CN104633214A - High density soft sealing gate valve body and preparation method thereof - Google Patents

High density soft sealing gate valve body and preparation method thereof Download PDF

Info

Publication number
CN104633214A
CN104633214A CN201410848588.6A CN201410848588A CN104633214A CN 104633214 A CN104633214 A CN 104633214A CN 201410848588 A CN201410848588 A CN 201410848588A CN 104633214 A CN104633214 A CN 104633214A
Authority
CN
China
Prior art keywords
valve body
soft sealing
gate valve
sealing gate
high density
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
Application number
CN201410848588.6A
Other languages
Chinese (zh)
Inventor
吴寿涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tongling Jingwei Fluid Technology Co Ltd
Original Assignee
Tongling Jingwei Fluid Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tongling Jingwei Fluid Technology Co Ltd filed Critical Tongling Jingwei Fluid Technology Co Ltd
Priority to CN201410848588.6A priority Critical patent/CN104633214A/en
Publication of CN104633214A publication Critical patent/CN104633214A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00Construction of housing; Use of materials therefor
    • F16K27/04Construction of housing; Use of materials therefor of sliding valves
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C33/00Making ferrous alloys
    • C22C33/08Making cast-iron alloys
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C37/00Cast-iron alloys
    • C22C37/10Cast-iron alloys containing aluminium or silicon

Abstract

The invention provides a high density soft sealing gate valve body. The chemical elementary components of the high density soft sealing gate valve body comprise, by weight, C3.3-3.5, B0.01-0.02, V0.02-0.04, Co1.2-1.5, Mo2-2.4, Si2.5-2.9, Mn<0.6, P<0.08, S<0.01, Cu0.1-0.3, and the balance Fe. According to the preparation method of the high density soft sealing gate valve body, by using the specific components and metallographic waste nodular cast iron and steel scrap, and the intensity, the toughness and the quality stability of the valve body are improved; the balling technology of the preparation method of the high density soft sealing gate valve body enables the absorbing rates of Mg, RE and Si to be high, the balling action is stable, and balling decline dose not occur 15min later after the balling action; B and V are added to the valve body, the compactness and the intensity are improved, the heat resistance is improved by adding Co and Mo, and the pearlitic structrure on the surface of the valve body greatly improves the intensity, the plasticity and the toughness.

Description

Soft sealing gate valve valve body of a kind of high densification and preparation method thereof
Technical field
The present invention relates to casting technology field, particularly relate to soft sealing gate valve valve body of a kind of high densification and preparation method thereof.
Background technique
Soft sealing gate valve is the important control piece of aqueous medium fluid line, and soft sealing gate valve product mainly comprises: the large parts of valve body, valve plate, trapezoidal nut, trapezoidal thread valve rod, sealing gasket, valve gap, rotation hand wheel 7.Soft sealing gate valve working principle: valve plate is arranged in valve body guiding groove, 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 aqueous medium fluid on-off.
That in 7 large parts, one of key core is valve body parts at soft sealing gate valve.Valve plate directly moves up and down in valve member, its dimensional accuracy, 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 expansion coefficient is high, and serviceability 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 soft sealing gate valve valve body of a kind of high densification and preparation method thereof, this valve body compactness and intensity high, heat is strong high.
Technological scheme of the present invention is as follows:
A soft sealing gate valve valve body for high densification, is characterized in that: the chemical element composition that it contains and mass percent thereof are: C3.3-3.5, B0.01-0.02, V0.02-0.04, Co 1.2-1.5, Mo2-2.4, Si2.5-2.9, Mn1.3-1.9, P < 0.08, S < 0.01, Cu0.1-0.3, surplus are Fe.
The soft sealing gate valve valve body of described height densification, it is characterized in that this valve body metallographic structure is 62% pearlite+38% ferrite, and be the degree of depth of starting point from surface be 18-22mm scope inner tissue be pearlite, pearlitic interlamellar spacing is between 70-120nm, and in pearlite, cementite thickness is 0.04-0.16 to ferrite thickness.
The production method of the soft sealing gate valve valve body of described height densification, 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 percentage and the steel scrap of 15% weight percentage in raw material; The chemical element composition that wherein said waste and old spheroidal graphite cast iron contains and mass percent are: C1.8-2.1, Si0.9-1.4, Mn0.9-1.2, S < 0.01, P < 0.02, Cu0.2-0.3, surplus are Fe, metallographic structure is 70% pearlite, 30% ferrite; The chemical element composition that described steel scrap contains and mass percent are: C1.1-1.5, Si0.8-1.2, Mn0.3-0.5, S < 0.01, P < 0.02, surplus are Fe, and its metallographic structure is bainite.
Nodularization operation is: be injected in square steel pipe by the rare earth ferrosilicomagnesium inoculant alloy liquid melted and solidify cooling, get the ferrous alloy containing barium and silicon of 2% weight of molten iron, is melted by ferrous alloy containing barium and silicon, and spray is to square steel pipe surface, and cooling, obtains Integral ball agent bag; Be fixed in nodularization bag by Integral ball agent bag, on inovulant, uniform spreading covers perlite again, pours iron liquid.
Beneficial effect of the present invention
Valve body of the present invention, 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; Spheroidizing process of the present invention makes the absorptivity of Mg, RE and Si high, and spheroidizing reacion is stablized, and spheroidizing reacion does not occur decaying spheroidisation after terminating 15 minutes; This valve body with the addition of B, V, adds compactness and intensity, and by adding Co, Mo, add heat resistance, this valve body surface pearlitic structrure considerably increases intensity, plasticity and toughness.
Embodiment
A soft sealing gate valve valve body for high densification, the chemical element composition that it contains and mass percent thereof are: C3.3-3.5, B0.01-0.02, V0.02-0.04, Co 1.2-1.5, Mo2-2.4, Si2.5-2.9, Mn1.3-1.9, P < 0.08, S < 0.01, Cu0.1-0.3, surplus are Fe.
The soft sealing gate valve valve body of described height densification, it is characterized in that this valve body metallographic structure is 62% pearlite+38% ferrite, and be the degree of depth of starting point from surface be 20mm scope inner tissue be pearlite, pearlitic interlamellar spacing is between 70-120nm, and in pearlite, cementite thickness is 0.04-0.16 to ferrite thickness.
The production method of the soft sealing gate valve valve body of described height densification, 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 percentage and the steel scrap of 15% weight percentage in raw material; The chemical element composition that wherein said waste and old spheroidal graphite cast iron contains and mass percent are: C1.8-2.1, Si0.9-1.4, Mn0.9-1.2, S < 0.01, P < 0.02, Cu0.2-0.3, surplus are Fe, metallographic structure is 70% pearlite, 30% ferrite; The chemical element composition that described steel scrap contains and mass percent are: C1.1-1.5, Si0.8-1.2, Mn0.3-0.5, S < 0.01, P < 0.02, surplus are Fe, and its metallographic structure is bainite.
Nodularization operation is: be injected in square steel pipe by the rare earth ferrosilicomagnesium inoculant alloy liquid melted and solidify cooling, get the ferrous alloy containing barium and silicon of 2% weight of molten iron, is melted by ferrous alloy containing barium and silicon, and spray is to square steel pipe surface, and cooling, obtains Integral ball agent bag; Be fixed in nodularization bag by Integral ball agent bag, on inovulant, uniform spreading covers perlite again, pours iron liquid.
Laboratory data:
After tested, tensile strength ó b is 590Mpa to this embodiment's valve body material, elongation percentage ∮ is 11.85%, hardness HBS is 245.
Casing rigidity: nominal pressure reaches 1.5 times of 3.45Mpa(working pressure PN10,60 seconds), sealability: nominal pressure reaches 2.39Mpa (working pressure 1.1 times, 30 seconds).

Claims (4)

1. a soft sealing gate valve valve body for high densification, is characterized in that: the chemical element composition that it contains and mass percent thereof are: C3.3-3.5, B0.01-0.02, V0.02-0.04, Co 1.2-1.5, Mo2-2.4, Si2.5-2.9, Mn1.3-1.9, P < 0.08, S < 0.01, Cu0.1-0.3, surplus are Fe.
2. high fine and close soft sealing gate valve valve body according to claim 1, it is characterized in that this valve body metallographic structure is 62% pearlite+38% ferrite, and be the degree of depth of starting point from surface be 18-22mm scope inner tissue be pearlite, pearlitic interlamellar spacing is between 70-120nm, and in pearlite, cementite thickness is 0.04-0.16 to ferrite thickness.
3. the production method of the soft sealing gate valve valve body of the height densification 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 percentage and the steel scrap of 15% weight percentage in raw material; The chemical element composition that wherein said waste and old spheroidal graphite cast iron contains and mass percent are: C1.8-2.1, Si0.9-1.4, Mn0.9-1.2, S < 0.01, P < 0.02, Cu0.2-0.3, surplus are Fe, metallographic structure is 70% pearlite, 30% ferrite; The chemical element composition that described steel scrap contains and mass percent are: C1.1-1.5, Si0.8-1.2, Mn0.3-0.5, S < 0.01, P < 0.02, surplus are Fe, and its metallographic structure is bainite.
4. the production method of high fine and close soft sealing gate valve valve body according to claim 3, is characterized in that:
Nodularization operation is: be injected in square steel pipe by the rare earth ferrosilicomagnesium inoculant alloy liquid melted and solidify cooling, get the ferrous alloy containing barium and silicon of 2% weight of molten iron, is melted by ferrous alloy containing barium and silicon, and spray is to square steel pipe surface, and cooling, obtains Integral ball agent bag; Be fixed in nodularization bag by Integral ball agent bag, on inovulant, uniform spreading covers perlite again, pours iron liquid.
CN201410848588.6A 2014-12-31 2014-12-31 High density soft sealing gate valve body and preparation method thereof Pending CN104633214A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410848588.6A CN104633214A (en) 2014-12-31 2014-12-31 High density soft sealing gate valve body and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410848588.6A CN104633214A (en) 2014-12-31 2014-12-31 High density soft sealing gate valve body and preparation method thereof

Publications (1)

Publication Number Publication Date
CN104633214A true CN104633214A (en) 2015-05-20

Family

ID=53212281

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410848588.6A Pending CN104633214A (en) 2014-12-31 2014-12-31 High density soft sealing gate valve body and preparation method thereof

Country Status (1)

Country Link
CN (1) CN104633214A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102912180A (en) * 2012-10-25 2013-02-06 无锡中彩新材料股份有限公司 Metallurgical proportional valve

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102912180A (en) * 2012-10-25 2013-02-06 无锡中彩新材料股份有限公司 Metallurgical proportional valve

Similar Documents

Publication Publication Date Title
AU2015353251B2 (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
CN1331626C (en) Low crack type high speed steel roll and its centrifugal casting method
CN105316565B (en) High-strength low-hardness ferritic nodular cast iron roller ring and manufacturing method thereof
CN100473737C (en) Wear-resistant bainite cast steel liner plate and manufacture process thereof
CN105483505A (en) Preparation method of high-strength gray cast iron cast cylinder block
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
CN102304672A (en) Low and medium alloy wear resistant steel and preparation method thereof
CN103966498B (en) A kind of high chromium white antifriction cast iron high-abrasive material and manufacture method thereof
CN102181782A (en) Method for manufacturing high-nickel austenitic ductile cast iron valve rod nut
CN104561797A (en) Pearlitic soft-sealing brake valve body easy to weld and preparation method thereof
CN104561756A (en) Soft real sluice valve body with excellent processability and preparation method of soft real sluice valve body
CN104633216A (en) Corrosion-resisting pearlite soft sealing gate valve body and preparing method thereof
CN104633214A (en) High density soft sealing gate valve body and preparation method thereof
CN104565487A (en) Pearlite flexible sealing gate valve for delivering hot water and preparation method thereof
CN104561757A (en) Boron-reinforced pearlite soft-seal brake valve body and preparing method thereof
CN106282759A (en) A kind of low chromium alloy iron casting and preparation method thereof
CN105132790A (en) Vanadium-containing carbidic austempered ductile iron and preparation method thereof
CN104565486A (en) Sewage pipe soft seal gate valve body and preparation method thereof
CN104561798A (en) Valve body of pearlite flexible sealing gate valve and preparation method of valve body
CN104532116A (en) High-hardness soft-seal brake valve body and preparation method thereof
CN104561760A (en) High-toughness soft-seal brake valve body and preparing method thereof
CN104633215A (en) Gallium-strengthening soft sealing gate valve body and manufacturing method thereof
CN104561758A (en) High-pressure-resistant 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: 20150520

RJ01 Rejection of invention patent application after publication