GB944572A - Method of pre-carburization of drill steel - Google Patents

Method of pre-carburization of drill steel

Info

Publication number
GB944572A
GB944572A GB983160A GB983160A GB944572A GB 944572 A GB944572 A GB 944572A GB 983160 A GB983160 A GB 983160A GB 983160 A GB983160 A GB 983160A GB 944572 A GB944572 A GB 944572A
Authority
GB
United Kingdom
Prior art keywords
temperature
hardened
billet
diffusion
hardening
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
GB983160A
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.)
TADEUSZ WLADYSLAW WLODEK
Original Assignee
TADEUSZ WLADYSLAW WLODEK
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 TADEUSZ WLADYSLAW WLODEK filed Critical TADEUSZ WLADYSLAW WLODEK
Publication of GB944572A publication Critical patent/GB944572A/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
    • C23C8/80—After-treatment

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

944,572. Making drills; altering physical properties; working at specified temperatures. T. W. WLODEK. March 21, 1960 [Aug. 24, 1959], No. 9831/60. Headings B3A and B3V. A process for producing a hardened hollow steel member comprises hardening one of the surfaces of a hollow steel billet of at least four inches in thickness having a hole therein of at least one inch diameter, the hardening being effected at an elevated temperature, e.g. 1500‹ to 2300‹ F. in the presence of carbon and/or other diffusion hardening element until a hardened layer of from 0.015 to 0.080 inch thick is formed and subjecting said member to mechanical deformation under pressure at a temperature of 1500‹ to 2100‹ F. to effect considerable reduction in cross-sectional area to produce a hollow steel member such as hollow drill steel, thereby effecting grain and structure refinement and improving the physical properties of the hardened surface layer. The hardened surface may be further treated by pressing shallow grooves at spaced intervals on said surface, said grooves being between one thousandth and one sixteenth of an inch in depth. This treatment is carred out at room temperature or below the recrystallization temperature of the metal. It may also be carried out above the recrystallization temperature provided it is followed by over rolling with a smooth roller at a temperature below the recrystallization temperature. The pre-diffusion impregnation treatment by, for example, chromium, molybdenum, cobalt, columnium, titanium, boron, silicon, aluminium, uranium, vanadium, tungsten, nickel and their compounds, provides a surface alloy layer which is refined by the final plastic deformation. After completion of the pre-diffusion treatment the billet is cooled and cleaned and an austenitic manganese steel rod is inserted into the centre hole of the billet prior to the final rolling operation. Specific examples of the process are given in the Specification. Specification 815,958 is referred to.
GB983160A 1959-08-24 1960-03-21 Method of pre-carburization of drill steel Expired GB944572A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US83540959A 1959-08-24 1959-08-24

Publications (1)

Publication Number Publication Date
GB944572A true GB944572A (en) 1963-12-18

Family

ID=25269442

Family Applications (1)

Application Number Title Priority Date Filing Date
GB983160A Expired GB944572A (en) 1959-08-24 1960-03-21 Method of pre-carburization of drill steel

Country Status (1)

Country Link
GB (1) GB944572A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2097552A1 (en) * 2006-12-15 2009-09-09 Tenneco Automotive Operating Company Inc. Method of manufacture using heat forming
EP3438320A4 (en) * 2016-03-30 2019-08-21 NHK Spring Co., Ltd. Hollow spring member and hollow spring member production method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2097552A1 (en) * 2006-12-15 2009-09-09 Tenneco Automotive Operating Company Inc. Method of manufacture using heat forming
EP2097552A4 (en) * 2006-12-15 2010-05-19 Tenneco Automotive Operating Method of manufacture using heat forming
EP3438320A4 (en) * 2016-03-30 2019-08-21 NHK Spring Co., Ltd. Hollow spring member and hollow spring member production method
US10900112B2 (en) 2016-03-30 2021-01-26 Nhk Spring Co., Ltd. Hollow spring member and hollow spring member production method

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