JP5410046B2 - Weld spatter adhesion inhibitor - Google Patents

Description

  The present invention relates to a welding spatter adhesion preventing agent suitable for use in preventing welding spatter from adhering to an object to be welded such as steel.

  In general, it is known that when a steel material or the like is welded, spatter in a granular form is scattered from the welding arc, and this spatter adheres to the surface of the object to be welded. And if this is left as it is, the unevenness | corrugation by sputtering will remain on the surface of a welding target object, and the commercial value of a welding product will fall.

  Therefore, a water-type or non-water type welding spatter adhesion preventing agent is applied in advance to the surface of the welding object so as to suppress spatter generated during welding from adhering to the surface of the welding object. (See Patent Documents 1, 2, and 3).

Japanese Patent Publication No. 3-50638 JP-A-7-88685 JP 2000-176680 A

  In this case, Patent Literature 1 describes a water-type and non-water type weld spatter adhesion inhibitor. Patent Document 2 describes a non-water type welding spatter adhesion preventing agent, which includes, for example, a saturated aliphatic or saturated alicyclic hydrocarbon solvent and a base material (alkyd resin, mineral oil or Surfactant).

  Patent Document 3 describes an aqueous type welding spatter adhesion preventive agent, and in this case, spatter adhesion containing an alkali metal salt of silicic acid, fluoride ion, hydrogen carbonate ion, water-soluble alcohol, and the like. An inhibitor is configured.

  By the way, as for the welding spatter adhesion preventing agent according to the prior art, for example, a non-aqueous type uses an organic solvent, so that it has odor and toxicity, and is liable to deteriorate the environment of the work site. Moreover, it is easily affected by heat generated during welding work, and environmental problems due to organic solvents, disposal problems, and the like also occur.

  On the other hand, an aqueous type spatter adhesion inhibitor does not adversely affect the working environment during welding. However, the aqueous type inhibitor has a performance problem that the effect of preventing the adhesion of spatter to the welding object is not always sufficient.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to prevent spatter adhesion to a welding object and improve its performance while taking advantage of the aqueous type. It is an object of the present invention to provide a welding spatter adhesion preventing agent.

  In order to solve the above-described problems, the welding spatter adhesion preventive agent according to the present invention is used by applying to the periphery of the welded portion in order to prevent spatter during welding from adhering to the periphery of the welded portion.

The feature of the configuration adopted by the invention of claim 1 is that a thickener is blended in at least one base oil selected from a mineral oil base oil, a synthetic base oil, and a biodegradable base oil. The grease thus produced is mixed with the grease added to the grease and water. The grease is 15 to 20 wt%, the wax is 15 to 20 wt%, and the water is mixed as the balance. It is in the configuration .

The feature of the constitution adopted by the invention of claim 2 is that a thickener is blended in at least one base oil selected from mineral oil base oil, synthetic base oil and biodegradable base oil. And the wax added and mixed with the grease and water, and the grease is 15 to 20 wt%, the wax is 15 to 20 wt%, and the water and additive as the balance Ru near it was configured to blend and.

Further, according to the invention of claim 3, the thickener of the grease is composed of a non-soap soaps and / or urea containing at least calcium sulfonate complex or a lithium complex.

The invention of claim 4 is the water, has a configuration in which Ru is present in the form of an emulsion within the composition by high-speed stirring.

Furthermore, according to invention of Claim 5 , the said additive is comprised with surfactant or an antifoamer.

  In this case, as the additive, for example, 0 to 5 wt% of an antifoaming agent is blended. Further, as the additive, for example, 0 to 10 wt% of a surfactant having an emulsion generation function is blended. In some cases, this spatter adhesion inhibitor can also contain a solid lubricant, an extreme pressure additive and / or an oily agent as the additive.

  In this spatter adhesion preventing agent, it is preferable to use carnauba wax as the wax.

  In this spatter adhesion inhibitor, the water is present in the form of an emulsion in the composition. And this emulsion is produced | generated by mixing at high speed using a mixer or a homogenizer, when mixing the said water with the composition which consists of components other than the said water.

  This spatter adhesion preventing agent is prepared by adjusting the blending ratio of the wax and grease to, for example, 1: 1 or 2: 1. Moreover, this spatter adhesion inhibitor may adjust the blending ratio of the wax and grease to 1: 2.

The welding spatter adhesion preventive agent according to the first aspect of the present invention can be produced by blending 15 to 20 wt% of grease, 15 to 20 wt% of wax, and water as the balance in the weight ratio. In this case, an additive can be blended with water as in the invention of claim 2. Since the welding spatter adhesion preventive agent according to the first and second aspects of the invention is a non-solvent adhesion preventive agent (liquid) based on water as described above, it is ignited by the influence of high temperature and high heat generated during welding. There is no fear of the occurrence of, for example, application work or the like on the object to be welded can be easily and safely performed. In addition to water, it is manufactured as a liquid mainly composed of 15 to 20 wt% grease and 15 to 20 wt% wax. The prevention effect can be sufficiently enhanced. Moreover, the spatter adhesion inhibitor mainly composed of grease and wax can be easily removed using a solvent such as methylene chloride, kerosene, light oil, etc., and the spatter adhesion inhibitor can be removed after the welding operation is completed. The removal work can be easily performed, and the waste liquid does not adversely affect the environment.

Further, 15 to 20 wt% of wax is necessary for suppressing the occurrence of stickiness and the like when the spatter adhesion preventing agent is applied to the surface of the base material (welding object) and dried. If wax is not used, stickiness remains on the coated surface, which may cause dust and sand particles to adhere to the surface of the base material, possibly damaging the surface of the base material during welding operations. Get higher. However, by adding wax, the occurrence of stickiness can be suppressed, and the application surface of the spatter adhesion preventing agent can be kept clean. In addition, the adhesion force to the steel material (the welding object) is strengthened by the wax, and an effect of preventing scattering in a state where the spatter adhesion inhibitor made of liquid is applied can be obtained.

Moreover, since the invention of claim 3 uses, for example, a calcium sulfonate complex as a grease thickener, the function of preventing spatter adhesion can be enhanced by its function. In addition, the adhesion force to the steel material (the welding object) is strengthened by the wax, and an effect of preventing scattering in a state where the spatter adhesion inhibitor made of liquid is applied can be obtained. That is, it was confirmed that this spatter adhesion preventing agent formed a calcium sulfonate complex film on the coated surface upon drying after coating, and that this film has a high spatter adhesion preventing performance. The spatter adhesion preventive agent can be softened unlike the conventional one, and can be easily removed before solidification, and the removal performance can be improved.

On the other hand, according to the invention of claim 4 , since water is present in the form of an emulsion in the composition by high-speed stirring, the grease, wax and water are in a so-called emulsified state, and the coating performance of the spatter adhesion inhibitor can be improved. In a dried state after application, grease and wax remain, and a film having a high spatter adhesion preventing performance can be formed on this application surface. In this case, the film thickness can be controlled by the mixing ratio of water, and a film thickness suitable for the application can be easily realized.

Further, in the invention of claim 5 , since the surfactant or antifoaming agent is used as an additive to the spatter adhesion preventing agent, the sputter adhesion preventing agent is applied to stabilize the dried film, The quality of the film can be improved.

  Hereinafter, the welding spatter adhesion preventing agent employed in the embodiment of the present invention will be described.

  The weld spatter adhesion preventive agent according to the present embodiment, in particular, contains a thickener in at least one base oil selected from mineral oil base oil, synthetic base oil and biodegradable base oil. The grease thus produced is characterized in that at least a wax and water are mixed and stirred.

  As the grease contained in this spatter adhesion preventive agent, a synthetic oil or mineral oil excellent in low temperature property, heat resistance, rust resistance and load resistance, preferably a synthetic lubricating oil is used as a base oil, and an increase in excellent low temperature property is achieved. A grease composition (for example, a grease composition described in Japanese Patent Application Laid-Open No. 2002-265969) obtained by blending a calcium sulfonate complex compound as a thickener can be used.

  As the wax, among waxes, carnauba wax prepared by collecting from leaves of plant-derived carnauba palm trees is most preferable. Also, when paraffin wax is used as the wax, it is dried after being applied, but re-emulsified even after drying, and the phenomenon that the film on the coated surface cannot be maintained occurs. is there.

  The welding spatter adhesion preventive agent according to the present invention first prepares a grease having a calcium sulfonate as a base as a thickener. The main function of this grease is to prevent adhesion of weld spatter. Thereafter, a wax based on plant-derived wax, sodium alkyl sulfonate, which is one of surfactants, and silicone oil, which is an antifoaming agent, are added as necessary to make a base lubricant.

  In this case, the wax is necessary to suppress stickiness after drying. Without wax, stickiness is generated, dust is likely to be attached, and the surface of the base material (the welding object) may be damaged. Further, when an antifoaming agent or a surfactant is not used, the quality of the film during drying is not stable, and the performance as a spatter adhesion preventing agent tends to be reduced.

  The water contained in the weld spatter adhesion inhibitor is present in the form of an emulsion in the composition by high-speed stirring. In this case, grease and water are made into an emulsion using a homogenizer at a blending ratio of 1: 1, for example. In this embodiment, since the lubricant (grease) and water are present in an emulsified state, only the lubricant remains by drying after application, and a film having adhesion preventing performance of weld spatter can be formed.

  The film thickness is controlled by the mixing ratio of water. For this reason, it is possible to change the performance and application required for preventing spatter adhesion in accordance with the proportion of water. That is, when the mixing ratio of water: lubricant is 1: 1, it has the same rust prevention ability and spatter adhesion prevention performance as rust prevention oil, but when it is 2: 1, the rust prevention ability and spatter adhesion prevention performance are relative. fall into. However, in this case, workability at the time of application can be improved as a spatter adhesion preventing agent.

  Next, the manufacturing method of the welding spatter adhesion inhibitor according to the present invention will be described.

  In this method of producing an anti-spattering agent, water (in some cases, a surfactant together with water) is gradually added to a grease obtained by blending a calcium sulfonate complex as a thickener with a base oil. Produces good emulsions while promoting formation.

  Then, the emulsion thus produced is gradually added with stirring to produce a paste as a whole, and the remaining water is further added to the paste to produce an aqueous solution in an emulsion state. In this case, an aqueous solution may be produced by adding an antifoaming agent together with water.

  Finally, the aqueous solution is filtered using, for example, a 60 to 100 mesh filter to prepare a weld spatter adhesion inhibitor made of liquid, and after transferring to a container, the container is sealed to prepare a liquid product (weld Complete the anti-spattering agent). In addition, the penetration of grease used here is NO. 2 (265-295). However, the grease usage consistency range is NO. 0-NO. 3 (385 to 220) can be used, and this consistency range is considered to be an appropriate range of grease hardness.

  In addition, in the method for producing a weld spatter adhesion preventing agent, when water is gradually added to the grease, it is preferable to add a surfactant to form an emulsion. As the surfactant, for example, a surfactant containing at least one of anionic, nonionic, zwitterionic, and cationic is used. Surfactant is necessary to facilitate mixing of grease and water. However, if the grease uses calcium sulfonate complex as a thickener, mixing is possible even without surfactant. It is.

  Further, when the wax is mixed with an emulsion of water and grease, the wax can be easily mixed to form a paste by dissolving the wax by heating or the like. In addition, the stirring for mixing the grease and water (in some cases, the surfactant with water) is first stirred at 500 to 800 rpm using a high-speed mixer or an ultrasonic mixer, and the rotational speed is gradually increased. Finally, stirring is performed at a high speed of about 2000 to 3000 rpm until the whole becomes a uniform emulsion. Alternatively, grease and water (or water and a surfactant) may be mixed using a homogenizer so that the whole becomes a uniform emulsion state.

  In particular, when a wax is mixed with an emulsion of water and grease to produce a wax emulsion, the wax emulsion is scattered at the time of stirring by stirring at low speed first and gradually stirring at high speed to mix. Adhering to the stirring vessel and avoiding solidification can be avoided.

  The welding spatter adhesion preventing agent according to the present invention mixes a wax emulsion that tends to solidify well with an emulsion of water and grease, and further adds water to make an aqueous type (non-solvent type) product. Applicability to the surface of the target base material is improved.

  Table 1 below shows Examples A to E in which wax (water or various additives) is blended with grease (calcium sulfonate complex grease) obtained by blending a thickener with a base oil. The result of having performed the performance test of whether welding spatter adheres is shown.

  In Table 1, with respect to the result of applying the welding spatter adhesion inhibitor of each sample (Examples A to E) to the base material (steel plate) to be welded, those that can be applied very easily are marked with ◎, and good Things are shown as ○. And after apply | coating each sample to a steel plate, the welding operation was performed and it was confirmed by visual observation whether there exists spatter adhesion.

  As can be seen from Table 1, in Example A, the blending ratio of water is as high as 70 wt% (% by weight) and does not contain a surfactant and an antifoaming agent. However, it can be seen that the sample of Example A has very good coating properties and can prevent welding spatter adhesion. Therefore, it can be seen that the welding spatter adhesion preventive agent of Example A is suitable for application to a base material to be welded and also has a good weld spatter adhesion prevention performance.

  In Examples B to D, the mixing ratio of water is gradually reduced to 65 to 55 wt%. In this case, a surfactant is added, but no antifoaming agent is added. About the welding spatter adhesion inhibitor of Examples B-D, applicability | paintability is favorable and it turns out that adhesion of welding spatter can fully be prevented.

  In Example E, the mixing ratio of water is 50 wt%, and a surfactant and an antifoaming agent are added as additives. It can be seen that the sample according to Example E also has a good coating property and can sufficiently prevent adhesion of weld spatter.

  As described above, the weld spatter adhesion preventive agent according to the present embodiment is prepared by blending 15 to 20 wt% of grease (calcium sulfonate complex grease), 15 to 20 wt% of wax, and at least water as the balance. Can do. In this case, as in Examples B to E, additives (surfactant and antifoaming agent) can be blended together with water as the balance.

  Moreover, the ratio of the water mix | blended with a welding spatter adhesion inhibitor should just be 50-70 wt%, for example, when especially applicability | paintability etc. are considered, it turns out that it is preferable that it is around 65-70 wt%. Moreover, it is preferable to add a surfactant in order to obtain an emulsion.

On the other hand, it turns out that an antifoamer is preferable when suppressing generation | occurrence | production of a bubble at the time of application | coating of a spatter adhesion inhibitor. When a defoaming agent that is not normally used as a spatter adhesion preventive agent is mixed, no air bubbles are generated during application, and a uniform film is obtained. I was able to get a good result.
(Experimental example 1)

  Next, test data when the welding spatter adhesion preventing agent according to Example E (see Table 1) described above is applied to the periphery of the weld is shown as Experimental Example 1 in FIGS. These FIG. 1 and FIG. 2 are characteristic line graphs showing the comparison results of the weld spatter adhesion inhibitor of this example product and the conventional products (Comparative Examples 1 and 2 described later).

  In this case, an iron plate (SS400) having a length of 200 mm, a width of 250 mm, and a thickness of 10 mm was used as a base material to be welded, and the welding spatter adhesion preventing agent according to Example E was brushed on the black skin. And the bead-on-plate welding was performed to the center part of the said iron plate in the state which spatter adhesion prevention agent fully dried.

  Next, after the welding operation is completed, the surface fumes are wiped off with a waste cloth, and in this state, the number of weld spatters adhering to the application part and the outer diameter (sputter diameter) are sequentially measured as shown in FIG. The test data shown in FIG. 2 is created as a comparison result between the product of this example and Comparative Examples 1 and 2.

Here, the test data shown in FIGS. 1 and 2 use a common mixed gas (80% Ar-20% CO ₂ ) as a shielding gas for welding, and the welding wire has an outer diameter of 1.2 mm, for example. YM-28S (product classification name) manufactured by Nippon Steel & Sumikin Welding Industry Co., Ltd. is used. Further, the welding current was 290 A, the voltage was 28 V, the welding speed was 30 cm / min, and the welding operation was performed under the condition that the protruding length of the wire was set to 22 mm, for example.

  On the other hand, in Comparative Example 1, a spatter adhesion inhibitor made of a non-ionic surfactant or the like commercially available from the past (trade name “Clean Sputter 300” manufactured by Taiho Kozai Co., Ltd .: polyethylene nonylphenyl ether 4 as a component) 0.0% included) was used. And the spatter adhesion preventing agent of Comparative Example 1 (aqueous type) is set to the same conditions as the spatter adhesion preventing agent of this example product, except that the stock solution was sprayed on the black skin of the iron plate. .

  Further, in Comparative Example 2, a spatter adhesion inhibitor (trade name “Clean Sputter GW-2” manufactured by Taiho Kozai Co., Ltd .: containing isopropyl alcohol as a component) containing a commercially available organic solvent was used. And the spatter adhesion preventing agent of Comparative Example 2 (non-aqueous type) was applied to the black skin of the iron plate in the same manner as the spatter adhesion preventing agent of this example product, and was set to the same conditions as this example product. It is.

  Even in the case of Comparative Examples 1 and 2, after the welding operation is completed, the surface fumes are wiped off with a waste cloth, and the number of weld spatters adhering to the coating portion in this state, the outer diameter (sputter diameter). ) Was measured. As a result, as shown in FIG. 1, it was confirmed that a total of 16 weld spatters adhered to the spatter adhesion inhibitor of Comparative Example 1. Moreover, in the spatter adhesion inhibitor of Comparative Example 2, it was confirmed that a total of four weld spatters adhered.

  On the other hand, it was confirmed that a total of two weld spatters were adhered in the weld spatter adhesion preventive agent of the present example manufactured as described above. Then, as shown in FIG. 2, as shown in FIG. 2, there is one sputter adhesion in the range where the outer diameter (sputter diameter) of the adhering spatter is 0.5 to 1.0 mm. Only one piece was found with a size of ˜1.5 mm, and adhesion of weld spatter was almost negligible.

  On the other hand, looking at Comparative Example 1 (aqueous type spatter adhesion inhibitor), five sputter diameters of 0.5 to 1.0 mm were found, as shown in FIG. 2, and a size of 1.0 to 1.5 mm. Now it has increased to 8. Moreover, there is one spatter with a sputter diameter of 1.5 to 2.0 mm, and one spatter with a size of 2.0 to 2.5 mm. It was confirmed that it was conspicuous.

Moreover, when the comparative example 2 (non-aqueous type spatter adhesion inhibitor) is seen, one spatter adhesion with a sputter diameter of 0.5 to 1.0 mm and one spatter adhesion of 1.0 to 1.5 mm are observed. Up to three were confirmed. Therefore, it was confirmed that the spatter adhesion preventing agent of Comparative Example 2 was also more conspicuous in adhesion of weld spatter than the product of this example, and the effect of preventing the adhesion of weld spatter was most remarkable in this example product. .
(Experimental example 2)

  Next, FIG. 3 and FIG. 4 show Experimental Example 2 in the case of using carbon dioxide arc welding, and in this case as well, the welding spatter adhesion preventing agent according to Example E (see Table 1) and the conventional product (almost as in Experimental Example 1). The comparison result with the similar comparative examples 1 and 2) is shown as a graph.

In this case, carbon dioxide gas (100% CO ₂ ) is used as a shielding gas for welding, and the welding wire is, for example, YM-26 (product classification name) manufactured by Nippon Steel & Sumikin Welding Industries Co., Ltd. having an outer diameter of 1.2 mm. The test data is created by setting the same conditions as in the above-described experimental example 1 except that is used.

  That is, on the iron plate (SS400) to be welded, the welding spatter adhesion preventive agent according to Example E of Table 1 described above was brushed on the black skin, and the spatter adhesion preventive agent was sufficiently dried, As described in Experimental Example 1, bead-on-plate welding was performed at the center of the iron plate.

  Then, after the carbon dioxide arc welding is completed, the surface fumes are wiped off with a waste cloth, and in this state, the number of welding spatters adhering to the application portion and the outer diameter (sputter diameter) are sequentially measured as shown in FIG. The test data shown in FIG. 4 was created as a comparison result between the product of this example and Comparative Examples 1 and 2.

  As a result, as shown in FIG. 3, it was confirmed that a total of 21 weld spatters were adhered in the spatter adhesion inhibitor of Comparative Example 1 (aqueous type). Moreover, in the spatter adhesion inhibitor of Comparative Example 2 (non-aqueous type), it was confirmed that a total of three weld spatters adhered.

  In contrast, it was confirmed that a total of two weld spatters were adhered in the welding spatter adhesion inhibitor of the product of this example. The breakdown is as shown in FIG. 4, where one sputter adheres within a range where the outer diameter (sputter diameter) of the adhering spatter is less than 0.5, and is 1.0 to 1.5 mm. Only one was found in size, and the adhesion of weld spatter as a whole was almost negligible.

  On the other hand, looking at Comparative Example 1 (water-based weld spatter adhesion inhibitor), as shown in FIG. 2, eight sputter diameters of 0.5 to 1.0 mm were found, and 1.0 to 1.5 mm. Eight have been found in size. Moreover, there are four spatters with a sputter diameter of 1.5 to 2.0 mm, and one spatter with a size of 2.0 to 2.5 mm. It was confirmed that it was conspicuous.

  Further, in Comparative Example 2 (non-water type welding spatter adhesion inhibitor), one sputter adhesion with a sputter diameter of 0.5 to 1.0 mm, spatter adhesion of 1.0 to 1.5 mm. And one sputter deposit having a size of 2.0 to 2.5 mm was confirmed. Therefore, it was confirmed that the spatter adhesion preventing agent of Comparative Example 2 was also more conspicuous in adhesion of weld spatter than the product of this example, and the effect of preventing the adhesion of weld spatter was most remarkable in this example product. .

  In the above-described embodiment, the case of using soap containing, for example, calcium sulfonate complex as the thickener of grease has been described as an example. However, the present invention is not limited to this. For example, a soap containing a lithium complex may be used instead of the calcium sulfonate complex. Furthermore, the thickener of grease may be constituted by, for example, urea-based non-soap. Further, for example, both a soap containing a calcium sulfonate complex and a urea-based non-soap grease may be employed as a thickener.

  Further, in the present invention, it is possible to produce a spatter adhesion preventive agent (product) having a completely different performance only by changing the blending ratio of the wax and the calcium sulfonate complex grease. For example, when the blending ratio of wax and calcium sulfonate complex grease is adjusted to about 2: 1, it can be used as a spatter adhesion preventing agent with very little stickiness. On the other hand, when the blending ratio of wax and calcium sulfonate complex grease is adjusted to about 1: 2, an oil film can be formed on the surface of the steel material.

It is the characteristic view which showed and graphed the sputter | spatter number of the test data by Experimental example 1 of this invention. FIG. 6 is a characteristic diagram showing the relationship between the sputter diameter and the number of spatters of test data according to Experimental Example 1 in a graph. It is the characteristic view which showed the number of spatters of the test data by Experimental example 2 as a graph. It is the characteristic view which showed the relationship between the sputter | spatter diameter of the test data by Experimental example 2, and the sputter | spatter number by the graph.

Claims (5)

In order to prevent spatter during welding from adhering to the periphery of the welded portion, the welding spatter adhesion preventing agent used by applying around the welded portion,
A grease formed by blending a thickener with at least one base oil selected from mineral oil base oil, synthetic base oil and biodegradable base oil, and added to the grease and mixed. Including wax and water ,
The welding spatter adhesion preventing agent , wherein the grease is 15 to 20 wt%, the wax is 15 to 20 wt%, and the water is mixed as the balance . In order to prevent spatter during welding from adhering to the periphery of the welded portion, the welding spatter adhesion preventing agent used by applying around the welded portion,
A grease formed by blending a thickener with at least one base oil selected from mineral oil base oil, synthetic base oil and biodegradable base oil, and added to the grease and mixed. Including wax and water,
The welding spatter adhesion preventing agent, wherein the grease is 15 to 20 wt%, the wax is 15 to 20 wt%, and the water and the additive are blended as the balance. The weld spatter adhesion preventive agent according to claim 1 or 2 , wherein the thickener of the grease is constituted by a soap and / or a urea-based non-soap containing at least a calcium sulfonate complex or a lithium complex. The weld spatter adhesion preventive agent according to claim 1 , 2 or 3 , wherein the water is present in the form of an emulsion in the composition by high-speed stirring. The welding spatter adhesion preventing agent according to claim 2 , wherein the additive is constituted by a surfactant or an antifoaming agent.

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