GB694595A - Improved process for producing precision castings - Google Patents

Improved process for producing precision castings

Info

Publication number
GB694595A
GB694595A GB461951A GB461951A GB694595A GB 694595 A GB694595 A GB 694595A GB 461951 A GB461951 A GB 461951A GB 461951 A GB461951 A GB 461951A GB 694595 A GB694595 A GB 694595A
Authority
GB
United Kingdom
Prior art keywords
pattern
alloy
metal
chromium
casting
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
GB461951A
Inventor
Cyril Smith
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 Thomson Houston Co Ltd
Original Assignee
British Thomson Houston 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB461951A priority Critical patent/GB694595A/en
Publication of GB694595A publication Critical patent/GB694595A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/02—Lost patterns

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

694,595. Casting composite articles. BRITISH THOMSON-HOUSTON CO., Ltd. Jan. 14, 1952 [Feb. 26, 1951], No. 4619/51. Class 83 (i). Moulding processes.-In a method of precision casting, the pattern consists of a metal or alloy of low-melting point or of a thermoplastic material of similar cooling and setting characteristics and is coated with a thin skin of a metal or metals having a higher melting point than that of the pattern so that after the melting of the pattern the skin remains in the mould to receive the casting metal, for which it provides a protective coating. The skin is wholly or mainly of higher melting point than the cast metal and any part of the skin having a lower melting point is such as to alloy with the casting metal. A pattern of a zinc alloy is made by casting the alloy into a master mould and is then given a thin coating of copper, followed by a heavy coating of chromium. The coated pattern is invested in the mould material, preferably sand rammed and pressed around the pattern. During the baking of the mould, the alloy melts and is run-off, leaving in situ a skin or shell of chromium into which the casting metal, usually steel, is poured or injected. The copper coating serves to bond the chromium and the cast metal to form a chromium-coated article. Chromium coated steel blades for gas turbines may be made by this method. A plastic of the poly-vinylchloride group may be used for the pattern instead of an alloy.
GB461951A 1951-02-26 1951-02-26 Improved process for producing precision castings Expired GB694595A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB461951A GB694595A (en) 1951-02-26 1951-02-26 Improved process for producing precision castings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB461951A GB694595A (en) 1951-02-26 1951-02-26 Improved process for producing precision castings

Publications (1)

Publication Number Publication Date
GB694595A true GB694595A (en) 1953-07-22

Family

ID=9780590

Family Applications (1)

Application Number Title Priority Date Filing Date
GB461951A Expired GB694595A (en) 1951-02-26 1951-02-26 Improved process for producing precision castings

Country Status (1)

Country Link
GB (1) GB694595A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3210692A1 (en) * 2016-02-29 2017-08-30 General Electric Company Casting with metal components and metal skin layers
US20210367490A1 (en) * 2018-04-12 2021-11-25 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method for producing a helical electrically conducting body

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3210692A1 (en) * 2016-02-29 2017-08-30 General Electric Company Casting with metal components and metal skin layers
JP2017154180A (en) * 2016-02-29 2017-09-07 ゼネラル・エレクトリック・カンパニイ Casting with metal components and metal skin layers
US20210367490A1 (en) * 2018-04-12 2021-11-25 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method for producing a helical electrically conducting body

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