DE1815487A1 - Selection of composition for coating the surface materials - Google Patents

Abstract

A coating suspension having a uniform viscosity is produced by mixing at a ratio of 0.8-1.2:1 (a) a homogeneous mixture of 10-40 parts by wt. alkali-fluoroborate, 30-50 parts alkali fluorosilicate, 10-25 parts animal or vegetable oil(s) or fat(s) having a m.p. >30 degrees, 8-15 parts mineral lubricating oil(s), 5-15 parts of a chlorinated paraffin having a chlorine content of 40-70%, and 3-8 parts of a surfactant with (b) a homogeneous mixture of solvents, consisting of 50-60 parts by wt. mineral lubrication oil(s), 30-40 parts non-inflammable solvent(s), and 10-20 parts of naphthenates and/or stearates.

Description

Block mold paint for making blocks made of killed and half-killed steels.

The present invention relates to an improved paint for a block mold for the production of blocks from calmed and semi-calmed Steels with a perfect surface.

Although it was known that mixtures containing bitumen or fluoride were used to apply the inner surface of the block mold to a block with a smooth surface and in order to increase the durability of the block shape, it is difficult to achieve satisfactory results.

The object of the present invention is to improve a paint for a block mold for making blocks of pacified and semi-pacified Steels with falling cast or rising cast, being a block of pacified Steel and semi-killed steel with a perfect surface is obtained.

The paint for a block mold for making blocks of killed and semi-killed steels, according to the present invention, is a suspension of homogeneous viscosity obtained by mixing a homogeneous Mixture consisting of 10-40 parts by weight of an alkali fluoroborate, 30-50 parts by weight of an alkali fluorosilicate, 10-25 parts by weight of one or more animal or vegetable oil above 01. and fats itt a melting point above 30 ° C, 8-15 parts by weight one or more mineral lubricating oils, 5-15 parts by weight of a chlorinated paraffin with 40-70 parts by weight chlorine and 3-8 parts by weight of a surfactant consists, with a homogeneous solvent mixture, which consists of 50-60 parts by weight one or more mineral lubricating oils, 30-40 parts by weight of one or more non-flammable solvent and 10-20 parts by weight of a naphthenate and / or Stearate composed, is obtained. The weight ratio in which the mixture and the solvent mixture brought together is 0.8-1.2: 1.

The paint for a blookform for making blocks of killed and semi-killed steels, according to the present invention, is a suspension made by mixing certain parts by weight of different verbs Components (animal and vegetable oil and fat, mineral lubricating oil, chlorinated Paraffin, a surfactant, a non-flammable solvent, naphthenates and stearates) with certain parts by weight of fluoroborates and fluorosilicates, previously used is obtained. Will the paint on a block form applied and then in the form of molten, killed or semi-killed steel poured, so you get a block of pacified or semi-pacified stole with a perfect surface, as shown in the following examples.

As an example of the fluoroborate used as a component of the above Mixture used in the paint according to the present invention may be mentioned: lithium. Potassium and sodium fluoroborates. Will the fluoroborate used in an amount less than 10 parts by weight, no block can be used smooth surface, the amount of fluoroborate is more than 40 Parts by weight, there are adverse effects such as brittleness or red heat brittleness of the blocks observed.

As an example of a fluorosilicate that is used as a component of the above mixture is used in the paint according to the present invention called: lithium, potassium or sodium fluorosilicates. The fluorosilicate is put together used with the fluoroborate, with a multiple effect in the production of Blocks with a smooth surface is achieved. Will the fluorosilicate in quantities used by less than 30 parts by weight and more than 50 parts by weight, so may the above effect cannot be achieved.

The core sizes of the fluoronate and the fluorosilicate are preferred less than 0.037 mm (250 still, Tayler). If the grain sizes are larger than 0.057 mm (250 still, Tayler), e @ is difficult to have a paint that can be sprayed well and one To get block with impeccable surface.

As an example of the animal and vegetable oils and fats that as a component of the mixture in the paint according to the present invention, used include: beef tallow, cocoa butter and Japan wax. Is the Melting point of animal and vegetable oils and fats below 30 ° C baser paint can be obtained. Will be animal and vegetable Oils or fats used in amounts of less than 10 parts by weight cannot be used A satisfactory thickness of the paint layer can be achieved, more than 25 When parts by weight are used, the paint layer becomes di @ k and is not uniformly and as a result, a block with a poor surface cannot be made can be obtained.

As an example of the mineral lubricating oils that are used as a component of the mixture in the paint according to the present invention are to be mentioned. Spindle oil, dynamo oil, turbine oil and machine oil. Becomes a mineral lubricating oil used in an amount less than 8 weight so if the paint is not sufficiently thin and spreadable, the mineral becomes Lubricating oil used in an amount of more than 15% by weight, do not know any other Benefits to be achieved The chlorinated paraffin, which is used as a component of the mixture is used in the paint according to the present invention, must have a chlorine content of 40-70% by weight.

If the proportion of chlorinated paraffin is less than 5 weight%, so no influence on the surface of the block can be observed, the proportion is of chlorinated paraffin is greater than 15% by weight, no improvement in surface smoothness can be achieved of the block can be achieved.

As examples of the surfactants used as the component of the mixture in the anabolic agent, used according to the present invention the following may be mentioned: a) Anionic surface-active agents such as "Gardiol" (Na fatty alcohol sulfonate; "Gardinol" is the trade name) "Teepol" (Na salt an alkenol sulfonate; "Teepol" is the trade name) "Igepon" Na (Na salt an alkylbenzenesulfenic acid; "Igepon" Na is the trade name) "Nekal" (Na salt an alkylnaphthalene sulfonic acid; "Nekal" is the trade name) b) Cationic, surface-active With el like "Sapamin" (Trimethylaminoäthylalkylamidhalogenid; "Sapamin" "Sapamin" is the trade name) "Repellate" (alkyl pyridinium sulfate; "Repellate" is the Handolsusme) "lissalmin" (alkyltrimethylammonium halide; "lisslamin" is the trade name) c) Nonionic surfactants such as "Leonil" (polyoxyethylene alkyl ether; "Leonil" is the trade name) "Soromin" (polyoxyethylene fatty acid ester; "Soromin" is the trade name) "Span" (sorbitol fatty acid ester; "Span" is the trade name) d) Amphoteric surfactants such as "Pluronic" (polyoxyethylene polyoxypropylene; "Pluronic" is the trade name) "Betain" (alkyl betaine; "Betain" is the trade name) The above-mentioned surface-active agents are obtained in amounts of 3-8% by weight applied to the weight of the mixture. Is the surfactant content less than 3% by weight, the sprayability of the paint is accordingly of the present invention, is insufficient and the paint film formed is not homogeneous, because the dispersion is insufficient and the powdery components of the paint, especially as alkali fluoroborate or fluorosilicate Deposited at an early stage is the surfactant content over 8 weight cannot further improve the emulsifying and dispersing effect be achieved.

The mineral lubricating oils that are used as components of the solvent mixture are preferably identical to those that serve as components of the mixture be used. Are the mineral lubricating oils used in quantities outside the Range of 50-60% by weight is used, so it is difficult to obtain a sufficient one To achieve thin liquid and thus easy spreadability of the paint.

As an example of the non-flammable solvents that are used as components of the solvent mixture are used, his mentioned: perchlorethylene, Trichlorethylene and carbon tetrachloride. The non-flammable solvents are used to inhibit the flammability of the paint at the start of drying after application to the inner surface of the block form.

If the content of non-flammable solvents is less than 30 % By weight, the above-mentioned inhibition is unsatisfactory, a use of more than 40% by weight of a non-flammable solvent is not economical.

As an example of the naphthenates and stearates that are used as components of the solvent mixture can be mentioned: calcium, potassium and Sodium naphthenate and stearate. The naphthenates and stearates are used for dispersion the mixture in the solvent mixture. Is the amount of stearates and napthenates less than 10% by weight, so no homogeneous suspension can be obtained Amounts over 20% by weight do not increase the dispersing effect any further.

The mixing ratio of the solvent mixture to the mixture in Exit agent, according to the present invention, should be 1: 0.8-1.2. If the mixing ratio is 1: more than 1.2, the paint coating will not be smooth achieved, the layer thickness of the coating is not uniform, so that no blocks can be obtained with a good surface. If the mixing ratio is 1 s less than 0.8, a smooth coating is achieved, but the effect is no longer reliable and blocks with a perfect surface cannot therefore be obtained.

The application of the paint, according to the present invention, onto the block shape can be easily done by any painting method such as brushing or spraying.

It is desirable and effective to paint the interior on Apply the surface of the block form evenly.

The layer thickness of the coating depends on the shape and size of the inner one Surface of the block shape, the temperature of the block, the type of steel, etc., different. The preferred layer thickness of the coating is approx. 0.2 mm.

The preferred amounts of paint that are used are as follows: Weight of the block to be produced per Ton block weight more than 5 tons approx. 100 g 1-5 tons less than approx. 150 g 1 ton approx. 200 g The appropriate temperature of the block form when applying the paint is approx. 80-150 ° C, a satisfactory effect can also be achieved if the Temperature is between normal temperature and 200 ° C.

In previous paints of this type, the emulsifying or Dispersant separated in the course of storage and the effective component has failed.

In the paint according to the present invention, wdurden on the contrary, these disadvantages are not observed and the paint, accordingly of the present invention, has a constant and homogeneous composition and Concentration.

In particular, the mixture and the solvent mixture can each be made and jarred for themselves. The mixture and the solvent mixture can only be used in a suitable ratio before the paint is used can be mixed and the paint thus obtained can be applied to the inner surface the sheet metal form are applied. The paint used for the block mold has such a suitable, constant consistency. The paint then has good spreadability and the loss of paint is considerably reduced, so that the desired effect is achieved in the various block making conditions can be.

The paint according to the present invention is useful for the production of blocks from calmed or semi-calmed steel with flawless Surface by falling and rising pouring.

The following examples illustrate the present invention without limit them.

Examples 1, 2 and 3 Examples No. 1 No. 2 No. 3 Composition Weight Weight-weight of the mixture part parts parts sodium fluoroborate (goes through a Sieve with 0.057mm 15 30 20 - 250 @@@ h - clear mesh size through) sodium fluoroborate (goes through a sieve with 0.057mm 40 30 29 - 250 @@@ h - clear mesh size) Beef suet 20. 10 12 Japan wax - - 8 Spindle oil 15 8 8 Machine oil - - 5 Chlorinated paraffin (Chlorine content 70%) 5 15 12 Cationic, surface -5 7 6 amine-type active agents The above components were brought together at room temperature and formed into a homogenous Mixture processed.

Examples Composition of No. 1 No. 2 No. 3 Solvent Weight Weight-Weight mixed parts parts parts Spindle oil 50 60 50 Turbine oil - - 25 Perchlorethylene 35 30 18 Trichlorethylene - - 20 Calcium naphtenate 7 5 7 Calcium stearate 8 5 - The above ingredients were mixed at room temperature and stirred to obtain a homogeneous mixed solvent. Then the above was carried out Misohung mixed with the above solvent mixture in a weight ratio of 1: 1, in order to obtain a paint for the block form which is present as a homogeneous suspension obtain. On the inner surface of a square block shape was used for the production of steel blocks with a ton weight of the paint with the help of a spray gun applied evenly at 1200C.

As a comparative example, the inner surface of a square Block form of the same shape and size tar is applied.

120 steel blocks were each used by falling casting from block molds which are treated and treated as described above. The received The results are given in the table below.

Steel Paint Steel Steel Blocks Steel Blocks Fold in number of kind medium blocks without with less with more melted flawless sand holes than 10 sand zen metal blocks holes holes tall (%) +1 tar 3 79 38 many 92.3 S15C Example # 1 107 9 4 little 95.9 (JIS G example # 2 111 8 1 little 96.1 4051) Example No. 3 108 12 0 little 95.4 tar 4 65 51 many 90.5 +2 Example no.1 102 16 2 little 96.0 SCM4 (JIS G example no.2 104 16 0 little 96.5 4051) example no.3 110 9 1 little 96.6 tar 7 71 42 lots 91.7 +3 example no.1 114 3 3 little 95.8 SUT3 (JIS G example No. 2 98 14 8 little 95.1 4801) Example no.3 113 7 0 little 95.7 Composition of the steels +1 C 0.13-0.18%; Si 0.15-0.35%; Mn 0.30-0.60%; P <0.030%; S <0.035%; Cr 0%; Mo 0%; Fe remainder; +2 C 0.38-0.43%; Si 0.15-0.35%; Mn 0.60-0.85%; P <0.030%; S <0.30%; Cr 0.90-1.2%; Mo 0.15-0.30%; Fe remainder; +3 C 0.75-0.90%; Si 0.15-0.35%; Mn 0.30-0.60%; P <0.035%; S <0.035%; Cr. 0%; Mn 0%; Fe rest.

From the table above it can be clearly seen that when using of the paint according to the present invention, the wrinkling the metal melt is low.

If the paint, according to the present invention, is used, an average of 95.9% perfect blocks are obtained since the The formation of sand holes and wrinkles in the melt is considerably reduced. Will in contrast to the tar used, the average is 91.5% flawless blocks obtain. It follows that when using the paint, accordingly of the present invention, 4.4% more flawless blocks can be obtained than with the use of tar.

If tar is used as a paint for the block form, it becomes a little Carburization of the surface of the steel block is considered to be an adverse effect. at the use of the paint according to the present invention occurred no adverse effects such as carburization. Contamination of the inner surface the block shape by the paint and adhesion of paint residues on the inner surface of the blookform, in appearance.

If the paint for the block form, according to the present Invention, used, the surface of the steel block produced has a metallic one Colour.

Claims (11)

P a t e n t n s p r U a h e 1. Anatriohmittel ture a block form for the production of blocks killed and semi-killed steels, characterized in that it is a suspension with a uniform viscosity is and by mixing a uniform Mixture consisting of 10 to 40 parts by weight of an alkali fluoroborate, 30 to 50 parts by weight of an alkali fluorosilicate, 10 to 25 parts by weight of an or several animal or vegetable oils and fats with a melting point above 30 ° C, 8 to 15 parts by weight of one or more mineral lubricating oils, 5 to 15 parts by weight of a chlorinated paraffin with a chlorine content of 40 to 70 % and 3 to 8 parts by weight of a surfactant with a uniform Solvent mixture consisting of 50 to 60 parts by weight of one or more of the mineral lubricating oils mentioned, 30 to 40 parts by weight of one or more non-flammable solvent and 10 to 20 parts by weight of naphthenant and / or Stearates in a weight ratio ton 0.8 - 1.2: 1 has been produced. 2. Paint according to claim 1, characterized in that the Alkali fluoroborate potassium, sodium and lithium fluoroborate with a grain size below 0.057 mm (250 mesh, Tayler) is. 3. Paint according to claim 1, characterized in that the Alkali fluorosilicate potassium, sodium and lithium fluorosilicate with a grain size is below 0.057 mm (250 mesh, Tayler). 4. Paint according to claim 1, characterized in that the animal and vegetable oils and fats have a melting point above 30 ° C and made of beef tallow, cocoa butter or Japan wax. 5. Anstriohmittel according to claim 1, characterized gekennzolchnot that the mineral lubricating oils are spindle oils, dynamo oils, turbine oils and masohine oils. 6. painting agent according to claim 1, characterized in that the surfactants are anionic. 7. Paint according to claim 1, characterized in that the surfactants are cationic. 8. Paint according to claim 1, characterized in that the surfactants are nonionic. Paint according to Claim 1, characterized in that the surface-active Agents are amphoteric. 10. Paint according to claim 1, characterized in that the non-flammable solvents perchlorethylene, trichlorethylene and carbon tetrachloride are. 11. Paint according to claim 1, characterized in that the Naphthenates and Stearates Calcium, potassium and sodium naphthenates and stearates are.