CA1209175A - Method of protecting a metallic surface susceptible to abrasion by rock like material - Google Patents
Method of protecting a metallic surface susceptible to abrasion by rock like materialInfo
- Publication number
- CA1209175A CA1209175A CA000383888A CA383888A CA1209175A CA 1209175 A CA1209175 A CA 1209175A CA 000383888 A CA000383888 A CA 000383888A CA 383888 A CA383888 A CA 383888A CA 1209175 A CA1209175 A CA 1209175A
- Authority
- CA
- Canada
- Prior art keywords
- stud
- metallic
- abrasion resistant
- abrasion
- chromium
- 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
- 239000000463 material Substances 0.000 title claims abstract description 42
- 238000005299 abrasion Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title abstract description 5
- 239000011435 rock Substances 0.000 title 1
- 238000003466 welding Methods 0.000 claims abstract description 28
- 239000007769 metal material Substances 0.000 claims abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 239000011651 chromium Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 4
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims 5
- 239000000956 alloy Substances 0.000 claims 5
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 claims 1
- -1 chromium carbides Chemical class 0.000 claims 1
- 230000004907 flux Effects 0.000 claims 1
- 150000001247 metal acetylides Chemical class 0.000 claims 1
- 229910001220 stainless steel Inorganic materials 0.000 claims 1
- 239000000758 substrate Substances 0.000 claims 1
- 229910003470 tongbaite Inorganic materials 0.000 claims 1
- 239000002344 surface layer Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 3
- 230000004224 protection Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 2
- 241000975394 Evechinus chloroticus Species 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 241000283986 Lepus Species 0.000 description 1
- ZBHWCYGNOTVMJB-UHFFFAOYSA-N [C].[Cr].[Fe] Chemical compound [C].[Cr].[Fe] ZBHWCYGNOTVMJB-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229940107218 chromium Drugs 0.000 description 1
- 235000012721 chromium Nutrition 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A method of protecting a metallic surface susceptible to abrasion by rock-like material com-prises stud welding studs of abrasion resistant metallic material to the surface in closely spaced relationship to cause the majority of said rock-like material to contact the abrasion resistant studs instead of the surface.
A method of protecting a metallic surface susceptible to abrasion by rock-like material com-prises stud welding studs of abrasion resistant metallic material to the surface in closely spaced relationship to cause the majority of said rock-like material to contact the abrasion resistant studs instead of the surface.
Description
~)9~
- A METHOD OF PROTECTING A METALLIC
SURFACE SUSCEPTIBLE TO ABRASION BY
ROC~C-LIKE MATERIAL
This invention relates to the protection of metallic surfaces susceptible to abrasion by rock-like material.
There are various industrial operations in which a metallic surface is susceptible to significant abrasion by rock-like material, for example, the upper surface of a chute down which rock-like material passes and upon which the rock-like material impinges with con-siderable force as a result of its falling down the chute. Another example is a surface at the leading end of a ground engaging tool of an earth working machine, such as a loading shovel or drag-line bucket, over which rock-like material passes as it is removed from the ground and forced over the surface concerned.
Although such surfaces are usually made of hard wearing metallic material, such surfaces never-theless hecome abraded after a period of time to such an extent that they have to be renewed. However, such renewal is difficult because the surface is usually an integral part of at least a major component of the equipment concerned, such as a chute or ground engag-ing tool. Since such equipment is generally of rela-- tively large size, it is impractical to transport the equipment to a repair shop.
I, 1~9~7~
.
Renewal of such hard wearing metallic surfaces is conventionally carried out in situ by arc welding a consumable electrode of the desired material onto the surface to form a new surface layer. However, this practice is time-consuming and expensive because arc welding a new surface layer requires the presence of an operator with a relatively high level of welding skill, and further is not entirely satisfactory because the range of wear-resistan~ materials which can be welded by such conventional arc welding is some-what limited. Often, a preferred wear-resistant material is not satisfactorily weldable by such arc weld-ing, and a less desirable material has to be used because it can be welded to form a new surface layer. Also, the material is usually diluted with iron during arc welding, and such chemical dilution alters the wear characteristics of the material. Even when a preferred wear-resistant material can be satisfactorily welaed by such arc welding, the cost of the operation is undesirably high because of the requirement for a relatively highly skilled operator and the time involved.
It is therefore an object of the invention to provide a method of protecting metallic surfaces sus-ceptible to abrasion by rock-like material which over-comes the above mentionea disadvantages According to the invention, a metallic sur-face susceptible to abrasion by rock-like material is protected by stud welaing stuas of abrasion resistant metallic material to the surface in closely spaced relationship to cause the majority of the rock-like material to contact the abrasion resistant studs instead of the surface.
Such welding can be carried out by equipment of the kina used for electric arc welding stud fasteners in place. Hence, the operator can be a lesser skilled per-son, and less time is needed to carry out the welding - ~2~7S
operation. Further, a wider range of materials can be applied by use of the present invention -than with con-ventional arc welding.
Thus, for example, ground engaging tools or chutes of the kind previously mentioned can be provided with abrasion resistant surfaces in situ by an operator by use of equipment which is not only less skill demand-ing but is also less fatiguing to use than equipment of the kind required for conventional arc welding. The l advantages of the present invention when used in con-nection with ground engaging tools or chutes for example are therefore readily apparent.
Advantageously, the studs are of cast abrasion resistant metallic material. Alternatively however, the studs may be made of metal powder cOmpacted by known powder metallurgy techniques. Each stud may comprise a first portion of abrasion resistant metallic material weldable to the surface and a second metallic portion attachable to stud-welding equipment, with the first portion being connected to the second portion by frangible metallic connecting means, with the second portions of the studs being removed after stud welding by breaking the connect-ing means. The second portion may be made of a material other than the material of which the first portion is made, for example the second portion may be made of a cheaper material. Alternatively, the first and second portions - and connecting means may be made of the abrasion resist-ant metallic material and form an integral stud.
The surface may be that of a chute down which rock-like material is passed, or may be located adjacent to the leading edge of earth-working equipment which in use engages rock-like material in the ground.
Embodiments of the invention will now be des-cribed, by way of example, with reference to the accom-panying drawings, of which:
- lZ~91'~
Figure 1 is a perspective view of a discharge chute with studs welded to the lower end in accordance with the invention, Figure 2 is a simiLar view of a ground engag-ing tool with a forwardly projecting portion to which studs have been welded in accordance with the invention, Figure 3 is a sectional view of a stud according to one embodiment of the invention, Figure 4 is a similar view of a stud according to another embodiment, Figure 5 is a similar view of a stud according to a further embodiment, and Figure 6 is a sectional view along the line 6-6 of Figure I.
referring first to Figure 1, a discharge chute 10 for conveying rock-like material from one level to a lower level has an inclined curved base 12 with side walls 14, 16. The base 12 is of hard wearing steel, and in accordance with the invention the surface of the base 12 at the lower end of the chute is protected by studs 18 of cast abrasion resistant metallic material, such as a high carbon chromium iron alloy. The studs are welded to the surface of the base 12 by electric arc stud welding equipment in closely spaced relationship, preferably as close as the stud-welding equipment will allow, in a close packed array.
The stud spacing may be up to ten times the stud diameter to provide general protection and one to two times for more severe conditions. Generally, the initial stud height should be in the range of from about 0.1 to about 2 times the stud diameter and preferably in the range of from about /3 to about /2 times the diameter for most applications.
'7~
In one specific example, the studs 18 each had a diameter of 5/8th inch, and the spacing between each stud from centre to centre was 1 inch. There were 60 studs on a rectangular surface measuring 6 inches by 11 inches, and the initial height of each stud was equal to about half its diameter.
In the absence of the studs 18, the lower end of the hase 12 of the chute 10 would be abraded by the rock-like material falling down the chute to such an extent that repair would be necessary after a relatively short period of time. As previously mentioned, it has teen conventional practice to arc weld a consumable electrode of suitable material onto a surface to form a new surface layer, with this practice being time-consuming and expensive. In contrast, with the present invention, the studs 18 can ye applied with stud welding equipment by a less skilled person, with less time being required.
Figure 2 shows a ground engaging tool in the form of a mechanical shovel 20 which in use is part of an earth moving machine. The shovel 20 has a base 22 of hard wear-ing steel, side walls 24, 26 and a rear wall 28. The base 22 has a leading end portion 30 which projects beyond the side walls 24, 26.
A person skilled in the art will readily appre-ciate that the chute of Figure 1 and the ground engagingtool of Figure 2 are only two examples of industrial applications of the invention, and that there are many other possible applications.
The upper surface of the ~ojecting portion 30 is protected by studs 32 is a similar manner to the pro-tection by studs 18 in the embodiment of Figure 1. In use, the projecting portion 30 digs into the ground and, in the absence of the studs 30, rock-like material in the ground would be forced into engagement with the upper surface of the projecting portion 30 and cause 12~9~7~
relatively rapid wear thereto. With the present inven-tion, the rock-like material primarily engages the studs rather than the surface of the projecting portion 30 itself.
Figure 3 shows one form of stud suitable for use in the present invention. The stud 32 has a main body portion 34 and a secondary portion 36 of larger mass than the main body portion 34. The main body portion 34 is of steel alloy containing about 4% carbon and about 33% chrom-ium, with the balance being iron. The body portion 34 has an upwardly projecting spigot 38 which is a tight fit in a recess 40 in one end of the secondary portion 36, which is made of mild steel. The lower end of the main body portion 34 has an aluminum tip 42 cold welded thereto.
The complete stud 32 is fitted into electric arc stud welding equipment and the lower end of the main body portion 34 is welded to the steel surface to be pro tected. The aluminum tip 42 functions as an oxygen getter or fluxing agent by forming aluminum oxide which then floats away during the welding operation to leave a clean weld. After welding, the secondary portion 36 is struck by a hammer or other implement to break off the spigot 38 from the main body portion 34, thereby removing the secondary portion 36 and spigot 38 and leaving the main body portion 34 of abrasion resistant steel alloy welded to the surface concerned. Thus, in use, the initial stud height is the height of the main body portion 34.
The secondary portion 36 is of relatively in-expensive material compared to the main body portion 34,and is provided to facilitate the stud welding of the main body portion 34.
Figure 4 shows an alternative stud 42 having a body 44 similar to the main body portion 34 of the stud of Figure 3, and having a rear spigot 46 to facilitate ~Z(:~9~'75 engagement with stud welding equipment. The body 44 has a mild steel sheath 48 brazed thereto to facilitate welding of the stud to the surface.
Figure 5 shows another alternative stud 50, which is similar in dimensions to the stud 32 of Figure 3. The stud 50 has a main body portion 52 and a secondary portion 54 integrally connected by a neck portion 56, with the stud in fact being an integral body of abrasion resistant metallic material. The lower surface of the main portion 52 has a small central projection 58 over which an aluminum washer 60 is a force fit, the aluminum washer 60 serving the same purpose as the aluminum tip 42 in the embodiment of Figure 3.
The advantages of the present invention will therefore be clearly apparent from the above description.
Other embodiments and examples will also be apparent to a person skilled in the art, the scope of the invention being defined in the appended claims.
- A METHOD OF PROTECTING A METALLIC
SURFACE SUSCEPTIBLE TO ABRASION BY
ROC~C-LIKE MATERIAL
This invention relates to the protection of metallic surfaces susceptible to abrasion by rock-like material.
There are various industrial operations in which a metallic surface is susceptible to significant abrasion by rock-like material, for example, the upper surface of a chute down which rock-like material passes and upon which the rock-like material impinges with con-siderable force as a result of its falling down the chute. Another example is a surface at the leading end of a ground engaging tool of an earth working machine, such as a loading shovel or drag-line bucket, over which rock-like material passes as it is removed from the ground and forced over the surface concerned.
Although such surfaces are usually made of hard wearing metallic material, such surfaces never-theless hecome abraded after a period of time to such an extent that they have to be renewed. However, such renewal is difficult because the surface is usually an integral part of at least a major component of the equipment concerned, such as a chute or ground engag-ing tool. Since such equipment is generally of rela-- tively large size, it is impractical to transport the equipment to a repair shop.
I, 1~9~7~
.
Renewal of such hard wearing metallic surfaces is conventionally carried out in situ by arc welding a consumable electrode of the desired material onto the surface to form a new surface layer. However, this practice is time-consuming and expensive because arc welding a new surface layer requires the presence of an operator with a relatively high level of welding skill, and further is not entirely satisfactory because the range of wear-resistan~ materials which can be welded by such conventional arc welding is some-what limited. Often, a preferred wear-resistant material is not satisfactorily weldable by such arc weld-ing, and a less desirable material has to be used because it can be welded to form a new surface layer. Also, the material is usually diluted with iron during arc welding, and such chemical dilution alters the wear characteristics of the material. Even when a preferred wear-resistant material can be satisfactorily welaed by such arc welding, the cost of the operation is undesirably high because of the requirement for a relatively highly skilled operator and the time involved.
It is therefore an object of the invention to provide a method of protecting metallic surfaces sus-ceptible to abrasion by rock-like material which over-comes the above mentionea disadvantages According to the invention, a metallic sur-face susceptible to abrasion by rock-like material is protected by stud welaing stuas of abrasion resistant metallic material to the surface in closely spaced relationship to cause the majority of the rock-like material to contact the abrasion resistant studs instead of the surface.
Such welding can be carried out by equipment of the kina used for electric arc welding stud fasteners in place. Hence, the operator can be a lesser skilled per-son, and less time is needed to carry out the welding - ~2~7S
operation. Further, a wider range of materials can be applied by use of the present invention -than with con-ventional arc welding.
Thus, for example, ground engaging tools or chutes of the kind previously mentioned can be provided with abrasion resistant surfaces in situ by an operator by use of equipment which is not only less skill demand-ing but is also less fatiguing to use than equipment of the kind required for conventional arc welding. The l advantages of the present invention when used in con-nection with ground engaging tools or chutes for example are therefore readily apparent.
Advantageously, the studs are of cast abrasion resistant metallic material. Alternatively however, the studs may be made of metal powder cOmpacted by known powder metallurgy techniques. Each stud may comprise a first portion of abrasion resistant metallic material weldable to the surface and a second metallic portion attachable to stud-welding equipment, with the first portion being connected to the second portion by frangible metallic connecting means, with the second portions of the studs being removed after stud welding by breaking the connect-ing means. The second portion may be made of a material other than the material of which the first portion is made, for example the second portion may be made of a cheaper material. Alternatively, the first and second portions - and connecting means may be made of the abrasion resist-ant metallic material and form an integral stud.
The surface may be that of a chute down which rock-like material is passed, or may be located adjacent to the leading edge of earth-working equipment which in use engages rock-like material in the ground.
Embodiments of the invention will now be des-cribed, by way of example, with reference to the accom-panying drawings, of which:
- lZ~91'~
Figure 1 is a perspective view of a discharge chute with studs welded to the lower end in accordance with the invention, Figure 2 is a simiLar view of a ground engag-ing tool with a forwardly projecting portion to which studs have been welded in accordance with the invention, Figure 3 is a sectional view of a stud according to one embodiment of the invention, Figure 4 is a similar view of a stud according to another embodiment, Figure 5 is a similar view of a stud according to a further embodiment, and Figure 6 is a sectional view along the line 6-6 of Figure I.
referring first to Figure 1, a discharge chute 10 for conveying rock-like material from one level to a lower level has an inclined curved base 12 with side walls 14, 16. The base 12 is of hard wearing steel, and in accordance with the invention the surface of the base 12 at the lower end of the chute is protected by studs 18 of cast abrasion resistant metallic material, such as a high carbon chromium iron alloy. The studs are welded to the surface of the base 12 by electric arc stud welding equipment in closely spaced relationship, preferably as close as the stud-welding equipment will allow, in a close packed array.
The stud spacing may be up to ten times the stud diameter to provide general protection and one to two times for more severe conditions. Generally, the initial stud height should be in the range of from about 0.1 to about 2 times the stud diameter and preferably in the range of from about /3 to about /2 times the diameter for most applications.
'7~
In one specific example, the studs 18 each had a diameter of 5/8th inch, and the spacing between each stud from centre to centre was 1 inch. There were 60 studs on a rectangular surface measuring 6 inches by 11 inches, and the initial height of each stud was equal to about half its diameter.
In the absence of the studs 18, the lower end of the hase 12 of the chute 10 would be abraded by the rock-like material falling down the chute to such an extent that repair would be necessary after a relatively short period of time. As previously mentioned, it has teen conventional practice to arc weld a consumable electrode of suitable material onto a surface to form a new surface layer, with this practice being time-consuming and expensive. In contrast, with the present invention, the studs 18 can ye applied with stud welding equipment by a less skilled person, with less time being required.
Figure 2 shows a ground engaging tool in the form of a mechanical shovel 20 which in use is part of an earth moving machine. The shovel 20 has a base 22 of hard wear-ing steel, side walls 24, 26 and a rear wall 28. The base 22 has a leading end portion 30 which projects beyond the side walls 24, 26.
A person skilled in the art will readily appre-ciate that the chute of Figure 1 and the ground engagingtool of Figure 2 are only two examples of industrial applications of the invention, and that there are many other possible applications.
The upper surface of the ~ojecting portion 30 is protected by studs 32 is a similar manner to the pro-tection by studs 18 in the embodiment of Figure 1. In use, the projecting portion 30 digs into the ground and, in the absence of the studs 30, rock-like material in the ground would be forced into engagement with the upper surface of the projecting portion 30 and cause 12~9~7~
relatively rapid wear thereto. With the present inven-tion, the rock-like material primarily engages the studs rather than the surface of the projecting portion 30 itself.
Figure 3 shows one form of stud suitable for use in the present invention. The stud 32 has a main body portion 34 and a secondary portion 36 of larger mass than the main body portion 34. The main body portion 34 is of steel alloy containing about 4% carbon and about 33% chrom-ium, with the balance being iron. The body portion 34 has an upwardly projecting spigot 38 which is a tight fit in a recess 40 in one end of the secondary portion 36, which is made of mild steel. The lower end of the main body portion 34 has an aluminum tip 42 cold welded thereto.
The complete stud 32 is fitted into electric arc stud welding equipment and the lower end of the main body portion 34 is welded to the steel surface to be pro tected. The aluminum tip 42 functions as an oxygen getter or fluxing agent by forming aluminum oxide which then floats away during the welding operation to leave a clean weld. After welding, the secondary portion 36 is struck by a hammer or other implement to break off the spigot 38 from the main body portion 34, thereby removing the secondary portion 36 and spigot 38 and leaving the main body portion 34 of abrasion resistant steel alloy welded to the surface concerned. Thus, in use, the initial stud height is the height of the main body portion 34.
The secondary portion 36 is of relatively in-expensive material compared to the main body portion 34,and is provided to facilitate the stud welding of the main body portion 34.
Figure 4 shows an alternative stud 42 having a body 44 similar to the main body portion 34 of the stud of Figure 3, and having a rear spigot 46 to facilitate ~Z(:~9~'75 engagement with stud welding equipment. The body 44 has a mild steel sheath 48 brazed thereto to facilitate welding of the stud to the surface.
Figure 5 shows another alternative stud 50, which is similar in dimensions to the stud 32 of Figure 3. The stud 50 has a main body portion 52 and a secondary portion 54 integrally connected by a neck portion 56, with the stud in fact being an integral body of abrasion resistant metallic material. The lower surface of the main portion 52 has a small central projection 58 over which an aluminum washer 60 is a force fit, the aluminum washer 60 serving the same purpose as the aluminum tip 42 in the embodiment of Figure 3.
The advantages of the present invention will therefore be clearly apparent from the above description.
Other embodiments and examples will also be apparent to a person skilled in the art, the scope of the invention being defined in the appended claims.
Claims (23)
1. A stud comprising a body having a first portion of abrasion resistant metallic material weldable to a metallic surface by stud welding, a second metallic por-tion attachable to stud welding equipment, and frangible metallic connecting means connecting the first portion to the second portion.
2. A stud according to claim 1 wherein the body is of cast material.
3. A stud according to claim 1 wherein the body is of compacted metallic powder.
4. A stud according to claim 2 wherein the second metallic portion has a larger mass than the first metallic portion.
5. A stud according to claim 4 wherein the second portion is made of a material different from the material of which the first portion is made.
6. A stud according to claim 1 wherein the height of the stud is such that after stud welding to the metallic surface, the initial height of the stud is in the range of from about 0.1 to about twice the stud diameter.
7. A stud according to claim 6 wherein the initial height of the stud is in the range of from about one-third to about one-half the stud diameter.
8. A stud according to claim 1 wherein the body of abrasion resistant material has an aluminum member secured to the portion of the body to be engaged with the metallic surface.
9. A stud according to claim 1 wherein the body of abrasion resistant material has a mild steel member secured to the portion of the body to be engaged with the metallic surface.
10. A stud according to claim 1 wherein the abrasion resistant material is a steel alloy containing about 4%
carbon and about 33% chromium, the balance being iron.
carbon and about 33% chromium, the balance being iron.
11. A stud according to claim 10 wherein the body of abrasion resistant material has an aluminum member secured to the portion of the body to be engaged with the metallic surface.
12. A stud according to claim 10 wherein the body of abrasion resistant material has a mild steel member secured to the portion of the body to be engaged with the metallic surface.
13. A stud according to claim 1 wherein the abrasion resistant material comprises a chromium steel alloy.
14. A stud according to claim 13 wherein the body of abrasion resistant material has an aluminum member secured to the portion of the body to be engaged with the metallic surface
15. An abrasion-resistant stud moulded from a weldable abrasion-resistant alloy and containing at least one metallic carbide, the configuration of the stud being adapted for rapid welding of one end of the stud onto a substantially locally planar metallic substrate.
16. The stud of claim 15 wherein said alloy includes chromium and carbon in the form of chromium carbide.
17. The stud of claim 16 wherein the ratio of chromium to carbon is about 7 or 8 to 1.
18. The stud of claim 15 wherein the alloy includes one or more intermediate carbides.
19. The stud of claim 15 wherein said alloy com-prises from 4 percent to 40 percent precipitated chromium carbides.
20. The stud of claim 19 wherein the ratio of chromium to carbon is about 7 or 8 to 1.
21. The stud of claim 15 wherein said stud has a generally cylindrical configuration and has upper and lower portions.
22. The stud of claim 21 wherein said stud has an outer generally annular recess intermediate the ends of said stud and generally parallel to the end face of said upper portion.
23. The stud of claims 21 or 22 including a flux material secured near the end of said lower portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000383888A CA1209175A (en) | 1979-03-20 | 1981-08-14 | Method of protecting a metallic surface susceptible to abrasion by rock like material |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7909826 | 1979-03-20 | ||
| GB7909826 | 1979-03-20 | ||
| CA000347204A CA1208256A (en) | 1979-03-20 | 1980-03-07 | Method of protecting a metallic surface susceptible to abrasion by rock-like material |
| CA000383888A CA1209175A (en) | 1979-03-20 | 1981-08-14 | Method of protecting a metallic surface susceptible to abrasion by rock like material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1209175A true CA1209175A (en) | 1986-08-05 |
Family
ID=25669051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000383888A Expired CA1209175A (en) | 1979-03-20 | 1981-08-14 | Method of protecting a metallic surface susceptible to abrasion by rock like material |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1209175A (en) |
-
1981
- 1981-08-14 CA CA000383888A patent/CA1209175A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1208256A (en) | Method of protecting a metallic surface susceptible to abrasion by rock-like material | |
| CA1043325A (en) | Hard surfaced well tool and method of making same | |
| US6799385B2 (en) | Abrasion resistant earth working surface and weld stud | |
| US5852272A (en) | Wear-resistant overlay forming method and wear-resistant composite members | |
| US5261763A (en) | Tamping tool | |
| US20130094900A1 (en) | Hardfacing alloy, methods, and products thereof | |
| US4837417A (en) | Method of hard-facing a metal surface | |
| US5210965A (en) | Fabricated bucket tooth | |
| CA1209175A (en) | Method of protecting a metallic surface susceptible to abrasion by rock like material | |
| US4745254A (en) | Method of hard-facing a metal surface | |
| AU636002B2 (en) | Wear strips | |
| CA2047838C (en) | Process for the point-welding a highly corrosion resistant metal cover plate on a metal support | |
| CA1177124A (en) | Studs of abrasion resistant metallic material | |
| GB2047593A (en) | A method of protecting a metallic surface susceptible to abrasion by rock-like material | |
| US5619810A (en) | Pin retention device and related method for retaining a trunnion link pin in a digging implement | |
| US4905386A (en) | Process for unearthing hazardous pipeline | |
| GB2277047A (en) | Arc shields | |
| JPS6058691B2 (en) | Wear-resistant composite components | |
| Gregory | Hardfacing | |
| AU741560B2 (en) | Wear protection device | |
| JP2554581B2 (en) | Welding method for aluminum materials | |
| JPS6031594B2 (en) | Repair methods and repair parts for parts of high hardness materials that require wear resistance such as equipment and machinery | |
| JPH0699299A (en) | Welding reinforcing method for machinery and appliance and reinforcing patch used therefor | |
| AU2002320733B2 (en) | Improvements in Adaptor Parts for Ground Engaging Elements | |
| JPH07144276A (en) | Method for working wear-resistant stud |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |