JPH01500527A - Fast-dissolving additive for metal melts - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Fast-dissolving additive for wide range melts The present invention provides a fast-dissolving additive for metal melts, a method for its production and an alloying element. Concerning its use for introduction into golden parrots.

When producing alloys, the alloying elements are actually usually solid and added to a liquid metal bath KMS. It will be done. For example, aluminum 9m is alloyed with magnesium to obtain good strength. It is alloyed with silicon to improve buildability and strength, and to improve strength and strength. Alloyed with manganese and chromium to increase corrosion resistance. Besides, alloy properties Intentionally v! Numerous other alloying elements are known for use in alloying. Conducting alloying elements In order to achieve this, alloying metals with higher melting points than the main metal J@ 6 is added in the form of an aged alloy to achieve rapid dissolution. The disadvantage of this pre-alloy is that Limited metal content for alloys. So, the example is for aluminum 9mm alloy. Standard alloys contain, in addition to aluminum, only up to 20% silicon, up to 20% of chromium or up to 50% Mn'. This allows the alloy Up to four times as much aluminum as violet must be added to the element. , storage management, energy consumption, etc. costs will increase. Minimize these shortcomings According to U.S. Pat. No. 3,592,637, in order to partially avoid From minium powder or silicon powder and gold for alloy & or metal alloy powder for alloy It is known to use mixtures in the form of briquettes.

So, for example, 25% aluminum and chrome, manganese and iron gold. Briquettes for alloys having 75% metal are commercially available. The disadvantages of this alloying agent are 7 i to 5%! i′lJ limited alloying element νν has a much lower dissolution rate. Also, English Also in the specification of National Patent No. 2112020, a part of aluminum is chloride or fluoride. Similar mixtures have been described in which chloride-salts have been substituted. get it on the market Tablets containing chromium, manganese and iron have similarly limited dissolution. It just has speed.

Therefore, the fundamental feature of the present invention is that it does not contain the above-mentioned drawbacks of the prior art. , enables complete and rapid dissolution of alloying metals into liquid main metals, even if they are of high purity. , was to develop an additive 4Jt for gold M# fusing.

According to an uninvented method, the additives are made from fluorinated aluminum. Component A2-501 consisting of a mixture of aluminum fluoride and/or aluminum fluoride and sweetened salt It% and 1a or numerical value of joint public gold electrode In addition, 50 to 98 mji% of component B, which is different from the alloy main body metal ■, is publicly owned. And the ingredient As? This problem is solved by the fact that Yohi B exists in conjunction with Uma. Sunawa Surprisingly, the additive according to the invention has a higher alloying capacity than in accordance with the state of the art. Despite the metal content, it has an unexpectedly high dissolution rate and at the same time a complete release of alloying metals. It has been found.

The fast-dissolving additive for whole-island melts according to the invention consists of component A2-50JIL % and a share B of 50-981%.

As component A, aluminum fluoride alkali and/or aluminum fluoride Addition of aluminum chloride-containing mixtures to tin combinations using uninvented addition examples is unacceptable. can be used as long as large amounts of impurities are not introduced into the biometal. . 6. Furthermore, the melting point of the salt enclosure or salt mixture must not exceed the melting point of the main metal.

Instead of aluminum alkali fluoride, alkali fluoride and alkali fluoride are advantageously used. It is also possible to use mixtures consisting of minium. Advantageous fluorinated aluminum Alka IJ ff rational mixture is aluminum fluoride alkali public fee is at least Aluminum fluoride alkali and other salts, especially fluoride, such as It is a mixture consisting of a chloride salt and/or a chloride salt. Regarding alkaline compounds For IHt jlu 89K all alkaline salts of aluminum fluoride are used. However, natrichum and/or kaliwam salts are advantageous. 6 given.

The proportion of component A in the severely injured wound has sufficient dissolution characteristics for the number of θ vessels at the time of the wound. Must be as low as possible.

Depending on the density of the alloy metal, 1% of component A21Ui is already sufficient. Ingredient A5 ~25XN% for optimum dissolution rate and maximum concentration of alloying metal in the additive. The best combination of these can be obtained. Particularly advantageously, in the additive according to the invention Ingredient A is 10-20J1! Present in an amount of %.

50-9Bk renter, preferably 1% on 75-951 and particularly preferably 80-9031 Component B, which is said to be in the additive at a rate of 1%, is 1% or 1% alloy gold. Consisting of In principle, all alloying elements can be used for this anastomosis; Chromium, manganese and iron are particularly advantageous based on Koto 8'-11 requirements. . However, other alloying elements, for example Ni + Co * Cu + Ag *Ti, Zr, Hf, V, Nb, Ta, Mos? The name and W may be enshrined in the mud. Present in pure form in alloying gold w4 It is not necessary, but rather an alloy or mixture of several metals is desirable in the main metal. It can be used as long as no impurities appear.

It is advantageous for the present invention that both component A and component B are present in a mixed form. sister Additives are preferably in compressed or compacted form, e.g. briquettes, tablets. The size of these molded objects varies within a wide range. I can tremble. Although it is priced at 1, the molded product is large enough to be used as a mat for Todoroki Suzume. In order to have a high sedimentation rate and, on the other hand, take into account an acceptable rate of saponification, It is only that these shaped bodies do not have too great a thickness. Maximum thickness of molded object then 50wk can be assumed, the advantageous range being between 5 and 25fI+ .

In another configuration, the additive may be present in the form of a filled flux, in which case the additive is overshadowed by inappropriate materials. If you choose a corresponding material, the material can be quickly In order to release meat additives into the bath melt, the material should alloy undesirable impurities. Care should be taken not to wait in the metal bath. Use the main metal of each case. It has turned out to be particularly advantageous.

The production of the additive according to the invention consists in mixing the powdered components A and B intimately and optionally is a commonly used industrial device, for example a tablet press or a briquette soles. This can be done by compressing it using a machine or by introducing it into a light beam. pull After subsequent compaction or tamping, the compact also contains a phase, which is extremely detrimental to the dissolution rate. In order to provide a correspondingly large internal surface, the particle size of component A is <1 m thick, barbed. If the particle size of component B is not 150 μm, the particle size of component B is similarly small. There should be no dropout at 150 μm.

Most metals do not come in powder form when manufactured by conventional methods. Therefore, it is safe to crush it beforehand. Summary of the grinding process in a mill for example a ball mill, vibratory mill or impact mill shall be.

The use of the additive according to the invention allows the additive to be added to the alloy in an amount of 0.01 to 251% by weight. The additive is added to the liquid base metal to be treated, and the additive is completely and without the formation of residues. The gist is to form a homogeneous alloy in this main metal.

As a general rule, the elements introduced by the additive according to the invention are permitted. Any metal or alloy that can be used can be used. In this case , light metals, alloys, such as pure aluminum or aluminum alloys; It is clear that pure magnechrome or a magnechrome alloy is suitable for In these metals or alloys, for example, high speed and alloy formation are required. The advantages of high leakage were particularly evident.

The next example is IF+ non-invention! 5! However, the present invention does not solve this problem. There is no limit to this.

Examples 1-6 Aluminum wax (living gold striped 60:71 sieve) heated to 800℃ in a furnace, stored Due to heat, the maximum temperature loss Fi during the experiment was 60°C. Chromium (alloy composition) is added to the bath melt. Bunge, a pressed pongee mixture of the listed ingredients having a diameter of 25 mm and a height of about 15 mm It was added in the form of an additive. Chrome weight is 0.5% of aluminum It was equivalent to During the experiment, no electrical power was supplied to the furnace, so there was no induced bath movement. It didn't appear. Immediately after adding the chromium, the bath melt was stirred for 2 seconds. continuation, The first sample was taken after 2 minutes. After sample collection, stir again for 2 seconds and after 5 minutes. , the following sample was taken. Samples were collected after 10 and 15 minutes of this cycle. Then, it was repeated two more times. After that, the bath melt was stirred for 1 minute, and after 20 minutes, the bath melt was stirred for 1 minute. Samples were collected.

Aluminum powder with a particle size of 460 to 75 μm was used. dense mixture was compressed in a tablet press to approximately 70-80% of its theoretical density. Furthermore, public Two commercially available products were used that correspond to the state of the art.

From Clothing 1, the mixture used, the quality of the pressed product, and their commonly understood characteristics are recognized. I can't stand it. Experiments 1 to 6, in which additives according to the invention were used, showed that the rate of dissolution of the mixture was It is shown in relation to the amount of aluminum fluoride.

As experiments prove, 14.13&L-wave% fluoride aluminum caricum In the case of ``Choken 6 Habitsho'', Chrome has already completely understood the 2 minutes. Mow this, Aluminum fluoride Calicum 9.1" negative, already after 10 minutes chromium is the main metal Completely misunderstood in the genus (see Experiment 1) The test was carried out using a commercially available product. The two products contain only about 753 Ltqb of chromium and Approximately 25ml of binder! It only contains %.

Despite the high binder content, after 2 minutes only 9% in experiment 4 and in experiment 5 The degree of chromium elution was only 60%. Even after 10 minutes, experiment 4 Only 80% of the chromium was leached in the case of It was. After 20 minutes, only with strong agitation, experiment 4. A degree of dissolution of 100% in case of experiment 5 and 88% in case of experiment 5 was achieved. In contrast, the actual Experiment 3 showed that despite the extremely low binder content, chromium was already completely removed after 2 minutes. It shows that you have a misunderstanding. In Experiment 6, the binder was made of soluted aluminum. An additive consisting of kaliwam and aluminium is used. This combination is known It corresponds to the technical water fs (British Patent No. 2112020 Light 1). The experimental results are Despite the high binder content, there was a clear decrease in Experiment 6 compared to Experiment 1. It shows that a summer of vulgar derangement is observed. In the case of experiment B, chromium is used after 20 minutes. I finally understood it completely.

Quiet inspection report international search report EP 8700387

Claims (15)

[Claims] 1. In fast-dissolving additives for metal melts, the additive may contain aluminum fluoride. aluminum alkali and/or aluminum fluoride alkali-containing salt mixtures. Component B50 consists of 2 to 50% by weight of component A2 and one or more alloying metals. ~98% by weight, the alloying metal or metals being the main body to be alloyed. Components A and B are distinct from metals and are present in an intimate mixture. A fast-dissolving additive for metal melts with special characteristics. 2. Alkali aluminum fluoride is alkali fluoride and aluminum fluoride. 2. Additive according to claim 1, present in the form of a mixture of: 3. Aluminum fluoride alkali is combined with sodium salt and/or potassium salt. The additive according to claim 1 or 2, which is present as an additive. 4. Aluminum fluoride alkali-containing salt mixture is aluminum fluoride alkali-containing salt mixture. consisting of at least 50% by weight and with chloride salts and/or fluoride salts as a sub-component The additive according to any one of claims 1 to 3, which comprises: 5. Claims 1 to 4, wherein component A is present in an amount of 5 to 25% by weight. The additive according to any one of . 6. Claims 1 to 5, wherein component A is present in an amount of 10 to 20% by weight. The additive according to any one of . 7. Claim 1, wherein the alloying metal is chromium, manganese and/or iron. The additive according to any one of items 6 to 6. 8. Claim 1, wherein the alloying metal is an alloy and/or a metal mixture. The additive according to any one of items 7 through 7. 9. Claims 1 to 8 which are in compressed or compacted form The additive described in any one of the above. 10. The tamped or compacted compact has a thickness of <50 mm. The additive according to any one of the ranges 1 to 9. 11. Any one of claims 1 to 8 existing in the form of a filled wire Additives listed. 12. Alkali aluminum fluoride and/or alkali aluminum fluoride Component A consisting of a salt mixture containing 2 to 50% by weight and one or more alloying metals 50 to 98% by weight of component B consisting of (different from the main metal to be treated) are intimately mixed in powder form and optionally subsequently subjected to pressure. rapid for metal melts, characterized by shrinking or introducing into filled wires A manufacturing method of additives that is commonly understood as 13. Component A has a particle size <1 mm, preferably <150 μm. Method described. 14. Component B has a particle size <1 mm, preferably <150 μm. Method described. 15. The additive is added to the liquid metal in an amount of 0.01 to 25% by weight. Any one of claims 1 to 11 for alloying liquid metals Use of the listed additives.