GB573740A - Method of making seamless tubes of refractory metals and the product thereof - Google Patents

Method of making seamless tubes of refractory metals and the product thereof

Info

Publication number
GB573740A
GB573740A GB1834343A GB1834343A GB573740A GB 573740 A GB573740 A GB 573740A GB 1834343 A GB1834343 A GB 1834343A GB 1834343 A GB1834343 A GB 1834343A GB 573740 A GB573740 A GB 573740A
Authority
GB
United Kingdom
Prior art keywords
core
metal
alloy
tungsten
tube
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
GB1834343A
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.)
CALLITE TUNGSTEN CORP
Original Assignee
CALLITE TUNGSTEN 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 CALLITE TUNGSTEN CORP filed Critical CALLITE TUNGSTEN CORP
Priority to GB1834343A priority Critical patent/GB573740A/en
Publication of GB573740A publication Critical patent/GB573740A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy

Abstract

573,740. Making seamless tubes from powdered metal. NEWTON, E. P. (Callite Tungsten Corporation). Nov, 4, 1943, No. 18343. [Class 82 (i)] [Also in Group XXII] Seamless tubes are made from powdered refractory metals such as tungsten, molybdenum, tantalum and niobium by pressing a layer of the powder in a mould 1 on a support 2 then placing above it a core 5, of some material that will melt at the sintering temperature, for example, a glass rod, and finally adding the remainder of the powder for compression by the side'3 to the amount of from 10 to 20 tons per sq. inch. The compact is removed from the mould, is resistance heated between two electrodes extending parallel' to but on opposite'sides of the core which is arranged vertically. During the sintering, the core runs out and is replaced by a metal core, after which the tube is completed by swaging, rolling or drawing. Electric induction heating may be employed. Borosilicate glasses, quartz, sillimanite, the material known under the Registered Trade Mark " Pyrex," and carborundum may be used. If metal be used as a core, its coefficient of expansion should not exceed that of the tube . metal and it should not alloy with it. For a molybdenum tube, a tungsten core may 'be used, coated with oxide of beryllium, manganesa, zirconium or thorium. In this case, the core remains in place for the final working. Alloy or composite tubes may be made from several of the powders. Alloys of nickel, iron and chromium may be used for cores and particularly the alloy of nickel and steel known under the Registered Trade Mark " Invar."
GB1834343A 1943-11-04 1943-11-04 Method of making seamless tubes of refractory metals and the product thereof Expired GB573740A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1834343A GB573740A (en) 1943-11-04 1943-11-04 Method of making seamless tubes of refractory metals and the product thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1834343A GB573740A (en) 1943-11-04 1943-11-04 Method of making seamless tubes of refractory metals and the product thereof

Publications (1)

Publication Number Publication Date
GB573740A true GB573740A (en) 1945-12-04

Family

ID=10110835

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1834343A Expired GB573740A (en) 1943-11-04 1943-11-04 Method of making seamless tubes of refractory metals and the product thereof

Country Status (1)

Country Link
GB (1) GB573740A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2628166A (en) * 1949-02-28 1953-02-10 Haller John Process of making chambered articles containing a movable element
US2685507A (en) * 1949-03-18 1954-08-03 Michigan Powdered Metal Produc Process of making porous chambered bearing
US2695231A (en) * 1949-04-16 1954-11-23 Michigan Powdered Metal Produc Process of making fluid-permeable article
US2695230A (en) * 1949-01-10 1954-11-23 Michigan Powdered Metal Produc Process of making powdered metal article
US3115408A (en) * 1958-12-22 1963-12-24 Atomic Energy Authority Uk Sintering processes
DE1292799B (en) * 1958-04-21 1969-04-17 Du Pont Process for the production of hollow bodies from powder
EP3210693A1 (en) * 2016-02-29 2017-08-30 General Electric Company Casting with a second metal component formed around a first metal component using hot isostatic pressing

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2695230A (en) * 1949-01-10 1954-11-23 Michigan Powdered Metal Produc Process of making powdered metal article
US2628166A (en) * 1949-02-28 1953-02-10 Haller John Process of making chambered articles containing a movable element
US2685507A (en) * 1949-03-18 1954-08-03 Michigan Powdered Metal Produc Process of making porous chambered bearing
US2695231A (en) * 1949-04-16 1954-11-23 Michigan Powdered Metal Produc Process of making fluid-permeable article
DE1292799B (en) * 1958-04-21 1969-04-17 Du Pont Process for the production of hollow bodies from powder
US3115408A (en) * 1958-12-22 1963-12-24 Atomic Energy Authority Uk Sintering processes
EP3210693A1 (en) * 2016-02-29 2017-08-30 General Electric Company Casting with a second metal component formed around a first metal component using hot isostatic pressing
CN107127346A (en) * 2016-02-29 2017-09-05 通用电气公司 The casting of the second hardware is formed around the first hardware using high temperature insostatic pressing (HIP)
US10343218B2 (en) 2016-02-29 2019-07-09 General Electric Company Casting with a second metal component formed around a first metal component using hot isostactic pressing

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