GB882462A - Process for increasing the hardness of steel surfaces - Google Patents

Process for increasing the hardness of steel surfaces

Info

Publication number
GB882462A
GB882462A GB1019/58A GB101958A GB882462A GB 882462 A GB882462 A GB 882462A GB 1019/58 A GB1019/58 A GB 1019/58A GB 101958 A GB101958 A GB 101958A GB 882462 A GB882462 A GB 882462A
Authority
GB
United Kingdom
Prior art keywords
cooling
hardened
rapidly
focus
radiation
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
GB1019/58A
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
Publication of GB882462A publication Critical patent/GB882462A/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
    • C21D1/06—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

Steel is surface hardened by extremely rapidly heating a thin surface layer to above the Ac3 point and cooling so rapidly as to produce a surface with hardness exceeding 926 kg/sq. cm. V.H.N. and containing less than 2% austenite, the structure of this surface being incapable of resolution under a metal-lurgical microscope. Heating may be by frictional contact with a rapidly revolving wheel or with a stream of high velocity particles, by radiation from a heat source located at one focus of an ellipsoidal reflecting surface, the surface to be treated being progressively exposed to heat at the other focus, or by radiation similarly focused by a parabolidal reflector and lens system. Cooling may be by the mass effect of the body of the material, which effect may be accentuated by pre-cooling the body being surface hardened or quenching, the transformation to the hardened structure being aided by mechanical or sonic vibration.
GB1019/58A 1957-01-12 1958-01-10 Process for increasing the hardness of steel surfaces Expired GB882462A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH882462X 1957-01-12

Publications (1)

Publication Number Publication Date
GB882462A true GB882462A (en) 1961-11-15

Family

ID=4544951

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1019/58A Expired GB882462A (en) 1957-01-12 1958-01-10 Process for increasing the hardness of steel surfaces

Country Status (1)

Country Link
GB (1) GB882462A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0426903A1 (en) * 1989-11-06 1991-05-15 Maurits Jan Maria Demeyere Procedure for the treatment of the surface of a metal receptacle and receptacle treated according to this procedure
US5707181A (en) * 1995-01-04 1998-01-13 Dyckerhoff & Widmann Aktiengesellschaft Method of producing an intended breaking point in a tension member for a soil anchor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0426903A1 (en) * 1989-11-06 1991-05-15 Maurits Jan Maria Demeyere Procedure for the treatment of the surface of a metal receptacle and receptacle treated according to this procedure
US5707181A (en) * 1995-01-04 1998-01-13 Dyckerhoff & Widmann Aktiengesellschaft Method of producing an intended breaking point in a tension member for a soil anchor

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