CN108070778A - Piston ring cast-iron alloy and its manufacturing method - Google Patents
Piston ring cast-iron alloy and its manufacturing method Download PDFInfo
- Publication number
- CN108070778A CN108070778A CN201611031435.8A CN201611031435A CN108070778A CN 108070778 A CN108070778 A CN 108070778A CN 201611031435 A CN201611031435 A CN 201611031435A CN 108070778 A CN108070778 A CN 108070778A
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- Prior art keywords
- cast
- iron
- piston ring
- carbon
- iron alloy
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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
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The present invention provides a kind of piston ring cast-iron alloy and its manufacturing method, the cast-iron alloy chemical composition weight ratio are：Carbon：3.0~3.4%；Silicon：2.0~2.4%；Manganese：0.7~1.0%；Phosphorus：0.25~0.35%；Sulphur：0.04~0.07%；Chromium：0.30~0.50%；Copper：0.40~0.60%；Antimony：0.015~0.025%；Remaining is iron and impurity.When manufacture, after cast iron melting finishes, before cast, by adding in antimony element in molten iron so that carbon silicone content accordingly reduces, obtained alloy is hypoeutectic cast iron (i.e. "+1/3 silicon of carbon " is less than 4.3%), therefore its elasticity modulus is significantly improved.
Description
Technical field
The present invention relates to a kind of alloy materials for manufacturing piston ring elliptical cylinder (blank).
Background technology
Present applicant previous application《By the technique of tubular ellipse blanks manufacture piston ring》Patent of invention, it is related to
And be blank shape, casting technique and pitch cutting.
It is cylinder pitch cutting again now since manufacture piston ring blank was monolithic originally, great change occurs for shape, it
Material will also have corresponding variation, and thing followed chemical composition will also have big change, to ensure the mechanical performance of its material
It meets the requirements.
Specifically, both knowing about for piston ring was contacted, its existing maximum fatal quality problems is：Abscission ring, i.e.,
Also when using installation, the breakage problem of piston ring is susceptible to, piston ring is directly resulted in and scraps, seriously affects product reputation,
Also very big trouble is brought to user, to this each piston ring manufacturing firm very headache, but is difficult to solve.
The content of the invention
The goal of the invention of the present invention is, a kind of piston ring cast-iron alloy and its manufacturing method is provided, to draw one most
Material prescription that is good, being suitble to elliptical cylinder blank, overcome thes problems, such as abscission ring.
To achieve the above object, the present invention provides a kind of piston ring cast-iron alloy, which is characterized in that its chemical component weight
Than for：
Carbon：3.0~3.4%；
Silicon：2.0~2.4%；
Manganese：0.7~1.0%；
Phosphorus：0.25~0.35%；
Sulphur：0.04~0.07%；
Chromium：0.30~0.50%；
Copper：0.40~0.60%；
Antimony：0.015~0.025%；
Remaining is iron and impurity.
The piston ring cast-iron alloy belongs to hypoeutectic cast iron.
In the piston ring cast-iron alloy, the cylinder wall thickness of the piston ring is 5 ± 0.5mm, then the carbon in alloy,
Silicon, manganese, chromium, the weight percent of copper for 3.3~3.4%, 2.3~2.4%, 0.8~1.0%, 0.30~0.45%, 0.40~
0.50%.
In the piston ring cast-iron alloy, the cylinder wall thickness of the piston ring is 6 ± 0.5mm, then the carbon in alloy,
Silicon, manganese, chromium, the weight percent of copper for 3.2~3.3%, 2.2~2.3%, 0.7~0.9%, 0.40~0.50%, 0.45~
0.55%.
In the piston ring cast-iron alloy, the cylinder wall thickness of the piston ring is 7 ± 0.5mm, then the carbon in alloy,
Silicon, manganese, chromium, the weight percent of copper for 3.0~3.2%, 2.0~2.2%, 0.7~0.8%, 0.45~0.50%, 0.50~
0.60%.
The present invention also provides a kind of methods for manufacturing above-mentioned piston ring cast-iron alloy, include the following steps：
1. prepare mold；
2. prepare material；
3. the cast iron melting of above-mentioned material is finished, mold is then cast to；
It is characterized in that：After cast iron melting finishes, before cast, antimony element is added in molten iron.
In the method for described manufacture piston ring cast-iron alloy, when cast iron melting finishes temperature reach 1520~1580 DEG C it
Between.
In the chemical composition of above-mentioned piston ring cast-iron alloy or piston ring elliptical cylinder, it is mainly characterized by adding " ladder "
Element to stablize the ferrite increased among metallographic, improves the mechanical performance of material, reduces ferritic appearance, make material
Can be more perfect, elasticity modulus is up to 11000Kg/mm2。
Specific embodiment
The present invention provides a kind of manufacturing method of piston ring elliptical cylinder blank (main embodiment), and preparation process is as follows：
1. mold is produced by the mold of elliptical cylinder using molding sand first；
2. prepare material：Major ingredient：Foundry iron, steel scrap, foundry returns (the unqualified blank that the molten iron of former stove meltings is formed
Or waste material)；Supplement alloy：Carburant, ferrosilicon, ferromanganese, ferrophosphorus, sulphur iron, cathode copper, terraced iron；
3. the cast iron melting of above-mentioned material is finished into (being optimal with 1550 DEG C between temperature reaches 1520~1580 DEG C),
Then mold is cast to, forms blank；Wherein, after cast iron melting finishes, before cast, antimony element is added in molten iron
(antimony element is in the form of antimony iron, and molten iron is added in when cast iron melting finishes and pours into ladle, be referred to as breeding plus
Enter).
The chemical component weight ratio of obtained piston ring cast-iron alloy is as follows：
Carbon：3.0~3.4%；
Silicon：2.0~2.4%；
Manganese：0.7~1.0%；
Phosphorus：0.25~0.35%；
Sulphur：0.04~0.07%；
Chromium：0.30~0.50%；
Copper：0.40~0.60%；
Antimony：0.015~0.025%；
Remaining is iron and impurity.
It in the chemical composition of above-mentioned piston ring cast-iron alloy, is mainly characterized by adding " ladder " element, increases gold to stablize
Ferrite in quite improves the mechanical performance of material, reduces ferritic appearance, makes material property more perfect, elasticity
Modulus is up to 11000Kg/mm2。
The material that existing cast-iron piston ring uses all is the cast iron of hypereutectic chemical composition, and elasticity modulus generally exists
9500Kg/mm2Left and right；And the piston ring cast-iron alloy of material manufacture of the present invention is used, due to adding " ladder " element so that carbon
Silicone content accordingly reduces, and belongs to hypoeutectic cast iron (i.e. "+1/3 silicon of carbon " is less than 4.3%), therefore its elasticity modulus obtains significantly
It is promoted.
In addition, being found by testing detection, the piston ring cast-iron alloy using the method for the present invention production has metallographic rank
High, the uniform excellent properties of hardness, hardness is in HRB99-103, A type graphite be evenly distributed, fine platy, a small amount of Type B
Graphite is not more than 10%, and matrix is mainly the pearlitic structrure of fine platy, and ferrite and cementite distribution do not exceed 3%.
The all interrupted netted tissues being evenly distributed of iron phosphide eutectic.
Applicant further found that should with the difference of the wall thickness (T) of piston ring (ellipse) cylinder, and respective change its chemistry
The different ratio of ingredient can obtain optimal mechanical performance, specific weight ratio such as following table：
In upper table：Sulphur, phosphorus, the weight ratio of antimony are constant, identical with the weight ratio in main embodiment.
As can be known from the above table：When cylinder wall thickness is bigger, carbon, silicon weight ratio should be closer to lower limit, manganese, chromium, copper
Weight ratio should be closer to the upper limit；When cylinder wall thickness is smaller, carbon, silicon weight ratio should be closer to the upper limit, manganese, chromium, copper
Weight ratio should be closer to lower limit.
Note：
Mark carbon and silicon equivalent on hypoeutectic cast iron：Carbon equivalent formula be respectively CE%=C%+1/3 (Si+P) % or
CE%=C%+1/3Si%.CE% values are hypereutectic composition higher than 4.26%；CE% is hypoeutectic ingredient less than 4.26%；
CE%=4.26% is then eutectic composition.(C- represents carbon.Si- represents element silicon.P- represents P elements, because content is very
It is few generally to ignore.CE- represents carbon equivalent).
Claims (7)
1. a kind of piston ring cast-iron alloy, which is characterized in that its chemical component weight ratio is：
Carbon：3.0~3.4%；
Silicon：2.0~2.4%；
Manganese：0.7~1.0%；
Phosphorus：0.25~0.35%；
Sulphur：0.04~0.07%；
Chromium：0.30~0.50%；
Copper：0.40~0.60%；
Antimony：0.015~0.025%；
Remaining is iron and impurity.
2. piston ring cast-iron alloy according to claim 1, which is characterized in that belong to hypoeutectic cast iron.
3. piston ring cast-iron alloy according to claim 1, which is characterized in that the cylinder wall thickness of the piston ring for 5 ±
0.5mm, then the weight percent of the carbon in alloy, silicon, manganese, chromium, copper for 3.3~3.4%, 2.3~2.4%, 0.8~1.0%,
0.30~0.45%, 0.40~0.50%.
4. piston ring cast-iron alloy according to claim 1, which is characterized in that the cylinder wall thickness of the piston ring for 6 ±
0.5mm, then the weight percent of the carbon in alloy, silicon, manganese, chromium, copper for 3.2~3.3%, 2.2~2.3%, 0.7~0.9%,
0.40~0.50%, 0.45~0.55%.
5. piston ring cast-iron alloy according to claim 1, which is characterized in that the cylinder wall thickness of the piston ring for 7 ±
0.5mm, then the weight percent of the carbon in alloy, silicon, manganese, chromium, copper for 3.0~3.2%, 2.0~2.2%, 0.7~0.8%,
0.45~0.50%, 0.50~0.60%.
6. a kind of method for manufacturing piston ring cast-iron alloy as described in claim 1, includes the following steps：
1. prepare mold；
2. prepare material；
3. the cast iron melting of above-mentioned material is finished, mold is then cast to；
It is characterized in that：After cast iron melting finishes, before cast, antimony element is added in molten iron.
7. the method for manufacture piston ring cast-iron alloy according to claim 6, which is characterized in that temperature when cast iron melting finishes
Degree reaches between 1520~1580 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611031435.8A CN108070778A (en) | 2016-11-18 | 2016-11-18 | Piston ring cast-iron alloy and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611031435.8A CN108070778A (en) | 2016-11-18 | 2016-11-18 | Piston ring cast-iron alloy and its manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108070778A true CN108070778A (en) | 2018-05-25 |
Family
ID=62160898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611031435.8A Pending CN108070778A (en) | 2016-11-18 | 2016-11-18 | Piston ring cast-iron alloy and its manufacturing method |
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| CN (1) | CN108070778A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1653202A (en) * | 2002-05-13 | 2005-08-10 | 斯堪尼亚有限公司 | Gray cast iron alloy and cast internal combustion engine component |
| CN103589944A (en) * | 2013-11-25 | 2014-02-19 | 青岛海之冠汽车配件制造有限公司 | Gray cast iron and production method thereof |
| CN105603294A (en) * | 2015-12-31 | 2016-05-25 | 河南纽威机械制造有限公司 | Method for improving wear resistance of centrifugal type nodular cast iron pump case |
-
2016
- 2016-11-18 CN CN201611031435.8A patent/CN108070778A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1653202A (en) * | 2002-05-13 | 2005-08-10 | 斯堪尼亚有限公司 | Gray cast iron alloy and cast internal combustion engine component |
| CN103589944A (en) * | 2013-11-25 | 2014-02-19 | 青岛海之冠汽车配件制造有限公司 | Gray cast iron and production method thereof |
| CN105603294A (en) * | 2015-12-31 | 2016-05-25 | 河南纽威机械制造有限公司 | Method for improving wear resistance of centrifugal type nodular cast iron pump case |
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Application publication date: 20180525 |