SU721467A1 - Lubricating agent for hot metal rolling - Google Patents

Description

The invention relates to the field of technological lubricants for the processing of megaloids and can be used in hot pressing processes, pressure reduction, in cold iipo-roll processes and in ferrous and non-ferrous metals, as well as in metal cutting processes. In the processes of hot deformation of metals, greases based on coaxes and salt mixtures IJ, L2.J are used. Such lubricants are successfully used in the processes of hot pressing, reduction of metals, but not sufficiently (}) effective in the processes of hot rolling of profiles. Improving the effectiveness of salt lubricants is achieved by introducing solid fillers into their composition. A lubricant is known, which includes triplex 4 sodium osfate, iron oxides, d, light sawdust and salt eutectic L3j, but this composition cannot be applied) ia of the workpiece from aqueous solution. The sodium tripolyphosphate-based lubricant, soderzhetstsa hydrated lime and alkaline or alkaline earth metal halides are successfully used in hot tube rolling, but have insufficient anti-friction properties and cannot be used in hot rolling on rail mills and section mills, where the automatic rolling system is used lubricating emulsion. The closest in composition to the present invention is a grease based on sodium tripolyphosphate, water, potassium carbonate and boric acid ZD. However, this lubricant is not effective enough in the processes of hot rolling of profiles due to the absence of a liquid oil phase and low antifriction properties. The aim of the invention is to improve the anti-friction properties of the smelted screen, increase the durability of the roller tools, improve the surface quality. finished products. This goal is achieved by the fact that the lubricant based on water and sodium tripolyphosphate additionally contains the product of saponification of tar from the distillation of fatty acids isolated from soap stock of vegetable oils or technical fat; and alkali metal salts of fatty acids isolated from the oxidation product of shale concentrate. The lubricant has the following composition, wt. %: Sodium tripolyphosphate 0.2-2O Product of saponification of tar from the distillation of fatty acids isolated from soap stock of vegetable oils or technical fat, 2-2O Alkali metal salts of fatty acids extracted from the oxidation product of shale concentrate.O, 2-2O Vodado 1OO Sodium tripolyphosphate forms a stable antifriction film on the surface of the metal, consisting of insoluble phosphates. This film, on the one hand, promotes the adsorption of neutral fat on the metal surface, on the other hand; may react with fatty components to form highly thermostable organophosphorus compounds of dininea. Udrons from the distillation of fatty acids isolated from soap stock of vegetable oils or technical fat have a complex composition: up to 2% of free fatty acids, up to 5% of neutral fat, and about 30% of polymerization products of the same acids. In the process of distillation, the tars undergo temperature-temperature treatment (up to 23Q ° C), which ensures their deodorization, and thermal stability. The product of saponification of these tars both makes for the presence of a deformation in the source: the oil-liquid phase. The chemically active part of the lubricant proposed is salts of alkali metals of fatty acids isolated from the product of oxidation of shale concentrate. In the initial period of the oxidation of shale concentrate, the accumulation of high molecular weight acids occurs with the number of hydrocarbons from 24 and more. Then, the destruction of high-molecular acids with the formation of dicarboxylic acids occurs. At the same time, the possession of a high thermo-oxidative ability of succinic, glutaric acid, and also dicarboxylic acids of hydroxy-isotope, up to only 4% by weight, predominates. Salts of these acids have high lubricating properties, and high-temperature treatment during the oxidation of shale concentration provides deodorization and thermal stability of the product obtained. Salts of acids increase the emulsifying action of the saponified part of tar and provide high antifriction properties of the proposed lubricant composition. The following is a description of alkali metal salts of fatty acids isolated from the oxidation product of shale concentrate: Content of free alkali, weight. %, not more than 0.5 Content of unwashed substances, weight. %, no more Melting point, C 16 O-19 O Fatty acid titer, C 30-35 2-40 Moisture content, wt. % A lubricant is prepared by simply mixing the components at 40-9 ° C. The ratio and concentration of the components in the lubricant can vary depending on the conditions of the deformation process and the requirements for the finished product. The lubricant can be applied using a centralized feed system with precise dosing of the mixture, for example on automated presses and high-grade rolling mills, as well as immersion in a lubricant bath of a heated deforming tool (hot rolling) or a cold billet (cold drawing of black and etnyh metals). In tab. Table 1 shows examples of the composition of lubricants for various processes of hot deformation of metals. The proposed samples of lubricants GK-S, were tested in comparison with the lubricant based on 2O weight. % aqueous solution of sodium tripolyphosphate with the addition of 0.5% by weight of boric acid and 0.5% by weight of potassium carbonate, adopted as a prototype device for the study of roller materials for wear. The installation simulating the hot rolling process consists of a figurative (roll) of chromium-nickel rolls of pig iron with a diameter of 17 O mm and a sample (rolled metal) with a diameter of 23 O mm from art. 3. The tests were carried out in the following modes: Specific pressure, kg / mm. The temperature of the sample simulating the rolled metal, C The speed of cleavage, 7214 5 10 676 j The test pulses are given in Table. 2.1. As can be seen short table. 2, the proposed lubricants / HK-S (1-5) provide, in the course of hot rolling, a reduction in the wear of the roller tool and reduce the frictional forces acting on the contact zone (according to the values of the friction coefficients). Thus, the use of the proposed TC-C lubricant allows to improve the lubricant properties of the lubricants, to reduce the energy parameters of the lubricant.

Sodium tripolyphosphate

The product of saponification of tar from the distillation of fatty acids isolated from soap stock of vegetable oils or technical fat

Sodium salts of fatty acids listed in the products of the oxide formula of the invention

The lubricant for hot rolling of metals based on water, 1 and sodium tripolyphosphate, is different in that, in order to increase anti (, 2

0.2

Testing lubricants

properties of the lubricant and increased tool life, the lubricant additionally contains the product OME.; LONIUM of tars from the distillation of fatty acids, allocated to soap stock of vegetable oils or technical fat, and salt

alkali metals fatty divided from shale oxidate product, with the following KotiinoHeHTOD, weight,%:

Sodium tripolyphosphate

Product, washing of tar oils from the distillation of fatty acids isolated from soap stock of vegetable oils or technical fat Alkali metal salts of fatty acids isolated from the oxidation product of shale concentrate Water

Sources of information taken into account in the examination

1. USSR authorial supervision number 457715, class „С 10 М 7 / О4, 1975.

2 Copyright svdedetstvo USSR № 487933, cl. C 10 M 3/16, 1975.

3. USSR author's certificate

No. 499291, cl. C 10 M 7/02, 1976.

4, Copyright svdededelstvo USSR 505674, cl. C 10 M 3 / O2, 1976.

No

5. Copyright svdedetstvo USSR №454246, Clo C 1O M 7/02, 1971 (prototype).

Claims (1)

Claim A lubricant for hot rolling of metals based on water and sodium tripolyphosphate, characterized in that, in order to increase the antifriction properties of the lubricant and increase the tool life, the lubricant additionally contains the product of saponification of tars from the distillation of fatty acids extracted from co-stocks of vegetable oils or technical fat, and alkali metal salts of fatty acids isolated from the oxidation product * shale concentrate, with the following components, weight. %: Sodium Tripolyphosphate Saponification Product of Tar from Cystillation of Fatty Acids Isolated from Soapstock of Vegetable Oils or Technical Fat Alkali metal salts of fatty acids isolated from the product of the oxidation of shale concentrate Water content 0.2-20 0.2-20 0.2-20 to 10Ω