DE1796342A1 - FLAME SPRAYING MATERIAL MADE OF MULTIPLE COMPONENTS - Google Patents

Description

PATtNTANWAUt

DR.-ING. BY KRESSLER DR.-ING. SCHÖNWALD DR.-1NG.-TH. MCYER DR. FUES DIPL-CHCM. ALOK FROM KREISLER DIPL.-CKEM. CAROLA KELLER DR.-5NG. KLÖPSCH

Dipl.-Inß.Seiting

COLOGNE 1 DEICHMANNH

ßg

COLOGNE 1, DEICHMANNHAUS

Cologne, February 27, 1973 Dr M / Ws

Metco Inc. 1101 Prospect Avenue, Westbury, New York UNITED STATES.

Multi-component flame spray material.

Resignation from patent ............ "

Patent application A.Z. ρ 1.5 Pl 3 ^ 7.3-4-5 ... ··

The invention relates to a multi-component one Flame spray material that is at least zvrei exothermic in the heat has components which react to form an intermetallic compound.

From French patent specification 1 313 303 a flame spray material is disclosed known in which by conventional flame spraying methods finely distributed individual particles on the Underlay are sprayed on, the core of which represents one component and whose coating covering the core represents another component. The two that differ from each other Ingredients are able to work synergistically in such a ™

react exothermically with each other that they are in the heat one Form intermetallic connection. The well-known flame spray material can also be sprayed on in the form of wires, a soul from one and a shell from the other Have material.

French patent 1 209 669 describes a metallic one Flame spray powder, which is self-flowing and can also be applied using known flame spray methods

409 84 1/03 79

can, including the mixing of the self-flowing metal powder is mentioned with a plastic mass with exclusive deformation of the material to flame spray wires.

It has been found that flame spray wires of the described Type often tend to form cavities or bubbles at their tip when heated, a phenomenon that can lead to the generation of inconsistent and defective coatings on the substrate, especially if such flame spraying materials are used, "the at least two in the heat reacting exothermically to form intermetallic compounds Have components. ·

The invention is based on the object of specifying flame spray wires for such flame spray materials which, when heated do not show any cavities or blisters at the tip / so that in all cases there are flawless deposits on the base were obtained.

The invention is based on one of several components existing flararn spray material, which is at least two in the heat "exothermic with the formation of an intermetallic Compound having reactive components and is in the form of bodies, the individual parts of which are structurally related to one another are connected that they are in intimate contact and melt during the spraying. It is characteristic that the flame spraying material is in the form of wires or rods containing the components, wherein a jacket consisting of the one component envelops small particles of at least one further component and the shell substance melts lower than the powder substance.

409841/0379

BATH ORIGINAL

The invention makes it possible in a single operation to deposit high-quality coverings with self-binding properties that are wear-resistant, leak-proof and resistant to oxidation and adhere to the substrate without any mandatory surface preparation or roughening. A cavity or Bubble formation never occurs. The non-blistering ones Form wires of the invention, due to the difference in melting point between the sheath substance and powder substance, tapered or dike beveled Wire ends off when they are melted together or sprayed on.

The term "gram calories per gram atom" refers to the number in gram calories, which is the average atomic weight in grams of the intermetallic compound formed in the Education generates. Although the ingredients are preferably in those required for the formation of the intermetallic compound stoichiometric ratios should exist is It is also possible to have an excess of one over the other apply.

According to one embodiment of the invention, a flame spray material is used one in which the reacting ingredients release at least 3000 gram calories per gram atom, preferably 7500 gram calories, and the following Metal pairs consist of:

AO 9 8 4 1/0379 BAD ORIGINAL

Λβ Ce .B Hf Ce In M & Sb Ta Be

Al As -B Nb Ce Ng Mg Sn V Be

Al Au B Ts Ce Pb Na Pb Ti Be

Al B B Th Ce Si Na Sb Mg Te

Al Ba B Ti Ce Sn Na Se Ni Te

Al Ce BV Ce Tl Na Sn Si Th

Al Mo BW .Ce Zn Na Te Si W

Al Nb B Zr Ga Na Na Tl Co Si

φ Al Ti ■ Ba Bi Ga Pr Nb Si Ni Si

Al Se Ba Pb Ga Sb Ni Th Si Ta

Al Ta Ba Sb Ga Te Pb Pr

Al Te Be Co Ga U Pb Pu

Al U Be Cr Ge Mg Pb Se

Al V Be Ni Ge Nb Pb Tl

Al W Be Np Ge Zr Pd U

As Cd Be Pu Li In Pr Sn

As Ga Be U In Te Pr Tl

As In Be Zr In Ru Sb Zr

As Mg Bi Ca K Sb Se Sn

As Zn Bi Ce K Se Se Th

φ BY Bi K K Sn Se Tl

B Ca Bi Li K Tf Cu Te

B Cr Bi Mg La Pb Si U

Al Zr Bi Na La Sb Si V

Bi Se La Sn Si Zr

Bi Te La Tf Sn Te

Bi Th La Zn Sn U

Ca Pb Li Pb Sn Zr

Ca Sn Li Sb Te Zn

Ca Tl Li Sn Mo Be

. Cd Li 'Li Tn Nb Be

Cd Na Li Zn

409841/0379

In addition, the Flaram Spritzraaterjal of the invention can still contain at least one further flame spray material.

Flame spraying materials, whose shell substance is made of aluminum and their small parts, have proven to be particularly effective Nickel or nickel and aluminum is made.

Materials that additionally contain a metal hydride are also of great importance, but materials can also be used syringes of which one · metallic component is at least partly v / ej se is in the form of a metal hydride. Can also be sprayed on Material additionally contain boron and / or silicon.

The following examples illustrate the invention. Unless otherwise stated, all quantities are given as To view weight information.

0 9S417Q37Q

BATH

example χ

a) A mixture of 6% beryllium and 9 · ^z l% Kobaltpulvcr vmrde vigorously mixed and compressed in the form of cylindrical Brikettchen, which were then filled in a Berylliumröhro of 0.95 cm in outer diameter, whereafter the tube ends were welded shut. The diameter was initially constricted to 0.65 cm, then reduced to 0.4-7 cm and finally brought to a final diameter of 0.32 cm, which corresponded to the finished wire. The wire has now been relaxed and rolled up. It was then sprayed on using a conventional wire flame spray gun. The spraying was done using acce-

tylen at a pressure of about 1.05 kg / cm and a flow rate of 1.05 cbm per hour. oxygen

ρ * 'was supplied as an oxidizing gas at a pressure of 2.67 kg / cm "and a flow rate of 2.10 cbm / hour. Air was supplied as a blowing gas at a pressure of 3 _} 8 kg / cm ~ a flow rate of 0.85 cbn / ϊΓχΐ 'The wire was sprayed on at a rate of 2.5 cm / sec. The material was on the surface of a pre-ground and machine re-ground, cold

ρ rolled steel with a tensile strength of 270 kg / cm. The sprayed one. Coating is hard and dense.

It is wear and oxidation resistant and can also be used as a Serve as a base for spraying on further toppings.

Example 2

The procedure of Example 1 was repeated ', but it used instead of the cobalt powder chromium, -and in amounts of 2 to 95% · ¹ V, relative to -the total amount of beryllium and chromium. The spraying provided a high quality covering that had self-binding properties and at high levels. ! Temperatures was resistant to oxidation «

-T- A09841 / 0379 ■ -

Example- 3

The. The procedure of Example 1 was repeated using niobium powder instead of cobalt powder, in amounts of 40 to 90 %, preferably 50% to 55%, based on the total content of mob and beryllium of high quality, which is resistant to oxidation at high temperatures and can be used to protect bases made of tantalum and molybdenum against oxidation.

example

The procedure of Example 1 was repeated, using tantalum powder instead of cobalt powder, in amounts of 40 to 90%, preferably 65 to 75%, of tantalum, based on the total amount of tantalum and beryllium. The result was a dense, highly qualified covering with self-binding properties, which was resistant to oxidation at high temperatures.

Example 5 "

The procedure of Example 1 was repeated, wherein instead of beryllium powder now aluminum powder and instead of cobalt powder now boron powder in Kengen from 40 to 90 / », based on the total amount of boron and Aluminum. The sprayed-on covering had self-binding properties and was at high temperatures resistant to oxidation.

Example 6

The procedure of Example 5 was repeated, but a material was sprayed on which additionally contained 0.5 to 5 % boron and / or 0.5 to 5 % silicon, based on the total amount of the constituents the coating according to Example 3 excepted, dnß

409841/0379 ..'.-.

-8 - ■■ '.

BATH ORIGINAL

when heated to high temperatures in air to the. Surface of the formed intermetallic Connectivity \\ i \ *, a very thin, dense, adherent protective oxide film was formed. This is shatterproof due to Värmeschock and appears to be of a self-balancing nature.

Example 7 -; ..- _:

The procedure according to Example 1 was repeated, but 1 to 10 % and preferably 1 to 5% of the total amount of the components, titanium hydride with a particle size below 150 microns, preferably below 44 microns, the Core material added. The results were the same as in Example 1 except that the coating formed had an improved physical pesti ^ -. and contains considerably less influences due to oxidation. Instead of the titanium hydride, other metal hydrides can be used.

-9-409841 / 0379

BATH ORIGINAL

Claims (3)

17963A2 claims; 1. Flame spraying agent consisting of several components, at least two exothermic in the heat with formation an intermetallic compound having reactive components and is in the form of bodies, the individual parts of which are structurally connected to one another in such a way that they during of the spraying are in intimate contact and melt, characterized in that the flame spraying material in the form of the components containing wires or rods is present, wherein a sheath consisting of the one component is a small part Chen enveloped from at least one other component and the Shell substance melts lower than the powder substance. 2. Flame spray material according to claim 1, characterized in that that the components that react with one another are at least ^ 000 Emit gram calories per gram atom, preferably 7500 gram calories and consist of the following metal pairs: - 10 - 40984 1/0379 Ag Ce B Hf Ce In Mg Sb Ta Be Λ1 As B Nb Ce Ng Mg Sn V Be Λ1 Au BTs Ce Pb Na Pb Ti Be Al B B Th Ce SI Na Sb Mg Te AlBa BTi CeSn NaSe MiTe Al Ce BV Ce Tl Na Sn Si Th Al Mo BW · Ce Zn Na Te Si W Al Nb B Zr Ga Na Na Tl Co Si Al Ti Ba Bi Ca Pr Nb Si Ni Si Al Se Ba Pb Ga Sb Hi Th Si Ta Al Ta Ba Sb Ga Te Pb Pr Al Te Be Co Ga U Pb Pu Al U Be Cr Ge Mg Pb Se Al V Be Ni Ge Nb Pb Tl Al W Be Np Ge Zr Pd U As Cd Be Pu Li In Pr Sn As Ga Be U In Te Pr Tl As In Be Zr In Ru Sb Zr As Mg Bi Ca K Sb Se Sn As Zn Bi Ce K Se Se Th BY Bi K K Sn Se Tl B Ca · Bi Li K Tf Cu Te B Cr Bi Mg La Pb Si U Al Zr Bi Na La Sb Si V Bi Se La Sn Si Zr . Bi Te La Tf Sn Te Bi Th La Zn Sn U. Ca Pb Li Pb Sn Zr Ca Sn Li Sb Te Zn Ca Tl Li Sn Mo Be Cd Li Li Tn Nb Be Cd Na Li Zn A 0 9 8 U 1/0 3 7 9 BATH ORIGINAL -IX- 3. Flaram spray material according to claim 1 and 2, characterized in that the shell substance consists of aluminum and the small particles consist of nickel or nickel and aluminum. K. Flaminprit zma.terial according to claim 1 to J, characterized / that it additionally contains a metal hydride or that one of the constituents is at least in part a metal hydride. 5 · Scarfing spray material according to claim 1 to ~ *>, characterized in that it additionally contains boron and / or silicon. 40 9841/0379 BATH