GB2106430A - Stainless steel sheet or strip - Google Patents

Stainless steel sheet or strip Download PDF

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Publication number
GB2106430A
GB2106430A GB08224535A GB8224535A GB2106430A GB 2106430 A GB2106430 A GB 2106430A GB 08224535 A GB08224535 A GB 08224535A GB 8224535 A GB8224535 A GB 8224535A GB 2106430 A GB2106430 A GB 2106430A
Authority
GB
United Kingdom
Prior art keywords
strip
shot
sheet
stainless steel
grit
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.)
Withdrawn
Application number
GB08224535A
Inventor
Peter Geoffrey Stone
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.)
British Steel Corp
Original Assignee
British Steel Corp
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 British Steel Corp filed Critical British Steel Corp
Priority to GB08224535A priority Critical patent/GB2106430A/en
Publication of GB2106430A publication Critical patent/GB2106430A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C11/00—Selection of abrasive materials or additives for abrasive blasts

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

A stainless steel sheet or strip is printed with a patterned surface by means of a blast of abrasive material directed at its surface. The abrasive material may comprise sand, metallic grit, shot or glass beads and projected by a wheel, air, water, oil or dilute acid.

Description

SPECIFICATION Stainless steel sheet or strip This invention relates to stainless steel sheet or strip.
Stainless steel sheet is used in substantial quantities for architectural and building purposes, e.g. for cladding buildings and other internally or externally exposed structures and in public amenities such as bus shelters, toilets etc. and there is frequently a need for a distinctive surface finish which after ageing or being defaced may be readily refurbished.
It is an object of this invention to meet this need.
The present invention provides in one aspect stainless steel sheet or strip having a sand, grit, glass or shot blasted surface.
In another aspect, the invention provides a method of producing a sheet or strip of stainless steel which includes the step of directing a blast of glass shot sand, grit or ferrous shot onto one or both surfaces of the sheet or strip to produce a pattern thereon.
Accordingly, a durable, aesthetically pleasing patterned or plain surface may be produced in this fashion but one of the principal advantages is that the surface is vandal resistant in the sense that any graffiti or superficial marking may readily be removed locally by subjecting the defaced surface to the original blast treatment in situ by using portable equipment, thus reproducing the original finish.
Typically, the blast medium may comprise (a) Expendable slag abrasive (alternative to sand). Particle sizes may for example be in the range 0.2 mm to 2.0 mm in diameter.
(b) Metallic grit with sizes typically in the range G07 to G 12 (BS 2451:1 963).
(c) Steel or iron shot with sizes typically in the range S070 to S120 (BS 2451:1963).
(d) Glass beads or shot with sizes up to 500 microns and typically in the range 50 to 200 microns.
In general, the finer abrasives are preferred since they produce minimum distortion of the surface -- shot, for example, imparts much more energy into the surface-and could under some conditions produce problems in distorting the surface.
As mentioned the blasting may be effected to produce a pattern and this may conveniently be done by using a multi-headed gun, which, whilst traversing the surface, may itself either be stationary or rotating. The various nozzles may project particles of different sizes.
After blasting, e.g. with an air carrier, the surfaces will require washing with water to remove dust. Scrubbing or washing with dilute nitric acid may also be considered to clean and passivate the surfaces. In this regard, dilute acid cleaning may be particularly necessary after blasting with steel or iron shot or grit to remove any ferrous particles lodged in the surface and prevent rust staining.
To avoid rust staining and the need for washing, glass beads or shot may be used as the blast medium. Alternatively, the particles may be blasted in a fluid carrier such as water or oil mixtures or even in the dilute acid itself. In yet another alternative, the blasting may be effected pneumatically or mechanically, in the latter case the particles being projected from a spinning disc or wheel.
The original surface treated may be that produced by standard production techniques; as an example, a surface equivalent to say a 2D finish (BS 1449), or better, will be satisfactory although this may be relaxed for coarser grit or heavy shot.
Either one, or both sides of the sheet or strip may be blasted of course.
1. Stainless steel sheet or strip having a sand, grit, glass or shot blasted surface.
2. Method of producing a sheet or strip of stainless steel which includes the step of directing a blast of glass shot sand, grit or ferrous shot onto one or both surfaces of the sheet or strip to produce a pattern thereon.
3. A method as claimed in Claim 2 wherein the blast medium comprises expandable slag abrasive having a particle size not greater than 2.0 mm in diameter.
4. A method as claimed in Claim 2 wherein the blast medium comprises metallic grit of particle size in the range G07 to G12.
5. A method as claimed in Claim 2 wherein the blast medium comprises ferrous shot having a size typically in the range S070 to S120.
6. A method as claimed in Claim 2 wherein the blast medium comprises glass beads.
7. A method as claimed in any one of Claims 2 to 6 wherein the blast medium is projected onto a surface of a sheet or strip in a fluid carrier comprising air or water or oil or dilute nitric acid.
8. A method as claimed in any one of Claims 2 to 6 wherein the blast medium is projected onto a surface of a strip or sheet mechanically by means of a spinning disc or wheel.
9. A method of producing a sheet or strip of stainless steel with a patterned surface substantially as herein described.
10. Stainless steel sheet or strip whose surface finish is produced by directing a blast of abrasive material at it.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (10)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Stainless steel sheet or strip This invention relates to stainless steel sheet or strip. Stainless steel sheet is used in substantial quantities for architectural and building purposes, e.g. for cladding buildings and other internally or externally exposed structures and in public amenities such as bus shelters, toilets etc. and there is frequently a need for a distinctive surface finish which after ageing or being defaced may be readily refurbished. It is an object of this invention to meet this need. The present invention provides in one aspect stainless steel sheet or strip having a sand, grit, glass or shot blasted surface. In another aspect, the invention provides a method of producing a sheet or strip of stainless steel which includes the step of directing a blast of glass shot sand, grit or ferrous shot onto one or both surfaces of the sheet or strip to produce a pattern thereon. Accordingly, a durable, aesthetically pleasing patterned or plain surface may be produced in this fashion but one of the principal advantages is that the surface is vandal resistant in the sense that any graffiti or superficial marking may readily be removed locally by subjecting the defaced surface to the original blast treatment in situ by using portable equipment, thus reproducing the original finish. Typically, the blast medium may comprise (a) Expendable slag abrasive (alternative to sand). Particle sizes may for example be in the range 0.2 mm to 2.0 mm in diameter. (b) Metallic grit with sizes typically in the range G07 to G 12 (BS 2451:1 963). (c) Steel or iron shot with sizes typically in the range S070 to S120 (BS 2451:1963). (d) Glass beads or shot with sizes up to 500 microns and typically in the range 50 to 200 microns. In general, the finer abrasives are preferred since they produce minimum distortion of the surface -- shot, for example, imparts much more energy into the surface-and could under some conditions produce problems in distorting the surface. As mentioned the blasting may be effected to produce a pattern and this may conveniently be done by using a multi-headed gun, which, whilst traversing the surface, may itself either be stationary or rotating. The various nozzles may project particles of different sizes. After blasting, e.g. with an air carrier, the surfaces will require washing with water to remove dust. Scrubbing or washing with dilute nitric acid may also be considered to clean and passivate the surfaces. In this regard, dilute acid cleaning may be particularly necessary after blasting with steel or iron shot or grit to remove any ferrous particles lodged in the surface and prevent rust staining. To avoid rust staining and the need for washing, glass beads or shot may be used as the blast medium. Alternatively, the particles may be blasted in a fluid carrier such as water or oil mixtures or even in the dilute acid itself. In yet another alternative, the blasting may be effected pneumatically or mechanically, in the latter case the particles being projected from a spinning disc or wheel. The original surface treated may be that produced by standard production techniques; as an example, a surface equivalent to say a 2D finish (BS 1449), or better, will be satisfactory although this may be relaxed for coarser grit or heavy shot. Either one, or both sides of the sheet or strip may be blasted of course. CLAIMS
1. Stainless steel sheet or strip having a sand, grit, glass or shot blasted surface.
2. Method of producing a sheet or strip of stainless steel which includes the step of directing a blast of glass shot sand, grit or ferrous shot onto one or both surfaces of the sheet or strip to produce a pattern thereon.
3. A method as claimed in Claim 2 wherein the blast medium comprises expandable slag abrasive having a particle size not greater than 2.0 mm in diameter.
4. A method as claimed in Claim 2 wherein the blast medium comprises metallic grit of particle size in the range G07 to G12.
5. A method as claimed in Claim 2 wherein the blast medium comprises ferrous shot having a size typically in the range S070 to S120.
6. A method as claimed in Claim 2 wherein the blast medium comprises glass beads.
7. A method as claimed in any one of Claims 2 to 6 wherein the blast medium is projected onto a surface of a sheet or strip in a fluid carrier comprising air or water or oil or dilute nitric acid.
8. A method as claimed in any one of Claims 2 to 6 wherein the blast medium is projected onto a surface of a strip or sheet mechanically by means of a spinning disc or wheel.
9. A method of producing a sheet or strip of stainless steel with a patterned surface substantially as herein described.
10. Stainless steel sheet or strip whose surface finish is produced by directing a blast of abrasive material at it.
GB08224535A 1981-08-28 1982-08-26 Stainless steel sheet or strip Withdrawn GB2106430A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08224535A GB2106430A (en) 1981-08-28 1982-08-26 Stainless steel sheet or strip

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8126316 1981-08-28
GB08224535A GB2106430A (en) 1981-08-28 1982-08-26 Stainless steel sheet or strip

Publications (1)

Publication Number Publication Date
GB2106430A true GB2106430A (en) 1983-04-13

Family

ID=26280599

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08224535A Withdrawn GB2106430A (en) 1981-08-28 1982-08-26 Stainless steel sheet or strip

Country Status (1)

Country Link
GB (1) GB2106430A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0638416A1 (en) * 1993-08-12 1995-02-15 Formica Technology Inc. Improved shot peened press plate and method for producing same
EP0661138A1 (en) * 1993-12-18 1995-07-05 Mineralienwerke Kuppenheim GmbH Method for dry cleaning of facades
FR2780327A1 (en) * 1998-06-26 1999-12-31 Dominique Obringer Surface treatment procedure for articles of stainless steel
EP1112814A2 (en) * 2000-01-03 2001-07-04 DECKEL MAHO GmbH Protective cover for machine tools and method of its production
EP1459845A1 (en) * 2003-02-24 2004-09-22 Benoist Girard SAS Surface treatment of metal

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0638416A1 (en) * 1993-08-12 1995-02-15 Formica Technology Inc. Improved shot peened press plate and method for producing same
US5596912A (en) * 1993-08-12 1997-01-28 Formica Technology, Inc. Press plate having textured surface formed by simultaneous shot peening
EP0661138A1 (en) * 1993-12-18 1995-07-05 Mineralienwerke Kuppenheim GmbH Method for dry cleaning of facades
FR2780327A1 (en) * 1998-06-26 1999-12-31 Dominique Obringer Surface treatment procedure for articles of stainless steel
EP1112814A2 (en) * 2000-01-03 2001-07-04 DECKEL MAHO GmbH Protective cover for machine tools and method of its production
EP1112814A3 (en) * 2000-01-03 2001-10-10 DECKEL MAHO GmbH Protective cover for machine tools and method of its production
EP1459845A1 (en) * 2003-02-24 2004-09-22 Benoist Girard SAS Surface treatment of metal

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)