CN102974764A - Steel casting heating heat-preservation feeding head for casting - Google Patents
Steel casting heating heat-preservation feeding head for casting Download PDFInfo
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- CN102974764A CN102974764A CN2012104896086A CN201210489608A CN102974764A CN 102974764 A CN102974764 A CN 102974764A CN 2012104896086 A CN2012104896086 A CN 2012104896086A CN 201210489608 A CN201210489608 A CN 201210489608A CN 102974764 A CN102974764 A CN 102974764A
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Abstract
The invention belongs to the technical field of metal casting, and particularly relates to a heating heat-preservation feeding head for steel casting. The heating heat-preservation feeding head for the steel casting is manufactured from the following raw materials by weight ratio: 59.5+/-5 of aluminum, 26+/-2 of floating beads, 5+/-0.5 of phenolic resins, 4+/-0.5 of iron scales and 1.5+/-0.1 of phosphoric acids. According to the invention, because the material of a feeding head sleeve has heating and heat-preservation effects, the coagulation time of molten steel inside the feeding head is far longer than the supplemented time of casts, the proportion of effective molten steel is greatly enhanced to about 75%, in such a way, the volume and size of the feeding head can be reduced, and the molten steel is conserved; and in addition, a heat-preservation heating covering agent and an easily cut sheet are matched, and therefore the product yield of a casting process can be enhanced to more than 75%.
Description
Technical field
The invention belongs to casting technology field, particularly a kind of Feeding in the production process of steel-casting.
Background technology
In the production of steel-casting, the defectives such as the shrinkage porosite of foundry goods, shrinkage cavity, slag inclusion are a great problems of restriction Steel Castings, and he directly has influence on inherent quality and the product yield of steel-casting, and product yield is an important technology index that affects casting cost.Feeding is a key factor that directly affects casting process yield.
Because there be liquid the contraction and Solid State Contraction in steel-casting in process of setting, in order to guarantee that steel-casting obtains fine and close tissue, in the production process of steel-casting, the assurance Feeding channel is unimpeded, guarantee that it is the necessary measure of Technology of Steel Castings that molten steel enough in the casting solidification process replenishes, adopting riser feeding is the most important a kind of form of fundamental sum.It need to for casting solidification process provide enough molten steel, guarantee that foundry goods solidifies rear acquisition compact tissue fully, thereby obtain well behaved foundry goods.
Traditional steel-casting riser feeding technology is to adopt common sand mold rising head, and it is directly to use mould molding, does not have other insulation material.Rising head self also process of setting of ecto-entad in the feeding process so the ratio that actual effective feeding molten steel accounts for the rising head total measurement (volume) is very little, is about 6-14%.In order to obtain fine and close foundry goods tissue, traditional Technology of Steel Castings must adopt larger rising head to satisfy the feeding of foundry goods, at some heat energy-saving positions, sometimes rising head can't be set, and can have shrinkage cavity or shrinkage defect, affects the internal quality of casting.
Adopt traditional rising head, the product yield of steel-casting is generally lower.Take Lanzhou factory 1030810 rings seats, 1030805 hook bodies, L91291005 bent axle as example, do not calculate the calculation running gate system, the average yield rate of three kinds of products only is 48.6%, and common foundry goods yield rate also only is 50%-70%.Therefore it is imperative to research and develop a kind of type of heat insulated feeder.
Summary of the invention
The purpose of this invention is to provide the heat preservation feeding head series that a kind of steel-casting uses, to improve the product yield problem in the foundry engieering.It mainly is the setting time that prolongs molten steel in the rising head except the effects such as the deslagging with traditional rising head, exhaust, feeding, increases molten steel feeding amount, improves yield rate.
The heat preservation rising head is to be made by materials such as exothermic mixture, heat preserving agent and adhesives.Foundry goods because the material generation chemical reactions such as exothermic mixture make the molten metal persistent fever in the rising head, improves the molten metal temperature in process of setting, thereby prolongs setting time, improves the feeding effect, so claim the heat preservation rising head.
Steel-casting heat preservation rising head is characterized in that adopting the raw material of following weight ratio to make: aluminium 59.5 ± 5, float pearl 26 ± 2, phenolic resins 5 ± 0.5, iron scale 4 ± 0.5, phosphatase 11 .5. ± 0.1.
Preferential each components by weight of recommending is:
Aluminium 59.5, float pearl 26, phenolic resins 5, iron scale 4, phosphatase 11 .5.
Because the material of this riser buss has the effect of heating, insulation, so the setting time of molten steel is much larger than the casting solidification time in the rising head, effectively the ratio of molten steel just increases greatly, be about 75%, the volume size of rising head just can reduce like this, save molten steel, again thermal insulation matched exothermic shield and easily cutting blade, casting process yield can be brought up to more than 75%.
The specific embodiment
Prescription 1: steel-casting heat preservation rising head, adopt the raw material of following weight (kilogram) to make: aluminium 64.5, to float pearl 24, phenolic resins 5.5, iron scale 4.5, phosphatase 11 .6.
Prescription 2: steel-casting heat preservation rising head, adopt the raw material of following weight (kilogram) to make: aluminium 54.5, to float pearl 28, phenolic resins 4.5, iron scale 3.5, phosphatase 11 .4.
Prescription 3: steel-casting heat preservation rising head, adopt the raw material of following weight (kilogram) to make: aluminium 59.5, to float pearl 26, phenolic resins 5, iron scale 4, phosphatase 11 .5.
1, heating principle: the heat preservation riser buss is to make of insulation material, exothermic material.When liquid steel temperature in the rising head surpasses 1500 ° of C, materials of aluminum in the rising head is all discharged a large amount of heats by fierce oxidation, the product temperature of its chemical reaction can reach 3000 ° more than the C, molten metal in the assurance rising head is by continuous heating, prolong the setting time of molten metal in the rising head, thereby reached the effect that continues feeding.
2, the technological process of heat preservation riser buss: raw material → premix → stirring → moulding → oven dry → check → packing warehouse-in.
Rising head chemical composition assay of the present invention shows that the chemical composition of each point is compared with the primitive component of molten steel in the rising head, and carbon increases by 0.01-0.02%, and harmful element sulphur, phosphorus almost do not increase, and can not affect its quality for carbon steel and most of steel alloy.
Compare with traditional sand mold rising head by using the type of heat insulating riser sleeve, mainly contain following advantage.
Lanzhou factory 1030810 rings seats, 1030805 hook bodies
L9291005 bent axle, two kinds of rising head result on trial contrasts
| Project | Common rising head | HG heat preservation rising head |
| Safe altitude | Improve 20-40 ㎜ | |
| Erosion | Rising head corrodes 15-25 ㎜ | 5㎜ |
| The scorification phenomenon | Seriously | Nothing |
| Shrink | Secondary shrinks and is V-shape | Secondary shrinks and is the U font |
1, having significantly improved the feeding effect of steel-casting, is 3 times of common rising head, improves the product yield of foundry goods.
2, save in a large number molten steel.
3, owing to support the use easy cutting blade, rising head is easy to cleaning, saves oxy-acetylene gas, air-arc cutting and cost of labor.
Claims (2)
1. the heat preservation feeding head in the casting steel casting is characterized in that adopting the raw material of following weight ratio to make: aluminium 59.5 ± 5, float pearl 26 ± 2, phenolic resins 5 ± 0.5, iron scale 4 ± 0.5, phosphatase 11 .5. ± 0.1.
2. the heat preservation feeding head in the described casting steel casting according to claim 1 is characterized in that adopting the raw material of following weight ratio to make: aluminium 59.5, float pearl 26, phenolic resins 5, iron scale 4, phosphatase 11 .5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210489608.6A CN102974764B (en) | 2012-11-26 | 2012-11-26 | Steel casting heating heat-preservation feeding head for casting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210489608.6A CN102974764B (en) | 2012-11-26 | 2012-11-26 | Steel casting heating heat-preservation feeding head for casting |
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| CN102974764A true CN102974764A (en) | 2013-03-20 |
| CN102974764B CN102974764B (en) | 2015-06-17 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103551512A (en) * | 2013-11-15 | 2014-02-05 | 哈尔滨理工大学 | Exothermic insulating riser sleeve and preparation method thereof |
| CN104646632A (en) * | 2015-02-11 | 2015-05-27 | 宝鸡华光铸造材料科技有限公司 | Heating and temperature preservation riser sleeve for casting and wet process preparation technology |
| CN107470565A (en) * | 2017-08-15 | 2017-12-15 | 山东铁大王冶铸材料有限公司 | A kind of type of heat rising head |
| CN108453219A (en) * | 2018-03-29 | 2018-08-28 | 西峡县西泵特种铸造有限公司 | A kind of design method of heat preservation riser |
| CN110252955A (en) * | 2019-06-17 | 2019-09-20 | 中车长江铜陵车辆有限公司 | The novel easy cutting feedhead casting process of truck bolster for railway wagon |
| CN111889629A (en) * | 2020-08-14 | 2020-11-06 | 欧区爱铸造材料（中国）有限公司 | Fluorine-free efficient exothermic agent for heating casting riser |
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| FR1416173A (en) * | 1964-11-27 | 1965-10-29 | Archer Daniels Midland Co | Molding of exothermic compositions for vent sleeves |
| CN85204026U (en) * | 1985-09-29 | 1986-06-11 | 北京钢铁学院 | Temperature holding overflow jacket for casting piece |
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| JP2000176604A (en) * | 1998-10-09 | 2000-06-27 | Masamitsu Miki | Exothermic assembly for casting |
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| 刘君等: "膨胀珍珠岩保温冒口套的研究与应用", 《铸造技术》 * |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103551512A (en) * | 2013-11-15 | 2014-02-05 | 哈尔滨理工大学 | Exothermic insulating riser sleeve and preparation method thereof |
| CN103551512B (en) * | 2013-11-15 | 2015-07-08 | 哈尔滨理工大学 | Exothermic insulating riser sleeve and preparation method thereof |
| CN104646632A (en) * | 2015-02-11 | 2015-05-27 | 宝鸡华光铸造材料科技有限公司 | Heating and temperature preservation riser sleeve for casting and wet process preparation technology |
| CN107470565A (en) * | 2017-08-15 | 2017-12-15 | 山东铁大王冶铸材料有限公司 | A kind of type of heat rising head |
| CN108453219A (en) * | 2018-03-29 | 2018-08-28 | 西峡县西泵特种铸造有限公司 | A kind of design method of heat preservation riser |
| CN110252955A (en) * | 2019-06-17 | 2019-09-20 | 中车长江铜陵车辆有限公司 | The novel easy cutting feedhead casting process of truck bolster for railway wagon |
| CN111889629A (en) * | 2020-08-14 | 2020-11-06 | 欧区爱铸造材料（中国）有限公司 | Fluorine-free efficient exothermic agent for heating casting riser |
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|---|---|
| CN102974764B (en) | 2015-06-17 |
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