SU1008228A1 - Hydraulic abrasive composition for machining metal workpieces - Google Patents

Abstract

HYDROABRASIVE COMPOSITION FOR METAL PREPARATIONS, containing an aqueous alkali solution and an abrasive, are distinguished. By the fact that, in order to reduce its cost while retaining its technological properties, it contains slag from the converter production of the oxidative period of metal smelting, a finely cellular structure with inclusions of free lime in the amount of 20-25% by weight of slag in the following ratio of components, Bec .% s abrasive. 30-40 An aqueous solution of alkali 09 (pH 8-10) 60-70

Description

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00 The invention relates to the metalworking industry and is intended for the treatment of metal products with hydroabrasive compositions having an alkaline environment under the conditions of enterprises not specialized in this industry. . Known abrasive compositions, including mineral aggregates, diamond, boron carbide, alumina (electrocorundum) and quartz sand M and 2. However, the manufacture of well-known components in the conditions of metallurgical enterprises that do not have specialized equipment and necessary components, often scarce, is associated with certain difficulties. In addition, the centralized provision of enterprises with such components or ready-made abrasive masses is performed non-rhythmically, which leads to unproductive losses, and the production of abrasive compositions under the conditions of specialized enterprises does not always correspond to the increasing needs of the metal-working industry and is associated with significant human resource and material resources. The closest to the proposed technical essence and the achieved effect is a hydroabrasive composition for processing metal blanks, containing an aqueous solution of alkali and abrasive, Sz. The disadvantage of this composition is the limited technological possibilities, as it provides only the final (cleaning) finishing of parts after their pre-treatment with a hydroabrasive composition. Making a composition based on traditionally known components leads to the disadvantages described above. In addition to this, when processing parts with this composition, the necessary concentration of the alkaline medium is maintained by —frequent changes of the solution or continuous rinsing, which complicates the processing technology. The purpose of the invention is to reduce the cost of hydroabrasive composition while maintaining technological properties. The goal is achieved by the fact that a hydroabrasive composition for processing metal blanks containing an aqueous alkali solution and an abrasive contains, as an abrasive, slag from the converter production of the oxidative period of smelting metal with a fine cellular structure with inclusions of free lime in the amount of 20-25% by weight of slag at the following the ratio of components, wt.%; . Abrasive 30-40 alkaline aqueous solution,. (pH 8-10) 60-70 As an abrasive material, for example, pshakovy waste of steel production (open-hearth or converter slag of the oxidative period of smelting metal, welding slag) can be used. The use of slag waste as an abrasive component simplifies the technology for the preparation of a hydroabrasive composition, since the slag needs of each metallurgical plant can be fully satisfied with its own resources. In addition, the formation of a finely porous cell structure in the slag with inclusions of free lime is provided not by special technology and equipment, but by indirect physicochemical processes that occur during the melting of the metal in the metallurgical aggregates and the slag crystallization in the dumps in the open air. The limited content of free lime in the slag (20-25%) is also achieved by the mode of metal smelting and is due to ensuring the necessary strength characteristics of the abrasive (hardness, strength, wear resistance, etc.), as well as maintaining the desired concentration of alkaline environment due to leaching of lime from the slag abrasive water An increase in the percentage of inclusions of lime in the slag abrasive (more than 25%) violates the integrity of its structure and thereby reduces its strength. A reduced content of lime inclusions (less than 20%) weakens the concentration of the alkaline solution and impairs the properties of the hydroabrasive composition. The established ratio of components (slag abrasive is 35 wt.% And liquid alkaline medium 65 wt.%) In the hydroabrasive composition provides the best performance when processing blanks. Reducing the cost of waterjet composition is achieved due to the low cost of pshakovogo abrasive and reducing labor costs to obtain it. The ratio of co / mono in hydroabrasive compositions and the content of lime inclusions in the slag are given in table 1.

Table 1

Converter slag, taken from dumps, is used as an abrasive component. Tests of the proposed composition are carried out in comparison with the known, in which the basis of the hydroabrasive mixture is electrocorundum. In all cases, the liquid medium has an alkaline reaction, and in a known composition the concentration of the alkaline solution is needed (pH 8-10) is maintained by portoHydroabrasives. From table 2 it follows that the offer provides an efficient treatment.

Our hydroabrasive composition in comparison with metal blanks for horses with a well-known along with a low durability period, time, moreover, 651 complex of properties has its best quality and simplicity of its washing, and in the expected thanks to the gradual leaching of inclusions of free lime with water

pieces of slag abrasive. The tests are carried out after treatment with hydro-abrasive composition of each batch of parts in the amount of 1000 pieces.

Table 2 shows the dualities of the proposed and known hydroabrasive compositions. ,

Table 2

Monitored Parameters

S1008228

Tav 2, which is taken as the optimum. Its self-sharpening. Periodic Presence of finely porous cellular analysis of alkaline medium shows in the slag abrasive, and also has the necessary ability of spontaneous sub-concentration (pH 8-10), which self-sustaining the desired concentration stretches out of the alkaline environment and decreases the extent of the alkaline environment. the processing cycle due to the aggravation and salting of the cutting blood of water with the incorporation of limestone slag fragments in comparison with the electrolyte contained in the slag abrasive, trokorundom. As a result eliminates the needs of the processing items pre-bridge in frequent changes of the solution or

lagging gibroabrasive composition for its continuous washing, which simplifies the abrasion of external cuttings to cover the processing technology, reduces

wet slag abrasive exposes lime consumption and eliminates the presence of

internal new edges, i.e. closed-circuit water pipelines.

Claims (1)

HYDROABRASIVE COMPOSITION FOR THE PROCESSING OF METAL PREPARATIONS, containing an aqueous solution of alkali and an abrasive, characterized in that, in order to reduce its cost while maintaining technological properties, it contains slag from the converter production of the oxidative period of metal smelting, finely porous cellular structure with free lime inclusions the amount of 20-25% by weight of slag in the following ratio of components, abrasive Aqueous alkali solution (pH 8-10)%: 8228 ty in an amount of 20-25% by weight