CN104190884A - Producing method of clean brazing filler metal cast ingots - Google Patents
Producing method of clean brazing filler metal cast ingots Download PDFInfo
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- CN104190884A CN104190884A CN201410402280.9A CN201410402280A CN104190884A CN 104190884 A CN104190884 A CN 104190884A CN 201410402280 A CN201410402280 A CN 201410402280A CN 104190884 A CN104190884 A CN 104190884A
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- filler metal
- brazing filler
- metal alloy
- tundish
- brazing
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Abstract
The invention discloses a producing method of clean brazing filler metal cast ingots. Firstly, brazing filler metal alloy is smelted through a conventional method; a tundish is preheated to a temperature lower than a failure temperature of brazing flux, and then molten brazing filler metal alloy is poured into the tundish, wherein a ceramic filter, an activated carbon layer and reaction brazing flux are sequentially arranged in the tundish from top to bottom, and the outer wall of the tundish is wrapped by a heat preservation layer; the molten brazing filler metal alloy firstly passes through the ceramic filter and then passes through the activated carbon layer and the brazing flux for full reaction, so that gas and impurities in the brazing filler metal alloy are removed; the molten brazing filler metal alloy is poured out after the ceramic filter is replaced, after secondary filtration, casting and cooling, 1/3 of the upper portion of a cast ingot is removed, and the remaining 2/3 cast ingot is the obtained clean brazing filler metal cast ingot. The producing method has the advantages that gas removing and impurity removing are carried out at the same time, occupied space of equipment is quite small, operation is simple, gas removing efficiency is high, investment is low and operation cost is low; 1/3 of the upper portion of the cast ingot after pouring is removed, the defects of gas holes and impurities of the cast ingot are further reduced, and later processing of brazing filler metal is facilitated.
Description
Technical field
The present invention relates to solder ingot casting, especially relate to a kind of production method of clean solder ingot casting.
Background technology
Soldering is a kind of important material method of attachment, along with soldering tech is increasingly extensive in the application in the fields such as Aero-Space, the energy and new forms of energy, vehicle, information electronic, nuclear engineering, equipment manufacture, exploration and digging in recent years, industry is also more and more higher to the performance requirement of solder; The particularly cleanliness factor problem of brazing material, has caused soldering researcher's concern.Soldered fitting performance and solder performance relation are very large, and non-clean solder can have a huge impact brazing quality, and as solder poor fluidity, ratio of brazing area is low, pore and be mingled with manyly etc. in brazed seam, and therefore the research of clean solder is significant.
Research and application brazing filler metal alloy cleaning molten treatment technology are the important means of improving solder cleanliness factor.If gas in silver solder is with O
2be the main H that also contains
2, N
2deng, field trash is taking oxide inclusions as main.Silver solder GB is by O
2content is controlled at 150 ~ 300ppm.The prior art of clean solder ingot casting is: when brazing filler metal alloy melting, in stove, carry out degasification, removal of impurities, on melt, adopt slag former (active carbon or flux) soverlay technique, there is chemistry, physics, mechanism in the gas in slag former and melt and solid oxide field trash, thereby reaches the object of degasification, removal of impurities.But the shortcoming of this kind of method is because the density of active carbon or flux is less than fusant density conventionally, active carbon or flux swim in melt top, the poor effect of degasification, removal of impurities, makes cast ingot quality out inhomogeneous, and top is many pores and oxide inclusions often.So the solder ingot casting of producing at present, oxide inclusion content is high, and ingot quality is poor, can not reach the instructions for use of clean solder.
Summary of the invention
The object of the present invention is to provide the production method of a kind of gas, clean solder ingot casting that inclusion content is low.
For achieving the above object, the present invention can take following technical proposals:
The production method of clean solder ingot casting of the present invention comprises the steps:
The first step, according to a conventional method melting brazing filler metal alloy;
Second step, is first preheated to tundish the temperature losing efficacy lower than brazing flux, then the brazing filler metal alloy of fusing is poured into inner being disposed with in the tundish of ceramic filter, active carbon layer and reaction flux from top to bottom, and the outer wall of this tundish is coated with heat-insulation layer; First the brazing filler metal alloy liquation of pouring in tundish passes through ceramic filter, filters out oxide inclusions wherein, and then flows in brazing flux through active carbon layer, by fully reacting with active carbon and brazing flux, removes gas and field trash in brazing filler metal alloy;
The 3rd step, changes the ceramic filter in tundish, then the brazing filler metal alloy liquation in tundish is poured out, and after again brazing filler metal alloy solution being filtered, brazing filler metal alloy liquation is watered to casting mold;
The 4th step, cooling after, by ingot casting top 1/3 part remove, remaining 2/3 ingot casting is the clean solder ingot casting obtaining.
Described ceramic filter screen cloth mesh is of a size of 0.84 ~ 1mm.
The invention has the advantages that brazing filler metal alloy liquation (melt) after melting first pours tundish into and filter before cast, remove oxide inclusions through ceramic filter, remove and be mingled with active carbon and brazing flux combined deoxidation, better effects if.In addition, the present invention carries out by degasification, except being mingled with simultaneously, and equipment takes up an area minimum, simple to operate, and degassing efficiency is high, small investment, and operating cost is low.Excision ingot casting top 1/3 part after cast, the defect such as further reduce ingot casting pore, be mingled with, the cleaning of residue ingot casting, quality is high, is beneficial to the pressure processing in solder later stage.
Brief description of the drawings
Fig. 1 is the structural representation of tundish in the inventive method.
Detailed description of the invention
The production method of clean solder ingot casting of the present invention, comprises the steps:
The first step, according to a conventional method melting brazing filler metal alloy;
Second step, first tundish is preheated to the temperature losing efficacy lower than brazing flux, then the brazing filler metal alloy of fusing is poured into inner being disposed with in the tundish (as shown in Figure 1) of ceramic filter, active carbon layer and reaction flux from top to bottom, the outer wall of this tundish is coated with heat-insulation layer 1; Pour the first movable ceramic filter 2 that is placed on tundish top of process of brazing filler metal alloy liquation in tundish into, mesh size is that the ceramic filter 2 of 0.84 ~ 1mm filters out oxide inclusions wherein, and then flow in brazing flux 4 through active carbon layer 3, in flow process, brazing filler metal alloy liquation, by fully reacting with active carbon and brazing flux, can be removed gas and field trash in brazing filler metal alloy;
The 3rd step, changes the ceramic filter 2 in tundish, then the brazing filler metal alloy liquation in tundish is poured out, and the ceramic filter 2 of newly changing waters brazing filler metal alloy liquation to casting mold and forms ingot casting after again brazing filler metal alloy solution being filtered;
The 4th step, after ingot casting is naturally cooling, removes ingot casting top 1/3 part, and remaining 2/3 ingot casting is the clean solder ingot casting meeting the demands obtaining.
In this process, the ceramic filter 2 on tundish upper strata can will be greater than the inclusion removal of 10 μ m in melt (brazing filler metal alloy liquation), active carbon layer 3 in the middle of being positioned at can fully contact with melt, can fully react and produce a large amount of bubbles and effusion melt with oxygen in melt etc., improve in conventional method active carbon and swum in melt top and remove the bad shortcoming of gas; And the brazing flux that is arranged in tundish bottom can be good at removing the oxide inclusions of melt, the bubble that brazing flux and fusant reaction generate can be taken away again the gas in melt, except being mingled with, degasification carries out simultaneously, a kind of melt correspondence adds a kind of brazing flux just can reach the good object of removing oxide inclusions; Melt cast after tundish filters is while becoming ingot casting, the ingot casting lower air holes of first solidifying, is mingled with less, top pore, is mingled with manyly, and after 1/3 part of excision ingot casting top, the ingot casting obtaining will be cleaner.Ingot casting pore that the inventive method is produced, the defect such as to loosen, be mingled with considerably less, seldom occurs defect in the follow-up shaping such as extruding, the rolling processing technology of solder, good quality of product, and yield rate is high.
Below by embodiment, the present invention is described in further detail.
Embodiment 1
The BAg45CuZn silver-base solder of preparation 20Kg: first raw material is carried out to melting, solder fusion temperature is 810 DEG C.The brazing filler metal alloy liquation of fusing is poured in the tundish shown in Fig. 1 (600 DEG C of preheat temperatures), built-in ceramic filter 2 screen mesh size are 1mm, the brazing flux 4 of bottom adopts QJ102, and melt, in the time pouring into, pour out tundish, can filter through twice ceramic filter 2, and combine except being mingled with after degasification through active carbon layer 3 and brazing flux 4, just pour into casting mold, treat ingot solidification, take out ingot casting, excision top 1/3, obtains clean ingot casting.The oxide inclusions particle that in clean ingot casting, size is greater than 10 μ m is removed, and outgassing rate is 60 ~ 65%, meets instructions for use completely.
Embodiment 2
The BCu58ZnMn copper base solder of preparation 20Kg: first raw material is carried out to melting, solder fusion temperature is 909 DEG C.The brazing filler metal alloy of fusing is poured in the tundish shown in Fig. 1 (600 DEG C of preheat temperatures), built-in ceramic filter 2 screen mesh size are 1mm, bottom brazing flux adopts YJ1, melt filters through twice ceramic filter 2, and active carbon layer 3 and brazing flux 4 are combined except being mingled with after degasification, pour into casting mold, treat ingot solidification, take out ingot casting, excision top 1/3, obtains clean ingot casting.The particle that in clean ingot casting, oxide inclusions size is greater than 10 μ m is removed, and outgassing rate is 56 ~ 70%, and ingot casting meets instructions for use.
Embodiment 3
The HL402 aluminium base solder of preparation 20Kg: first raw material is carried out to melting, solder fusion temperature is 585 DEG C.The brazing filler metal alloy of fusing is poured in the tundish shown in Fig. 1 (400 DEG C of preheat temperatures), the screen mesh size of built-in ceramic filter 2 is 0.84mm, bottom brazing flux adopts QJ201, melt filters through twice ceramic filter 2, and active carbon layer 3 and brazing flux 4 are combined except being mingled with after degasification, pour into casting mold, treat ingot solidification, take out ingot casting, excision top 1/3, obtains clean ingot casting.The particle that in clean ingot casting, oxide inclusions size is greater than 5 μ m is removed, and outgassing rate is 60 ~ 70%, and ingot casting meets instructions for use.
Claims (2)
1. a production method for clean solder ingot casting, is characterized in that: it comprises the steps:
The first step, according to a conventional method melting brazing filler metal alloy;
Second step, is first preheated to tundish the temperature losing efficacy lower than brazing flux, then the brazing filler metal alloy of fusing is poured into inner being disposed with in the tundish of ceramic filter, active carbon layer and reaction flux from top to bottom, and the outer wall of this tundish is coated with heat-insulation layer; First the brazing filler metal alloy liquation of pouring in tundish passes through ceramic filter, filters out oxide inclusions wherein, and then flows in brazing flux through active carbon layer, by fully reacting with active carbon and brazing flux, removes gas and field trash in brazing filler metal alloy;
The 3rd step, changes the ceramic filter in tundish, then the brazing filler metal alloy liquation in tundish is poured out, and after again brazing filler metal alloy solution being filtered, brazing filler metal alloy liquation is watered to casting mold;
The 4th step, cooling after, by ingot casting top 1/3 part remove, remaining 2/3 ingot casting is the clean solder ingot casting obtaining.
2. the production method of clean solder ingot casting according to claim 1, is characterized in that: described ceramic filter screen cloth mesh is of a size of 0.84 ~ 1mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410402280.9A CN104190884B (en) | 2014-08-15 | 2014-08-15 | A kind of production method of clean solder ingot casting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410402280.9A CN104190884B (en) | 2014-08-15 | 2014-08-15 | A kind of production method of clean solder ingot casting |
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|---|---|
| CN104190884A true CN104190884A (en) | 2014-12-10 |
| CN104190884B CN104190884B (en) | 2016-06-22 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3907962A (en) * | 1969-07-16 | 1975-09-23 | Koichi Ogiso | Method of preparing a filter medium for the filtration of molten aluminum or a molten aluminum alloy |
| US4334990A (en) * | 1979-08-24 | 1982-06-15 | Servimetal | Cartridge for active filtration and treatment of liquid metals and alloys |
| EP0249897A1 (en) * | 1986-06-11 | 1987-12-23 | O.E.T.-METALCONSULT S.r.l. | Process for the degassing, refining or filtering treatment of liquid metals or alloys and related apparatus |
| CN101440432A (en) * | 2007-11-21 | 2009-05-27 | 中国科学院金属研究所 | Filter for purifying smelting molten steel |
| JP2009233700A (en) * | 2008-03-26 | 2009-10-15 | Furukawa Electric Co Ltd:The | Apparatus and method for removing inclusions |
-
2014
- 2014-08-15 CN CN201410402280.9A patent/CN104190884B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3907962A (en) * | 1969-07-16 | 1975-09-23 | Koichi Ogiso | Method of preparing a filter medium for the filtration of molten aluminum or a molten aluminum alloy |
| US4334990A (en) * | 1979-08-24 | 1982-06-15 | Servimetal | Cartridge for active filtration and treatment of liquid metals and alloys |
| EP0249897A1 (en) * | 1986-06-11 | 1987-12-23 | O.E.T.-METALCONSULT S.r.l. | Process for the degassing, refining or filtering treatment of liquid metals or alloys and related apparatus |
| CN101440432A (en) * | 2007-11-21 | 2009-05-27 | 中国科学院金属研究所 | Filter for purifying smelting molten steel |
| JP2009233700A (en) * | 2008-03-26 | 2009-10-15 | Furukawa Electric Co Ltd:The | Apparatus and method for removing inclusions |
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|---|---|
| CN104190884B (en) | 2016-06-22 |
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Address after: 450001 science avenue of Zhengzhou high tech Industrial Development Zone, Zhengzhou, Henan Province, No. Patentee after: Zhengzhou Machinery Research Institute Co., Ltd. Address before: 450000 Songshan South Road, Zhengzhou, Zhengzhou, Henan Patentee before: Zhengzhou Research Institute of Mechanical Engineering |