GB515004A - A method of surface hardening articles of steel - Google Patents

A method of surface hardening articles of steel

Info

Publication number
GB515004A
GB515004A GB14833/38A GB1483338A GB515004A GB 515004 A GB515004 A GB 515004A GB 14833/38 A GB14833/38 A GB 14833/38A GB 1483338 A GB1483338 A GB 1483338A GB 515004 A GB515004 A GB 515004A
Authority
GB
United Kingdom
Prior art keywords
steel
articles
article
surface hardening
hardening temperature
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
GB14833/38A
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.)
Bochumer Verein fuer Gussstahlfabrikation AG
Original Assignee
Bochumer Verein fuer Gussstahlfabrikation AG
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 Bochumer Verein fuer Gussstahlfabrikation AG filed Critical Bochumer Verein fuer Gussstahlfabrikation AG
Publication of GB515004A publication Critical patent/GB515004A/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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/34—Methods of heating
    • C21D1/44—Methods of heating in heat-treatment baths
    • C21D1/48—Metal baths
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

515,004. Surface hardening steel. BOCHUMER VEREIN FUR GUSSSTAHLFABRIKATION AKT.-GES. May 18, 1938, No. 14833. Convention date, June 8, 1937. [Class 72] Steel articles are surface-hardened by immersing them in a metal bath having a melting point which is higher by at least 50 ‹C., than the usual hardening temperature of steel, and when the surface zones have reached the hardening temperature subjecting the articles to accelerated cooling, e.g., by quenching in water, oil or air, the process being carried out in such a manner that no change in the composition of the article takes place and the core of the article is unaffected. The bath may be composed of molten bronze or cast iron.
GB14833/38A 1937-06-08 1938-05-18 A method of surface hardening articles of steel Expired GB515004A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE515004X 1937-06-08

Publications (1)

Publication Number Publication Date
GB515004A true GB515004A (en) 1939-11-23

Family

ID=6548837

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14833/38A Expired GB515004A (en) 1937-06-08 1938-05-18 A method of surface hardening articles of steel

Country Status (1)

Country Link
GB (1) GB515004A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2682685A1 (en) * 1991-10-17 1993-04-23 Creusot Loire Process for the manufacture of a massive steel component such as a thick sheet with a steep hardness gradient along its thickness and thick sheet with a steep hardness gradient

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2682685A1 (en) * 1991-10-17 1993-04-23 Creusot Loire Process for the manufacture of a massive steel component such as a thick sheet with a steep hardness gradient along its thickness and thick sheet with a steep hardness gradient

Similar Documents

Publication Publication Date Title
ES329324A1 (en) Method of production of cast-iron parts with a high coefficient of thermal expansion
GB515004A (en) A method of surface hardening articles of steel
US2924544A (en) Metallurgical process for cold-finishing steel
US1996568A (en) Base metal for vitreous enamel
US2283664A (en) Graphitic steel
US2279935A (en) Vitreous enamel coated steel article and method of making the same
GB680123A (en) Cast iron containing graphite in nodular form and process of making the same
US2289138A (en) Method of hardening steel
US2646375A (en) Process for hardening alloy gray cast iron
US2133532A (en) Thin-walled steel casting and method of making same
US1871545A (en) Method of manufacturing cast iron, and cast iron articles
US2154947A (en) Hardening of metal surfaces
US1960895A (en) Process for preparing metal articles
US2659669A (en) Composition and method for the production of alloys
US1936406A (en) Method for softening cobalt alloy steel
GB350919A (en) Improvements in and relating to a process for manufacturing steel having good machining properties
GB658707A (en) Method of improving magnesium and its alloys
US2024014A (en) Process for improvement of malleable iron castings
US1941671A (en) Ductile cast iron and method of making the same
GB495819A (en) Improvements in or relating to the production of grey cast iron
GB456128A (en) Improvements relating to the hardening of metal surfaces
GB503981A (en) Improvements relating to the manufacture of bearings, axle-boxes and the like
GB187310A (en) Improvements in the manufacture of unstainable steel and iron, or alloys thereof
GB382422A (en) Improvements in hardening processes for aluminium alloys
GB362439A (en) Improvements relating to processes for the heat treatment of rails or other massive steel bodies