CN104561756A - Soft real sluice valve body with excellent processability and preparation method of soft real sluice valve body - Google Patents
Soft real sluice valve body with excellent processability and preparation method of soft real sluice valve body Download PDFInfo
- Publication number
- CN104561756A CN104561756A CN201410848519.5A CN201410848519A CN104561756A CN 104561756 A CN104561756 A CN 104561756A CN 201410848519 A CN201410848519 A CN 201410848519A CN 104561756 A CN104561756 A CN 104561756A
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- CN
- China
- Prior art keywords
- valve body
- percent
- perlite
- excellent processability
- soft sealing
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Classifications
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- 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
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- 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
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- 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
A soft real sluice valve body with excellent processability comprises the following chemical element components in percentage by mass: 3.8-4.2 percent of C, 0.05-0.08 percent of Cd, 0.05-0.09 percent of In, 0.3-0.6 percent of Si, 0.1-0.3 percent of Mn, less than 0.03 percent of P, less than 0.03 percent of S, 0.0-0.3 percent of Sc, 1.2-1.6 percent of Ti, 0.01-0.05 percent of Ru, less than 0.005 percent of N, and the balance of Fe. The soft real sluice valve body has an excellent mechanical property, and the grain size of a pearlite is smaller, so that the valve body has favorable processability; the strength, the toughness and the quality stability of the valve body are enhanced by using waste nodular cast iron and steel scraps with specific components and metallographic phases; the spheroidizing process enables an Mg spheroidizing reaction to be stable, prevents Mg combustion, and can prevent Mg from floating on an iron liquid; the spheroidizing reaction is uniform and stable, and the cost is reduced. The pearlite structure of the valve body enhances the strength, the plasticity and the toughness greatly.
Description
Technical field
The present invention relates to casting technology field, soft sealing gate valve valve body particularly relating to a kind of excellent processability 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
Soft sealing gate valve valve body that the object of the present invention is to provide a kind of excellent processability and preparation method thereof, this valve body has excellent mechanical property, also has good processing characteristics.
Technical scheme of the present invention is as follows:
A soft sealing gate valve valve body for excellent processability, is characterized in that: the chemical element composition that it contains and mass percent thereof are: C3.8-4.2, Cd0.05-0.08, In0.05-0.09, Si0.3-0.6, Mn0.1-0.3, P < 0.03, S < 0.03, Sc0.0-0.3, Ti1.2-1.6, Ru0.01-0.05, N < 0.005, surplus are Fe.
The soft sealing gate valve valve body of described excellent processability, it is characterized in that this valve body metallographic structure is 70% perlite+30% ferrite, pearlitic interlamellar spacing is between 120-190nm, in perlite, cementite thickness is to the ratio of ferrite thickness at 0.115-0.64, and the mean sizes of perlite crystal grain is 1-8 μm.
The production method of the soft sealing gate valve valve body of described excellent processability, 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 C3.5-3.8, Si0.2-0.5, Mn0.1-0.3, S < 0.01, P < 0.02, surplus in wherein said waste and old spheroidal graphite cast iron, metallographic structure is 85 perlite, 15% ferrite; Be Fe containing C2.2-2.6, Si0.4-0.7, Mn0.5-0.8, S0.02-0.04, P < 0.02, Ti1.1-1.4, 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 has excellent mechanical property, and perlite particle diameter is less, makes valve body have good processing characteristics; 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 soft sealing gate valve valve body for excellent processability, the chemical element composition that it contains and mass percent thereof are: C3.8-4.2, Cd0.05-0.08, In0.05-0.09, Si0.3-0.6, Mn0.1-0.3, P < 0.03, S < 0.03, Sc0.0-0.3, Ti1.2-1.6, Ru0.01-0.05, N < 0.005, surplus are Fe.
The soft sealing gate valve valve body of described excellent processability, it is characterized in that this valve body metallographic structure is 70% perlite+30% ferrite, pearlitic interlamellar spacing is between 120-190nm, in perlite, cementite thickness is to the ratio of ferrite thickness at 0.115-0.64, and the mean sizes of perlite crystal grain is 1-8 μm.
The production method of the soft sealing gate valve valve body of described excellent processability, 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 C3.5-3.8, Si0.2-0.5, Mn0.1-0.3, S < 0.01, P < 0.02, surplus in wherein said waste and old spheroidal graphite cast iron, metallographic structure is 85 perlite, 15% ferrite; Be Fe containing C2.2-2.6, Si0.4-0.7, Mn0.5-0.8, S0.02-0.04, P < 0.02, Ti1.1-1.4, 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 760Mpa to this embodiment valve body material, elongation ∮ is 10.30%, hardness HBS is 204.
Casing rigidity: nominal pressure reaches 1.5 times of 3.77Mpa(operating pressure PN10,60 seconds), sealing property: nominal pressure reaches 2.87Mpa (operating pressure 1.1 times, 30 seconds).
Claims (4)
1. a soft sealing gate valve valve body for excellent processability, is characterized in that: the chemical element composition that it contains and mass percent thereof are: C3.8-4.2, Cd0.05-0.08, In0.05-0.09, Si0.3-0.6, Mn0.1-0.3, P < 0.03, S < 0.03, Sc0.0-0.3, Ti1.2-1.6, Ru0.01-0.05, N < 0.005, surplus are Fe.
2. the soft sealing gate valve valve body of excellent processability according to claim 1, it is characterized in that this valve body metallographic structure is 70% perlite+30% ferrite, pearlitic interlamellar spacing is between 120-190nm, in perlite, cementite thickness is to the ratio of ferrite thickness at 0.115-0.64, and the mean sizes of perlite crystal grain is 1-8 μm.
3. the production method of the soft sealing gate valve valve body of the excellent processability 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 C3.5-3.8, Si0.2-0.5, Mn0.1-0.3, S < 0.01, P < 0.02, surplus in wherein said waste and old spheroidal graphite cast iron, metallographic structure is 85 perlite, 15% ferrite; Be Fe containing C2.2-2.6, Si0.4-0.7, Mn0.5-0.8, S0.02-0.04, P < 0.02, Ti1.1-1.4, surplus in described steel scrap, its metallographic structure is bainite.
4. the production method of the soft sealing gate valve valve body of excellent processability 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 |
|---|---|---|---|
| CN201410848519.5A CN104561756A (en) | 2014-12-31 | 2014-12-31 | Soft real sluice valve body with excellent processability and preparation method of soft real sluice valve body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410848519.5A CN104561756A (en) | 2014-12-31 | 2014-12-31 | Soft real sluice valve body with excellent processability and preparation method of soft real sluice valve body |
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|---|---|
| CN104561756A true CN104561756A (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410848519.5A Pending CN104561756A (en) | 2014-12-31 | 2014-12-31 | Soft real sluice valve body with excellent processability and preparation method of soft real sluice valve body |
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| CN (1) | CN104561756A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104928563A (en) * | 2015-06-17 | 2015-09-23 | 邵阳富鑫实业有限公司 | Heat-resistant ductile iron resistant to aluminum liquid oxidation and manufacturing method thereof |
| CN111676415A (en) * | 2020-06-15 | 2020-09-18 | 淮南沃力特流体设备有限公司 | High-toughness pneumatic valve and processing technology thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6036757A (en) * | 1983-08-08 | 1985-02-25 | Kubota Ltd | Composite cylinder liner |
| JPH0881741A (en) * | 1994-09-16 | 1996-03-26 | Toshiba Corp | Magnetic material and permanent magnet using the same |
| CN103614647A (en) * | 2013-10-24 | 2014-03-05 | 铜陵市经纬流体科技有限公司 | Rare earth alloy steel material used for valves and preparation method of the material |
| CN103614648A (en) * | 2013-10-24 | 2014-03-05 | 铜陵市经纬流体科技有限公司 | Wear-resistant alloy cast steel material used for pump valves resistant to severe environments and preparation method of the material |
-
2014
- 2014-12-31 CN CN201410848519.5A patent/CN104561756A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6036757A (en) * | 1983-08-08 | 1985-02-25 | Kubota Ltd | Composite cylinder liner |
| JPH0881741A (en) * | 1994-09-16 | 1996-03-26 | Toshiba Corp | Magnetic material and permanent magnet using the same |
| CN103614647A (en) * | 2013-10-24 | 2014-03-05 | 铜陵市经纬流体科技有限公司 | Rare earth alloy steel material used for valves and preparation method of the material |
| CN103614648A (en) * | 2013-10-24 | 2014-03-05 | 铜陵市经纬流体科技有限公司 | Wear-resistant alloy cast steel material used for pump valves resistant to severe environments and preparation method of the material |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104928563A (en) * | 2015-06-17 | 2015-09-23 | 邵阳富鑫实业有限公司 | Heat-resistant ductile iron resistant to aluminum liquid oxidation and manufacturing method thereof |
| CN104928563B (en) * | 2015-06-17 | 2016-05-18 | 邵阳富鑫实业有限公司 | A kind of anti-aluminium liquid oxidation heat-proof nodular cast iron and manufacture method |
| CN111676415A (en) * | 2020-06-15 | 2020-09-18 | 淮南沃力特流体设备有限公司 | High-toughness pneumatic valve and processing technology thereof |
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Application publication date: 20150429 |
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