KR101098373B1 - Composition For Slag Remover - Google Patents

Abstract

The present invention relates to a composition for removing slag, 30 to 65% by weight of a hydrocarbon solvent having a boiling point of 100 to 200 ℃, 22 to 35% by weight of fluorine compounds, 10 to 20% by weight of diacetone alcohol and plasticizer 3 To 15 wt%.

The slag remover composition is excellent in the slag removal effect, it is possible to shorten the slag removal time can improve the welding productivity.

Slag, slag remover, composition, welding

Description

Composition for Slag Remover

The present invention relates to a composition for slag removal having excellent slag removal effect.

Typically, when manufacturing a ship or heavy equipment, such as welding the angles such as iron plate or bar to each other to form a large sculpture or T-bar to perform the function of reinforcement. At this time, when welding an iron plate, an angle, etc., a weld generate | occur | produces a bead and a slag is coat | covered. The slag has to be removed immediately after welding, and is usually removed by using a hammering tool such as a hammer to break the slag and use a brush or the like.

In this case, in order to remove the slag, the operator has to remove the slag with a hammer, a blush, etc., so that a lot of time is required to remove the slag, thereby reducing the efficiency of slag removal. In addition, when the slag is not completely removed there is a problem that a bad welding occurs.

An object of the present invention for solving the above problems is to provide a composition for removing slag that can effectively remove slag.

The present invention for achieving the above object is 30 to 65% by weight of a hydrocarbon solvent having a boiling point of 100 to 200 ℃, 22 to 35% by weight of fluorine compounds, 10 to 20% by weight of diacetone alcohol (plasticizer 3 to 15) Provided is a composition for slag remover containing wt%.

Since the composition for slag remover of the present invention is excellent in slag removal effect, it improves the reliability of the welding site, and reduces the time required for slag removal can improve the productivity during the welding operation.

The present invention relates to a composition for removing slag, 30 to 65% by weight of a hydrocarbon solvent having a boiling point of 100 to 200 ℃, 22 to 35% by weight of fluorine compounds, 10 to 20% by weight of diacetone alcohol and plasticizer 3 To 15 wt%.

The hydrocarbon solvent may be selected from the group consisting of an aromatic hydrocarbon solvent, an aliphatic hydrocarbon solvent and an alicyclic hydrocarbon solvent.

The aromatic hydrocarbon solvent may be used as Cocosol-150 (SK company), P naphtha, solvent naphtha, Solvetso 100 (Esso Sekiyu Co., Ltd.), Solveso 150 (Etso Sekiyu Co., Ltd.), Solvex 200 ( Eso Sekiyu Co., Ltd.). In addition, the solvent naphtha includes benzene homologs of xylene or more, trimethyl benzene, ethyl benzene and the like.

The fluorine compound may be a HCFC (hydrochlorofluorocarbon) compound or an HFC (hydrofluorocarbon) compound.

The diacetone alcohol is 4-hydroxy-4-methyl-2-pentanone or 4-methyl-3-pentanol-4-one (2-methyl-3 -pentanol-4-one).

The plasticizer may be selected from the group consisting of castor oil, mineral oil, phthalate plasticizer, and phosphorus plasticizer.

The HCFC (hydrochlorofluorocarbon) compound is composed of monochloro difluoro methane, 1-chloro-1,1-difluoro ethane and mixtures thereof Any one from the group can be selected.

The HFC (hydrofluorocarbon) compound is 1,1,1,2-tetrafluoroethane (1,1,1,2-tetrafluoroethane), 1,1-difluoro ethane (1,1-difluoro ethane), 1 1,1,2,2,3,4,5,5,5-decafluoropentane (1,1,1,2,2,3,4,5,5,5-decafluoro pentane), 1, 1,1,2,2,3,3,4,4,5,5,6,6-tridecafluorohexane (1,1,1,2,2,3,3,4,4,5, 5,6,6-tridecafluoro hexane), 1,1,1,3,3-pentanefluorobutane (1,1,1,3,3-pentanefluoro butane), 1,1,1,2,2,3 , 3,4,4-nonnafluoro hexane (1,1,1,2,2,3,3,4,4-nonafluoro hexane) and 1,1,2,2,3,3,4-heptafluoro One or a mixture of two or more selected from the group consisting of chlorocyclopentane (1,1,2,2,3,3,4-heptafluorocyclopentane) may be selected.

The phthalate plasticizer, dibutylphthalate (DBP), di-isobutyl phthalate (DIBP), dihexyl phthalate (DHP), dioctyl phthalate (DOP), diisoocta 1 or 2 selected from the group consisting of diiso-octyl phthalate (DIOP), dinonyl phthalate (DNP), diisodecyl phthalate (DIDP) and benzyl butyl phthalate (BBP) Any one can be selected from the group consisting of mixtures of species or more. Phosphorous plasticizers also include tri-ortho-cresyl phosphate (TCP), methylphenyl diphenyl phosphate (DPK), trimethyl phosphate (TMP), and triethyl phosphate. group consisting of phosphate (TEP), tributyl phosphate (TBP), dimethylphenol phosphate (TXP) and tri (2-butoxyethyl) phosphate (tris (2-butoxyethyl) phosphate (TBEP) One or a mixture of two or more selected from may be selected.

Hereinafter, with reference to the preferred production examples, comparative examples of the present invention will be described in detail. The following Preparation Examples and Comparative Examples are only presented to understand the contents of the present invention, and those skilled in the art will be capable of many modifications within the technical spirit of the present invention. Therefore, the scope of the present invention should not be construed as being limited to these production examples, comparative examples.

Preparation Example: Slag Remover

In order to manufacture a slag remover using the composition for slag remover of the present invention, Cocozol-150 (SK Corporation) was prepared as an aromatic hydrocarbon solvent, and 4-hydroxy-4-methyl-2-pentane as diacetone alcohol. Warm (4-hydroxy-4-methyl-2-pentanone) was prepared.

The present invention by mixing the Cocozol-150 (SK company) 54% by weight, monochlorodifluoro methane 30% by weight, 4-hydroxy-4-methyl-2-pentanone 11% by weight, castor oil 5% by weight To complete the slag remover.

<Comparative Example 1>: Time taken for slag removal

In order to confirm the slag removal effect of the slag removal composition of the present invention, the time required to remove the slag was measured.

First, as shown in FIG. 1, AH36 steel plate (150 * 1,000 * 40mmt) was improved by 40 degree and welded. The welding used a fluxcored arc welding material with a diameter of 1.4 mm of AWSE71T-1, using 100% CO ₂ gas.

A longitudinal length of 1,000 mm of the AH 36 steel sheet was continuously welded. In this case, the time taken to remove the slag generated after one pass welding is measured, and the time taken to remove the slag generated after two pass welding is measured, and in this manner, three pass, four pass, and five pass welds are used. The slag removal time which occurred afterwards was measured. Since slag did not occur after 6 pass welding, the time taken to remove the slag generated after 1 pass to 5 pass welding was measured.

At this time, the slag present in the first 500mm of the AH 36 steel sheet was removed by spraying the slag remover of the present invention, and the slag present in the second 500mm of the steel sheet was removed using a hammer as a control. The welding was continued until the grooves were completely filled, and all 22 passes were taken, and FIG. 2 shows a schematic diagram welded with 22 passes.

The state which photographed the AH 36 steel plate from which slag was removed was shown in FIG. The right part (spray notation) of Figure 3 is to remove the slag by spraying the slag remover of the present invention, the left part is to remove the slag using a hammer as a control. Thus, Table 1 shows the time taken to remove the slag generated after 1 pass to 5 pass welding.

[Table 1]: Time spent on slag removal

Condition 1 pass 2 pass 3 pass 4 pass 5 pass Slag remover
(Original invention) 15 seconds 10 sec 7 sec 5 seconds 2 seconds hammer
(Control group) 45 sec 38 seconds 11 seconds 7 sec 3 sec

As can be seen from the results of Table 1, the use of the slag remover of the present invention was excellent in the effect of slag removal, it took much less time than when slag was removed using a hammer as a control. In particular, when removing slag generated after one pass welding, it took only 15 seconds when using the slag remover of the present invention. This is one third shorter than the time spent on slag removal of the control group.

Comparative Example 2 Yield Strength, Tensile Strength and Impact Strength

Since the more slag generated after welding, the less impurities are included, the yield strength, tensile strength and impact impact of the welded site become stronger. Therefore, a tensile specimen was taken from the welded portion (right part of FIG. 3) while slag was removed using the slag remover of the present invention, and the yield strength and tensile strength were measured. Then, using the slag remover of the present invention to remove the slag, the impact specimen (Charpy specimen) was taken from the 1 pass, 2 pass, 3 pass portion of the welded portion (right part of Figure 3) to measure the impact strength.

The yield strength is the stress that causes the tensile specimen to elongate to the specified percentage of the length between the marks for the length of time specified in the tensile test. The tensile strength refers to the maximum stress until the tensile test specimen is broken by the tensile load. The impact strength refers to the force required to cut the impact specimen by giving an impact load.

As a control, a tensile test piece and an impact test piece were taken from the welded portion (left part of FIG. 3) while removing slag using a hammer, and yield strength, tensile strength, and impact strength were measured as above.

The tensile specimen was taken from the center of the weld metal, and the impact specimen was taken from the root. The location where the specimens were taken is shown in FIG. 4, and the tensile and impact strengths of the specimens are shown in Table 2.

[Table 2]: Yield strength, tensile strength and impact strength

Condition
Tension Specimen Impact specimen Yield strength The tensile strength 1 pass 2 pass 3 pass Average Slag remover
(Original invention) 590 Mpa 627 Mpa 49 J 46 J 29 J 41 J hammer
(Control group) 567 Mpa 607 Mpa 31 J 28 J 26 J 28 J

As can be seen from the results of Table 2, the yield strength and tensile strength of the tensile test piece using the slag remover of the present invention was stronger than that of the control. In addition, the impact strength of the impact specimen when using the slag remover of the present invention was also much stronger than that of the control.

The above results are attributable to the fact that welding was effectively performed when the slag remover of the present invention was used, because the effect of slag removal was excellent and almost no impurities were present.

The present invention has been described above in connection with specific embodiments of the present invention, but this is only an example and the present invention is not limited thereto. Those skilled in the art can change or modify the described embodiments without departing from the scope of the present invention, and such changes or modifications are within the scope of the present invention. In addition, the materials of each component described herein can be readily selected and substituted for various materials known to those skilled in the art. Those skilled in the art will also appreciate that some of the components described herein can be omitted without degrading performance or adding components to improve performance. In addition, those skilled in the art may change the order of the method steps described herein depending on the process environment or equipment. Therefore, the scope of the present invention should be determined by the appended claims and equivalents thereof, not by the embodiments described.

1 shows a schematic view of an AH36 steel sheet (150 × 1,000 × 40 mmt) of Comparative Example 1. FIG.

2 shows a schematic view of a 22 pass weld of Comparative Example 1. FIG.

3 is a photograph taken of the AH 36 steel sheet from which the slag of Comparative Example 1 was removed.

Figure 4 shows the position where the tensile specimen and the impact specimen of Comparative Example 2 were taken.

Claims (8)

30 to 65% by weight of any one selected from the group consisting of an aromatic hydrocarbon solvent, an aliphatic hydrocarbon solvent and an alicyclic hydrocarbon solvent, and having a boiling point of 100 to 200 ° C; Monochloro difluoro methane, 1-chloro-1,1-difluoro ethane, 1,1,1,2-tetrafluoro ethane ( 1,1,1,2-tetrafluoroethane, 1,1-difluoro ethane, 1,1,1,2,2,3,4,5,5,5-decafluoro Lopentane (1,1,1,2,2,3,4,5,5,5-decafluoro pentane), 1,1,1,2,2,3,3,4,4,5,5,6 , 6-tridecafluorohexane (1,1,1,2,2,3,3,4,4,5,5,6,6-tridecafluoro hexane), 1,1,1,3,3-pentane Fluorobutane (1,1,1,3,3-pentanefluoro butane), 1,1,1,2,2,3,3,4,4-nonafluoro hexane (1,1,1,2,2 , 3,3,4,4-nonafluoro hexane) or 1,1,2,2,3,3,4-heptafluorocyclopentane (1,1,2,2,3,3,4-heptafluorocyclopentane) 22 to 35% by weight of a fluorine compound; 4-hydroxy-4-methyl-2-pentanone (4-hydroxy-4-methyl-2-pentanone) or 2-methyl-3-pentanol-4-one (2-methyl-3-pentanol-4- 10 to 20% by weight of one) diacetone alcohol; And A composition for slag remover containing 3 to 15% by weight of any one plasticizer selected from the group consisting of castor oil, mineral oil, phthalate plasticizer and phosphate plasticizer. delete delete delete delete delete The method of claim 1, The phthalate plasticizer, dibutylphthalate (DBP), di-isobutyl phthalate (DIBP), dihexyl phthalate (DHP), dioctyl phthalate (DOP), diisoocta 1 or 2 selected from the group consisting of diiso-octyl phthalate (DIOP), dinonyl phthalate (DNP), diisodecyl phthalate (DIDP) and benzyl butyl phthalate (BBP) Slag remover composition, characterized in that the mixture of more than one species. The method of claim 1, The phosphorus plasticizer is tri-ortho-cresyl phosphate (TCP), methylphenyl diphenyl phosphate (DPK), trimethyl phosphate (TMP), triethyl phosphate (TEP) , Tributyl phosphate (TBP), dimethylphenol phosphate (TXP) and tri (2-butoxyethyl) phosphoric acid (tris (2-butoxyethyl) phosphate (TBEP) Or a mixture of two or more kinds of slag removers.

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