CN110434292A - Two phase stainless steel valve body casting technique - Google Patents
Two phase stainless steel valve body casting technique Download PDFInfo
- Publication number
- CN110434292A CN110434292A CN201810415311.2A CN201810415311A CN110434292A CN 110434292 A CN110434292 A CN 110434292A CN 201810415311 A CN201810415311 A CN 201810415311A CN 110434292 A CN110434292 A CN 110434292A
- Authority
- CN
- China
- Prior art keywords
- riser
- valve body
- casting technique
- stainless steel
- phase stainless
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/103—Multipart cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve Housings (AREA)
Abstract
The present invention provides a kind of two phase stainless steel valve body casting technique, which uses sand casting process, in which: formative technology uses vertical core assembling technology；Running gate system uses bottom filling deluge system；Riser includes 4 open risers and 2 blind risers, and the open riser is equally distributed top riser, and the blind riser is the bottom side riser being arranged symmetrically, and the blind riser and open riser misplace 45 degree.Using above-mentioned casting technique, 90% or more the impurity generated in casting process can be discharged from riser, remaining to be also conducive to float on machined surface, be easily removed, it is ensured that the inherent quality of valve body；Gas discharge is smooth, avoids the generation of blowhole, it is ensured that the air-tightness of valve body.
Description
Technical field
The present invention relates to valve body casting techniques, more particularly to a kind of two phase stainless steel valve body casting technique.
Background technique
Valve body is a main parts size in valve, is processed usually by way of casting or forging.For making
With the more severe valve body of environment, such as the valve body to work in the seawater for a long time, wear-resisting, anti-corrosion, pressure-resistant, mechanical performance etc. are equal
There is high requirement, therefore the material used is mostly two phase stainless steel.The two-phase stainless Steel material has following characteristic: solidification temperature
It is wide (125-140 DEG C) to spend range, is easy to produce shrinkage cavity and porosity；The high directivity of casting solidification crystallization, and casting is deposited in as cast condition
In a large amount of σ brittlement phases, it is easy to produce hot tearing；The defects of molten steel gettering ability is strong, and casting is also easy to produce pin hole and rimhole.Especially
It is the bigger situation of body size, it is easier to generate the casting flaws such as hot tearing, stomata and shrinkage cavity and porosity, casting is caused to scrap.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is at least that provide a kind of two phase stainless steel valve body
Casting technique is lacked with eliminating or reducing the castings such as crackle, shrinkage cavity and porosity and stomata in two phase stainless steel valve body casting process
It falls into.
In order to achieve the above objects and other related objects, an embodiment of the invention provides a kind of two phase stainless steel valve
Body casting technique, using sand casting process, for the casting with cylindrical body and the valve body of axial central through hole,
In: formative technology uses vertical core assembling technology；Running gate system uses bottom filling deluge system；Riser includes 4 open risers and 2
Blind riser, the open riser are equally distributed top riser, and the blind riser is the bottom side riser being arranged symmetrically, described dark
Riser and open riser misplace 45 degree.
The above-mentioned technical proposal that embodiment of the present invention provides, can effectively solve the problem that in two phase stainless steel valve body casting process
The casting flaws such as crackle, shrinkage cavity shrinkage porosity and stomata.
Detailed description of the invention
Fig. 1 is shown as valve body the schematic diagram of the section structure；
Fig. 2 is shown as vertical group of core design diagram of casting technique of the present invention；
Fig. 3 is shown as the Feeder Design schematic diagram of casting technique of the present invention；
Fig. 4 is shown as the vent design schematic diagram of casting technique of the present invention.
Component label instructions
1 valve body
2 main sand cores
3 heat insulating open risers
4 insulation blind risers
5 bright chills
6 dark chills
7 bottom filling Shower gating systems
8 points of mould parting lines
9 air guide ropes
10 ventholes
11 cylindrical bodies
12 central through holes
Hole on 13
14 lower opening
A disperses discharge directions
The center B discharge directions
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily.
It should be clear that structure, ratio, size etc. depicted in this specification attached drawing, only to cooperate disclosed in specification
Content be not intended to limit the invention enforceable qualifications, therefore not so that those skilled in the art understands and reads
Has technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing institute of the present invention
Under the effect of capable of generating and the purpose that can reach, the range that disclosed technology contents can be covered should all be still fallen in
It is interior.Meanwhile cited such as "upper" in this specification, "lower", "left", "right", " centre " and " one " term, also only just
In being illustrated for narration, rather than to limit the scope of the invention, relativeness is altered or modified, without substantive change
Under more technology contents, when being also considered as the enforceable scope of the present invention.
The targeted valve body of the present invention is the valve body with cylindrical body and axial central through hole, with peculiar to vessel shown in Fig. 1
For water-inflow and drain valve.As shown in Figure 1, the valve body of the water-inflow and drain valve peculiar to vessel includes cylindrical body 11 and along 11 axis of cylindrical body
To central through hole 12, upper hole 13 and lower opening 14 are then for install the channel for closing valve transmission device in figure.
The formative technology of this valve body routine is horizontal technique, and by the studying for a long period of time of inventor, repetition test discovery,
Using two phase stainless steel as founding materials, especially for the part of larger size, traditional horizontal type shaping
Technique is that casting is caused to generate the casting flaws such as hot tearing, stomata and shrinkage cavity and porosity, so that the major reason that casting is scrapped.Therefore,
The formative technology of two phase stainless steel valve body casting technique provided by the invention uses vertical core assembling technology, to overcome drawbacks described above.
So-called horizontal core assembling technology refers to that main sand core (i.e. across the sand core of valve body central through hole) is horizontal, consistent with direction shown in Fig. 1, and
The present invention then uses the vertical core assembling technology of main sand core vertically-arranged.
Illustrate valve body casting technique of the present invention below with reference to Fig. 2-4.
As shown in Fig. 2, the present invention uses vertical core assembling technology, main sand core 2 is vertically arranged, then valve body 1 after molding is also
It is vertical, i.e., it is erect along the axial direction of cylindrical body.Molding sand preferably uses alkalescent phenol resin sand, the hot deformability of this kind of molding sand
It is good, it is possible to reduce Solid State Contraction resistance, to reduce hot cracking tendency；And the molding sand is not nitrogenous, it is possible to reduce molding sand is in high temperature
Under gas forming amount.Running gate system uses bottom filling deluge system 7, i.e., enters bottom cross gate by sprue using molten metal, so
The pouring type that type chamber is entered back into after ingate is upwardly by cross gate afterwards.It is flat to fill type using bottom filling deluge system 7
Surely, conducive to the discharge of gas and impurity.
Riser uses 4 open risers and 2 blind risers.4 open risers are uniformly distributed top riser, as shown in figure 3,4
Open riser is uniformly distributed on a circumference.2 blind risers are the bottom side riser being arranged symmetrically, and with top riser dislocation 45
Degree.This arrangement had not only ensured the feeding of casting, but also was conducive to casting uniform shrinkage.Above-mentioned open riser and blind riser can be adopted
With insulated feeder, recovery rate so can be improved, while reducing projected area, reduce thermal center, be conducive to feeding, reduce crackle and incline
To.
To improve riser feeding distance, and the tendency that Quench increases hot tearing is reduced, bottom uses dark chill 6, is located at two
Between blind riser, it is preferred to use gray cast iron.Mild steel is then used to make bright chill 5 for local heat energy-saving position, as shown in Figure 2.
Exhaust concentrates exhaust to combine using outer scattered exhaust and center, is more advantageous to the discharge of gas.Such as Fig. 4 institute
Show, main sand core 2, i.e., intermediate sand core uses the center being vented along the direction B to concentrate exhaust mode, and external sand core is used along the direction A
The dispersion exhaust mode of exhaust.
In order to increase casting mold deformability, also asbestos can be placed at sand core center.
Deoxidier is changed to silicon calcium powder by aluminium powder, prevents aluminium from reacting with nitrogen and generates aluminium nitride and increase hot cracking tendency.
In addition, all raw material can pass through impeller blasting, used after baking.
Using above-mentioned casting technique provided by the invention, 90% or more the impurity generated in casting process can be from riser
Middle discharge, it is remaining to be also conducive to float on machined surface, it is easily removed, it is ensured that the inherent quality of valve body；Gas discharge is smooth, avoids
The generation of blowhole, it is ensured that the air-tightness of valve body.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (8)
1. a kind of two phase stainless steel valve body casting technique, using sand casting process, for having in cylindrical body and axial direction
The casting of the valve body of heart through-hole, it is characterised in that:
Formative technology uses vertical core assembling technology；
Running gate system uses bottom filling deluge system；
Riser includes 4 open risers and 2 blind risers, and the open riser is equally distributed top riser, and the blind riser is
The bottom side riser being arranged symmetrically, the blind riser and open riser misplace 45 degree.
2. two phase stainless steel valve body casting technique according to claim 1, it is characterised in that:
The open riser and/or the blind riser are insulated feeder.
3. two phase stainless steel valve body casting technique according to claim 1, it is characterised in that:
The casting technique is using alkalescent phenol resin sand as molding sand.
4. two phase stainless steel valve body casting technique according to claim 1, it is characterised in that:
Bright chill is arranged in heat energy-saving position, and dark chill is arranged between the blind riser of bottom two.
5. two phase stainless steel valve body casting technique according to claim 4, it is characterised in that:
Bright chill uses mild steel, and dark chill uses gray cast iron.
6. two phase stainless steel valve body casting technique according to claim 1, it is characterised in that:
It is exhausted in such a way that outer scattered exhaust and center concentrate exhaust to combine.
7. two phase stainless steel valve body casting technique according to claim 1, it is characterised in that:
Place asbestos in sand core center.
8. two phase stainless steel valve body casting technique according to claim 1, it is characterised in that:
The deoxidier that the casting technique uses is silicon calcium powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810415311.2A CN110434292A (en) | 2018-05-03 | 2018-05-03 | Two phase stainless steel valve body casting technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810415311.2A CN110434292A (en) | 2018-05-03 | 2018-05-03 | Two phase stainless steel valve body casting technique |
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| Publication Number | Publication Date |
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| CN110434292A true CN110434292A (en) | 2019-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810415311.2A Pending CN110434292A (en) | 2018-05-03 | 2018-05-03 | Two phase stainless steel valve body casting technique |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113798446A (en) * | 2021-09-18 | 2021-12-17 | 洛阳中重铸锻有限责任公司 | Water explosion-free preparation method for super duplex stainless steel valve body casting for circulating water pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161077A (en) * | 2011-04-09 | 2011-08-24 | 江苏金石铸锻有限公司 | Valve body casting method of expansion valve |
| CN103418750A (en) * | 2013-07-22 | 2013-12-04 | 洛阳市兴荣工业有限公司 | Spherical valve main body casting technology |
| CN103433434A (en) * | 2013-09-02 | 2013-12-11 | 山东墨龙石油机械股份有限公司 | Method for casting valve body of flat gate valve |
| CN103658541A (en) * | 2013-12-19 | 2014-03-26 | 中国船舶重工集团公司第十二研究所 | Method for setting riser on casting of ship diesel engine body |
| CN104014745A (en) * | 2014-06-18 | 2014-09-03 | 唐山东方华盛优耐高科股份有限公司 | Large cast steel long cylindrical piece feeding process method |
| CN105757308A (en) * | 2016-04-22 | 2016-07-13 | 南通华东油压科技有限公司 | Hydraulic pilot valve body casting and die thereof |
-
2018
- 2018-05-03 CN CN201810415311.2A patent/CN110434292A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161077A (en) * | 2011-04-09 | 2011-08-24 | 江苏金石铸锻有限公司 | Valve body casting method of expansion valve |
| CN103418750A (en) * | 2013-07-22 | 2013-12-04 | 洛阳市兴荣工业有限公司 | Spherical valve main body casting technology |
| CN103433434A (en) * | 2013-09-02 | 2013-12-11 | 山东墨龙石油机械股份有限公司 | Method for casting valve body of flat gate valve |
| CN103658541A (en) * | 2013-12-19 | 2014-03-26 | 中国船舶重工集团公司第十二研究所 | Method for setting riser on casting of ship diesel engine body |
| CN104014745A (en) * | 2014-06-18 | 2014-09-03 | 唐山东方华盛优耐高科股份有限公司 | Large cast steel long cylindrical piece feeding process method |
| CN105757308A (en) * | 2016-04-22 | 2016-07-13 | 南通华东油压科技有限公司 | Hydraulic pilot valve body casting and die thereof |
Non-Patent Citations (6)
| Title |
|---|
| 《铸造工艺基础》联合编写组: "《铸造工艺基础》", 31 May 1979, 北京出版社 * |
| 中国机械工程学会铸造专业学会: "《铸造手册 第5卷 铸造工艺》", 31 October 1994, 机械工业出版社 * |
| 宋道春: "汽轮机阀体铸造工艺优化", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
| 杨双平: "《冶金炉料处理工艺》", 30 April 2008, 冶金工业出版社 * |
| 王引真: "《材料工程基础》", 28 February 2015, 中国石油大学出版社 * |
| 郁兆昌: "《金属工艺学实习》", 31 July 2001, 高等教育出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113798446A (en) * | 2021-09-18 | 2021-12-17 | 洛阳中重铸锻有限责任公司 | Water explosion-free preparation method for super duplex stainless steel valve body casting for circulating water pump |
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Application publication date: 20191112 |