RU2522351C1 - Polishing paste - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: polishing paste contains the following, wt %: abrasive micropowder based on aluminium hydroxide and iron oxide - 65, paraffin - 15, stearine - 10, oleic acid - 5, and liquid synthetic soap is the rest.

EFFECT: excluding toxic chrome oxide from composition of polishing paste with simultaneous increase of its polishing capacity and with minimisation of roughness of the processed surface.

2 tbl, 5 ex

Description

The invention relates to the machining of parts of non-ferrous, stainless and hard alloys.

Known polishing paste (see patent RU No. 2034888, class C09G 1/02, publ. 1995), containing, wt.%: White aluminum oxide - 22-26, chromium oxide - 18-22, stearin - 46-50 and OP-7 or OP-10 - the rest.

However, this polishing paste has a low polishing ability (the roughness of the treated surface is Ra - 0.15-025 microns.), While it contains toxic chromium oxide, which worsens the environmental situation at the facility and working conditions.

The closest in technical essence and composition is polishing paste (see patent RU No. 2112000, class C09G 1/02, publ. 1998), which contains, wt.%: Calcined sludge from galvanic production with a content of chromium oxide 76- 96 wt.% - 50-64, stearin 10-12, paraffin 20.5-22.5, oleic acid 3-7, kerosene - the rest.

However, the waste of galvanic production contains a high amount of toxic chromium oxide 76-96 wt.%, Which worsens the environmental situation at the facility and working conditions, but the paste has a fairly high polishing ability (Ra - 0.04-0.10 microns.)

The technical result from the use of the invention is to improve the environmental situation at the facility and working conditions by completely eliminating toxic chromium oxide from the composition of the paste while increasing its polishing ability, while minimizing the surface roughness to Ra 0.02-0.04 microns.

The technical result from the use of the invention is achieved due to the fact that the paste for polishing parts made of non-ferrous, stainless and hard alloys includes abrasive material, paraffin, stearin, oleic acid, and an abrasive micropowder based on aluminum hydroxide and iron oxide is used as an abrasive material, and it further comprises a liquid synthetic soap in the following ratio of components, wt.%:

abrasive micropowder based on aluminum hydroxide and iron oxide 65 paraffin fifteen stearin 10 oleic acid 5 liquid synthetic soap rest

It should be noted that a liquid synthetic soap based on sodium lauryl sulfate (on an alkaline basis) is introduced into the composition together with fatty components and oleic acid with the addition of environmentally friendly abrasive micropowder based on aluminum hydroxide and iron oxide and is poured in hot forms at a temperature of 60 ° C, which improves the rheological properties of the binder and increases the polishing ability of the polishing paste with ensuring the roughness of the treated surface (Ra - 0.02-0.04 microns.). Moreover, the above abrasive micropowder based on aluminum oxide and iron oxide is taken ready-made, made according to the technology protected by patent RU No. 2109026, class. C09G 1/02, publ. 1998, and used for machining parts of non-ferrous, stainless and hard alloys.

All mass ratios of the components of the polishing paste were determined experimentally and selected optimal to increase the polishing ability of the paste (with Ra = 0.02-0.04 μm.). If we take the mass ratios of the components more or less beyond the limits, then this adversely affects the polishing ability of the paste.

The technical essence of the invention is illustrated by examples of specific performance.

Example 1 (optimal variant)

Take the calculated amount in wt.% Of all components of the paste. A mixture of paraffin (15) and stearin (10) is loaded into a reactor preheated to 80 ° C and brought to a complete liquefaction. Then this mixture is fed into a mixer equipped with a mechanical stirrer, and oleic acid (5) and liquid synthetic soap (5) are added according to TU 9392-023-1291034-2006. With constant stirring, an abrasive micropowder based on aluminum hydroxide and iron oxide is gradually introduced (65), the mixture is brought to complete homogenization, cooled to a temperature of 60 ° C and poured into molds. Experimentally, parts were machined sequentially from non-ferrous alloy, stainless alloy and hard alloy on a polishing machine with optimal component ratios, at which the surface roughness Ra 0.02 μm was achieved.

Examples 2-5, similarly to example 1, were carried out on the transcendental values of the mass ratios of the components of the polishing paste.

Below are the compositions of polishing pastes in table 1, and table 2 presents examples 1-5 with the provision of the treated surface Ra.

Thus, when using the proposed technical solution, an improvement in the environmental situation at the facility is achieved and the polishing ability of the paste is increased (up to Ra 0.02-0.04 μm.).

Table 1 Composition of pastes The content of components, wt.% Abrasive Stearin Paraffin Oleic Liquid Synthetic micropowder acid Tic soap according to TU 9392-023- 1291034-2006 one 65 10 fifteen 5 5 2 68 10 fifteen 5 2 3 60 10 fifteen 5 10 four 70 9 fourteen 5 2 5 63 9 fourteen 6 8

table 2 Indicators Prototype The proposed paste composition one 2 3 four 5 Roughness processed surface 0.04-0.10 0.02 0.04 0.10 0.04 0.09 Ra μm

Claims (1)

A paste for polishing parts made of non-ferrous, stainless and hard alloys, including abrasive material, paraffin, stearin, oleic acid, characterized in that it additionally contains liquid synthetic soap, and an abrasive micropowder based on aluminum hydroxide and iron oxide is used as an abrasive material, the following ratio of components, wt.%:
abrasive micropowder based on aluminum hydroxide and iron oxide 65 paraffin fifteen stearin 10 oleic acid 5 liquid synthetic soap rest