SU996431A1 - Lubricant for cold metal press=working - Google Patents

Description

This invention relates to process lubricants for cold forming of metals.

Known lubricants based on vegetable oils and fats, such as palm oil, etc. tl3

However, vegetable oils and fats are a scarce and expensive CET. In addition, when used as a technological lubricant for the cold treatment of metals by pressure, the treated surface is matte and the draw ratio is not high enough.

A known lubricant consisting of sulfated castor oil (gyrosarine oil) is 15-20 wt.%. Xyrate soda or trisodium phosphate 0.2 wt.%, Water | the rest is C2.

However, gyrosarin oil is a refractory product, and when used as a process lubricant for metal forming, the surface to be treated becomes highly opaque.

The aim of the invention is the development of a lubricant for the cold working of a metal with pressure by pressure, allowing to replace expensive vegetable

oil waste timber production and ensuring high. H1 azric properties.

This goal is achieved by using an aqueous emulsion of sulphated tall oil pitch soaps - as a lubricant for cold pressure working of metals. .

Tall Peck (high pot

The 10th fraction is obtained from the rectification of tall oil and is a mixture of neutral substances (difficult high molecular weight alcohols, steroids) 65-75%, resin acids

15 10-14%, fatty (unsaturated) acids 8-12%, oxidized products the rest.

A known method for producing C31 sulfated tall oil soaps.

This product can be used.

20 as a surfactant and as a component of the antistatic solution C4.

The composition of tall oil, from which by distillation get pitch,

25 depends on the climatic conditions of the growing tree, on the sulphate method of boiling wood and many other factors.

One of the main methods of treating tall oil is its

rectification. In the rectification of tall oil, in addition to the main products - tall oil rosin and fatty acids, the tall oil pitch is produced from the distillation of tall oil.

There are two main types of tall oil distillation — a distillation with a gradual increase: heating temperatures, where the main products are obtained in the following sequence: fatty acids from the first distillation column, resin acids from the second, and peck from the third to the end of distillation. The second type of rectification is rectification with a gradual decrease in temperature, where the main products are obtained in the following sequence: from the distillation bath - pitch, from T columns - resin acids, from II - distilled tall oil, from III - fatty acids. The group composition and properties of the pitch of various pulp and paper mills (PPM), from which sulfated pitch can be obtained by the developed method, are presented in Table 1.

Below are the main characteristics of sulfated pitch, which to monitor its purity of production: Number of saponification, mg KOH / G10-40

Average molecular weight 300-360

I Bratsky I

Indicators

Acid number, md KOH / H

30-36

Melting point, s

50-70 Amount of organically bound

50 wt.%

6-14 10-30 Iodine number of pH of 10% aqueous solution 8-10 Study of a number of physico-chemical properties of soaps of sulfated tall oil pitch and especially testing and evaluation of their lubricating properties (determination of the stretch ratio, force, drag, quality of the metal after pressure treatments) show their high efficiency as a process, dMasKH.

Table 2 shows the results of cold rolling on a laboratory mill of samples of steel grade 8 KP ..

The results of the drawing of copper bars are given in Table 3.

Using an 8% aqueous emulsion of sulfated tall oil soaps gives a much better surface finish. Thus, in cold rolling only on the proposed lubricant, it is possible to avoid haze, ringing. In addition, the proposed lubricant shows significantly better lubricating properties: a higher draw ratio, a lower value of the drag force.

Table

Kotlas Solombala

26-30

26-30

Vaseline

80 butter

Table 2.

2.4

Matova

:: r.: i

Saponified fatty, taplovogr acid oils (12% emulsion is the optimal concentration).

Castor oil

Alizarin

oil 18% soda

0.15% water

up to 100%

Sodium Sulfate Sulfated Tall Pitch Soap (8% Aqueous Emulsion)

Potassium sulphate tall oil pitch (10% aqueous emulsion)

Lithium No. llo

sulfated pitch (b%

water emulsion

Castor-May-1550

18 wt.% Alizarinog

oils, 0.15% soda,

the rest is water

Sodium slate sulfated test pitch (8% aqueous emulsion)

Potassium sulphated soap of the pharyngeal pitch (10% water emulsion)

Lithium sulphated soap talBOBOjo pitch (6% aqueous emulsion)

The continuation of the table.2.

-H

I.

Tliii

four

2.5

Matova

3.8

Matova

6.2

Very dull

800

1®, 0

Brilliant schA

9.9

790

Brilliant schA

10.0 Brilliant schA

800

aa ringing shyaruzheva

{C SHE CROWN

Ringing detected

Smooth clean to the surface

Ryadka is pure all surface

Smooth clean to the surface

Claims (4)

1. Grudev A.P., Tilik V.T. Technological lubrication of the rolling mill. M. . Metallurgists 1975, p. 103-140. 2. Osher R.N. Production and use of coolant fluids .. M., Gostoptehiddat, 1968, p.53. 3. USSR author's certificate on d 2959625/04, CL C 07 C 139/00, 1980. 4. USSR author's certificate on application 2911211/26, CL From 09 to 3/16, 1980.