JPS61209793A - Binder for flux - Google Patents

Abstract

PURPOSE:To obtain a coated rod having excellent paintability and sintered surface in a stage of coating a coated electrode by using a binder for a flux prepd. by compounding a prescribed ratio of a bleeding resistant agent with a water-soluble high-polymer compd. CONSTITUTION:The binder for the flux prepd. by compounding 1-5wt% bleeding resistant agent with the water-soluble high-polymer compd. is used. The above-mentioned high-polymer compd. is selected from carboxylmethyl cellulose, hydroxyethyl cellulose, methyl cellulose, carboxymethyl hydroxyethyl cellulose, hydroxypropyl cellulose and polyacrylamide. A water soluble polyvalent metallic salt is used for the bleeding resistant agent. The production of the coated electrode having the excellent paintability and good sintered surface is thus made possible.

Description

Detailed Description of the Invention [Industrial Application Field] In the production of coated arc welding rods, the present invention involves kneading flux as a coating material with water glass as a binder, and then mixing the mixed material with mild steel or The present invention relates to a flux fixing agent that improves coating properties in the process of coating other alloy core wires, thereby making it possible to obtain a good coated arc welding rod.

[Prior art and problems] In general, coated arc welding rods are made by adding a water glass solution that functions as a binder to a flux made of various ore powders, metal powders, and alloy powders that function as welding solvents. It is obtained by applying the resulting coating to a mild steel or other alloy core wire and then drying it at a suitable temperature of about 100 to 500°C.

A manufacturing method using alginate as a flux fixing agent for this coated arc welding rod is disclosed in Japanese Patent Application Laid-Open No. 52-117845.
It is described in. However, since alginate is a natural product, its quality varies significantly depending on the production area and year, and its properties are unstable. Furthermore, it has the drawbacks of being expensive and subject to rapid price fluctuations.

[Means for Solving the Problems] As a result of intensive studies to improve these problems, the inventor of the present invention found that the amount of anti-pleasing agent for water-soluble polymers is 1 to 5.
The present invention was developed based on the discovery that a coated arc welding rod with excellent paintability and good workability can be manufactured by using a flux fixing agent characterized by containing % heavy weight in the coating process of the coated arc welding rod. It was completed.

That is, the present invention provides a water-soluble polyvalent metal for a water-soluble polymer compound consisting of one or a mixture of two or more selected from carboxymethylcellulose, hydroxyethylcellulose, methylcellulose, carboxymethylhydroxyethylcellulose, hydroxypropylcellulose, and polyacrylamide. 1 anti-pleasing agent consisting of salt
It is characterized in that it is blended in an amount of ~5% by weight.

Furthermore, carboxymethyl cellulose (hereinafter abbreviated as CMC) is commercially available CMC (degree of etherification = 0.5 to 0.
It has been found that CMC having a higher degree of etherification than CMC 9) has excellent coating properties. In addition, water-soluble polyvalent metal salts used in the present invention include aluminum acetate (soluble or basic), aluminum sulfate, potassium alum, aluminum salts such as aluminum chloride, ferrous chloride, ferric chloride, Iron salts such as ferric sulfate, cupric salts such as cupric chloride and cupric sulfate, other inorganic or organic magnesium salts, cadmium salts, chromates, titanates, antimonates, etc. species or mixtures of two or more species.

That is, by using the fixing agent for flux according to the present invention, the extrusion pressure in the coating process is low and good extrusion work is possible. Furthermore, the coated arc welding rod is less sticky before drying, and troubles due to fusion do not occur.

[Examples and Comparative Examples] Hereinafter, the present invention will be explained in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples. Note that parts and percentages in the examples are parts by weight and 1% by weight.

A flux and a fixing agent for flux having the component composition shown in Table 1 were put into a wetting machine and kneaded for 3 minutes, and then an aqueous water glass solution was added and kneaded for 8 minutes. The mixture was applied to a mild steel core wire using an extruder, and then sintered at 300°C.

Table 2 shows the results of evaluating the paintability and the texture of baked crystals by changing the formulation of the flux surrounding adhesive.

-Table 1 [Operations and Effects] As detailed above, according to the present invention, a coated arc welding rod with excellent paintability in the welding rod manufacturing process, less stickiness on the surface, and good baked crystal skin was produced. .

Claims (4)

[Claims] (1) A fixing agent for flux characterized by blending 1 to 5% by weight of an anti-breathing agent with respect to a water-soluble polymer compound. (2) The water-soluble polymer compound is carboxymethyl cellulose, hydroxyethyl cellulose, methyl cellulose,
The fixing agent for flux according to claim 1, comprising one or a mixture of two or more selected from carboxymethyl hydroxyethyl cellulose, hydroxypropyl cellulose, and polyacrylamide. (3) The fixing agent for flux according to claim 1, wherein the anti-breathing agent is a water-soluble polyvalent metal salt. (4) The degree of etherification of carboxymethyl cellulose is 1.
The fixing agent for flux according to claim 2, which is 0 or more.