CN104561760A - High-toughness soft-seal brake valve body and preparing method thereof - Google Patents
High-toughness soft-seal brake valve body and preparing method thereof Download PDFInfo
- Publication number
- CN104561760A CN104561760A CN201410848673.2A CN201410848673A CN104561760A CN 104561760 A CN104561760 A CN 104561760A CN 201410848673 A CN201410848673 A CN 201410848673A CN 104561760 A CN104561760 A CN 104561760A
- Authority
- CN
- China
- Prior art keywords
- valve body
- perlite
- obdurability
- soft sealing
- toughness
- 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
- C22C37/06—Cast-iron alloys containing chromium
- C22C37/08—Cast-iron alloys containing chromium with nickel
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
A high-toughness soft-seal brake valve body comprises the following chemical element components in percentage by mass: 3.7-4.1% of C, 0-0.6% of Nb, 0.3-0.6% of Si, 0.4-0.6% of Mn, 0.08-0.15% of P, smaller than 0.03% of S, 0.1-0.5% of Mo, 0.3-0.7% of Cr, 0.3-0.8% of Ni and the balance of Fe. Due to the addition of the Cr, the Ni and the Mb into the valve body, the compactness, the strength and the toughness of the valve body are improved. Through the use of 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 the spheroidization reaction of Mg, prevents magnesium combustion, can prevent the magnesium from floating on molten iron, ensures uniform and stable spheroidization reaction and further reduces the cost. The strength, the plasticity and the toughness of the valve body are greatly improved through the pearlitic structrure.
Description
Technical field
The present invention relates to casting technology field, particularly relate to a kind of obdurability 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 obdurability soft sealing gate valve valve body and preparation method thereof, it is good that this valve body has compactness, the feature that obdurability is good.
Technical scheme of the present invention is as follows:
A kind of obdurability soft sealing gate valve valve body, is characterized in that: the chemical element composition that it contains and mass percent thereof are: C3.7-4.1, Nb0-0.6, Si0.3-0.6, Mn0.4-0.6, P0.08-0.15, S < 0.03, Mo0.1-0.5, Cr0.3-0.7, Ni0.3-0.8, surplus are Fe.
Described obdurability soft sealing gate valve valve body, it is characterized in that this valve body metallographic structure is 89% perlite+11% ferrite, pearlitic interlamellar spacing is between 20-90nm, in perlite, cementite thickness is to the ratio of ferrite thickness at 0.14-0.25, and the mean sizes of perlite crystal grain is 10-16 μm.
The production method of described obdurability 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 C2.5-3.2, Si0.2-0.6, Mn0.1-0.3, S < 0.01, P < 0.02, surplus in wherein said waste and old spheroidal graphite cast iron, metallographic structure is more than 90% perlite; Be Fe containing C0.2-0.5, Si0.4-0.7, Mn0.1-0.2, S < 0.01, P0.03-0.06, 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 Cr, Ni, Nb, adds compactness, improves intensity and toughness, by using waste and old spheroidal graphite cast iron and the steel scrap of special component and metallographic, adds 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 substantially increases the intensity of valve body, plasticity and toughness.
Embodiment
A kind of obdurability soft sealing gate valve valve body, the chemical element composition that it contains and mass percent thereof are: C3.7-4.1, Nb0-0.6, Si0.3-0.6, Mn0.4-0.6, P0.08-0.15, S < 0.03, Mo0.1-0.5, Cr0.3-0.7, Ni0.3-0.8, surplus are Fe.
Described obdurability soft sealing gate valve valve body, it is characterized in that this valve body metallographic structure is 89% perlite+11% ferrite, pearlitic interlamellar spacing is between 20-90nm, in perlite, cementite thickness is to the ratio of ferrite thickness at 0.14-0.25, and the mean sizes of perlite crystal grain is 10-16 μm.
The production method of described obdurability 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 C2.5-3.2, Si0.2-0.6, Mn0.1-0.3, S < 0.01, P < 0.02, surplus in wherein said waste and old spheroidal graphite cast iron, metallographic structure is more than 90% perlite; Be Fe containing C0.2-0.5, Si0.4-0.7, Mn0.1-0.2, S < 0.01, P0.03-0.06, 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 536Mpa to this embodiment valve body material, elongation ∮ is 11.65%, hardness HBS is 226.
Casing rigidity: nominal pressure reaches 1.5 times of 3.54Mpa(operating pressure PN10,60 seconds), sealing property: nominal pressure reaches 2.46Mpa (operating pressure 1.1 times, 30 seconds).
Claims (4)
1. an obdurability soft sealing gate valve valve body, is characterized in that: the chemical element composition that it contains and mass percent thereof are: C3.7-4.1, Nb0-0.6, Si0.3-0.6, Mn0.4-0.6, P0.08-0.15, S < 0.03, Mo0.1-0.5, Cr0.3-0.7, Ni0.3-0.8, surplus are Fe.
2. obdurability soft sealing gate valve valve body according to claim 1, it is characterized in that this valve body metallographic structure is 89% perlite+11% ferrite, pearlitic interlamellar spacing is between 20-90nm, in perlite, cementite thickness is to the ratio of ferrite thickness at 0.14-0.25, and the mean sizes of perlite crystal grain is 10-16 μm.
3. the production method of the obdurability 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 C2.5-3.2, Si0.2-0.6, Mn0.1-0.3, S < 0.01, P < 0.02, surplus in wherein said waste and old spheroidal graphite cast iron, metallographic structure is more than 90% perlite; Be Fe containing C0.2-0.5, Si0.4-0.7, Mn0.1-0.2, S < 0.01, P0.03-0.06, Cu0.1-0.2, surplus in described steel scrap, its metallographic structure is bainite.
4. the production method of obdurability 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 |
|---|---|---|---|
| CN201410848673.2A CN104561760A (en) | 2014-12-31 | 2014-12-31 | High-toughness soft-seal brake valve body and preparing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410848673.2A CN104561760A (en) | 2014-12-31 | 2014-12-31 | High-toughness soft-seal brake valve body and preparing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104561760A true CN104561760A (en) | 2015-04-29 |
Family
ID=53078826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410848673.2A Pending CN104561760A (en) | 2014-12-31 | 2014-12-31 | High-toughness soft-seal brake valve body and preparing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104561760A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4165407A (en) * | 1976-06-25 | 1979-08-21 | Kubota, Ltd. | Adamite roll material for a rolling mill |
| CN1598030A (en) * | 2004-07-26 | 2005-03-23 | 江苏共昌轧辊有限公司 | Improved nickel chromium molybdenum inlimited cold hard cast-iron for roller and its compound roller |
| CN101418413A (en) * | 2008-09-24 | 2009-04-29 | 上海大学 | Niobium alloy cast iron brake disk material and technique for producing the same |
| CN103320676A (en) * | 2013-06-24 | 2013-09-25 | 无锡市彩云机械设备有限公司 | Alloy nodular cast iron roll |
| CN103993216A (en) * | 2014-05-26 | 2014-08-20 | 广东美芝精密制造有限公司 | Plunger for compressor pump body, production method thereof as well as compressor and refrigeration equipment |
| 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 CN201410848673.2A patent/CN104561760A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4165407A (en) * | 1976-06-25 | 1979-08-21 | Kubota, Ltd. | Adamite roll material for a rolling mill |
| CN1598030A (en) * | 2004-07-26 | 2005-03-23 | 江苏共昌轧辊有限公司 | Improved nickel chromium molybdenum inlimited cold hard cast-iron for roller and its compound roller |
| CN101418413A (en) * | 2008-09-24 | 2009-04-29 | 上海大学 | Niobium alloy cast iron brake disk material and technique for producing the same |
| CN103320676A (en) * | 2013-06-24 | 2013-09-25 | 无锡市彩云机械设备有限公司 | Alloy nodular cast iron roll |
| CN103993216A (en) * | 2014-05-26 | 2014-08-20 | 广东美芝精密制造有限公司 | Plunger for compressor pump body, production method thereof as well as compressor and refrigeration equipment |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3225710A1 (en) | Low-alloy high-strength high-tenacity steel panel and method for manufacturing same | |
| CN104233051B (en) | Carbide-containing ausferrite nodular cast iron and preparation method thereof | |
| CN111101065B (en) | High-strength corrosion-resistant high-temperature-resistant welding wire steel and production method thereof | |
| CN102127673A (en) | High-strength spheroidal graphite cast iron for thick-walled casting die | |
| CN102220543A (en) | High-strength wear-resisting nodular cast iron applied on water pump | |
| CN102691002A (en) | Nuclear electric weldable seamless carbon steel pipe and production method thereof | |
| CN108286025A (en) | A kind of resistance to marine corrosion reinforcing bar | |
| CN102268586B (en) | Corrosion-resistant alloy cast iron and preparation method thereof | |
| CN102317488A (en) | Resistance gray iron alloy for combustion engines and general casts | |
| CN104087818A (en) | Low-chromium alloy wear-resisting ball and preparation method thereof | |
| CN102181782A (en) | Method for manufacturing high-nickel austenitic ductile cast iron valve rod nut | |
| CN102317480A (en) | Method to obtain a high resistance gray iron alloy for combustion engines and general casts | |
| KR101822201B1 (en) | High strength flake graphite iron using rare earth element and preparation method thereof | |
| CN104561756A (en) | Soft real sluice valve body with excellent processability and preparation method of soft real sluice valve body | |
| CN104561797A (en) | Pearlitic soft-sealing brake valve body easy to weld and preparation method thereof | |
| CN104561757A (en) | Boron-reinforced pearlite soft-seal brake valve body and preparing method thereof | |
| CN104561760A (en) | High-toughness soft-seal brake valve body and preparing method thereof | |
| Hosseini et al. | Optimization of heat treatment to obtain desired mechanical properties of high carbon Hadfield steels | |
| CN104633216A (en) | Corrosion-resisting pearlite soft sealing gate valve body and preparing method thereof | |
| CN104561758A (en) | High-pressure-resistant soft-seal brake valve body and preparing method thereof | |
| CN104565487A (en) | Pearlite flexible sealing gate valve for delivering hot water and preparation method thereof | |
| CN104561753A (en) | Thermal strength type soft-seal brake valve body and preparing method thereof | |
| CN102168219A (en) | Spheroidization process for nickelic austenite spherical graphite cast iron | |
| CN104561759A (en) | Spheroidal graphite cast iron valve body of medium-pressure flexible sealing gate valve and preparation method of spheroidal graphite cast iron valve body | |
| CN103741017B (en) | A kind of High-strength vermicular graphite cast iron high-pressure valve body material |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150429 |