CN103627948A - Novel long-acting spheroidizing agent for nodular cast iron processing and preparation and application methods - Google Patents
Novel long-acting spheroidizing agent for nodular cast iron processing and preparation and application methods Download PDFInfo
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- CN103627948A CN103627948A CN201210312485.9A CN201210312485A CN103627948A CN 103627948 A CN103627948 A CN 103627948A CN 201210312485 A CN201210312485 A CN 201210312485A CN 103627948 A CN103627948 A CN 103627948A
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- spheroidizing agent
- nodulizing agent
- iron
- cast iron
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Abstract
The invention relates to a novel long-acting spheroidizing agent for nodular cast iron processing. The spheroidizing agent comprises the following ingredients, by weight, 35% of rare earth alloy, 36% of ferrosilicon, 9% of magnesium ingots, 4% of silico-calcium, 5% of silico-barium, 7% of waste iron and 4% of calcium carbide. In the preparation method, rare earth alloy, ferrosilicon, magnesium ingots, silico-calcium, silico-barium, waste iron and calcium carbide are fused and then cast to ingots, the ingots are crushed and the spheroidizing agent is prepared. The spheroidizing agent and molten iron are mixed according to a certain proportion, and reacted fully. The calcium carbide therein prolongs the initiation time, thus the mixing effect of the spheroidizing agent and then molten iron is good, finally, the optical time of molten iron cast can be prolonged to 20-23min, molten iron can be saved greatly, the rate of finished products is raised, and the waste caused by low quality of products is lowered.
Description
Technical field
The invention belongs to spheroidal graphite cast iron processing technique field, nodulizing agent and preparation using method thereof for especially a kind of New-type long-acting spheroidal graphite cast iron processing.
Background technology
Spheroidal graphite cast iron is in molten iron, to add nodulizing agent, through nodulizing agent, process, making graphite in cast iron be spherical separates out, the final mechanical property that improves cast iron, particularly improved plasticity and toughness, thereby obtained than carbon steel high intensity also, based on its excellent performance, spheroidal graphite cast iron has been widely used for casting some stressed complexity, the part that intensity, toughness, wear resistance are had relatively high expectations.Such as pressure pipeline and accessory, automobile, agricultural, road equipment, valve etc.
Add man-hour, first in the pit of hot metal ladle bottom, add nodulizing agent, repave one deck perlite, then molten iron is watered on the boss of hot metal ladle bottom, utilize the high temperature of molten iron to make nodulizing agent dissolve and mix with molten iron, through reaction, then molten iron is poured in mould, after subsequent disposal, complete the processing of nodular iron casting.
At present, use after nodulizing agent, can only reach 13～15 minutes the longest duration of pouring of an iron clad water, once surpass this time, nodulizing agent performance in molten iron in hot metal ladle will fail, the mechanical property of nodular iron casting is declined, and the defect ware rate in production improves, and causes the increase of production cost, if overlong time, also can cause the waste of the molten iron in hot metal ladle, the thawing of need to again heating, has increased production cost equally.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of New-type long-acting spheroidal graphite cast iron processing nodulizing agent that provide and increase considerably the duration of pouring, guarantees nodular iron casting quality.
The technical scheme that the present invention takes is:
A New-type long-acting spheroidal graphite cast iron processing nodulizing agent, is characterized in that: comprise the following component of mixing by weight percentage:
Another object of the present invention is to provide the preparation method of nodulizing agent for a kind of New-type long-acting spheroidal graphite cast iron processing, it is characterized in that: comprise the following steps:
(1) by metering, each component is mixed, and add in electric furnace;
(2) in electric furnace, be warming up to 1300～1400 degrees Celsius, until each component melts completely;
(3) step product is (2) cast to ingot;
(4) the particle that step product is (3) crushed to 3～40 millimeters makes finished product.
Another object of the present invention is to provide the using method of nodulizing agent for a kind of New-type long-acting spheroidal graphite cast iron processing, it is characterized in that: nodulizing agent is placed in the pit of hot metal ladle bottom in advance, its upper berth one deck perlite, the weight ratio of nodulizing agent and molten iron is 2:125.
Advantage of the present invention and positively effect are:
In the present invention, to after rare earth alloy, magnesium ingot, ferrosilicon, silico-calcium, silicon barium, scrap iron and carbide of calcium melting, cast ingot, after pulverizing, make nodulizing agent, this nodulizing agent mixes with molten iron by a certain percentage, by abundant reaction again, carbide of calcium wherein extends the burst time, the better effects if that nodulizing agent is mixed with special water, the Best Times while finally making molten iron cast can extend to 20～23 minutes, has greatly saved molten iron, improve yield rate, reduced the waste causing because product quality is low.
Embodiment
Below in conjunction with embodiment, the present invention is further described, and following embodiment is illustrative, is not determinate, can not limit protection scope of the present invention with following embodiment.
A New-type long-acting spheroidal graphite cast iron processing nodulizing agent, innovation of the present invention is: comprise the following component of mixing by weight percentage:
Above-mentioned New-type long-acting spheroidal graphite cast iron processing comprises the following steps by the preparation method of nodulizing agent:
(1) by metering, each component is mixed, and add in electric furnace;
(2) in electric furnace, be warming up to 1300～1400 degrees Celsius, until each component melts completely;
(3) step product is (2) cast to ingot;
(4) the particle that step product is (3) crushed to 3～40 millimeters makes finished product.
Embodiment
By following weight, take each component:
Above-mentioned each component adds in middle frequency furnace, is warming up to 1300～1400 degrees Celsius, and each component is melted, and casting ingot-forming, pulverizes after processing, and granular size is at 3～40 millimeters.
Select 2 tons of hot metal ladle, in the pit of hot metal ladle bottom, add 32 kilograms of nodulizing agents after above-mentioned pulverizing, at nodulizing agent upper berth one deck perlite, molten iron to be poured on the boss of hot metal ladle bottom, nodulizing agent melts under the high temperature of molten iron, and detonate, fully after reaction, pour into a mould, choose respectively the foundry goods of 10 minutes, 15 minutes, 20 minutes and test, result shows, the mechanical property of the foundry goods of each time is consistent, and the homogeneity of batch products is good.
In the present invention, to after rare earth alloy, magnesium ingot, ferrosilicon, silico-calcium, silicon barium, scrap iron and carbide of calcium melting, cast ingot, after pulverizing, make nodulizing agent, this nodulizing agent mixes with molten iron by a certain percentage, by abundant reaction again, carbide of calcium wherein extends the burst time, the better effects if that nodulizing agent is mixed with special water, the Best Times while finally making molten iron cast can extend to 20～23 minutes, has greatly saved molten iron, improve yield rate, reduced the waste causing because product quality is low.
Claims (3)
1. a New-type long-acting spheroidal graphite cast iron processing nodulizing agent, is characterized in that: comprise the following component of mixing by weight percentage:
2. a kind of New-type long-acting spheroidal graphite cast iron according to claim 1 is processed the preparation method with nodulizing agent, it is characterized in that: comprise the following steps:
(1) by metering, each component is mixed, and add in electric furnace;
(2) in electric furnace, be warming up to 1300～1400 degrees Celsius, until each component melts completely;
(3) step product is (2) cast to ingot;
(4) the particle that step product is (3) crushed to 3～40 millimeters makes finished product.
3. the using method of nodulizing agent for a kind of New-type long-acting spheroidal graphite cast iron processing according to claim 1, is characterized in that: nodulizing agent is placed in the pit of hot metal ladle bottom in advance, its upper berth one deck perlite, and the weight ratio of nodulizing agent and molten iron is 2:125.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210312485.9A CN103627948A (en) | 2012-08-30 | 2012-08-30 | Novel long-acting spheroidizing agent for nodular cast iron processing and preparation and application methods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210312485.9A CN103627948A (en) | 2012-08-30 | 2012-08-30 | Novel long-acting spheroidizing agent for nodular cast iron processing and preparation and application methods |
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| Publication Number | Publication Date |
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| CN103627948A true CN103627948A (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210312485.9A Pending CN103627948A (en) | 2012-08-30 | 2012-08-30 | Novel long-acting spheroidizing agent for nodular cast iron processing and preparation and application methods |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109957633A (en) * | 2019-03-21 | 2019-07-02 | 南京镝峰复合材料有限公司 | Nodulizer with protective film |
-
2012
- 2012-08-30 CN CN201210312485.9A patent/CN103627948A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109957633A (en) * | 2019-03-21 | 2019-07-02 | 南京镝峰复合材料有限公司 | Nodulizer with protective film |
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Application publication date: 20140312 |