CN104561757A - Boron-reinforced pearlite soft-seal brake valve body and preparing method thereof - Google Patents
Boron-reinforced pearlite soft-seal brake valve body and preparing method thereof Download PDFInfo
- Publication number
- CN104561757A CN104561757A CN201410848604.1A CN201410848604A CN104561757A CN 104561757 A CN104561757 A CN 104561757A CN 201410848604 A CN201410848604 A CN 201410848604A CN 104561757 A CN104561757 A CN 104561757A
- Authority
- CN
- China
- Prior art keywords
- valve body
- perlite
- boron
- soft sealing
- soft
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
- C22C33/10—Making cast-iron alloys including procedures for adding magnesium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/04—Cast-iron alloys containing spheroidal graphite
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
Abstract
The invention provides a boron-reinforced pearlite soft-seal brake valve body. The boron-reinforced pearlite soft-seal brake valve body comprises the following chemical element components in percentage by mass: 3.2-3.5% of C, 0.6-0.8% of Si, 1.6-1.8% of W, 0.008-0.015% of B, 0.01-0.05% of N, 0.3-0.6% of Mn, smaller than 0.04% of P, smaller than 0.01% of S, 0.03-0.05% of Nb, 0.3-0.5% of Cu and the balance of Fe. The B and the Nb are added into the valve body to improve the compactness, the strength, the welding performance and the corrosion resistance of the valve body. Through the use of the specific components as well as metallographic waste spheroidal graphite cast iron and waste steel, the strength, the toughness and the quality stability of the valve body are improved. A spheroidization technology used in the invention stabilizes Mg spheroidization reaction, prevents Mg combustion, can prevent the Mg from floating on molten iron, ensures uniform and stable spheroidization reaction and also reduces the cost. The strength, the plasticity and the toughness of the valve body are greatly improved through the pearlitic structure.
Description
Technical field
The present invention relates to casting technology field, particularly relate to a kind of boron strengthening perlite soft sealing gate valve valve body and preparation method thereof.
Background technology
Soft sealing gate valve is water medium fluid line important control part, and soft sealing gate valve product mainly comprises: the large parts of valve body, valve plate, trapezoidal nut, trapezoidal thread valve rod, gasket, valve gap, rotation hand wheel 7.Soft sealing gate valve principle of work: valve plate is arranged in valve body guide path, trapezoidal nut is placed in the groove of valve plate top; Rotation hand wheel is installed in trapezoidal thread valve rod one end, and another end screws in trapezoidal nut; When rotation rotation hand wheel and trapezoidal thread valve rod, drive trapezoidal nut and valve plate to move up and down, valve plate is closed and is opened thus water medium fluid on-off.
That in 7 large parts, one of key core is valve part at soft sealing gate valve.Valve plate directly moves up and down in valve member, its dimensional precision, Material Strength, directly has influence on soft sealing gate valve and to dam ability and Gate-valve sealing performance.
A lot of soft sealing gate valve valve body is cast by spheroidal graphite cast iron and is formed at present, and spheroidal graphite cast iron also exists some shortcomings, and such as not corrosion-resistant, thermal expansivity is high, and use temperature scope is little, easily causes the shortcomings such as gas leakage.Also need the performance such as hardness, wear resistance, fatigue resistance improving foundry goods in addition, reduce run, drip, leak phenomenon, reduce the defect such as pore, crackle, improve yield rate.These performances can improve the performance of valve body by the composition and technique improving foundry goods.
Summary of the invention
The object of the present invention is to provide a kind of boron to strengthen perlite soft sealing gate valve valve body and preparation method thereof, the compactness of this valve body is good, and intensity is high, good welding performance, corrosion resistance and good.
Technical scheme of the present invention is as follows:
A kind of boron strengthening perlite soft sealing gate valve valve body, is characterized in that: the chemical element composition that it contains and-mass percent thereof are: C3.2-3.5, Si0.6-0.8, W1.6-1.8, B0.008-0.015, N0.01-0.05, Mn0.3-0.6, P < 0.04, S < 0.01, Nb0.03-0.05, Cu0.3-0.5, surplus are Fe.
Described boron strengthening perlite soft sealing gate valve valve body, it is characterized in that this valve body metallographic structure is 75% perlite+25% ferrite, pearlitic interlamellar spacing is between 130-180nm, in perlite, cementite thickness is to the ratio of ferrite thickness at 0.23-0.28, and the mean sizes of perlite crystal grain is 49-62 μm.
The production method of described boron strengthening perlite soft sealing gate valve valve body, is characterized in that:
Production process comprises batching, reinforced, melting, nodularization, casting, finishing process;
In described burden process, containing the waste and old spheroidal graphite cast iron of 15% weight percent and the steel scrap of 15% weight percent in raw material; Be Fe containing C1.9-2.3, Si1.5-1.8, Mn0.1-0.3, S < 0.01, P < 0.02, N0.02-0.04, surplus in wherein said waste and old spheroidal graphite cast iron, metallographic structure is 55% perlite, 45% ferrite; Be Fe containing C2.2-2.5, Si0.4-0.7, Mn0.5-0.8, S < 0.02, P < 0.02, Cu0.1-0.2, surplus in described steel scrap, its metallographic structure is bainite.
Nodularization operation is: the ferrous alloy containing barium and silicon getting 2% weight of molten iron, heat fused in argon atmosphere, be cast into steel pipe, then in argon atmosphere by pure MAG block heat fused, be injected in the steel pipe that ferrous alloy containing barium and silicon makes, then with iron liquid, inlet is sealed, then obtain nodulizing agent bag in the 1Cr25Ni20Si2 heat resisting pipe putting it into both ends open; Be fixed in nodularization bag by nodulizing agent bag, on nucleating agent, uniform spreading covers perlite again, pours iron liquid.
Beneficial effect of the present invention
Valve body of the present invention with the addition of boron, niobium, improves the compactness of valve body, improves intensity, improve welding property, improve corrosion resistance nature; By using waste and old spheroidal graphite cast iron and the steel scrap of special component and metallographic, add the intensity of valve body, toughness and quality stability; Spheriodizing technique of the present invention makes the spheroidizing reacion of Mg stablize, and prevent magnesium from burning, can prevent magnesium from swimming on iron liquid, spheroidizing reacion is uniform and stable, also a saving cost; The pearlitic structure of this valve body considerably increases intensity, plasticity and toughness.
Embodiment
A kind of boron strengthening perlite soft sealing gate valve valve body, the chemical element composition that it contains and-mass percent thereof are: C3.2-3.5, Si0.6-0.8, W1.6-1.8, B0.008-0.015, N0.01-0.05, Mn0.3-0.6, P < 0.04, S < 0.01, Nb0.03-0.05, Cu0.3-0.5, surplus are Fe.
Described boron strengthening perlite soft sealing gate valve valve body, it is characterized in that this valve body metallographic structure is 75% perlite+25% ferrite, pearlitic interlamellar spacing is between 130-180nm, in perlite, cementite thickness is to the ratio of ferrite thickness at 0.23-0.28, and the mean sizes of perlite crystal grain is 49-62 μm.
The production method of described boron strengthening perlite soft sealing gate valve valve body, is characterized in that:
Production process comprises batching, reinforced, melting, nodularization, casting, finishing process;
In described burden process, containing the waste and old spheroidal graphite cast iron of 15% weight percent and the steel scrap of 15% weight percent in raw material; Be Fe containing C1.9-2.3, Si1.5-1.8, Mn0.1-0.3, S < 0.01, P < 0.02, N0.02-0.04, surplus in wherein said waste and old spheroidal graphite cast iron, metallographic structure is 55% perlite, 45% ferrite; Be Fe containing C2.2-2.5, Si0.4-0.7, Mn0.5-0.8, S < 0.02, P < 0.02, Cu0.1-0.2, surplus in described steel scrap, its metallographic structure is bainite.
Nodularization operation is: the ferrous alloy containing barium and silicon getting 2% weight of molten iron, heat fused in argon atmosphere, be cast into steel pipe, then in argon atmosphere by pure MAG block heat fused, be injected in the steel pipe that ferrous alloy containing barium and silicon makes, then with iron liquid, inlet is sealed, then obtain nodulizing agent bag in the 1Cr25Ni20Si2 heat resisting pipe putting it into both ends open; Be fixed in nodularization bag by nodulizing agent bag, on nucleating agent, uniform spreading covers perlite again, pours iron liquid.
Experimental data:
After tested, tensile strength ó b is 689Mpa to this embodiment valve body material, elongation ∮ is 11.22%, hardness HBS is 216.
Casing rigidity: nominal pressure reaches 1.5 times of 3.35Mpa(operating pressure PN10,60 seconds), sealing property: nominal pressure reaches 2.36Mpa (operating pressure 1.1 times, 30 seconds).
Claims (4)
1. a boron strengthening perlite soft sealing gate valve valve body, is characterized in that: the chemical element composition that it contains and-mass percent thereof are: C3.2-3.5, Si0.6-0.8, W1.6-1.8, B0.008-0.015, N0.01-0.05, Mn0.3-0.6, P < 0.04, S < 0.01, Nb0.03-0.05, Cu0.3-0.5, surplus are Fe.
2. boron strengthening perlite soft sealing gate valve valve body according to claim 1, it is characterized in that this valve body metallographic structure is 75% perlite+25% ferrite, pearlitic interlamellar spacing is between 130-180nm, in perlite, cementite thickness is to the ratio of ferrite thickness at 0.23-0.28, and the mean sizes of perlite crystal grain is 49-62 μm.
3. the production method of the boron strengthening perlite soft sealing gate valve valve body according to claim 1 and 2, is characterized in that:
Production process comprises batching, reinforced, melting, nodularization, casting, finishing process;
In described burden process, containing the waste and old spheroidal graphite cast iron of 15% weight percent and the steel scrap of 15% weight percent in raw material; Be Fe containing C1.9-2.3, Si1.5-1.8, Mn0.1-0.3, S < 0.01, P < 0.02, N0.02-0.04, surplus in wherein said waste and old spheroidal graphite cast iron, metallographic structure is 55% perlite, 45% ferrite; Be Fe containing C2.2-2.5, Si0.4-0.7, Mn0.5-0.8, S < 0.02, P < 0.02, Cu0.1-0.2, surplus in described steel scrap, its metallographic structure is bainite.
4. the production method of boron strengthening perlite soft sealing gate valve valve body according to claim 3, is characterized in that:
Nodularization operation is: the ferrous alloy containing barium and silicon getting 2% weight of molten iron, heat fused in argon atmosphere, be cast into steel pipe, then in argon atmosphere by pure MAG block heat fused, be injected in the steel pipe that ferrous alloy containing barium and silicon makes, then with iron liquid, inlet is sealed, then obtain nodulizing agent bag in the 1Cr25Ni20Si2 heat resisting pipe putting it into both ends open; Be fixed in nodularization bag by nodulizing agent bag, on nucleating agent, uniform spreading covers perlite again, pours iron liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410848604.1A CN104561757A (en) | 2014-12-31 | 2014-12-31 | Boron-reinforced pearlite soft-seal brake valve body and preparing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410848604.1A CN104561757A (en) | 2014-12-31 | 2014-12-31 | Boron-reinforced pearlite soft-seal brake valve body and preparing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104561757A true CN104561757A (en) | 2015-04-29 |
Family
ID=53078823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410848604.1A Pending CN104561757A (en) | 2014-12-31 | 2014-12-31 | Boron-reinforced pearlite soft-seal brake valve body and preparing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104561757A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177402A (en) * | 2015-09-06 | 2015-12-23 | 苏州市宝玛数控设备有限公司 | Transmission device for cutting machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE574550A (en) * | 1958-02-06 | 1959-05-02 | Renault | High tenacity cast iron for thick parts and method of obtaining |
| US3607458A (en) * | 1968-05-13 | 1971-09-21 | Dayton Malleable Iron Co The | Weldable and wear resistant magnetic ferritic malleable iron and method |
| CN1624179A (en) * | 2003-12-05 | 2005-06-08 | 肖治平 | Dot graphite cast iron and its production method |
| JP2007314815A (en) * | 2006-05-23 | 2007-12-06 | Nippon Steel & Sumikin Stainless Steel Corp | Thick-sized high strength martensitic stainless steel wire and wire rod having excellent spring cold formability and method for producing steel wire |
| JP2009524740A (en) * | 2006-01-26 | 2009-07-02 | オウベル・アンド・デュヴァル | Method for producing an internal combustion engine valve and the valve obtained by this method |
| CN102220542A (en) * | 2011-05-31 | 2011-10-19 | 长春工业大学 | Industrial production method of chromium-free white cast iron with high wear resistance |
| CN104087819A (en) * | 2014-07-09 | 2014-10-08 | 上海圣德曼铸造有限公司 | As-cast low-temperature strong-toughness ferritic ductile iron material for car steering knuckles and preparation method thereof |
-
2014
- 2014-12-31 CN CN201410848604.1A patent/CN104561757A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE574550A (en) * | 1958-02-06 | 1959-05-02 | Renault | High tenacity cast iron for thick parts and method of obtaining |
| US3607458A (en) * | 1968-05-13 | 1971-09-21 | Dayton Malleable Iron Co The | Weldable and wear resistant magnetic ferritic malleable iron and method |
| CN1624179A (en) * | 2003-12-05 | 2005-06-08 | 肖治平 | Dot graphite cast iron and its production method |
| JP2009524740A (en) * | 2006-01-26 | 2009-07-02 | オウベル・アンド・デュヴァル | Method for producing an internal combustion engine valve and the valve obtained by this method |
| JP2007314815A (en) * | 2006-05-23 | 2007-12-06 | Nippon Steel & Sumikin Stainless Steel Corp | Thick-sized high strength martensitic stainless steel wire and wire rod having excellent spring cold formability and method for producing steel wire |
| CN102220542A (en) * | 2011-05-31 | 2011-10-19 | 长春工业大学 | Industrial production method of chromium-free white cast iron with high wear resistance |
| CN104087819A (en) * | 2014-07-09 | 2014-10-08 | 上海圣德曼铸造有限公司 | As-cast low-temperature strong-toughness ferritic ductile iron material for car steering knuckles and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177402A (en) * | 2015-09-06 | 2015-12-23 | 苏州市宝玛数控设备有限公司 | Transmission device for cutting machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102145898B1 (en) | Hydrogen-induced crack resistance pressure vessel iron plate and manufacturing method thereof | |
| AU2015353251B2 (en) | Low-alloy high-strength high-tenacity steel panel and method for manufacturing same | |
| CN100453681C (en) | High boron wear-resisting casting steel and preparation process thereof | |
| CN104233051B (en) | Carbide-containing ausferrite nodular cast iron and preparation method thereof | |
| CN108950432B (en) | Manufacturing method of high-strength and high-toughness low-alloy wear-resistant steel | |
| Huang et al. | Modification mechanism of cerium on the inclusions in drill steel | |
| CN102691002A (en) | Nuclear electric weldable seamless carbon steel pipe and production method thereof | |
| Hosseini et al. | Optimization of heat treatment to obtain desired mechanical properties of high carbon Hadfield steels | |
| CN102220543A (en) | High-strength wear-resisting nodular cast iron applied on water pump | |
| CN105316565A (en) | High-strength low-hardness ferritic nodular cast iron roller ring and manufacturing method thereof | |
| CN102268586B (en) | Corrosion-resistant alloy cast iron and preparation method thereof | |
| CN102304672A (en) | Low and medium alloy wear resistant steel and preparation method thereof | |
| CN102181782A (en) | Method for manufacturing high-nickel austenitic ductile cast iron valve rod nut | |
| CN104561756A (en) | Soft real sluice valve body with excellent processability and preparation method of soft real sluice valve body | |
| CN110117751B (en) | Wear-resistant corrosion-resistant bimetal composite pipe material and preparation method thereof | |
| KR20130087213A (en) | High strength flake graphite iron using rare earth element and preparation method thereof | |
| CN104561757A (en) | Boron-reinforced pearlite soft-seal brake valve body and preparing method thereof | |
| CN104561797A (en) | Pearlitic soft-sealing brake valve body easy to weld and preparation method thereof | |
| CN104633216A (en) | Corrosion-resisting pearlite soft sealing gate valve body and preparing method thereof | |
| CN104565487A (en) | Pearlite flexible sealing gate valve for delivering hot water and preparation method thereof | |
| CN105132790A (en) | Vanadium-containing carbidic austempered ductile iron and preparation method thereof | |
| CN104561758A (en) | High-pressure-resistant soft-seal brake valve body and preparing method thereof | |
| CN104561754A (en) | Soft-seal brake valve body of spheroidal graphite cast iron and preparing method of soft-seal brake valve body | |
| CN104532115A (en) | Hydrogen-embrittlement-resistant high-strength soft sealing sluice valve body and preparation method thereof | |
| CN104561760A (en) | High-toughness soft-seal brake valve body and preparing 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150429 |
|
| RJ01 | Rejection of invention patent application after publication |