CA1147217A - Process and material for treating metal handling and shaping - Google Patents
Process and material for treating metal handling and shapingInfo
- Publication number
- CA1147217A CA1147217A CA000377491A CA377491A CA1147217A CA 1147217 A CA1147217 A CA 1147217A CA 000377491 A CA000377491 A CA 000377491A CA 377491 A CA377491 A CA 377491A CA 1147217 A CA1147217 A CA 1147217A
- Authority
- CA
- Canada
- Prior art keywords
- graphite
- liquid suspension
- metal
- devices
- sized particles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Mold Materials And Core Materials (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A process of treating metal handling and shaping devices consists of cleaning the devices to the bare metal, applying a liquid suspension of submicron sized particles of graphite to said bare metal of the devices to penetrate the metal and build up smooth adhering and lubricating coating on said metal devices with sufficient excess of graphite to form a slick smooth surface.
A process of treating metal handling and shaping devices consists of cleaning the devices to the bare metal, applying a liquid suspension of submicron sized particles of graphite to said bare metal of the devices to penetrate the metal and build up smooth adhering and lubricating coating on said metal devices with sufficient excess of graphite to form a slick smooth surface.
Description
1~7'~
Back round of the Invention (1) Field of the Invention:
This invention relates to a process and material for treating metal handling and shaping devices such as steel forging dies and ingot molds.
Back round of the Invention (1) Field of the Invention:
This invention relates to a process and material for treating metal handling and shaping devices such as steel forging dies and ingot molds.
(2) Description of the Prior Art:
The present invention relates to a process and material for build-ing up a penetrating coating on forging dies and the like with a material that is not affected by the heat of the metal shaping operation and to which foreign materials will not adhere. The material used in the process forms a penetrating lubricating adhesive coating on the metal handling devices.
The prior art comprises my U.S. Patents Nos. 4,187,334 and 4,187,335, issued February 5, 1980.
Summary of the Invention A process and material for treating metal handling and shaping devices comprises the coating of the devices as by spraying or other application of a material which is essentially sub micron sized particles of graphite in an improved liquid carrier of the extremely fine size of the submicron s7zed particles of graphite which lowers the surface tension of the liquid carrier and enables the graphite particles to penetrate the metal surfaces of the devices and bu;ld up a smooth adhering coating thereover. The liquid carrier comprises water, an aqueous sodium silicate solution and hydrochloric acid, a water soluable resin of the carboxyl group of carboxylic acids, either COOH or C02H and/or composed of a carboxyl group and a hydroxyl group, ("carboxyl; oxatyl, carboxy, 27 the ac7dic COOH group, it determines the basicity of an organic acid "), . `~
11~7Z~7 such as carboxy polymethylene polymers as a dry fluffy acid powder which is power mixed with the submicron sized graphite particles and the liquid carrier to obtain a suitable hydrogen bonding in the solution.
Description of the Preferred Embodiment The material of this invention is particularly suitable for building up penetrating and lubricating adhesive coatings on metal handling and shaping devices and comprises between about 5~ to 25% by weight sub -micron sized particles of graphite, between about 34% to 75% of a solution of water and sodium silicate (Na2Si307) wherein the sodium silicate is present at about 40% of the solution, between about 2~ to 10% concentrated hydro-chloric acid of a 90% purity by weight, between about 33% to 75% of a solution of water and a carboxy polymethylene polymer resin wherein the resin is present in amounts between 1% to 10% of the solution by weight, and between about 15% to 20% water by weight.
The critical particle size of the submicron sized graphite particles being substantially amicron; less than 5m~or 10-7cm as deter-mined by electron microscopy. The submicron sized graphite particles are made by ball milling the finest mesh colloidal graphite particles commer-cially available for a time sufficient to obtain the desired sub micron graphite particle size which eliminates the platelets. The carboxy polymethylene polymer resin powder has a specific gravity of 1.41 and a bulk density of 13 lbs. per cubic foot. It is available as "CARBOPOL"
from B.F. Goodrich Chemical Co. and low cencentrations mixed with water as herein disclosed produce a thin gel-like liquid with penetrating and adhesive qualities.
The liquid carrier as set forth hereinbefore comprises an effective wetting agent which contributes to the ability of the sub micron sized particles of graphite to penetrate the metal of the metal handling and shaping devices.
The lower percentages of the submicron sized particles of graphite in the liquid carrier perform most effectively when a number of applica-tions of the material are applied and when only one or a few applications of the materials are applied to the metal surfaces, higher percentages of the subm;cron sized particles of graphite are more desirable.
In either case, the critical particle size of the graphite in the material penetrates the metal surfaces being treated and builds up an extremely smooth, slick coating to which the metal being handled or shaped will not adhere.
In using the material disclosed herein, the process involves mixing the materials to form a liquid suspension of the submicron sized particles of graphite and then spraying the same by any suitable spraying equipment on cleaned metal surfaces of the metal handling and shaping devices to be treated. One or more coatings are applied as necessary to build up a smooth unbroken surface of the material on the metal devices being treated and the material may be applied to the metal surfaces while they are either hot or cold.
Ingot molds are advantageously treated with the material of the invention and such treatment expedites the stripping of ingots from the molds.
The following specific examples of the material have been found satisfactory:
A. Substantially 8% by weight submicron sized particles of high purity synthetic graphite, substantially 7% by weight concentrated hydrochloric acid of substantially 90% purity, substantially 18% by weight water (H20), substantially 34% by weight aqueous sodium silicate solution 28 wherein the Na2Si307 is present at about 40% by weight of the solution ..~
1~47Z~7 and substantially 33% by weight water soluable carboxy polymethylene polymer resin as a powder wherein the resin is present at substantially 8% by weight of the solution.
B. Substantially 8% by weight submicron sized particles of high purity synthetic graphite, substantially 7~ by weight concentrated hydro-chloric acid of substantially 9G% purity, substantially 18% by weight water (HzO), substantially 67% by weight aqueous sodium silicate solu-tion wherein the Na2Si307 is present at about 40% by weight of the~solu-tion .
C. Substantially 8% by weight submicron sized particles of high purity synthetic graphite, substantially 7% by wight concentrated hydro-chloric acid of substantially 90% purity, substantially 18% by weight water (H20~, substantially 67% by weight aqueous solution of carboxy polymethylene polymer resin as a powder wherein the resin is present at substantially 8% by weight of the aqueous solution of carboxy polymethylene polymer resin as a powder wherein the resin is present at substantially 8% by weight of the aqueous solution.
An alternate liquid carrier has been found to produce a suitable suspension of the submicron sized particles of graphite and substitutes xanthan gum for the resin, the gum is a nutural high molecular weight linear polysaccharide, functioning as a hydrophilic colloid to maintain the submicron sized particles of graphite in suspension and contribute to the penetrating lubricating adhesive coating as described hereinbefore.
A specific example of such an alternate material follows:
D. Substantially 8% by weight submicron sized particles of high purity synthetic graphite, substantially 7~ by weight concentrated hydrochloric acid of substantially 90% purity, substantially 18% by 28 weight water (H20), substantially 67% by weight aqueous solution of ~ -6-,:'' '~
72~
xanthan gum as a powder wherein the gum is present at substantially 8% by weight of the aqueous solution.
Variations in the amounts of xanthan gum may be used as from 1%
to 19% of the aqueous solution.
; The treatment of ingot molds hereinbefore referred to by the process and with the material disclosed herein obtains the desired results by reason of the very fine sized graphite of the material and the manner of the application. Specifically it is known in the art that molten steel in an ingot mold takes carbon from the metal of the ingot mold thereby adversely affecting the interior of the mold by removing the portions thereof and it is also known that when this occurs the stripping of the cooled ingot from the mold becomes more difficult because of the interlock obtained between the solidified metal and the irregular surface of the mold.
By heating an ingot mold the grain structure enlarges and the porosity of the metal increases and in the present process the material is preferably applied to the ingot mold when it is heated as by spraying or dipping the heated mold in the liquid suspension material. Under such conditions the submicron sized particles of graphite aided by the liquid carrier penetrates the metal surfaces of the ingot mold which have been previously cleaned and build up a smooth lubricating and adhering coating which being largely graphite which is able to supply the carbon that molten steel usually absorbs from the ingot mold.
Thus the treating material is sacrificed to some degree and the inner surface of the ingot mild is retained in i-ts desirable smooth condition.
Stripping ingots from the smooth inner surface of the mold is thus consider-ably expedited and the molds last considerably longer as the carbon from the metal of the molds is not sacrificed as has heretofore been common in 28 the art.
' ~7~
The present invention relates to a process and material for build-ing up a penetrating coating on forging dies and the like with a material that is not affected by the heat of the metal shaping operation and to which foreign materials will not adhere. The material used in the process forms a penetrating lubricating adhesive coating on the metal handling devices.
The prior art comprises my U.S. Patents Nos. 4,187,334 and 4,187,335, issued February 5, 1980.
Summary of the Invention A process and material for treating metal handling and shaping devices comprises the coating of the devices as by spraying or other application of a material which is essentially sub micron sized particles of graphite in an improved liquid carrier of the extremely fine size of the submicron s7zed particles of graphite which lowers the surface tension of the liquid carrier and enables the graphite particles to penetrate the metal surfaces of the devices and bu;ld up a smooth adhering coating thereover. The liquid carrier comprises water, an aqueous sodium silicate solution and hydrochloric acid, a water soluable resin of the carboxyl group of carboxylic acids, either COOH or C02H and/or composed of a carboxyl group and a hydroxyl group, ("carboxyl; oxatyl, carboxy, 27 the ac7dic COOH group, it determines the basicity of an organic acid "), . `~
11~7Z~7 such as carboxy polymethylene polymers as a dry fluffy acid powder which is power mixed with the submicron sized graphite particles and the liquid carrier to obtain a suitable hydrogen bonding in the solution.
Description of the Preferred Embodiment The material of this invention is particularly suitable for building up penetrating and lubricating adhesive coatings on metal handling and shaping devices and comprises between about 5~ to 25% by weight sub -micron sized particles of graphite, between about 34% to 75% of a solution of water and sodium silicate (Na2Si307) wherein the sodium silicate is present at about 40% of the solution, between about 2~ to 10% concentrated hydro-chloric acid of a 90% purity by weight, between about 33% to 75% of a solution of water and a carboxy polymethylene polymer resin wherein the resin is present in amounts between 1% to 10% of the solution by weight, and between about 15% to 20% water by weight.
The critical particle size of the submicron sized graphite particles being substantially amicron; less than 5m~or 10-7cm as deter-mined by electron microscopy. The submicron sized graphite particles are made by ball milling the finest mesh colloidal graphite particles commer-cially available for a time sufficient to obtain the desired sub micron graphite particle size which eliminates the platelets. The carboxy polymethylene polymer resin powder has a specific gravity of 1.41 and a bulk density of 13 lbs. per cubic foot. It is available as "CARBOPOL"
from B.F. Goodrich Chemical Co. and low cencentrations mixed with water as herein disclosed produce a thin gel-like liquid with penetrating and adhesive qualities.
The liquid carrier as set forth hereinbefore comprises an effective wetting agent which contributes to the ability of the sub micron sized particles of graphite to penetrate the metal of the metal handling and shaping devices.
The lower percentages of the submicron sized particles of graphite in the liquid carrier perform most effectively when a number of applica-tions of the material are applied and when only one or a few applications of the materials are applied to the metal surfaces, higher percentages of the subm;cron sized particles of graphite are more desirable.
In either case, the critical particle size of the graphite in the material penetrates the metal surfaces being treated and builds up an extremely smooth, slick coating to which the metal being handled or shaped will not adhere.
In using the material disclosed herein, the process involves mixing the materials to form a liquid suspension of the submicron sized particles of graphite and then spraying the same by any suitable spraying equipment on cleaned metal surfaces of the metal handling and shaping devices to be treated. One or more coatings are applied as necessary to build up a smooth unbroken surface of the material on the metal devices being treated and the material may be applied to the metal surfaces while they are either hot or cold.
Ingot molds are advantageously treated with the material of the invention and such treatment expedites the stripping of ingots from the molds.
The following specific examples of the material have been found satisfactory:
A. Substantially 8% by weight submicron sized particles of high purity synthetic graphite, substantially 7% by weight concentrated hydrochloric acid of substantially 90% purity, substantially 18% by weight water (H20), substantially 34% by weight aqueous sodium silicate solution 28 wherein the Na2Si307 is present at about 40% by weight of the solution ..~
1~47Z~7 and substantially 33% by weight water soluable carboxy polymethylene polymer resin as a powder wherein the resin is present at substantially 8% by weight of the solution.
B. Substantially 8% by weight submicron sized particles of high purity synthetic graphite, substantially 7~ by weight concentrated hydro-chloric acid of substantially 9G% purity, substantially 18% by weight water (HzO), substantially 67% by weight aqueous sodium silicate solu-tion wherein the Na2Si307 is present at about 40% by weight of the~solu-tion .
C. Substantially 8% by weight submicron sized particles of high purity synthetic graphite, substantially 7% by wight concentrated hydro-chloric acid of substantially 90% purity, substantially 18% by weight water (H20~, substantially 67% by weight aqueous solution of carboxy polymethylene polymer resin as a powder wherein the resin is present at substantially 8% by weight of the aqueous solution of carboxy polymethylene polymer resin as a powder wherein the resin is present at substantially 8% by weight of the aqueous solution.
An alternate liquid carrier has been found to produce a suitable suspension of the submicron sized particles of graphite and substitutes xanthan gum for the resin, the gum is a nutural high molecular weight linear polysaccharide, functioning as a hydrophilic colloid to maintain the submicron sized particles of graphite in suspension and contribute to the penetrating lubricating adhesive coating as described hereinbefore.
A specific example of such an alternate material follows:
D. Substantially 8% by weight submicron sized particles of high purity synthetic graphite, substantially 7~ by weight concentrated hydrochloric acid of substantially 90% purity, substantially 18% by 28 weight water (H20), substantially 67% by weight aqueous solution of ~ -6-,:'' '~
72~
xanthan gum as a powder wherein the gum is present at substantially 8% by weight of the aqueous solution.
Variations in the amounts of xanthan gum may be used as from 1%
to 19% of the aqueous solution.
; The treatment of ingot molds hereinbefore referred to by the process and with the material disclosed herein obtains the desired results by reason of the very fine sized graphite of the material and the manner of the application. Specifically it is known in the art that molten steel in an ingot mold takes carbon from the metal of the ingot mold thereby adversely affecting the interior of the mold by removing the portions thereof and it is also known that when this occurs the stripping of the cooled ingot from the mold becomes more difficult because of the interlock obtained between the solidified metal and the irregular surface of the mold.
By heating an ingot mold the grain structure enlarges and the porosity of the metal increases and in the present process the material is preferably applied to the ingot mold when it is heated as by spraying or dipping the heated mold in the liquid suspension material. Under such conditions the submicron sized particles of graphite aided by the liquid carrier penetrates the metal surfaces of the ingot mold which have been previously cleaned and build up a smooth lubricating and adhering coating which being largely graphite which is able to supply the carbon that molten steel usually absorbs from the ingot mold.
Thus the treating material is sacrificed to some degree and the inner surface of the ingot mild is retained in i-ts desirable smooth condition.
Stripping ingots from the smooth inner surface of the mold is thus consider-ably expedited and the molds last considerably longer as the carbon from the metal of the molds is not sacrificed as has heretofore been common in 28 the art.
' ~7~
Claims (10)
1. A process of treating metal handling and shaping devices that consists essentially of the steps of cleaning said devices to the bare metal, penetrating a liquid suspension of submicron sized particles of graphite into said bare metal of the devices, said liquid suspension including at least 5% to 25% submicron sized particles of graphite, apply-ing enough of said liquid suspension of graphite to build up smooth adhering and lubricating coating on said metal portions and building up sufficient excess of graphite on said devices to form a slick smooth surface, the size of said submicron particles of graphite being no larger than 5mµ
as determined by electron microscopy.
as determined by electron microscopy.
2. The process of Claim 1 and wherein several penetrating coatings of said liquid suspension of submicron sized particles of graphite are applied to said metal devices successively.
3. The process of Claim 1 and wherein several penetrating coatings of said liquid suspension of submicron sized particles of graphite are sprayed on said metal devices successively.
4. The process of treating metal handling and shaping devices set forth in Claim 1 and wherein the devices are heated to a temperature at which the grain structure expands and the porosity of the metal increases and wherein the liquid suspension of submicron sized particles of graphite is applied to the heated device.
5. The process of Claim 1 and wherein the liquid suspension includes sodium silicate.
6. The process of Claim 1 and wherein the liquid suspension includes a water soluable resin of the carboxyl group of carboxylic acids.
7. The process of Claim 1 and wherein the liquid suspension includes carboxy polymethylene polymer resin and sodium silicate.
8. The process of Claim 1 and wherein the liquid suspension includes xanthan gum and sodium silicate.
9. The process of Claim 1 and wherein the liquid suspension includes xanthan gum and carboxy polymethylene resin.
10. The process of Claim 1 and wherein the liquid suspension includes xanthan gum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000377491A CA1147217A (en) | 1981-05-13 | 1981-05-13 | Process and material for treating metal handling and shaping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000377491A CA1147217A (en) | 1981-05-13 | 1981-05-13 | Process and material for treating metal handling and shaping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1147217A true CA1147217A (en) | 1983-05-31 |
Family
ID=4119940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000377491A Expired CA1147217A (en) | 1981-05-13 | 1981-05-13 | Process and material for treating metal handling and shaping |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1147217A (en) |
-
1981
- 1981-05-13 CA CA000377491A patent/CA1147217A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2263919C (en) | Method for hardfacing a metal surface | |
| JP2545282B2 (en) | Method for producing spherical silica particles | |
| DE69302265T2 (en) | COATABLE MIXTURES CONTAINING ERODABLE FILLER AGGLOMERATES, METHODS FOR THE PRODUCTION THEREOF, GRINDING BODIES WITH HARDENED VERSIONS THEREOF AND METHODS FOR THE PRODUCTION OF THE BODIES | |
| CA1038999A (en) | Spherical-shaped ionomer and ethylene/carboxylic acid copolymer powders and method | |
| FI941168A0 (en) | Grinding of alkaline earth metal pigments | |
| JPS61258829A (en) | Polyamide coated particle and its production | |
| US4289804A (en) | Process for treating metal handling and shaping devices | |
| CA1147217A (en) | Process and material for treating metal handling and shaping | |
| CA2110660A1 (en) | Alkali metal cyanide granulates and a process for their preparation | |
| JPH0256300B2 (en) | ||
| CN1041322C (en) | Dry grouting agent and method of producing same | |
| JPH0431318A (en) | Double-layer surface-treatment of calcium carbonate | |
| CA1154427A (en) | Material for treating coke oven doors and jambs to prevent the build up of tar thereon | |
| JPS6044274B2 (en) | Method of producing boron nitride fiber articles from boron oxide fibers | |
| CA1127918A (en) | Process for treating coke oven doors and jambs to prevent the build up of tar thereon | |
| EP1194220B1 (en) | Method for the coating of particles, the use of a coating suspension and a coated product | |
| JP2519465B2 (en) | Composite powder and manufacturing method thereof | |
| JPH0694369B2 (en) | Modified fused spherical silica and method for producing the same | |
| US20240026119A1 (en) | Aluminum nitride granular powder and resin composition | |
| JP3185007B2 (en) | Method for producing sodium hexatitanate fiber | |
| US3493642A (en) | Method of preparing agglomerates of reduced efflorescence | |
| JPS61143502A (en) | Production of granular material of lead alloy | |
| EP0296401B1 (en) | Process for manufacturing fine silica particles | |
| JP3313427B2 (en) | Method for producing ceramic granules | |
| GB2055306A (en) | A process for treating coke oven parts |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |