition is 32～35%.Cr can not only strengthen mechanical property and wear resistance, and can increase high thermal resistance, and the while can increase the non-deformability after hardening capacity and the quenching.
2, the newly-increased alloying element Ni of this practicality invention, addition is 0.5～1.0%.Ni can make the cast iron flexible, and can improve hardening capacity, increase hardness by crystal grain thinning.
3, the newly-increased alloying element W of this practicality invention, addition is 0.1～0.5%.The effect of W is to increase temper resistance, red hardness, heat resistance and form alloy carbide and increase wear resistance.
Improve that more than the mechanical property of described cast alloy iron is further enhanced, and improve this cast alloy iron resistance to elevated temperatures and hardenability energy greatly, can reach hardness HRC55 after the valve seating quenching with its production, high temperature resistant and wear resistance is also improved greatly.
Embodiment
The present invention relates to a kind of cast alloy iron prescription, described cast alloy iron is formed by contained elemental iron alloy and pig iron melting in the prescription.The weight percent of described prescription is as follows:
C 2.9～3.3?Si?2.6～3.2?Mn?0.7～1.2 P?0.3～0.6
Cr 32～35 Ni?0.5～1.0?Mo：1.2～1.5?W?0.1～0.5
All the other are Fe and unavoidable impurities.
With described alloy casting valve seating, carry out hard surfacing after the machining again and handle.Surface hardness can reach HRC55, and the deflection under 1000 ℃ of temperature is less than 0.05%.
Embodiment 1: cast alloy iron chemical ingredients per-cent is:
C 2.5～3.0?Si 2.5～2.8?Mn 0.7～1.2?P 0.3～0.6
Cr 28～33 Ni 0.3～0.7?Mo：1.0～1.3?W 0.1～0.3
All the other are Fe and unavoidable impurities.
The deflection that hardness can reach under ℃ temperature of HRC45～48,1000 after this cast alloy iron quenched can be controlled in 0.1%.
Embodiment 2: cast alloy iron chemical ingredients per-cent is:
C 2.5～3.0?Si 2.5～3.0 Mn?0.6～1.0 P?0.3～0.6
Cr?28～35 Ni 0.5～0.8 Mo：1.0～1.5?W?0.1～0.4
All the other are Fe and unavoidable impurities.
The deflection that hardness can reach under ℃ temperature of HRC48～51,1000 after this cast alloy iron quenched can be controlled in 0.07%.
Embodiment 3: cast alloy iron chemical ingredients per-cent is:
C 2.5～3.3?Si 2.5～3.2?Mn?0.6～1.2 P?0.3～0.6
Cr?30～33 Ni 0.5～0.9?Mo：1.0～1.5?W?0.1～0.5
All the other are Fe and unavoidable impurities.
The deflection that hardness can reach under ℃ temperature of HRC50～53,1000 after this cast alloy iron quenched can be controlled in 0.06%.
Embodiment 4: cast alloy iron chemical ingredients per-cent is:
C 2.6～3.3?Si 2.5～3.2 Mn 0.7～1.2 P?0.3～0.6
Cr 30～35 Ni 0.5～1.0 Mo：1.2～1.5 W?0.1～0.5
All the other are Fe and unavoidable impurities.
The deflection that hardness can reach under ℃ temperature of HRC52～55,1000 after this cast alloy iron quenched can be controlled in 0.05%.
Claims (2)
1, alloy cast iron used for valve seat is characterized in that the chemical component weight per-cent of this Quench cast alloy iron is:
C 2.5～3.3 Si?2.0～3.2?Mn?0.5～1.2 P?0.2～0.6
Cr 18～35 Ni?0.3～1.0?Mo：1.0～1.5?W?0.1～0.5
All the other are Fe and unavoidable impurities.
2, a kind of chilled cast iron alloy is characterized in that the chemical ingredients preferred weight percent of this Quench cast alloy iron is:
C 2.9～3.3?Si 2.6～3.2?Mn?0.7～1.2 P?0.3～0.6
Cr?32～35 Ni 0.5～1.0?Mo：1.2～1.5?W?0.1～0.5
All the other are Fe and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910098205A CN101538676A (en) | 2009-04-30 | 2009-04-30 | Alloy cast iron used for valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910098205A CN101538676A (en) | 2009-04-30 | 2009-04-30 | Alloy cast iron used for valve seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101538676A true CN101538676A (en) | 2009-09-23 |
Family
ID=41122061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910098205A Pending CN101538676A (en) | 2009-04-30 | 2009-04-30 | Alloy cast iron used for valve seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101538676A (en) |
-
2009
- 2009-04-30 CN CN200910098205A patent/CN101538676A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101497966B (en) | High-hardness hypereutectic high chromium, manganese, molybdenum and tungsten alloy wear resistant steel material and use thereof | |
| CN100436633C (en) | Low carbon high alloy steel for ball mill lining and its making process | |
| CN102134682B (en) | Wear resistant steel plate | |
| CN102260829B (en) | 500 HB wear resistant steel plate and its manufacturing method | |
| CN102534356A (en) | Wear-resistant white cast iron material and preparation method thereof | |
| CN105296858A (en) | High-performance engine inlet valve and preparing method thereof | |
| CN101880833A (en) | Stainless bearing steel adopting microalloying of rare earth and applicable to manufacturing miniature and small-size bearings and manufacturing method thereof | |
| CN104328334A (en) | High wear resistance high chromium cast iron used for bimetallic composite tube and preparation method thereof | |
| CN105861957A (en) | High-strength high-wear resistance alloy steel and preparation method thereof | |
| CN107760983A (en) | A kind of production method of low-alloy super-strength steel and its casting | |
| CN101258255B (en) | Martensitic stainless steel sheet for heat-resistant disc brake having excellent hardenability | |
| CN102242319B (en) | Formula of chromium-based tungsten nickel molybdenum highly wear-resistant alloy | |
| US9334977B2 (en) | Engine valve | |
| CN101481770A (en) | Cold shock alloy cast iron | |
| CN102676882B (en) | Alloy material with wear-resistance, heat-resistance, corrosion-resistance, high hardness | |
| CN101440454A (en) | Wear resistant cast iron | |
| JP2007002333A5 (en) | ||
| CN104831157A (en) | Abrasion-resistant high-chromium cast ball and preparation process thereof | |
| CN101270458B (en) | Metastable austenite abrasion-proof cast steel containing manganese-tungsten-aluminum | |
| CN101748335B (en) | Nickel-free grate material for sintering machine and manufacturing method thereof | |
| CN101717889B (en) | High manganese steel frog comprising nano atomic group and manufacturing method thereof | |
| CN101538676A (en) | Alloy cast iron used for valve seat | |
| CN104532167B (en) | A kind of preparation method of high-temperature alloy mould steel | |
| CN106319393A (en) | High-wear-resisting and high-toughness austenite ball grinding mill liner plate and preparing method thereof | |
| CN105886910A (en) | High-performance composite form-relieved tooth used in low-temperature environment and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090923 |