DE1594457A1 - Process for rolling metals - Google Patents

Description

PATENT LAWYERS

DR.-INC ₇ . H. FlNCKE
DIPL.-IN 3 H. DRILL

DIPL-ING. S. STAEGER "3rd May / 1966

MUNICH 5 ^0O

MOLLERSTR.31 λ CQ 4 ^ 5 7

Description no. J20

to the patent application

of the company IMPERIAL CHEMICAL INDUSTRIES LIMITED, London, S.W.1 /

England

concerning
BEHAVIOR TO ROLLING HALLS

PRIORITY; 3 «, May 1965 and

Apr. 21, 1966 - GREAT SITANIA

The invention relates in particular to a method for "orphans of metals" a process in which resin lubricants are added to the metals before the orphan

It is known that various metals use resins for one purpose Lubrication during cold forming processes. QeaMss British Patent 872,581, for example, is one method for deformation of sheet metal by pressing or milling after coating known with a resin coating, which is based on a copolymer an akrylißchen or rsethakryliechea seter with one smaller proportion of an unsaturated acid, for example «ethakrylieohor Acid, is composed. Such acids can be very a solution in an organic soldering agent, for example -

BAD ORIGINAL 009886/1698 ^{# / #} j

wise trichlorethylene, are used. It can be used in Combination with other resins, resin-forming substances or in connection with other additives, for example a chlorinated paraffin according to British patent specification 1 001 855.

It has now been found * that the resin lubricants, which during cold deformationB processes are appropriate «also in some cases with Success in cold rolling metals are applicable. The conditions of cold rolling, although in different relation to cold working processes, are For example, pressing processes, comparable, must be complied with much more precisely and place higher demands on the properties of the resin. Rolling mills also have to work under an influx of oils or water-based coolants.

According to the invention there is an improved method for cold rolling of a metal created, the cold rolling process being applied to a Netall applied with a surface coating made of a thermoplastic resin will.

The thermoplastic resins which are used in the inventive Procedures are determined, include in particular bars "geaäss British Patent 8-2,581, namely copolymers of a acrylic or aethacrylic ester with a smaller proportion • Iner carboxylic acid with an ethylenically unsaturated one Compound (e.g. copolymers of n-butyl methacrylate smaller proportions of methyl methacrylate and aethakryliecher acid). These resins could ι in conjunction with an organic, in one

009 886/169 8

BATHROOM ri

Solvent-soluble, alkylated, hot-baked condensation product of formaldehyde with urea or melamine can be used » Other resins such as polyvinyl acetate and copolymers of Poly vinyl acetate and vinyl chloride can also be used.

The thermoplastic resins may be used alone or in conjunction old a variety of additives, for example, with smaller amounts of silicones, stearates, or other Joralösungszusätzen which the tendency of the resin layer sun sticking to the rolls or to ^' "prevent placing wherein Walsvorgang d i. Resins can also be used in conjunction with additional lubricants, for example chlorinated baraffins or chlorinated paraffin waxes (in particular by incorporating a lubricant into the resin compound added to the metal according to British patent specification 1 001 855 or with conventional lubricants also mineral lubricants, for example graphite or animal or vegetable oils , for example bobben or palm oil, can be used _;

The resins can best suit the metal. as a solution in one organic solvents, especially in a brined one Hydrocarbon solvents such as trichlorethylene, may be added as shown in British Patents 875,581 and 1,001,855. The application of the resins can be expedient done by immersing the metal in the resin solution.

About the adhesion of the coating to the metal and the possibility to reduce the sticking of the resin to the rollers,

0 0 9 8 8 6/1698. ./.

BAD ORIGINS

the solvent in the coating should be removed by evaporation before actually rolling.

The method according to the invention can be applied to any metals which can be cold rolled «including titanium, Titanium alloys, aluminum, aluminum alloys, bronze, copper, Steel alloys, including stainless steel, as well as the under alloy known under the trademark "Nimonic". The rolling process can be carried out at any convenient temperature up to the decomposition point of the resin. Bas procedure is special useful for rolling metals that damage the rollers and are absorbed by them (e.g. titanium and tantalum) as well as in all those cases in which extreme pressures are exerted.

The resin compounds can be applied immediately before the rolling process will. In this case, the device for coating the metal can expediently in close connection with the rolling mill or be built united with this. Optionally, the resin can be added at an earlier stage of manufacture so that the Capability of the resin layer used to protect the metal surface for example to prevent corrosion or damage from scratches during treatment.

The choice of the particular Harzea to be used can be, for example of the metal to be coated, of the particular rolling device used and the special features of the whale process themselves depend, for example, on which media are used as coolants for the rollers.

009886/1698

BATH ORIGINAL

The advantages of the method according to the invention are that: by using the resins explained, metal (which for example the shape of sheet metal, billets, strips, plates, rods or drilling) bit greater reduction in thickness than with Usual lubricants can be rolled. Be Avon Difficulties as a result of refusal to practice training greatly reduced. In the" Metal remaining after the orphan can serve as a lubricant for subsequent whaling processes, in this way No need for hay-laying bars. When the whale process is over, the rolled metal can be borrowed to a ·· Solvent cleaning methods are cleaned, for example by using trichlorethylene as a solvent. Optional can be those based on acrylates ■ or methacrylates susammeaierten Harse with no residue during a subsequent one Starting process, preferably in an inert atmosphere, to be volatilized.

1st example

Coated strip 130 made of titanium of 25 se width and 1.25 m in thickness were rolled it Working orphan 15 ca diameter at a Walsengeachwindigkeit of 7 ■ per minute in a "four-roll stand." The coatings used and the ersielte Bedusierung ale result of, thinning are shown in the following Table 1. "In any case, the metal has been performed k aal without recoating through the rolling mill.

According to the Auewaleon, the resin-coated strips were in one

009886/1698 " ^A.

BAD ORfGlNAt

Trichlorethylene degreasing bath treated. This treatment ent * removed all of the coating compound and gave a clean one Metal surface free of whale marks and scratches.

For purposes of comparison, the results are also given below for a similar strips put together, which old a ·· usual Lubricant (Coating C) was rolled.

Coating
tion By
run
No. Entrance
thickness
[mm] Auegangs
thickness
[mn] load
(t) fieduktioD
^ppo läff ^oll ~
W. reduction
sown
M- A. A1
A2
A3
A4 1.22
. 1.02
0.89
0.77 1.02
O.89
0.77
0.66 20.0
24.0
25.O
28.4 15. *
13.6
12.8
14.8 15.6
27.1
36.5
45.9 B. B1
B2
B3
B4 1.22
1.02
0.89
0.77 1.02
O.89
0.77
0.64 19.8
22.5
23.2
27.4 16.0
14.8
11.6
17.Ö 16.0
28.5
36.8,
47.6 C. C1
C2
C3
C4 1.22
1.06
0.94
0.82 1.06
O.94
0.82
O.74 20.9
27.O
27.4
33.2 12.8
12.5
12.2
10.8 12.a
23.8
33.0
40.2

Coating A was produced by coating the metal using the following compound: trichlorethylene release bit 15% of a mixture of (i) 87 % of a copolymer derived from 98% 2-ithoxy-methyl methacrylate and 2 % methacrylic acid, and (2) 13 % of a chlorinated paraffin with about 50 % chlorin

Coating B was obtained by applying the following compound

009886/1698

BAD ORIQiNAt

the metal produced: Trichlorethylene solution ait 15 % «Ines mixture of (1) 60 # of a copolymer, which was derived τοη 98 % 2-ethoxy-Äthylnethakrylat and 2 % methacrylic acid, and (2) * fO % of a chlorinated paraffin waohsee old 21 % chlorin.

In each case the trichlorethylene was oozed from the coating Evaporation removed before the whale process was performed.

Coating C was mineral oil with an SAE viscosity of 50.

2nd example

A sheet of titanium 16O measuring 120 χ 60 x 5 "10 ** ca was coated with the Harzboschichtung B of the first examples in which a coating thickness of about 2» 5 * 10 * ^"? Aa per page ^ revealed. The sheet was then rolled in a four- frame rolling mill for orphans with a diameter of 50 cm at a rolling speed of about 50 a per minute. A similar sheet without a coating, a with the resin described above, was waisted using a mineral oil with an S AE viscosity of 50 as a whale shaving agent Each sheet was passed through the rolling mill 5 times, using a rolling load of about 2-0 tons. The thickness of the ait dea resin-coated sheet was reduced by 0.03 µm, the uncoated sheet by 0.018 µm Uncoated sheet metal was brought through in another rolling mill 10, the thickness being reduced by a further 10 ** min

- 009886/169 8
BATH ORIGINAL

Use of a conventional whale lubricating oil results in a reduction Application of the method according to the invention in less than 5 times " run scored.

009886/1698
BATH ORIGINAL

Claims (8)

Claims. 1. for cold rolling a ·· metal ·, gekeoaseiwithout through previous coating of the metal surface using a wrinkle resin. 2. The method according to claim 1, characterized in that there is ThernoplastharE a Kopolyaer a · acryl or aethakryliaohe « Esters with a smaller proportion of a carboxylic acid «ai, t an ethylenic unsaturated affiliation. ■ 3. The method according to claim 2, characterized in that the thermoplastic resin is a copolymer of 2-thoxyethylaethacrylate a smaller proportion of acrylic acid let k. Process according to one of Claims 1 to 3, characterized in that the thermoplastic resin is used in conjunction with a chlorinated paraffin or paraffin wax. 5. The method according to any one of claims 1-4, characterized in that that the thernoplastic resin ohloriniert the metal as a solution in a Coal hydrogen solvent is supplied. 6. The method according to claim 5, characterized in that Cblorinated soldering agent Trichlorethylene 1st. 009886/1698 ORIGINAL BATHROOM y- 40 7 * Method according to one of claims 1-6, characterized in that that the metal is titanium or a titanium alloy " 8. The method according to any one of claims 1-7, characterized in that that the metal is subjected to a cleaning process with a solvent after the orphanage « For company XMPSBZAL CHEMICAI. HTDUSTRIES LIMITED: MttMTAHWÄW DtHNA- H. FIMCO, DM.-MO. H. KJHt MPL-INa. S. HAiGiK 009886/1698
BATH ORIGINAL