US3589876A - Built up strip mill guide of composite copper alloy layers - Google Patents

Built up strip mill guide of composite copper alloy layers Download PDF

Info

Publication number
US3589876A
US3589876A US803295*A US3589876DA US3589876A US 3589876 A US3589876 A US 3589876A US 3589876D A US3589876D A US 3589876DA US 3589876 A US3589876 A US 3589876A
Authority
US
United States
Prior art keywords
guide
strip mill
built
tin
lead
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 - Lifetime
Application number
US803295*A
Inventor
Grant A Oakes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3589876A publication Critical patent/US3589876A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/14—Guiding, positioning or aligning work
    • B21B39/16—Guiding, positioning or aligning work immediately before entering or after leaving the pass
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/02—Alloys based on copper with tin as the next major constituent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12701—Pb-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12903—Cu-base component
    • Y10T428/1291—Next to Co-, Cu-, or Ni-base component

Definitions

  • a strip mill guide such as positioned between the stands of rolls in a rolling mill and particularly adjacent the stands of rolls so as to suitably guide the traveling" 'strip relative thereto is disclosed having an elongated central area built up with a tin lead copper alloy characterized by its ability to prevent dendritic grain structure forming in the guide body and thereby strengthen the same so as to provide a greatly increased life.
  • a built up strip mill guide is normally formed of a bronze alloy which is relatively softer than the steel directed to the roll stands of the strip mill and is so positioned that the edges of the strip steel being guided thereby engage the longitudinal center sections of the guides themselves.
  • the present invention not only improves the original built up guide particularly with respect to wear characteristics and grain structure but permits the guide to be rebuilt periodically to replace the worn away metal and without adversely affecting the grain structure.
  • FIG. 1 is a perspective view of a built up strip mill guide formed in accordance with this invention.
  • FIG. 2 is a perspective view of a strip mill guide during formation of the built up wearing surface thereof.
  • FIG. 3 is an enlarged cross section on line 3-3 of FIG. 2.
  • FIG. 4 is an enlarged cross section on line 4-4 of FIG. 2.
  • FIG. 5 is an enlarged cross section on line 55 of FIG. 1.
  • a strip mill guide which is of conventional size and shape and in the example chosen for illustration the guide is approximately 33 inches long x 3 /2 inches in width and one inch in thickness. It has a T head at one end, the guide body being indicated by the numeral 10, and the T head being indicated by the numeral 11.
  • the T head is formed with a projecting extension 12 of lesser height than the remainder of the head 11 of the strip mill guides so that it will fit beneath a mounting member in a conventional mounting means positioned along side the pass line of a strip mill, for example, and adjacent a stand of reducing rolls therein.
  • the opposite end of the strip mill guide 10 has an angular end portions 13 and 14 which angle toward one another and terminate with a relatively narrow end portion 15.
  • the strip mill guide is in condition for installation in the guide means of a strip mill.
  • FIG. 2 of the drawings the same strip mill guide will be seen in perspective elevation with a longitudinally extending groove 16 therein and which groove 16 extends from the end portion 15 to the T head portion 11 and the projecting extension 12 as heretofore referred to.
  • the groove 16 is formed in the strip mill guide body 10 and filled in with a nickel tin lead copper alloy as seen in FIG. 2 and indicated by the numeral 17.
  • the alloy 17 is provided by a welding rod 18 which is shown in FIG. 2 of the drawings in welding position flowing the metal thereof into the groove 16.
  • An electric arc torch 19 is used as will be understood by those skilled in the art.
  • the conventional strip mill guide 10 is copper, 10% tin and 10% lead and has a normal fine grain structure which forms a suitable supporting body for the built up section formed therein by this invention.
  • the alloy of the rod 18 shown flowing into the groove 16 is high in lead and tin and preferably includes a small amount of nickel.
  • An alloy consisting of 64% copper, 20% lead, 15% tin and 1% nickel is suitable.
  • the lead may be present in the alloy in percentages running from 11% to 45%.
  • the tin may be from 11% to 30% of the alloy and the balance copper except for the nickel which can be present in percentages from 1% and under some conditions may be eliminated, such as where the lead and tin content are very high.
  • the heat necessary to weld the metal in the groove 16 is sufficient to remove or relocate the tin and lead of the strip mill guide 10 whereupon dendritic growth of the grain structure occurs and which results in an unsatisfactory strip mill guide as it becomes brittle, easily broken and subject of rapid wear.
  • the alloy disclosed here in which is high in tin and lead and preferably has nickel as a stabilizer the heretofore believed normal migration of the tin and lead is prevented and no dendritic grain structure growth occurs.
  • the primary reason for the dendritic grain growth in a bronze alloy strip mill guide is the migration of the lead and tin constituents thereof to the last heat affected zone which comprises the areas in the guide body away from the weld area in which the alloy 17 is being deposited.
  • the lead and tin constituents of the bronze alloy of the strip mill guide body 10 move into the areas away from the weld towards the center of the guide leaving the areas adjacent the weld relative- 1y free of lead and tin and thus accelerating the dendritic grain structure which leads to the failure of the strip mill guide as it becomes brittle, easily broken and is subject to rapid wear.
  • strip mill guides can be rebuilt by rewelding a number of times as the initial wearing away of the first deposited weld area makes it possible to reweld and rebuild the guide while maintaining the alloy of the guide in its normal non-brittle state.
  • the built up strip mill guide disclosed herein comprises an improvement in the art and makes possible the reuse by rebuilding of strip mill guides and permits their continuous use through a series of rebuilding operations, none of which adversely affect the grain structure of the original guide body.
  • a guide for traveling strips in a strip mill and the like comprising an elongated member consisting essentially of 80% copper, 10% lead and 10% tin and having a longitudinally extending wear area of an alloy consisting essentially of copper in an amount between and 77%, lead in an amount between 11% and and tin in an amount between 11% and 30%, said wear area being integrally welded to said guide.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)

Abstract

A STRIP MILL GUIDE SUCH AS POSITIONED BETWEEN THE STANDS OF ROLLS IN A ROLLING MILL AND PARTICULARLY ADJACENT THE STANDS OF ROLLS SO AS TO SUITABLY GUIDE THE TRAVELING STRIP RELATIVE THERETO IS DISCLOSED HAVING AN ELONGATED CENTRAL AREA BUILT UP WITH A TIN LEAD COPPER ALLOY CHARACTERIZED BY ITS ABILITY TO PREVENT DENTRIFIC GRAIN STRUC-

TURE FORMING IN THE GUIDE BODY AND THEREBY STRENGTHEN THE SAME SO AS TO PROVIDE A GREATLY INCREASED LIFE.

Description

Jung 29, 1971 CAKES 3,589,876
BUILT UP STRIP MILL GUIDE OF COMPOSITE COPPER ALLOY LAYERS Filed Feb. 28, 1969 IN VENTOR.
Grani A. Oakes AT; OPNEY United States Patent Oflice Patented June 29, 1971 U.S. Cl. 29-199 4 Claims ABSTRACT OF THE DISCLOSURE A strip mill guide such as positioned between the stands of rolls in a rolling mill and particularly adjacent the stands of rolls so as to suitably guide the traveling" 'strip relative thereto is disclosed having an elongated central area built up with a tin lead copper alloy characterized by its ability to prevent dendritic grain structure forming in the guide body and thereby strengthen the same so as to provide a greatly increased life.
BACKGROUND OF THE INVENTION (1) Field of the invention This invention relates to strip mill guides of the type normally employed to guide the edges of strip between the stands of a rolling mill.
(2) Description of the prior art Prior structures of this type are those found in my Pats. 3,289,457 and 3,289,292 in which built up strip mill guide and the method of making the same are disclosed. The inventions set forth in these patents have been widely commercially adopted by the steel industry and such built up strip mill guides have been reworked according to the inventions and found'to progessively lose their desirable qualities through the reworking operations. The present invention overcomes the difficulties by changing the tin and lead content of the alloying material used in the built up guide to a point where the metal of the guide itself is saturated with the tin and lead sufiiciently to prevent dendritic grain structure from occurring. Strip mill guides formed in accordance with the present invention may be reworked and found to be improved in their life span characteristics and wearing ability.
SUMMARY OF THE INVENTION A built up strip mill guide is normally formed of a bronze alloy which is relatively softer than the steel directed to the roll stands of the strip mill and is so positioned that the edges of the strip steel being guided thereby engage the longitudinal center sections of the guides themselves. By building up the elongated central wear section of the strip mill guide with a copper alloy having a relatively high percentage of tin and lead, a guide is provided which improves in the rebuilding operation particularly with respect to the grain structure of the guide. In the past the grain structure has shown abnormal dendritic growth upon attempts to rebuild the guide structures.
The present invention not only improves the original built up guide particularly with respect to wear characteristics and grain structure but permits the guide to be rebuilt periodically to replace the worn away metal and without adversely affecting the grain structure.
DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a built up strip mill guide formed in accordance with this invention.
FIG. 2 is a perspective view of a strip mill guide during formation of the built up wearing surface thereof.
FIG. 3 is an enlarged cross section on line 3-3 of FIG. 2.
FIG. 4 is an enlarged cross section on line 4-4 of FIG. 2.
FIG. 5 is an enlarged cross section on line 55 of FIG. 1.
DESCRIPTION OF THE PREFERRED EMBODIMENT By referring to the drawings and FIG. 1 in particular it will be seen that a strip mill guide has been disclosed which is of conventional size and shape and in the example chosen for illustration the guide is approximately 33 inches long x 3 /2 inches in width and one inch in thickness. It has a T head at one end, the guide body being indicated by the numeral 10, and the T head being indicated by the numeral 11. The T head is formed with a projecting extension 12 of lesser height than the remainder of the head 11 of the strip mill guides so that it will fit beneath a mounting member in a conventional mounting means positioned along side the pass line of a strip mill, for example, and adjacent a stand of reducing rolls therein.
The opposite end of the strip mill guide 10 has an angular end portions 13 and 14 which angle toward one another and terminate with a relatively narrow end portion 15.
As seen in FIG. 1 of the drawings the strip mill guide is in condition for installation in the guide means of a strip mill.
By referring to FIG. 2 of the drawings, the same strip mill guide will be seen in perspective elevation with a longitudinally extending groove 16 therein and which groove 16 extends from the end portion 15 to the T head portion 11 and the projecting extension 12 as heretofore referred to. The groove 16 is formed in the strip mill guide body 10 and filled in with a nickel tin lead copper alloy as seen in FIG. 2 and indicated by the numeral 17.
The alloy 17 is provided by a welding rod 18 which is shown in FIG. 2 of the drawings in welding position flowing the metal thereof into the groove 16. An electric arc torch 19 is used as will be understood by those skilled in the art. The conventional strip mill guide 10 is copper, 10% tin and 10% lead and has a normal fine grain structure which forms a suitable supporting body for the built up section formed therein by this invention. The alloy of the rod 18 shown flowing into the groove 16 is high in lead and tin and preferably includes a small amount of nickel. An alloy consisting of 64% copper, 20% lead, 15% tin and 1% nickel is suitable. The lead may be present in the alloy in percentages running from 11% to 45%. The tin may be from 11% to 30% of the alloy and the balance copper except for the nickel which can be present in percentages from 1% and under some conditions may be eliminated, such as where the lead and tin content are very high.
Those skilled in the art will observe that the heat necessary to weld the metal in the groove 16 is sufficient to remove or relocate the tin and lead of the strip mill guide 10 whereupon dendritic growth of the grain structure occurs and which results in an unsatisfactory strip mill guide as it becomes brittle, easily broken and subject of rapid wear. By utilizing the alloy disclosed here in which is high in tin and lead and preferably has nickel as a stabilizer, the heretofore believed normal migration of the tin and lead is prevented and no dendritic grain structure growth occurs.
Those skilled in the art will recognize that the primary reason for the dendritic grain growth in a bronze alloy strip mill guide is the migration of the lead and tin constituents thereof to the last heat affected zone which comprises the areas in the guide body away from the weld area in which the alloy 17 is being deposited. In other words, the lead and tin constituents of the bronze alloy of the strip mill guide body 10 move into the areas away from the weld towards the center of the guide leaving the areas adjacent the weld relative- 1y free of lead and tin and thus accelerating the dendritic grain structure which leads to the failure of the strip mill guide as it becomes brittle, easily broken and is subject to rapid wear. By utilizing the alloy hereinbefore specified in the build up Welding and rewelding of the critical area of the guide, saturation of the guide metal by the migration of the lead and tin of the alloy inhibit the dendritic growth and thus maintain the strip mill guide in desirable condition.
The importance of the present invention will be recognized by the fact that the strip mill guides can be rebuilt by rewelding a number of times as the initial wearing away of the first deposited weld area makes it possible to reweld and rebuild the guide while maintaining the alloy of the guide in its normal non-brittle state.
It will thus be seen that the built up strip mill guide disclosed herein comprises an improvement in the art and makes possible the reuse by rebuilding of strip mill guides and permits their continuous use through a series of rebuilding operations, none of which adversely affect the grain structure of the original guide body.
Although but one embodiment of the present invention has been illustrated and described, it will be apparent 4 to those skilled in the art that various changes and modifications may be made therein without departing from the spirit of the invention.
I claim:
1. A guide for traveling strips in a strip mill and the like comprising an elongated member consisting essentially of 80% copper, 10% lead and 10% tin and having a longitudinally extending wear area of an alloy consisting essentially of copper in an amount between and 77%, lead in an amount between 11% and and tin in an amount between 11% and 30%, said wear area being integrally welded to said guide.
2. The guide set forth in claiml and wherein the copper amounts to the lead to 20% and the tin to 15%.
3. The guide of claim 2 wherein the copper is reduced to 64% and nickel is present in the amount of 1%.
4. The guide of claim 1 and wherein nickel is included in an amount between 1% and 4% of the total alloy.
References Cited UNITED STATES PATENTS HYLAND BIZOT, Primary Examiner
US803295*A 1969-02-28 1969-02-28 Built up strip mill guide of composite copper alloy layers Expired - Lifetime US3589876A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US80329569A 1969-02-28 1969-02-28

Publications (1)

Publication Number Publication Date
US3589876A true US3589876A (en) 1971-06-29

Family

ID=25186150

Family Applications (1)

Application Number Title Priority Date Filing Date
US803295*A Expired - Lifetime US3589876A (en) 1969-02-28 1969-02-28 Built up strip mill guide of composite copper alloy layers

Country Status (1)

Country Link
US (1) US3589876A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4686345A (en) * 1985-06-10 1987-08-11 Oakes Grant A Method of rebuilding a strip mill guide

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4686345A (en) * 1985-06-10 1987-08-11 Oakes Grant A Method of rebuilding a strip mill guide

Similar Documents

Publication Publication Date Title
DE69624676T2 (en) ROLLER FOR THE RECORDING DEVICE OF A HOT ROLLING MILL
ES481645A1 (en) Process for manufacturing composite strips by continuous casting and the strips obtained by the process.
CN101190482A (en) Solid wire
KR20080055663A (en) Gas-shielded arc welding method
DE2000037C3 (en) Fusion welding process with a shielded arc and bare, current-carrying strip electrodes arranged one behind the other in the welding direction
EP3225346A1 (en) ARC WELDING METHOD FOR Zn PLATED STEEL SHEET AND ARC WELDED JOINT
US3589876A (en) Built up strip mill guide of composite copper alloy layers
US3719790A (en) Composition and method for forming a weld-surfaced alloyed steel layer of steel
DE2510041C2 (en) Endless casting belt with a non-stick layer for continuous casting machines
DE1814112A1 (en) Hard facing of rollers for hot and cold - rolling of steel and non iron metals
US3834878A (en) Stainless steel
JPH024364B2 (en)
US2079483A (en) Welding rod
JPH05337690A (en) Flux cored wire for submerged arc welding having excellent wear resistance and bead mark resistance
US4686345A (en) Method of rebuilding a strip mill guide
US3078363A (en) Weld strip
US3289457A (en) Built-up strip mill guide
JP2010029916A (en) SPOT WELDING METHOD OF Sn-BASED PLATED STEEL PLATE
US3289292A (en) Built-up strip mill guide
US2984901A (en) Method of making composite metal strips
JPH038863B2 (en)
DE641323C (en) Process for the production of multilayer metals from several, primarily two metals of very different extensibility or machinability and hardness
US2284240A (en) Rail for overhead monorail carrier systems
US3589875A (en) Slipper bearing
DE10134074C1 (en) Casting roller used for casting molten metal, especially molten steel, comprises a metallic rolling body having a metallic layer which is harder than the material of the rolling body