CN112680670A - Automobile valve body and preparation method thereof - Google Patents
Automobile valve body and preparation method thereof Download PDFInfo
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- CN112680670A CN112680670A CN202011574904.7A CN202011574904A CN112680670A CN 112680670 A CN112680670 A CN 112680670A CN 202011574904 A CN202011574904 A CN 202011574904A CN 112680670 A CN112680670 A CN 112680670A
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Abstract
The invention relates to a valve body for an automobile and a valve bodyThe preparation method comprises the following steps of preparing the valve body by weight percentage of Fe: (gray iron: 0.23, nodular iron 0.28%), Mg: 0.85%, Mn: 0.25%, Ni: 1.8%, Zn: 1.6%, B2O3：0.55%，SiO21.85 percent, TiC: 2.0%, Pt: 0.6%, Ti: 0.6%, Pb: 0.5 percent of the total weight of the alloy, and the balance of common iron Fe. The preparation method of the automobile valve body comprises the steps of raw material melting, casting pouring, shot blasting treatment and air tightness detection. The valve body for the automobile and the preparation method thereof have the advantages of excellent hardness performance, good wear resistance, small thermal expansion coefficient and low friction coefficient. Meanwhile, the composite material has the advantages of good mechanical property, long service life, safety, reliability and the like.
Description
Technical Field
The invention relates to the field of automobile part materials, and particularly provides an automobile valve body and a preparation method thereof aiming at the current automobile industry.
Background
In an automobile brake system, various cast iron metal parts are needed, such as a differential, a pneumatic valve, a brake valve and the like, and the valve body is usually formed by directly die-casting molten aluminum. In the preparation process, after an aluminum ingot is usually used for melting, the aluminum ingot is directly die-cast and molded, so that the production cost is high, the strength and the corrosion resistance of a workpiece are not high, the valve body is usually polished after a material handle of the valve body is cut by the conventional equipment, and the valve body is taken out of a warehouse for use after deburring, so that the phenomenon of unqualified air tightness is easily generated in the valve body taken out of the warehouse. When the valve body is used, the automobile cannot be completely braked, and great potential safety hazards exist. However, in the existing processing method, the detection means for detecting whether the valve body leaks air is poor, including the processing technology, the material problem of the valve body itself and the like, and due to the above problems, the automatic operation is difficult to realize, and the performance index and the service life of the valve body are difficult to ensure. Therefore, the braking safety of the automobile must be ensured by adjusting the material of the valve body, the processing method and the detection means through technical innovation, and the potential safety hazard is thoroughly eliminated.
Disclosure of Invention
The purpose of the invention is as follows: the invention mainly aims at the defects in the prior art and provides the automobile valve body with long service life, safety, reliability, high applicable temperature, wear resistance and good corrosion resistance and the preparation method thereof.
The technical scheme is as follows: in order to solve the technical problems, the technical problems are solved by adjusting the material formula and processing. The invention relates to an automobile valve body and a preparation method thereof, wherein the automobile valve body comprises the following components in percentage by weight: fe (wherein gray iron: 0.15-0.25%, nodular iron 0.20-0.3%), Mg: 0.75-1.0%, Mn: 0.2% -0.3%, Ni: 1.5% -2.2%, Zn: 1.0% -2.0%, B2O3：0.4%～0.65%，SiO2: 1.6% -2.6%, TiC: 1% -3%, Pt: 0.4-0.7%, Ti: 0.45-0.75%, Pb: 0.4 to 0.6 percent of the total weight of the alloy, and the balance of common Fe.
The composition comprises the following components in percentage by weight: fe: (wherein the gray iron is 0.2-0.25%, the nodular iron is 0.26-0.3%), Mg: 0.8% -1.0%, Mn: 0.22-0.28%, Ni: 1.6-2.0%, Zn: 1.2 to 1.8%, B2O3：0.46%～0.62%，SiO2: 1.7% -2.5%, TiC: 1.5% -2.8%, Pt: 0.45-0.65%, Ti: 0.5% -0.7%, Pb: 0.45 to 0.55 percent of the total weight of the alloy, and the balance of common Fe.
The composition comprises the following components in percentage by weight: fe: (gray iron: 0.23, nodular iron 0.28%), Mg: 0.85%, Mn: 0.25%, Ni: 1.8%, Zn: 1.6%, B2O3：0.55%，SiO21.85 percent, TiC: 2.0%, Pt: 0.6%, Ti: 0.6%, Pb: 0.5 percent of the total weight of the alloy, and the balance of common iron Fe.
A valve body for an automobile and a preparation method thereof are provided, and the preparation method comprises the following steps:
(1) melting raw materials: uniformly mixing the prepared raw materials of the components, adding the mixture into a melting furnace, heating to raise the temperature for melting, raising the internal temperature of the melting furnace to 750-800 ℃ after the raw materials are completely melted, preserving the heat for 5-10 minutes, and raising the temperature to 1120-1150 ℃ for refining.
(2) Pouring: and hoisting the molten iron to the upper part of a forming machine by a special trolley, placing a mold on the forming machine in advance, preheating the mold at the same time, heating to 400-500 ℃, slowly pouring the molten iron into the mold of the forming machine, and cooling for 2-3 hours to obtain the valve body blank casting.
(3) Shot blasting treatment: and (3) performing surface shot blasting treatment on the valve body casting blank by using a shot blasting machine, wherein shot blasting time is 15-20 minutes. The shot blasting machine adopts 5mn steel shots, and the shot blasting speed is controlled to be 90-110 nds.
(4) And (3) air tightness detection: and (3) adopting air tightness detection equipment to perform air tightness detection on the valve body workpiece, and rejecting air leakage waste products to obtain qualified valve body finished products.
The melting furnace is an intermediate frequency furnace.
The raw materials of the invention use a small amount of foundry returns iron blocks.
Has the advantages that: compared with the prior art, the invention has the advantages that: the valve body for the automobile, which is manufactured by the invention, has the advantages of high hardness, small thermal expansion coefficient, high wear resistance and excellent corrosion resistance; meanwhile, the valve body has good mechanical property by adjusting the material process formula and improving the process, prolongs the service life of the valve body and achieves the purpose of long-period safe operation.
Detailed Description
The invention is further illustrated by the following examples.
Example 1:
the invention relates to an automobile valve body and a preparation method thereof, wherein the automobile valve body comprises the following components in percentage by weight: (gray iron: 0.23, nodular iron 0.28%), Mg: 0.85%, Mn: 0.25%, Ni: 1.8%, Zn: 1.6%, B2O3：0.55%，SiO21.85 percent, TiC: 2.0%, Pt: 0.6%, Ti: 0.6%, Pb: 0.5 percent of the total weight of the alloy, and the balance of common iron Fe.
A valve body for an automobile and a preparation method thereof comprise the following steps:
(1) melting raw materials: the prepared raw materials of the components are uniformly mixed and then added into a melting furnace, the mixture is heated and heated for melting, after the raw materials are completely melted, the temperature inside the melting furnace is raised to 760 ℃, heat preservation is carried out for 6 minutes, and then the temperature is raised to 1130 ℃ for refining treatment.
(2) Pouring: and (3) hoisting the molten iron to the upper part of a forming machine through a special trolley, placing a mold on the forming machine in advance, preheating the mold at the same time, heating the temperature to 430 ℃, slowly pouring the molten iron into the mold of the forming machine, and cooling for 2.5 hours to obtain the valve body casting blank.
(3) Shot blasting treatment: and performing surface shot blasting treatment on the valve body casting blank by using a shot blasting machine, wherein shot blasting time is 16 minutes. The shot blasting machine adopts 5mn steel shots, and the shot blasting speed is controlled at 100 nds.
(4) And (3) air tightness detection: and (3) adopting air tightness detection equipment to perform air tightness detection on the valve body workpiece, and rejecting air leakage waste products to obtain qualified valve body finished products.
Example 2:
the invention relates to an automobile valve body and a preparation method thereof, wherein the automobile valve body comprises the following components in percentage by weight: (wherein the gray iron is 0.23 percent, and the nodular iron is 0.27 percent), Mg: 0.88%, Mn: 0.26%, Ni: 1.8%, Zn: 1.6%, B2O3：0.6%，SiO2: 1.9%, TiC: 2.3%, Pt: 0.56%, Ti: 0.55%, Pb: 0.52 percent and the balance of common Fe.
A valve body for an automobile and a preparation method thereof comprise the following steps:
(1) melting raw materials: the prepared raw materials of the components are uniformly mixed and then added into a melting furnace, the mixture is heated and heated for melting, after the raw materials are completely melted, the temperature inside the melting furnace is raised to 790 ℃, the heat is preserved for 8 minutes, and then the temperature is raised to 1150 ℃ for refining treatment.
(2) Pouring: and (3) hoisting the molten iron to the upper part of a forming machine by a special trolley, placing a mold on the forming machine in advance, preheating the mold at the same time, heating the temperature to 460 ℃, slowly pouring the molten iron into the mold of the forming machine, and cooling for 2.4 hours to obtain the valve body blank casting.
(3) Shot blasting treatment: and performing surface shot blasting treatment on the valve body casting blank by using a shot blasting machine, wherein shot blasting time is 18 minutes. The shot blasting machine adopts 5mn steel shots, and the shot blasting speed is controlled at 105 nds.
(4) And (3) air tightness detection: and (3) adopting air tightness detection equipment to perform air tightness detection on the valve body workpiece, and rejecting air leakage waste products to obtain qualified valve body finished products.
Example 3:
the invention is as describedThe automobile valve body and the preparation method thereof comprise the following components in percentage by weight: (wherein the gray iron is 0.25 percent, and the nodular iron is 0.26 percent), Mg: 0.88%, Mn: 0.27%, Ni: 1.9%, Zn: 1.7%, B2O3：0.61%，SiO2: 2.1%, TiC: 2.4%, Pt: 0.48%, Ti: 0.65%, Pb: 0.47 percent of iron, and the balance of common iron Fe.
A valve body for an automobile and a preparation method thereof comprise the following steps:
(1) melting raw materials: the prepared raw materials of the components are uniformly mixed and then added into a melting furnace, the mixture is heated and heated for melting, after the raw materials are completely melted, the temperature inside the melting furnace is raised to 790 ℃ for heat preservation for 10 minutes, and then the temperature is raised to 1140 ℃ for refining treatment.
(2) Pouring: and (3) hoisting the molten iron to the upper part of a forming machine by a special trolley, placing a mold on the forming machine in advance, preheating the mold at the same time, heating the temperature to 480 ℃, slowly pouring the molten iron into the mold of the forming machine, and cooling for 2.8 hours to obtain a valve body blank casting.
(3) Shot blasting treatment: and performing surface shot blasting treatment on the valve body casting blank by using a shot blasting machine, wherein shot blasting time is 20 minutes. The shot blasting machine adopts 5mn steel shots, and the shot blasting speed is controlled at 95 nds.
(4) And (3) air tightness detection: and (3) adopting air tightness detection equipment to perform air tightness detection on the valve body workpiece, and rejecting air leakage waste products to obtain qualified valve body finished products.
According to the valve body for the automobile and the preparation method thereof, the main mechanical property data of the valve body for the automobile are detected through 1-3 embodiments as follows:
| performance of | Tensile strength (MPa) | Yield strength (MPa) | Hardness (HB) | Elongation (%) |
| Detecting data | 385-390 | 330-355 | 97.5-99.5 | 15-17 |
The automobile valve body and the preparation method thereof have the advantages of good hardness performance and high wear resistance. And long service life can effectively reduce the operation cost of enterprises, can achieve the safe operation of a long period, and ensures the driving safety of automobiles.
The invention provides a thought and a method, and a plurality of methods and ways for realizing the technical scheme are provided, and the above description is only the preferred embodiment of the invention. All the components not specified in the present embodiment can be realized by the prior art.
Claims (6)
1. A valve body for an automobile and a preparation method thereof are characterized in that: the weight percentage of each component is as follows: fe (wherein gray iron: 0.15-0.25%, nodular iron 0.20-0.3%), Mg: 0.75-1.0%, Mn: 0.2% -0.3%, Ni: 1.5% -2.2%, Zn: 1.0% -2.0%, B2O3：0.4%～0.65%，SiO2: 1.6% -2.6%, TiC: 1% -3%, Pt: 0.4-0.7%, Ti: 0.45-0.75%, Pb: 0.4 to 0.6 percent of the total weight of the alloy, and the balance of common Fe.
2. The automotive valve body and the manufacturing method thereof according to claim 1 are characterized in that: the preferable proportion of each group by weight percentage is as follows: fe: (wherein the gray iron: 0.2-0.25%, ductile iron 0.26-0.3%), Mg: 0.8% -1.0%, Mn: 0.22-0.28%, Ni: 1.6-2.0%, Zn: 1.2 to 1.8%, B2O3：0.46%～0.62%，SiO2: 1.7% -2.5%, TiC: 1.5% -2.8%, Pt: 0.45-0.65%, Ti: 0.5% -0.7%, Pb: 0.45 to 0.55 percent of the total weight of the alloy, and the balance of common Fe.
3. The automotive valve body and the manufacturing method thereof according to claim 1 are characterized in that: the preferable proportion of each group by weight percentage is as follows: fe: (gray iron: 0.23, nodular iron 0.28%), Mg: 0.85%, Mn: 0.25%, Ni: 1.8%, Zn: 1.6%, B2O3：0.55%，SiO21.85 percent, TiC: 2.0%, Pt: 0.6%, Ti: 0.6%, Pb: 0.5 percent of the total weight of the alloy, and the balance of common iron Fe.
4. The automotive valve body and the manufacturing method thereof according to claim 1 are characterized in that: the melting furnace is an intermediate frequency furnace.
5. The automotive valve body and the manufacturing method thereof according to claim 1 are characterized in that: the raw materials of the invention use 2 to 5 weight percent of foundry returns iron blocks.
6. A valve body for an automobile and a manufacturing method thereof according to claim 1, 2 or 3, characterized in that: the preparation method comprises the following steps:
(1) melting raw materials: uniformly mixing the prepared raw materials of each component, adding the mixture into a melting furnace, heating to raise the temperature for melting, keeping the temperature for 5-10 minutes when the temperature in the melting furnace is raised to 750-800 ℃ after the raw materials are completely melted, and then raising the temperature to 1120-1150 ℃ for refining;
(2) pouring: hoisting the molten iron to the upper part of a forming machine by a special trolley, placing a mold on the forming machine in advance, preheating the mold at the same time, heating the temperature to 400-500 ℃, slowly pouring the molten iron into the mold of the forming machine, and cooling for 2-3 hours to obtain a valve body blank casting;
(3) shot blasting treatment: performing surface shot blasting treatment on the valve body casting blank by using a shot blasting machine, wherein shot blasting time is 15-20 minutes; the shot blasting machine adopts 5mn steel shots, and the shot blasting speed is controlled to be 90-110 nds;
(4) and (3) air tightness detection: and (3) adopting air tightness detection equipment to perform air tightness detection on the valve body workpiece, and rejecting air leakage waste products to obtain qualified valve body finished products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011574904.7A CN112680670A (en) | 2020-12-28 | 2020-12-28 | Automobile valve body and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011574904.7A CN112680670A (en) | 2020-12-28 | 2020-12-28 | Automobile valve body and preparation method thereof |
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| CN112680670A true CN112680670A (en) | 2021-04-20 |
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| CN202011574904.7A Pending CN112680670A (en) | 2020-12-28 | 2020-12-28 | Automobile valve body and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114054675A (en) * | 2021-11-20 | 2022-02-18 | 和县科嘉阀门铸造有限公司 | Casting process method of cast steel valve body |
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| CN110066947A (en) * | 2019-05-29 | 2019-07-30 | 无锡市诚天诺执行器制造有限公司 | A kind of pneumatic actuator piston material and preparation method thereof |
| CN110343972A (en) * | 2019-08-05 | 2019-10-18 | 宜兴市佳信数控科技有限公司 | A kind of rotary kiln hydraulic rectangle gear wheel and preparation method thereof |
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2020
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106862535A (en) * | 2017-02-28 | 2017-06-20 | 安徽瑞林精科股份有限公司 | A kind of automobile ACM valve body processing technologys |
| CN108396211A (en) * | 2018-05-30 | 2018-08-14 | 无锡市诚天诺执行器制造有限公司 | A kind of Electric Actuator cylinder material and preparation method thereof |
| CN108929994A (en) * | 2018-07-13 | 2018-12-04 | 宜兴市佳信数控科技有限公司 | A kind of large hydraulic press, molding machine special-purpose hydraulic cylinder and preparation method thereof |
| CN109735772A (en) * | 2018-12-26 | 2019-05-10 | 中能（天津）智能传动设备有限公司 | A kind of manufacturing process of high creep resistance reducer shell |
| CN110066947A (en) * | 2019-05-29 | 2019-07-30 | 无锡市诚天诺执行器制造有限公司 | A kind of pneumatic actuator piston material and preparation method thereof |
| CN110343972A (en) * | 2019-08-05 | 2019-10-18 | 宜兴市佳信数控科技有限公司 | A kind of rotary kiln hydraulic rectangle gear wheel and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114054675A (en) * | 2021-11-20 | 2022-02-18 | 和县科嘉阀门铸造有限公司 | Casting process method of cast steel valve body |
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