GB862282A - A process for the manufacture of metal articles involving die stamping - Google Patents

A process for the manufacture of metal articles involving die stamping

Info

Publication number
GB862282A
GB862282A GB3515359A GB3515359A GB862282A GB 862282 A GB862282 A GB 862282A GB 3515359 A GB3515359 A GB 3515359A GB 3515359 A GB3515359 A GB 3515359A GB 862282 A GB862282 A GB 862282A
Authority
GB
United Kingdom
Prior art keywords
chromium
blanks
box
die stamping
powder
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
Application number
GB3515359A
Inventor
Cyril Wick
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.)
CHROME ALLOYING Co Ltd
Original Assignee
CHROME ALLOYING Co Ltd
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 CHROME ALLOYING Co Ltd filed Critical CHROME ALLOYING Co Ltd
Priority to GB3515359A priority Critical patent/GB862282A/en
Publication of GB862282A publication Critical patent/GB862282A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/009—Machines or apparatus for embossing decorations or marks, e.g. embossing coins by multi-step processes
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C1/00—Brooches or clips in their decorative or ornamental aspect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/008—Machines or apparatus for embossing decorations or marks, e.g. embossing coins in layered material; connecting a plurality of layers by embossing
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • C23C10/34—Embedding in a powder mixture, i.e. pack cementation
    • C23C10/36—Embedding in a powder mixture, i.e. pack cementation only one element being diffused
    • C23C10/38—Chromising
    • C23C10/40—Chromising of ferrous surfaces
    • C23C10/42—Chromising of ferrous surfaces in the presence of volatile transport additives, e.g. halogenated substances

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)

Abstract

In making medals, coins &c. involving die stamping, flat mild steel blanks are provided by a halide diffusion process with a ductile iron-chromium alloy layer having a chromium content of 25-30%. Blanks the size and thickness of shillings are packed in a mixture of 65% by weight chromium powder and 35% by weight kaolin in a steel box, a little ammonium iodide is added and the box is sealed. The box is heated for six hours at 1020 DEG C. to coat the blanks with an iron-chromium alloy containing 25% chromium, 0.002 inches thick, or for twelve hours at 1070 DEG C. to produce the alloy layer 0.005 inches thick. Ferrochrome powder may be used instead of chromium powder. Specifications 572,703, 574,737, 575,676, 577,504, 586,241, 586,376 and 646,637 are referred to.
GB3515359A 1959-10-16 1959-10-16 A process for the manufacture of metal articles involving die stamping Expired GB862282A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3515359A GB862282A (en) 1959-10-16 1959-10-16 A process for the manufacture of metal articles involving die stamping

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3515359A GB862282A (en) 1959-10-16 1959-10-16 A process for the manufacture of metal articles involving die stamping

Publications (1)

Publication Number Publication Date
GB862282A true GB862282A (en) 1961-03-08

Family

ID=10374437

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3515359A Expired GB862282A (en) 1959-10-16 1959-10-16 A process for the manufacture of metal articles involving die stamping

Country Status (1)

Country Link
GB (1) GB862282A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0828011A1 (en) * 1996-09-04 1998-03-11 Diffusion Alloys Limited Coinage material and process for production thereof
EP0962544A1 (en) * 1998-05-27 1999-12-08 The Solicitor for the Affairs of Her Majesty's Treasury Layered structures for metallic articles
WO2006024877A1 (en) * 2004-09-03 2006-03-09 Diffusion Alloys Limited Process for the production of coin blanks

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0828011A1 (en) * 1996-09-04 1998-03-11 Diffusion Alloys Limited Coinage material and process for production thereof
EP0962544A1 (en) * 1998-05-27 1999-12-08 The Solicitor for the Affairs of Her Majesty's Treasury Layered structures for metallic articles
WO2006024877A1 (en) * 2004-09-03 2006-03-09 Diffusion Alloys Limited Process for the production of coin blanks

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