SU771148A1 - Grease for cold pressure-working of metals - Google Patents

Description

The invention relates to the field of lubricants for cold metal forming and can be used in various areas of the manufacturing industry in the manufacture of parts made of aluminum alloys by the methods of stamping, rolling, drawing, etc. B-currently widely used various technological lubricants for pressure treatment of metals mainly on the basis of oil and water with the introduction of various additives 1. For example, water-based lubricants containing alkali metal nitrite and N-carboxymethylalkenylsuccinimide {.2}, the product of the interaction of alkali metal phosphates with N-carboxymethylalkenyl succinic acid, are known. The most similar in composition to that claimed is cold lubricant metal working which is polyhydric alcohols or their mixture 4. Thus, it is recommended to use glycerin or its mixture with ethylene glycol as lubricants. However, the use of known lubricants does not provide the required quality. surface to be treated. The aim of the invention is to improve the quality of the processed surface of products made of aluminum alloys. In order to achieve this goal, a lubricant for cold processing of polystyrene based pressure minerals is proposed, which additionally contains an amorphous boron composition by weight: Amorphous boron 5-50 Polyhydric alcohol 50-95 Glycerol, ethylene glycol, propylene glycol, proxanol, can be used as polyhydric alcohol that the presence of boron in the oxide film leads to a significant increase in the corrosion resistance of aluminum and its alloys even in aggressive environments (nitric acid). At the same time, the dispersion medium in which boron is found during pressure treatment is of great importance. The presence of oil, water, and surfactants dramatically reduces the corrosion resistance of the lefts. Many were found to be a suitable medium: atomic alcohols (glycerin, propylene glycol, ethylene glycol, etc.) as well as proxanol, the copolymerization product of ethylene oxides, propylene, and other olefins, which can also be regarded as a polyhydric alcohol, since a large number of groups are formed HE. When using compositions containing these substances and amorphous boron, the corrosion resistance of wired aluminum y-aluminum and its alloys increases significantly compared with control samples treated without boron.

The addition of polymorphic alcohols of amorphous boron leads to the complete disappearance of hedir and allows semi-; The surface is of fairly high quality.

Table 1 shows the formulations for lubricants tested.

Grease formulations

when drawing samples with a diameter of 11.3 mm through a spinneret of VK alloy with a diameter of 10.9 mm. The surface quality of the wire specimens was determined using a type 201 profilograph. Corrosion resistance was measured by an electrochemical method by measuring the potentials of the passive area in volts relative to the silver-chloride electrode in nitric acid medium using the PAY 173 / 1.79 potentiostat

The data of the test results greases 1-12 compared with the known are given in table 2-5.

The proposed lubricant composition, as

f showed the test results presented in Tables 2–5, which significantly increases the corrosion resistance of products, as well as improves the cleanliness class of the treated surface.

Table 1

Propylene glycol

Ethylene glycol

Proxanol Testing of glycerin based lubricants

D16T

310010. -0.3 - S, 5

245010-0.3- + 0.5

Aoo

300010 -0.3- + 0.5

D16AMO

31509 (Seek) -0.5- + 0.1

d 16 t

26509 (Seek) -0.5- + 0.1 AOO

31009 () -0.5- + 0.1 D16AMO

95 80 50

95 75 50

95 70 50

Table 2 Test of lubricants based on propylene glycol

Test of lubricants based on the test results of proxenanol based lubricants

Table 3

Table 4. - ethylene glygol

Table 5

-0.35 - +0.65 -0.35 - +0.65 -0.35 - +0.65 -0.5 - +0.1 7 77 D The formula of the invention h Lubricant for cold metal working on the basis of alcohol polyatom, characterized in that, in order to improve the quality of the surface being treated, the lubricant additionally contains amorphous boron in an amount of 5-50 wt.%. Sources of information taken into account in the examination 1. A.P. Grudev, V.T.Tilik. Technological lubricants in rolling production 1488, M., Metallurgi, 1975, p. 275 p n. 3278427, 252-25, publishedLebbb. 5 Awning US 3296127, 252-25, published .1967. 4. Mechanical properties of materials under high pressure. Edited by Kh.L.Pyu, issue 2, M., Mir, 1973, pp.44-45, 70-71 (prototype).

Claims (1)

Formula inventions h Lubricant for cold treatment of metals with a polyatomic alcohol based press, characterized in that, in order to improve the quality of the surface being treated, the lubricant additionally contains amorphous boron in an amount of 5-50 wt.%.