GB435316A - Improvements relating to the production of cast iron castings surface hardened or hardenable by the nitrogen hardening process - Google Patents

Improvements relating to the production of cast iron castings surface hardened or hardenable by the nitrogen hardening process

Info

Publication number
GB435316A
GB435316A GB857934A GB857934A GB435316A GB 435316 A GB435316 A GB 435316A GB 857934 A GB857934 A GB 857934A GB 857934 A GB857934 A GB 857934A GB 435316 A GB435316 A GB 435316A
Authority
GB
United Kingdom
Prior art keywords
castings
production
chromium
aluminium
nickel
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
GB857934A
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.)
Bradley & Foster Ltd
Original Assignee
Bradley & Foster 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 Bradley & Foster Ltd filed Critical Bradley & Foster Ltd
Priority to GB857934A priority Critical patent/GB435316A/en
Publication of GB435316A publication Critical patent/GB435316A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • 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
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

In the production of nitrogen hardenable cast iron alloy castings containing silicon, aluminium and chromium with or without other constituents such as nickel, molybdenum, copper or titanium, the castings are produced in a sand mould, and the alloy contains 2,5-4,0 per cent of carbon, silicon up to 1, 0,3-1,75 of aluminium, and 0,5-2,0 of chromium, the percentage of aluminium varying inversely with the total percentage of silicon nickel or other graphitizing elements and the percentage of chromium varying directly with the graphitizing elements so as to result in the production of a casting which either in the as-cast condition or after a short annealing is devoid of carbon in the graphitic form. The content or combined content of nickel, molybdenum copper or titanium is not in excess of 3 per cent. Prior to nitrogenizing, the castings are annealed at 850-1050 DEG C. followed by slow cooling or are hardened by quenching from 800-875 DEG C. in an oil bath or bath of molten salts at 150-200 DEG C. and then reheated to 700-750 DEG C. The castings may also be malleabilized. The castings may be nitrogenized by heating to 450-650 DEG C. in ammonia gas.
GB857934A 1934-03-19 1934-03-19 Improvements relating to the production of cast iron castings surface hardened or hardenable by the nitrogen hardening process Expired GB435316A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB857934A GB435316A (en) 1934-03-19 1934-03-19 Improvements relating to the production of cast iron castings surface hardened or hardenable by the nitrogen hardening process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB857934A GB435316A (en) 1934-03-19 1934-03-19 Improvements relating to the production of cast iron castings surface hardened or hardenable by the nitrogen hardening process

Publications (1)

Publication Number Publication Date
GB435316A true GB435316A (en) 1935-09-19

Family

ID=9855180

Family Applications (1)

Application Number Title Priority Date Filing Date
GB857934A Expired GB435316A (en) 1934-03-19 1934-03-19 Improvements relating to the production of cast iron castings surface hardened or hardenable by the nitrogen hardening process

Country Status (1)

Country Link
GB (1) GB435316A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004010917A1 (en) 2004-03-05 2005-09-22 Federal-Mogul Burscheid Gmbh Cast iron material with lamellar graphite formation used in making suspension seals comprises carbon, silicon, aluminum, manganese, sulfur, chromium, copper, tin, nitrogen and iron
DE102004010916A1 (en) * 2004-03-05 2005-09-22 Federal-Mogul Burscheid Gmbh Cast iron material with lamellar-, vermicular- or globular graphite formation used in making e.g. cylinder sleeves comprises carbon, silicon, aluminum and iron
CN113087542A (en) * 2021-04-12 2021-07-09 马鞍山市绿科环保科技有限公司 High-hardness sound-insulation brick produced by using casting waste sand and preparation method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004010917A1 (en) 2004-03-05 2005-09-22 Federal-Mogul Burscheid Gmbh Cast iron material with lamellar graphite formation used in making suspension seals comprises carbon, silicon, aluminum, manganese, sulfur, chromium, copper, tin, nitrogen and iron
DE102004010916A1 (en) * 2004-03-05 2005-09-22 Federal-Mogul Burscheid Gmbh Cast iron material with lamellar-, vermicular- or globular graphite formation used in making e.g. cylinder sleeves comprises carbon, silicon, aluminum and iron
DE102004010917B4 (en) 2004-03-05 2008-11-20 Federal-Mogul Burscheid Gmbh Cast iron material with high strength
DE102004010917C5 (en) * 2004-03-05 2018-05-17 Federal-Mogul Burscheid Gmbh Cast iron material with high strength
CN113087542A (en) * 2021-04-12 2021-07-09 马鞍山市绿科环保科技有限公司 High-hardness sound-insulation brick produced by using casting waste sand and preparation method thereof

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