CN111230045A - Casting process of full mold casting type tire mold casting - Google Patents
Casting process of full mold casting type tire mold casting Download PDFInfo
- Publication number
- CN111230045A CN111230045A CN202010229356.8A CN202010229356A CN111230045A CN 111230045 A CN111230045 A CN 111230045A CN 202010229356 A CN202010229356 A CN 202010229356A CN 111230045 A CN111230045 A CN 111230045A
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- Prior art keywords
- pouring
- casting
- percent
- sprue
- feeding
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Classifications
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- 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
- B22C9/082—Sprues, pouring cups
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- 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
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
- B22D15/02—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of cylinders, pistons, bearing shells or like thin-walled objects
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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
- C22C37/06—Cast-iron alloys containing chromium
- C22C37/08—Cast-iron alloys containing chromium with nickel
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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
Abstract
The invention aims to provide a casting process of a full mold casting tire mold type casting, which improves the carbon equivalent of molten iron by controlling material components, is in a hypereutectic component, and properly controls the component proportion of an alloy element, thereby reducing the contraction tendency of the molten iron; the sprue of the pouring system is set to be the highest point in a pouring state, so that the sprue has the functions of pouring and feeding, and the sprue can be used as a riser for feeding; an inner pouring gate of the pouring system is arranged to avoid the joint part of the large plane with the irregular bottom surface and the rib plate; the slope with the inclination angle of 10 degrees is arranged to be matched with the pouring system, so that the pouring system is in an inclined state during pouring, and the pouring system has obvious characteristics of pouring while feeding; the reasonable chill arrangement ensures that the casting is solidified more uniformly, and the shrinkage cavities and the shrinkage porosity of the cross-shaped or T-shaped structure are reduced; the pouring temperature is 1390 +/-5 ℃, and premature solidification of the feeding channel is prevented, so that the supply amount at the thick wall is insufficient.
Description
Technical Field
The invention belongs to the field of full mold casting, and particularly relates to a casting process of full mold casting fetal membrane castings.
Background
The general structure of the ductile iron fetal membrane type casting is complicated, the connection of the thin and thick walls of the casting is turned, various connection of the rib plates with equal thickness and the rib plates are mostly in a cross-shaped or T-shaped structure with clear edges and corners, the defects of shrinkage cavities, shrinkage porosity and the like are easily caused, the wall thickness of the casting is thin, the bottom surface of the casting has a large plane structure with an irregular shape, and the shrinkage cavities are easily generated in the center part.
In the existing production process of the ductile iron fetal membrane castings, because the cross-shaped or T-shaped structures and the irregular large plane structures have no good control measures, shrinkage porosity/shrinkage cavity defects easily occur, and serious shrinkage cavities not only have extremely high repair welding repair cost, but also influence the strength of the castings. On the other hand, because the ductile iron fetal membrane type casting has a single structure and is relatively thin, the cooling speed of the casting is relatively high, the graphitization is easily insufficient, the self-feeding effect of the casting is affected, riser feeding is adopted, although the situation of shrinkage cavity and shrinkage porosity can be effectively controlled, the process yield is relatively low, and the cost is relatively high, so that a better method for improving the process yield of the iron casting while ensuring the quality of the casting is sought. Therefore, it is necessary to solve this problem.
Disclosure of Invention
In order to solve the problems, the invention provides a casting process of a full-mold casting tire mold casting, which improves the carbon equivalent of molten iron by controlling material components, is in a hypereutectic component, and properly controls the component proportion of a next alloy element so as to reduce the shrinkage tendency of the molten iron, sets a sprue gate of a pouring system as the highest point in the pouring state, has the function of feeding while pouring, can use the sprue gate as a riser to feed, sets an inner sprue gate of the pouring system to avoid the joint part of an irregular large plane on the bottom surface and a rib plate, sets a slope surface with an inclination angle of 10 degrees to be matched with the pouring system, ensures that the pouring system is in an inclined state during pouring, ensures that the pouring system has obvious feeding while pouring characteristics, reasonably sets cold iron to ensure that the casting is more uniformly solidified, reduces shrinkage porosity of a cross-shaped or T-shaped structure, has a pouring temperature of 1390 +/-5 ℃, the premature solidification of the feeding channel is prevented, the supply quantity at the thick wall is insufficient, and the problems in the background technology are solved.
The invention aims to provide a casting process for a full mold casting type tire mold casting, which comprises the following casting materials:
3.6 to 3.8 percent of C, 2.3 to 2.5 percent of Si, 0.55 to 0.65 percent of Mn, 0.1 to 0.12 percent of Cr0.1, 0.45 to 0.55 percent of Mo, 0.85 to 0.9 percent of Cu, 0.9 to 1.0 percent of Ni, 0.04 to 0.06 percent of Mg, 0.02 to 0.04 percent of Re, less than or equal to 0.05 percent of P, less than or equal to 0.012 percent of S, and the balance of Fe and inevitable impurity elements;
the sprue gate of the pouring system is arranged to avoid the large irregular plane on the bottom surface and the joint part of the rib plate, the sprue gate is arranged to be the highest point in the pouring state, the sprue gate has the function of pouring and feeding, and the sprue gate can be used as a riser for feeding;
manufacturing a slope surface with an inclination angle according to the structure of the fetal membrane, wherein the slope surface is matched with a pouring system so that the slope surface is in an inclined state during pouring, and a sprue is in an inclined state;
firstly, making a model, then filling sand into the model for modeling, carrying out CAE simulation analysis on a casting model during modeling, and analyzing and reasonably placing chillers according to a simulation result;
and after the model is placed and molded, mixing the pouring materials, pouring through a pouring system, and cooling to obtain a full-mold casting fetal membrane casting.
The further improvement lies in that: the pouring temperature is 1390 +/-5 ℃ to prevent the feeding channel from being solidified prematurely, so that the supply amount of the thick wall is insufficient.
The further improvement lies in that: the inclination angle of the slope surface is 10 degrees.
The further improvement lies in that: and (3) modeling the casting before pouring, and placing sand-isolating chilling blocks at the hot spot part of the bottom surface of the casting according to simulation result analysis during modeling so that the shrinkage and solidification of the casting are more uniform.
The further improvement lies in that: the inclined angle end of the slope surface is close to the sprue, and the bottom of the slope surface is close to the inner sprue.
The invention has the beneficial effects that: the method improves the carbon equivalent of the molten iron by controlling the material components, is in a hypereutectic component, and properly controls the component proportion of the next alloy element, thereby reducing the shrinkage tendency of the molten iron; the sprue of the pouring system is set to be the highest point in a pouring state, so that the sprue has the functions of pouring and feeding, and the sprue can be used as a riser for feeding; an inner pouring gate of the pouring system is arranged to avoid the joint part of the large plane with the irregular bottom surface and the rib plate; the slope with the inclination angle of 10 degrees is arranged to be matched with the pouring system, so that the pouring system is in an inclined state during pouring, and the pouring system has obvious characteristics of pouring while feeding; the reasonable chill arrangement ensures that the casting is solidified more uniformly, and the shrinkage cavities and the shrinkage porosity of the cross-shaped or T-shaped structure are reduced; the pouring temperature is 1390 +/-5 ℃, and premature solidification of the feeding channel is prevented, so that the supply amount at the thick wall is insufficient.
Drawings
FIG. 1 is a schematic view of the gating system of the present invention engaged with a slope.
FIG. 2 is a schematic view of the gating system of the present invention.
Fig. 3 is a schematic view of the ramp of the present invention.
Wherein: 1-straight pouring gate, 2-inner pouring gate and 3-slope.
Detailed Description
For the purpose of enhancing understanding of the present invention, the present invention will be further described in detail with reference to the following examples, which are provided for illustration only and are not to be construed as limiting the scope of the present invention.
As shown in fig. 1 to 3, the present embodiment provides a casting process of a full mold casting type carcass,
firstly, making a model, then filling sand into the model for modeling, carrying out CAE simulation analysis on a casting model during modeling, and analyzing and reasonably placing chillers according to a simulation result;
after the model is placed and molded, pouring materials are mixed and poured through a pouring system, and a full mold casting fetal membrane casting is obtained after cooling;
the casting material comprises:
3.7% of C, 2.4% of Si, 0.60% of Mn, 0.11% of Cr0.11%, 0.50% of Mo, 0.87% of Cu, 0.95% of Ni, 0.05% of Mg, 0.03% of Re0.05%, 0.05% of P, 0.012% of S, and the balance of Fe and inevitable impurity elements;
the inner pouring gate 2 of the pouring system is arranged to avoid the joint part of the irregular large plane on the bottom surface and the rib plate, the sprue 1 is arranged to be the highest point in a pouring state, the function of pouring and feeding is achieved, and the sprue 1 can be used as a riser for feeding;
manufacturing a slope surface 3 with an inclination angle according to the structure of a fetal membrane, wherein the slope surface 3 is matched with a pouring system, so that the slope surface is in an inclined state during pouring, and a sprue is in an inclined state;
the pouring temperature is 1390 ℃ to prevent the feeding channel from being solidified prematurely, so that the supply amount at the thick wall is insufficient. The inclination angle of the slope surface is 10 degrees. And (3) modeling the casting before pouring, and placing sand-isolating chilling blocks at the hot spot part of the bottom surface of the casting according to simulation result analysis during modeling so that the shrinkage and solidification of the casting are more uniform. The inclined angle end of the slope surface is close to the sprue, and the bottom of the slope surface is close to the inner sprue.
By adopting the control of material components, the carbon equivalent of the molten iron is improved and is in a hypereutectic component, and the component proportion of an alloying element is properly controlled, so that the shrinkage tendency of the molten iron is reduced; the sprue 1 of the pouring system is set to be the highest point in a pouring state, so that the function of pouring and feeding can be realized, and the sprue can be used as a riser for feeding; an inner pouring gate 2 of the pouring system is arranged to avoid the joint part of the large plane with the irregular bottom surface and the rib plate; the slope 3 with the inclination angle of 10 degrees is arranged to be matched with a pouring system, so that the pouring system is in an inclined state during pouring, and the pouring system has obvious characteristics of pouring and shrinkage compensation; the reasonable chill arrangement ensures that the casting is solidified more uniformly, and the shrinkage cavities and the shrinkage porosity of the cross-shaped or T-shaped structure are reduced; the pouring temperature is 1390 ℃, thereby preventing the feeding channel from being solidified prematurely and ensuring that the supply amount at the thick wall is insufficient.
Claims (5)
1. A casting process of a full mold casting type tire film casting is characterized in that: the method comprises the following casting materials:
3.6 to 3.8 percent of C, 2.3 to 2.5 percent of Si, 0.55 to 0.65 percent of Mn, 0.1 to 0.12 percent of Cr0.1, 0.45 to 0.55 percent of Mo, 0.85 to 0.9 percent of Cu, 0.9 to 1.0 percent of Ni, 0.04 to 0.06 percent of Mg, 0.02 to 0.04 percent of Re, less than or equal to 0.05 percent of P, less than or equal to 0.012 percent of S, and the balance of Fe and inevitable impurity elements;
the sprue gate of the pouring system is arranged to avoid the large irregular plane on the bottom surface and the joint part of the rib plate, the sprue gate is arranged to be the highest point in the pouring state, the sprue gate has the function of pouring and feeding, and the sprue gate can be used as a riser for feeding;
manufacturing a slope surface with an inclination angle according to the structure of the fetal membrane, wherein the slope surface is matched with a pouring system so that the slope surface is in an inclined state during pouring, and a sprue is in an inclined state;
firstly, making a model, then filling sand into the model for modeling, carrying out CAE simulation analysis on a casting model during modeling, and analyzing and reasonably placing chillers according to a simulation result;
and after the model is placed and molded, mixing the pouring materials, pouring through a pouring system, and cooling to obtain a full-mold casting fetal membrane casting.
2. The casting process of full mold casting type tire mold castings according to claim 1, characterized in that: the pouring temperature is 1390 +/-5 ℃ to prevent the feeding channel from being solidified prematurely, so that the supply amount of the thick wall is insufficient.
3. The casting process of full mold casting type tire mold castings according to claim 1, characterized in that: the inclination angle of the slope surface is 10 degrees.
4. The casting process of full mold casting type tire mold castings according to claim 1, characterized in that: and (3) modeling the casting before pouring, and placing sand-isolating chilling blocks at the hot spot part of the bottom surface of the casting according to simulation result analysis during modeling so that the shrinkage and solidification of the casting are more uniform.
5. The casting process of full mold casting type tire mold castings according to claim 1, characterized in that: the inclined angle end of the slope surface is close to the sprue, and the bottom of the slope surface is close to the inner sprue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010229356.8A CN111230045A (en) | 2020-03-27 | 2020-03-27 | Casting process of full mold casting type tire mold casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010229356.8A CN111230045A (en) | 2020-03-27 | 2020-03-27 | Casting process of full mold casting type tire mold casting |
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| Publication Number | Publication Date |
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| CN111230045A true CN111230045A (en) | 2020-06-05 |
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| CN202010229356.8A Pending CN111230045A (en) | 2020-03-27 | 2020-03-27 | Casting process of full mold casting type tire mold casting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113426979A (en) * | 2021-05-25 | 2021-09-24 | 芜湖泓鹄材料技术有限公司 | Manufacturing and using method of automobile stamping and drawing die solid casting section surface chilling block |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113426979A (en) * | 2021-05-25 | 2021-09-24 | 芜湖泓鹄材料技术有限公司 | Manufacturing and using method of automobile stamping and drawing die solid casting section surface chilling block |
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Application publication date: 20200605 |