CN102974764B - 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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- CN102974764B CN102974764B CN201210489608.6A CN201210489608A CN102974764B CN 102974764 B CN102974764 B CN 102974764B CN 201210489608 A CN201210489608 A CN 201210489608A CN 102974764 B CN102974764 B CN 102974764B
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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, a kind of Feeding particularly in the production process of steel-casting.
Background technology
In the production of steel-casting, the defect such as shrinkage porosite, shrinkage cavity, slag inclusion of foundry goods is a great problem of restriction Steel Castings, and he directly has influence on inherent quality and the product yield of steel-casting, and product yield is the important technology index affecting casting cost.Feeding is the key factor directly affecting casting process yield.
Because steel-casting exists liquid contraction and Solid State Contraction in process of setting, in order to ensure that steel-casting obtains fine and close tissue, in the production process of steel-casting, guarantee Feeding channel is unimpeded, guaranteeing that molten steel enough in casting solidification process supplements is the necessary measure of Technology of Steel Castings, adopts riser feeding to be the most most important a kind of form of fundamental sum.It needs for casting solidification process provides enough molten steel, ensures that foundry goods solidifies rear acquisition compact tissue completely, thus obtains foundry goods of good performance.
Traditional steel-casting riser feeding technology adopts common sand mold rising head, and it directly uses mould molding, do not have other insulation material.The process of setting of rising head self also ecto-entad in replenish shrink process, so the ratio that effective feeding molten steel of reality accounts for rising head total measurement (volume) is very little, is about 6-14%.In order to obtain fine and close cast structure, traditional Technology of Steel Castings must adopt larger rising head to meet the feeding of foundry goods, at some heat energy-saving positions, sometimes cannot arrange rising head, can there is shrinkage cavity or shrinkage defect, affect the internal quality of casting.
Adopt traditional rising head, the product yield of steel-casting is general lower.For Lanzhou factory 1030810 rings seat, 1030805 hook bodies, L91291005 bent axle, do not calculate calculation running gate system, the average yield rate of three kinds of products is only 48.6%, and common foundry goods yield rate is also only 50%-70%.Therefore a kind of type of heat insulated feeder is researched and developed imperative.
Summary of the invention
The object 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 foundry engieering.It, except the effect such as deslagging, exhaust, feeding with traditional rising head, mainly extends the setting time of molten steel in rising head, increases molten steel feeding amount, improves yield rate.
Heat preservation rising head is made up of materials such as exothermic mixture, heat preserving agent and adhesives.Foundry goods due to material generation chemical reactions such as exothermic mixtures, makes the molten metal persistent fever in rising head in process of setting, and molten metal temperature is improved, thus extends setting time, improves feeding effect, therefore claims 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, drift pearl 26 ± 2, phenolic resins 5 ± 0.5, iron scale 4 ± 0.5, phosphatase 11 .5. ± 0.1.
Each components by weight of preferential recommendation is:
Aluminium 59.5, drift pearl 26, phenolic resins 5, iron scale 4, phosphatase 11 .5.
Material due to this riser buss has effect of heating, insulation, so in rising head the setting time of molten steel much larger than the casting solidification time, the ratio of effective molten steel just increases greatly, be about 75%, the volume size of such rising head just can reduce, save molten steel, then thermal insulation matched exothermic shield and easy cutting blade, casting process yield can bring up to more than 75%.
Detailed description of the invention
Formula 1: steel-casting heat preservation rising head, adopts the raw material of following weight (kilogram) to make: aluminium 64.5, drift pearl 24, phenolic resins 5.5, iron scale 4.5, phosphatase 11 .6.
Formula 2: steel-casting heat preservation rising head, adopts the raw material of following weight (kilogram) to make: aluminium 54.5, drift pearl 28, phenolic resins 4.5, iron scale 3.5, phosphatase 11 .4.
Formula 3: steel-casting heat preservation rising head, adopts the raw material of following weight (kilogram) to make: aluminium 59.5, drift pearl 26, phenolic resins 5, iron scale 4, phosphatase 11 .5.
1, heating principle: heat preservation riser buss makes of insulation material, exothermic material.When liquid steel temperature in rising head surpasses 1500 ° of C, materials of aluminum in rising head is all oxidized by fierceness and discharges a large amount of heats, the product temperature of its chemical reaction can reach 3000 ° of more than C, ensure that the molten metal in rising head is heated continuously, extend the setting time of molten metal in rising head, thus reach the effect of lasting feeding.
2, the technological process of heat preservation riser buss: raw material → premix → stirring → shaping → oven dry → inspection → packaging warehouse-in.
Rising head chemical composition assay of the present invention shows, in rising head, the chemical composition of each point is compared with the primitive component of molten steel, 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.
By application type of heat insulating riser sleeve compared with traditional sand mold rising head, mainly contain following advantage.
Lanzhou factory 1030810 rings seat, 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㎜ |
| Scorification phenomenon | Seriously | Nothing |
| Shrink | Secondary shrinks in V-shape | Secondary shrinks in U-shaped |
1, significantly improving the feeding effect of steel-casting, is 3 times of common rising head, improves the product yield of foundry goods.
2, molten steel is saved in a large number.
3, owing to supporting the use easy cutting blade, rising head is easy to cleaning, saves oxy-acetylene gas, air-arc cutting and cost of labor.
Claims (1)
1. the heat preservation feeding head in casting steel casting, is characterized in that adopting the raw material of following weight ratio to make: aluminium 59.5, drift 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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
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| CN102974764A CN102974764A (en) | 2013-03-20 |
| CN102974764B true CN102974764B (en) | 2015-06-17 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (5)
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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 |
| CN85107187A (en) * | 1985-09-29 | 1987-07-22 | 北京钢铁学院 | Heating feeder head for cast iron |
| CN101433944A (en) * | 2008-12-19 | 2009-05-20 | 洛阳双瑞特种装备有限公司 | High-efficient exothermic riser sleeve for casting |
| CN101758165A (en) * | 2009-08-31 | 2010-06-30 | 滨海县万恒铸业有限公司 | Novel process flow of steel castings |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3374242B2 (en) * | 1998-10-09 | 2003-02-04 | 正光 三木 | Exothermic assembly for castings |
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2012
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN85107187A (en) * | 1985-09-29 | 1987-07-22 | 北京钢铁学院 | Heating feeder head for cast iron |
| CN101433944A (en) * | 2008-12-19 | 2009-05-20 | 洛阳双瑞特种装备有限公司 | High-efficient exothermic riser sleeve for casting |
| CN101758165A (en) * | 2009-08-31 | 2010-06-30 | 滨海县万恒铸业有限公司 | Novel process flow of steel castings |
Non-Patent Citations (4)
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| 宋中勋.铸造用发热保温冒口套的开发研究.《中国优秀硕士学位论文全文数据库,工程科技Ⅰ辑 》.2009,(第5期), * |
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| CN102974764A (en) | 2013-03-20 |
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