CN1057243C - Metal liquid pulse inoculation treating method - Google Patents

Metal liquid pulse inoculation treating method Download PDF

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Publication number
CN1057243C
CN1057243C CN98100543A CN98100543A CN1057243C CN 1057243 C CN1057243 C CN 1057243C CN 98100543 A CN98100543 A CN 98100543A CN 98100543 A CN98100543 A CN 98100543A CN 1057243 C CN1057243 C CN 1057243C
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CN
China
Prior art keywords
metal liquid
inoculation
metal
treating
pulse
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Expired - Fee Related
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CN98100543A
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Chinese (zh)
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CN1195590A (en
Inventor
王建中
苍大强
张家泉
周大奇
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Beijing University of Technology
University of Science and Technology Beijing USTB
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University of Science and Technology Beijing USTB
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Priority to CN98100543A priority Critical patent/CN1057243C/en
Publication of CN1195590A publication Critical patent/CN1195590A/en
Application granted granted Critical
Publication of CN1057243C publication Critical patent/CN1057243C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The present invention relates to a metal liquid pulse inoculation treating method which is a novel technology which is completely different from other methods for improving a consolidated structure. The present invention belongs to the technical field of metallurgy. The metal liquid pulse inoculation treating method has the characteristics that the application range is wide, metal liquid can not be polluted, an inoculated crystal nucleus is stable, the inoculated crystal nucleus is not easily deteriorated, the mechanical property of a casting blank (cast product) can be enhanced, the use is convenient, etc. Steel and aluminium-copper alloy are processed in an impulse inoculation mode, and the purpose of the present invention is realized.

Description

Metal liquid pulse inoculation treating method
The invention belongs to metallurgical technology field.
In the pyrometallurgy actual production, metal and alloy melt are in process of setting, because it is cold less than solidifying required cold excessively of forming core to solidify the required mistake of growth, flourishing columnar zone appears in consolidated structure inevitably, the size of columnar zone corresponding the quality of strand or casting quality, gross segregation, macroscopic view are loose, the appearance of crackle etc. all is formed with direct relation with column crystal.Improve this defective on the consolidated structure, common processing method has the method that breeds that adds nucleating agent, supersonic oscillations method, electromagnetic stirring method etc.These methods respectively have its characteristics, and its deficiency is also arranged.Purpose of the present invention is exactly that a kind of, embryos of being widely used, being pregnant with pollution-free, easy to use to handled molten metal stable treated method is more asked in record.The impulse generator that the inventor designs, makes with oneself is implemented the pulse inoculation to molten metal before cast can realize purpose of the present invention.
Metal liquid pulse inoculation treating method is a new technology that is different from additive method fully.According to cluster academic theory in the Condensed Matter Physics and gel electric double layer model theory, we propose the basic concept that mechanism is bred in relevant pulse, that is:
The embryos that has certain stable existence in liquid metal or alloy, the embryos of this stable existence are discontinuous on yardstick, at a certain temperature, the embryos that temperature therewith is corresponding, have a certain yardstick of probability maximum are arranged; Temperature raises, and embryos changes to the dominant direction of small scale probability; Temperature reduces brilliant base and develops to the dominant direction of large scale.And brilliant base that can stable existence can describe with jellium model, forms cation in the atom of brilliant base and can be used as the positive charge of a homogeneous background and balance each other with valence electron.According to the electric double layer theory of jellium model, two brilliant bases of small scale will form the brilliant base of a large scale and need overcome a comprehensive barrier potential, and overcoming this comprehensive barrier potential needs environment that energy or the interior fluctuation of energy of system are provided.When the liquid towards metal or alloy applies an impulse electric field, changed on the one hand and be the electron distributions of brilliant base dispatch from foreign news agency layer, reduce the repulsion potential energy between two brilliant bases, provide kinetic energy for brilliant base on the other hand, it is the brilliant base of large scale that brilliant base is bred by the brilliant base of small scale, has realized breeding before the forming core of brilliant base.
The metal liquid pulse inoculation treating method characteristics are:
1. metal liquid pulse inoculation treating method is to breed the brilliant base of forming core in the molten metal body, and therefore, this technology not only can be used for breeding of alloy liquid, also can be used for the inoculation of simple metal liquid, thereby has range of application more widely;
Metal liquid pulse inoculation treating method adopt with institute's molten metal liquid phase with the metal of material or to the free of contamination material of the molten metal of institute as electrode, do not have pollution to molten metal;
3. molten metal can obtain large scale crystalline substance base stable, that be easy to forming core after the pulse inoculation, as long as molten metal is in temperature-fall period or cooling back insulating process, the brilliant base that is pregnant with is the energy stable existence just, can solve the inoculation fade problem;
4. molten metal is after the pulse inoculation, and the columnar zone in the consolidated structure of ingot casting (part), strand dwindles.The equiax crystal district enlarges, defectives such as even tissue, refinement, minimizing gross segregation, loose, crackle, and the mechanical property of ingot casting (part), strand improves;
5. the metal liquid pulse inoculation is behind metal molten, the cast or continuous casting before casting ladle, tundish, continuous cast mold or stop in the smelting furnace molten metal being carried out inoculation, easy to use.
The implementing process flow process of metal liquid pulse inoculation treating method is: molten metal liquid injects casting ladle, and (end in the smelting furnace of smelting process also can) carries out the pulse inoculation in casting ladle, and the molten metal after the processing is promptly pourable.
Embodiment sees Fig. 1, Fig. 2.Fig. 1 is that Al-5.0%Cu is untreated (a) and the comparison of the solidified structure of (b) little ingot casting after the pulse inoculation; Fig. 2 is the solidified structure comparison that the Q235 steel alloy was untreated (a) and handled through pulse back (b) foundry goods. by Fig. 1, Fig. 2 more as can be seen, after the extra pulse inoculation, solidified structure is even, tiny, column crystal is inhibited.
Fig. 3 is the impulse generator schematic diagram, impulse generator by power supply 1., the rectifying and voltage-stabilizing system 2., the energy settings system 3., pulse frequency is set and control system 4., 5. pulse output wait and form; This generator can produce 10~3000 volts of voltages that are suitable for the pulse inoculation, the potential pulse of pulse frequency 0.1~1000 time/second.

Claims (5)

1. molten metal inoculation treating method, it is by imposing energy for the brilliant base in the molten metal, breeds before achieving nuclear, it is characterized in that it is behind metal molten, is handled with impulse electric field before cast or continuous casting.
2. processing method as claimed in claim 1, the pulse frequency that it is characterized in that the impulse electric field that it is bestowed is 0.1~1000 time/second, voltage is 10~3000 volts.
3. processing method as claimed in claim 1 or 2 is characterized in that it both had been applicable to that simple metal also was applicable to alloy.
4. processing method as claimed in claim 1 or 2 is characterized in that it can use on smelting furnace, casting ladle, tundish and the continuous cast mold of end smelting.
5. processing method as claimed in claim 3 is characterized in that it can use on smelting furnace, casting ladle, tundish and the continuous cast mold of end smelting.
CN98100543A 1998-02-18 1998-02-18 Metal liquid pulse inoculation treating method Expired - Fee Related CN1057243C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN98100543A CN1057243C (en) 1998-02-18 1998-02-18 Metal liquid pulse inoculation treating method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN98100543A CN1057243C (en) 1998-02-18 1998-02-18 Metal liquid pulse inoculation treating method

Publications (2)

Publication Number Publication Date
CN1195590A CN1195590A (en) 1998-10-14
CN1057243C true CN1057243C (en) 2000-10-11

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CN98100543A Expired - Fee Related CN1057243C (en) 1998-02-18 1998-02-18 Metal liquid pulse inoculation treating method

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102078948B (en) * 2011-01-28 2012-10-03 河北文丰钢铁有限公司 Continuous casting pouring device for electrical pulse inoculation
CN102078922B (en) * 2011-01-28 2012-10-24 武安市文祥合金制造有限公司 Casting gating system
CN103212697B (en) * 2013-04-12 2015-04-01 西北工业大学 Casting mould method for improving casting aluminium alloy solidification structure by adopting variable-frequency low-voltage modulating pulse electric field
CN103643061B (en) * 2013-12-05 2016-02-24 山东宏泰科技有限公司 The preparation technology of Mg-Al-Zn alloy
CN104498787B (en) * 2014-12-24 2016-08-31 辽宁工业大学 A kind of in-situ authigenic Mg2the preparation method of Si particle enhanced aluminum-based composite material
CN104651644A (en) * 2015-01-23 2015-05-27 安徽蛟龙科技有限公司 Method for refining copper core wire grains
CN107999718B (en) * 2017-12-07 2019-05-31 安徽工业大学 A method of improving micro-alloyed steel continuous casting process castability

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85100073A (en) * 1985-04-01 1986-07-16 清华大学 Compound inoculated technology of casting ferrite with nodular cast iron
CN1104261A (en) * 1993-12-20 1995-06-28 天津市塘沽区铸造技术开发研究所 Spheroidization apparatus and spheriodization process thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85100073A (en) * 1985-04-01 1986-07-16 清华大学 Compound inoculated technology of casting ferrite with nodular cast iron
CN1104261A (en) * 1993-12-20 1995-06-28 天津市塘沽区铸造技术开发研究所 Spheroidization apparatus and spheriodization process thereof

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CN1195590A (en) 1998-10-14

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