CN107321931A - A kind of spheroidal graphite cast-iron pipe die powder - Google Patents
A kind of spheroidal graphite cast-iron pipe die powder Download PDFInfo
- Publication number
- CN107321931A CN107321931A CN201710501140.0A CN201710501140A CN107321931A CN 107321931 A CN107321931 A CN 107321931A CN 201710501140 A CN201710501140 A CN 201710501140A CN 107321931 A CN107321931 A CN 107321931A
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- CN
- China
- Prior art keywords
- weight
- parts
- pipe die
- iron
- die powder
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- 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.)
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Classifications
-
- 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
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/18—Measures for using chemical processes for influencing the surface composition of castings, e.g. for increasing resistance to acid attack
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mold Materials And Core Materials (AREA)
- Powder Metallurgy (AREA)
Abstract
This case discloses a kind of spheroidal graphite cast-iron pipe die powder, includes the material of following parts by weight：The silicon of 50~52 parts by weight, the calcium of 30~32 parts by weight, the strontium of 16~18 parts by weight, the sulphur of 0.1~0.3 parts by weight, the vanadium of 2~4 parts by weight, the boron of 1~3 parts by weight, the cobalt of 1~3 parts by weight, the barium sulphide of 0.5~1.5 parts by weight, the iron sulfide of 0.05~0.1 parts by weight, the platinum of 0.05~0.1 parts by weight, the tungsten oxide of the indium of 0.05~0.1 parts by weight and 0.005~0.01 parts by weight.This case to spheroidal graphite cast-iron with pipe die powder formula by being improved and optimizated, introduce a variety of elements with synergistic effect, effectively increase the Oxygen potential and number of graphite ball of pipe die powder, reduce the stomatal number and pinhole number of Surface of Nodular Cast Iron Pipe, the formula reduces the usage amount to noble metal simultaneously, both production cost is reduced, the destruction to environment is reduced again.
Description
Technical field
The present invention relates to a kind of pipe die powder, more particularly to a kind of pipe die powder for being used to produce ductile iron pipe.
Background technology
When producing ductile iron pipe, a number of carbon can be contained, this carbon can combine closely with iron, and carbon is in solidification
Cast iron in form be very important for the performance of cast iron pipe.If this carbon is in carbonization Iron activiation, the cast iron quilt
Referred to as white iron, it is hard and crisp, and practicality is very poor.If carbon is in graphite state, the cast iron is soft, it is easy to process, it is referred to as gray cast iron,
It is practical.Graphite state can be divided into sheet, compact shape and spherical again, and wherein spherical-like morphology can show highest intensity and most
The cast iron of extending form.Therefore in Solidification of Cast Iron, it need to reach ductile iron pipe by the booster action of additive
To preferable effect.Generally, the quality of additive is weighed with the Oxygen potential of ductile iron pipe, number of graphite ball and pin hole rate.
Pipe die powder is the important additives for producing ductile iron pipe, with protection pipe die, the favourable demoulding, can be effectively reduced
Degree of supercooling, the formation for suppressing carbide, the stomata and pin hole that breed, eliminate cast tube outer surface, nodularization, extension pipe die powder use the longevity
The multiple efficacies such as life, are last one of critical materials in ductile iron pipe moulding process, with high content of technology, manufacture difficulty is big.Pipe
The whether excellent of mould silty amount will directly influence the quality, qualification rate and production efficiency of product.Prior art is used mostly
Several raw material are after Mechanical Crushing, and directly cold machining process of the mixing with powder exists to make pipe die powder because it is formulated
Certain defect, causes several additives can not play synergy, so that the performance of pipe die powder is unstable, Oxygen potential is inclined
Low, number of graphite ball is less, and pin hole rate is higher.Significantly the subtracting due to iron water amount especially in the production for small-bore ductile iron pipe
It is few, cause ductile iron pipe casting flaw showed increased.
The content of the invention
For above-mentioned technological deficiency, there is high Oxygen potential, high number of graphite ball and low it is an object of the invention to provide one kind
Synergy can be produced between additive in the spheroidal graphite cast-iron of pin hole rate pipe die powder, the pipe die powder, to help pipe die powder to send out
Wave more efficient, stable function.
Technical scheme is summarized as follows：
A kind of spheroidal graphite cast-iron pipe die powder, includes the material of following parts by weight：
Preferably, described spheroidal graphite cast-iron pipe die powder, in addition to the barium sulphide of 0.5~1.5 parts by weight and 0.05~
The iron sulfide of 0.1 parts by weight.
Preferably, described spheroidal graphite cast-iron pipe die powder, includes the platinum of 0.05~0.1 parts by weight.
Preferably, described spheroidal graphite cast-iron pipe die powder, includes the indium of 0.05~0.1 parts by weight.
Preferably, described spheroidal graphite cast-iron pipe die powder, includes the tungsten oxide of 0.005~0.01 parts by weight.
The beneficial effects of the invention are as follows：By being improved and optimizated to spheroidal graphite cast-iron with pipe die powder formula, a variety of tools are introduced
There is the element of synergistic effect, effectively increase the Oxygen potential and number of graphite ball of pipe die powder, reduce the gas of Surface of Nodular Cast Iron Pipe
Hole count and pinhole number, while the formula reduces the usage amount to noble metal, both reduce production cost, reduce again to environment
Destruction.
Embodiment
With reference to embodiment, the present invention is described in further detail, to make those skilled in the art with reference to specification
Word can be implemented according to this.
This case proposes the spheroidal graphite cast-iron pipe die powder of an embodiment, includes the material of following parts by weight：
As another embodiment of this case, wherein, include the barium sulphide and 0.05~0.1 parts by weight of 0.5~1.5 parts by weight
Iron sulfide.Barium sulphide and iron sulfide can cooperate with the formation for suppressing cementite, reduce the chilling tendency of cast iron pipe, while improving ball
Rate and number of graphite ball.But more preferably acted synergistically to be played with other components, the addition of barium sulphide and iron sulfide should be by
Limitation.
As the another embodiment of this case, wherein, include the platinum of 0.05~0.1 parts by weight.A small amount of platinum can be reduced effectively
Stomata or pin hole inside cast iron pipe, but the addition of platinum do not change arbitrarily, and it should be limited in an a small range, surpass
Crossing this scope will all cause pin hole rate to rise, and slightly affected Oxygen potential and number of graphite ball.
As the another embodiment of this case, wherein, include the indium of 0.05~0.1 parts by weight.Experiment finds that a small amount of indium can
To lift the quality of pipe die powder, effect especially is improved substantially to Oxygen potential and number of graphite ball, certainly, tested it has also been found that indium also can
Improve the pin hole of surface of cast iron to a certain extent.
As the another embodiment of this case, wherein, include the tungsten oxide of 0.005~0.01 parts by weight.Tungsten oxide is a kind of
Fusing point conditioning agent, the materials of different melting points can be remained stable by it at high temperature, and fusing point is differed into larger material most
Whole fusing point is reduced in less temperature range, and to ensure the validity of pipe die mealiness energy, the embodiment in test result is exactly
Oxygen potential, number of graphite ball get a promotion, and pin hole rate declines.
Following table lists the concrete composition and its performance parameter of not be the same as Example：
Following table lists the concrete composition and its performance parameter of different comparative examples：
Although embodiment of the present invention is disclosed as above, it is not restricted in specification and embodiment listed
With it can be applied to various suitable the field of the invention completely, can be easily for those skilled in the art
Other modification is realized, therefore under the universal limited without departing substantially from claim and equivalency range, the present invention is not limited
In specific details.
Claims (5)
1. a kind of spheroidal graphite cast-iron pipe die powder, includes the material of following parts by weight：
2. spheroidal graphite cast-iron according to claim 1 pipe die powder, it is characterised in that also include the sulphur of 0.5~1.5 parts by weight
Change barium and the iron sulfide of 0.05~0.1 parts by weight.
3. spheroidal graphite cast-iron according to claim 1 pipe die powder, it is characterised in that also including 0.05~0.1 parts by weight
Platinum.
4. spheroidal graphite cast-iron according to claim 1 pipe die powder, it is characterised in that also including 0.05~0.1 parts by weight
Indium.
5. spheroidal graphite cast-iron according to claim 1 pipe die powder, it is characterised in that also including 0.005~0.01 parts by weight
Tungsten oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710501140.0A CN107321931A (en) | 2017-06-27 | 2017-06-27 | A kind of spheroidal graphite cast-iron pipe die powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710501140.0A CN107321931A (en) | 2017-06-27 | 2017-06-27 | A kind of spheroidal graphite cast-iron pipe die powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107321931A true CN107321931A (en) | 2017-11-07 |
Family
ID=60197116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710501140.0A Pending CN107321931A (en) | 2017-06-27 | 2017-06-27 | A kind of spheroidal graphite cast-iron pipe die powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107321931A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1077229A (en) * | 1992-04-06 | 1993-10-13 | 德州机床厂 | Cast-iron compound inoculant |
| CN101956039A (en) * | 2010-10-12 | 2011-01-26 | 禹州市恒利来合金厂 | Pipe die powder for centrifugally casting nodular cast iron pipe and preparation process thereof |
| CN104195417A (en) * | 2014-08-18 | 2014-12-10 | 成都宏源铸造材料有限公司 | Preparation method of pipe powder for nodular cast iron and application of pipe powder |
| CN105220059A (en) * | 2015-10-30 | 2016-01-06 | 成都宏源铸造材料有限公司 | A kind of preparation method of spheroidal graphite cast iron nucleating agent and application thereof |
-
2017
- 2017-06-27 CN CN201710501140.0A patent/CN107321931A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1077229A (en) * | 1992-04-06 | 1993-10-13 | 德州机床厂 | Cast-iron compound inoculant |
| CN101956039A (en) * | 2010-10-12 | 2011-01-26 | 禹州市恒利来合金厂 | Pipe die powder for centrifugally casting nodular cast iron pipe and preparation process thereof |
| CN104195417A (en) * | 2014-08-18 | 2014-12-10 | 成都宏源铸造材料有限公司 | Preparation method of pipe powder for nodular cast iron and application of pipe powder |
| CN104946960A (en) * | 2014-08-18 | 2015-09-30 | 成都宏源铸造材料有限公司 | Preparation method of pipe mold powder for nodular cast iron and application thereof |
| CN105220059A (en) * | 2015-10-30 | 2016-01-06 | 成都宏源铸造材料有限公司 | A kind of preparation method of spheroidal graphite cast iron nucleating agent and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 樊自田: "《铸造质量控制应用技术》", 30 June 2015, 机械工业出版社 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171107 |