GB701912A - Improvements in or relating to iron shot, process of making the same and apparatus for carrying out the process - Google Patents

Improvements in or relating to iron shot, process of making the same and apparatus for carrying out the process

Info

Publication number
GB701912A
GB701912A GB28657/50A GB2865750A GB701912A GB 701912 A GB701912 A GB 701912A GB 28657/50 A GB28657/50 A GB 28657/50A GB 2865750 A GB2865750 A GB 2865750A GB 701912 A GB701912 A GB 701912A
Authority
GB
United Kingdom
Prior art keywords
shot
retort
iron
dry hydrogen
hardness
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
GB28657/50A
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.)
Olin Industries Inc
Original Assignee
Olin Industries Inc
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 Olin Industries Inc filed Critical Olin Industries Inc
Publication of GB701912A publication Critical patent/GB701912A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/14—Treatment of metallic powder
    • B22F1/142—Thermal or thermo-mechanical treatment
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0031—Rotary furnaces with horizontal or slightly inclined axis

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)

Abstract

701,912. Annealing. OLIN INDUSTRIES, Inc. Nov. 23, 1950 [Nov. 30, 1949], No. 28657/50. Class 72 Iron shot composed of substantially pure iron and having a surface hardness of 60-100 D.P.H. and an interior hardness not less than the surface hardness is produced by heating the shot above 1670‹F. but below its melting point and maintaining an atmosphere of hydrogen around the shot during heating, holding at the high temperature and cooling. The grain size of the iron, which should not contain more than 0.145 per cent. of impurities may be larger than A.S.T.M. size 2. As shown, the shot may be introduced into a rotary retort 7 having internal flanges for showering the shot and means for maintaining a steady flow of dry hydrogen therethrough, The retort is then rotated by the motor 19. The air in the retort is removed by nitrogen which is in turn replaced by a steady flow of dry hydrogen. The retort is then moved into a furnace 2 at a temperature of 1675-1800‹F. and held there until the shot has reached the desired hardness and grain size, after which it is withdrawn and allowed to cool while still rotating and being supplied with dry hydrogen.
GB28657/50A 1949-11-30 1950-11-23 Improvements in or relating to iron shot, process of making the same and apparatus for carrying out the process Expired GB701912A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US701912XA 1949-11-30 1949-11-30

Publications (1)

Publication Number Publication Date
GB701912A true GB701912A (en) 1954-01-06

Family

ID=22093718

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28657/50A Expired GB701912A (en) 1949-11-30 1950-11-23 Improvements in or relating to iron shot, process of making the same and apparatus for carrying out the process

Country Status (1)

Country Link
GB (1) GB701912A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2416074A1 (en) * 1978-02-01 1979-08-31 Allibert Andre Rounding and smoothing the ends of fibres - by heating together with auxiliaries preventing their fusing together

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2416074A1 (en) * 1978-02-01 1979-08-31 Allibert Andre Rounding and smoothing the ends of fibres - by heating together with auxiliaries preventing their fusing together

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