GB369918A - Improvements in or relating to the treatment of steel alloys - Google Patents

Improvements in or relating to the treatment of steel alloys

Info

Publication number
GB369918A
GB369918A GB3496930A GB3496930A GB369918A GB 369918 A GB369918 A GB 369918A GB 3496930 A GB3496930 A GB 3496930A GB 3496930 A GB3496930 A GB 3496930A GB 369918 A GB369918 A GB 369918A
Authority
GB
United Kingdom
Prior art keywords
per cent
ammonia
heated
heating
steel alloys
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
GB3496930A
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.)
WILFRED JOHN DAWSON
Original Assignee
WILFRED JOHN DAWSON
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 WILFRED JOHN DAWSON filed Critical WILFRED JOHN DAWSON
Priority to GB3496930A priority Critical patent/GB369918A/en
Publication of GB369918A publication Critical patent/GB369918A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C23C8/06—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 using gases
    • C23C8/08—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 using gases only one element being applied
    • C23C8/24—Nitriding
    • C23C8/26—Nitriding of ferrous surfaces

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Catalysts (AREA)

Abstract

Steel alloys containing 9-17 per cent of manganese, 2,5-10 per cent of nickel, and up to 1 per cent of carbon, and if desired from 0,1 to 10 per cent of one or more additional elements such as silicon, chromium, tungsten, aluminium, copper, molybdenum, cobalt, vanadium, titanium, or zirconium are nitrogenized by heating at a temperature from 500 or 550 DEG C and upwards to 650-680 DEG C. in the presence of ammonia or a substance from which ammonia is evolved when heated. The heating may be carried at one or different temperatures. Before the nitrogenization, the alloys are toughened by heating to 900-1000 DEG C. and quenched. In an example, an alloy containing 0,71 per cent of carbon, 1,27 of silicon, 12,8 of manganese, 0,15 of chromium, 2,83 of nickel, and 0,18 of copper was first heated to 1000 DEG C. and cooled in air. The alloy was then heated for 48 hours in ammonia at 530-595 DEG C. of which 40 hours were at 560-585 DEG C.
GB3496930A 1930-11-20 1930-11-20 Improvements in or relating to the treatment of steel alloys Expired GB369918A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3496930A GB369918A (en) 1930-11-20 1930-11-20 Improvements in or relating to the treatment of steel alloys

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3496930A GB369918A (en) 1930-11-20 1930-11-20 Improvements in or relating to the treatment of steel alloys

Publications (1)

Publication Number Publication Date
GB369918A true GB369918A (en) 1932-03-21

Family

ID=10372242

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3496930A Expired GB369918A (en) 1930-11-20 1930-11-20 Improvements in or relating to the treatment of steel alloys

Country Status (1)

Country Link
GB (1) GB369918A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2745777A (en) * 1951-12-20 1956-05-15 Armco Steel Corp Internal combustion engine valves and the like
DE1217075B (en) * 1959-07-15 1966-05-18 Universal Cyclops Steel Corp Austenitic hardenable steel alloy
US4377422A (en) * 1980-09-12 1983-03-22 Queen's University At Kingston Hadfield's steel containing 2% vanadium

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2745777A (en) * 1951-12-20 1956-05-15 Armco Steel Corp Internal combustion engine valves and the like
DE1217075B (en) * 1959-07-15 1966-05-18 Universal Cyclops Steel Corp Austenitic hardenable steel alloy
US4377422A (en) * 1980-09-12 1983-03-22 Queen's University At Kingston Hadfield's steel containing 2% vanadium

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