GB187310A - Improvements in the manufacture of unstainable steel and iron, or alloys thereof - Google Patents

Improvements in the manufacture of unstainable steel and iron, or alloys thereof

Info

Publication number
GB187310A
GB187310A GB1905221A GB1905221A GB187310A GB 187310 A GB187310 A GB 187310A GB 1905221 A GB1905221 A GB 1905221A GB 1905221 A GB1905221 A GB 1905221A GB 187310 A GB187310 A GB 187310A
Authority
GB
United Kingdom
Prior art keywords
unstainable
alloys
manufacture
decarbonizing
per cent
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
GB1905221A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1905221A priority Critical patent/GB187310A/en
Publication of GB187310A publication Critical patent/GB187310A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
    • C21D3/02—Extraction of non-metals
    • C21D3/04—Decarburising

Abstract

187,310. Aitchison, L. July 14, 1921. Alloys.-Relates to the manufacture of unstainable articles formed from ferrous material containing chromium or nickel or both and consists in forming the articles by casting, rolling or forging from material having the metallic composition of unstainable metal but containing a higher proportion of carbon than is permissible in the finished article and then decarbonizing the whole or part of the surface layer so as to obtain an unstainable surface where required. In an example a ferrous casting containing 12 per cent chromium and 1-5 per cent carbon, after cleaning by sand-blasting or pickling and machining to final dimensions, is heated to a temperature of 1200‹ C. for a period of 10 hours in a container through which a stream of hydrogen is passed and allowed to cool therein. Solid decarbonizing reagents, such as mill-scale or hematite iron ore, may, however, be used.
GB1905221A 1921-07-14 1921-07-14 Improvements in the manufacture of unstainable steel and iron, or alloys thereof Expired GB187310A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1905221A GB187310A (en) 1921-07-14 1921-07-14 Improvements in the manufacture of unstainable steel and iron, or alloys thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1905221A GB187310A (en) 1921-07-14 1921-07-14 Improvements in the manufacture of unstainable steel and iron, or alloys thereof

Publications (1)

Publication Number Publication Date
GB187310A true GB187310A (en) 1922-10-16

Family

ID=10122944

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1905221A Expired GB187310A (en) 1921-07-14 1921-07-14 Improvements in the manufacture of unstainable steel and iron, or alloys thereof

Country Status (1)

Country Link
GB (1) GB187310A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2470988A (en) * 1946-03-15 1949-05-24 Crane Co Method of heat treatment
US2998303A (en) * 1958-08-26 1961-08-29 Midland Ross Corp Method for purifying hydrogen contaminated with methane

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2470988A (en) * 1946-03-15 1949-05-24 Crane Co Method of heat treatment
US2998303A (en) * 1958-08-26 1961-08-29 Midland Ross Corp Method for purifying hydrogen contaminated with methane

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