Aqueous one step type lubricanting agent for efficient cold forging

Abstract

A new aqueous lubricant of one process type used for high efficient cold forging of metallic materials is disclosed. The aqueous lubricant produces less industrial waste than conventional process, requires simple processing steps and provides improved lubricative performance. The aqueous lubricant of the invention is comprising (A) a water soluble inorganic salt, (B) wax and (C) a metal salt of a fatty acid, those are dissolved or dispersed in water, and the ratio of (B) / (A) is 0.60~0.70 and the ratio of (C) / (A) is 0.1~0.3. The water soluble inorganic salt may be a sulfates, silicates, borates, molybdates and tungstates. The wax may be a synthetic wax of which melting point is in a range of 70~150° C. The metal salt of a fatty acid may be a product prepared by reacting of C12~C26 saturated fatty acids with metal selected from zinc, calcium, barium, aluminum magnesium and lithium.

Description

[0001] In recent years, important parts for transportation machineries are often manufactured by applying cold forging of more than 70% of reduction area at one stroke to a steel of having the tensile strength of more than 300 N / mm.sup.2. This cold forging process is usually called as "high efficient cold forging". The present invention is related to a process to form a lubricative coating layer having excellent performance as lubricant onto the surface of a metallic material to be subjected to the high efficient cold forging without any previous chemical treatment. The present invention is related also to an aqueous lubricant of one process type used for high efficient cold forging, which facilitates to simplify the conventional lubricant layer forming processes, that is, to minimize space area required for forming the lubricative coating layer and not to increase industrial waste products.PRIOR ART[0002] Generally, in cold forging of metallic material, such as steel and stainless ...

AI Technical Summary

Benefits of technology

[0143] As described above, the aqueous lubricant of the present invention enables to form a coating layer having high performance to the surface of metallic materials. And less number of treatment steps and less plant area necessary for coating process are required in the present invention. In addition, aqueous lubricant of the present invention produces less industrial waste and is preferable for global environmental protection.

[0144] Further, the process of the present invention enables to improve the process by saving the treatment time of coating, by increasing the efficiency of coating, by saving the energy and by saving the production cost.

Problems solved by technology

These insoluble matter are called as sludge, which is troublesome since it is required to be regularly excluded from the solution.

Recently, it is a big issue to reduce waste products from the industries for global environmental protection, and industrial waste containing phosphate compounds has been considered as serious problem in view of environmental protection.

Further, in the conventional process that produces a phosphate layer and uses a reactive soap on the phosphate layer, simplification and improvement of the process is required, since it requires wide area for the processing plant, greater time and complex control of the process.

However, no composition which has the same effect as the conventional process of using a chemical layer and a reactive soap has been obtained.

However, the lubricant according to this prior art is too unstable to use in an industrial scale since it contains emulsified oil component, and it is not steady to show a high lubricative properties in high efficient cold forging.

However, this composition is also not steady to show a high lubricative properties in high efficient cold forging.

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