GB1172672A - Improvements relating to the Manufacture of Percussive Drill Rods. - Google Patents

Improvements relating to the Manufacture of Percussive Drill Rods.

Info

Publication number
GB1172672A
GB1172672A GB5117865A GB5117865A GB1172672A GB 1172672 A GB1172672 A GB 1172672A GB 5117865 A GB5117865 A GB 5117865A GB 5117865 A GB5117865 A GB 5117865A GB 1172672 A GB1172672 A GB 1172672A
Authority
GB
United Kingdom
Prior art keywords
carburized
drill rods
inch
manufacture
percussive drill
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
GB5117865A
Inventor
Donald Henry Shute
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.)
Padley and Venables Ltd
Original Assignee
Padley and Venables 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 Padley and Venables Ltd filed Critical Padley and Venables Ltd
Priority to GB5117865A priority Critical patent/GB1172672A/en
Publication of GB1172672A publication Critical patent/GB1172672A/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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • C21D9/14—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes wear-resistant or pressure-resistant pipes

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)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Earth Drilling (AREA)

Abstract

1,172,672. Percussive tools. PADLEY & VENABLES Ltd. 6 Jan., 1967 [2 Dec., 1965], No. 51178/65. Heading B4C. [Also in Divisions C7 and E1 Steel rods or tubes, particularly percussive drill rods, containing 0-1% to 0'9% of carbon, are heated to a temperature in the range 850‹ C. to 900‹ C., held at that temperature and then slowly cooled to produce a grain structure having not more than 48 grains per square inch. The heat treatment may be combined with, or followed by, carburization of the outer surface, possibly producing a layer between 0-01 inch and 0-1 inch deep. The whole of the outer surface may be carburized, or only the threaded ends; alternatively the whole of the outer surface may be initially carburized, after which the shank may be given a protective layer, and then the ends further carburized to a greater depth.
GB5117865A 1965-12-02 1965-12-02 Improvements relating to the Manufacture of Percussive Drill Rods. Expired GB1172672A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5117865A GB1172672A (en) 1965-12-02 1965-12-02 Improvements relating to the Manufacture of Percussive Drill Rods.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5117865A GB1172672A (en) 1965-12-02 1965-12-02 Improvements relating to the Manufacture of Percussive Drill Rods.

Publications (1)

Publication Number Publication Date
GB1172672A true GB1172672A (en) 1969-12-03

Family

ID=10458963

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5117865A Expired GB1172672A (en) 1965-12-02 1965-12-02 Improvements relating to the Manufacture of Percussive Drill Rods.

Country Status (1)

Country Link
GB (1) GB1172672A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3839154A1 (en) * 1987-11-17 1989-06-01 Boart Hardmetals Europ Ltd drill bit
FR2780418A1 (en) * 1998-06-29 1999-12-31 Aubert & Duval Sa Case hardening steel e.g. for transmission components of helicopters, competition vehicles and heat engines

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3839154A1 (en) * 1987-11-17 1989-06-01 Boart Hardmetals Europ Ltd drill bit
FR2780418A1 (en) * 1998-06-29 1999-12-31 Aubert & Duval Sa Case hardening steel e.g. for transmission components of helicopters, competition vehicles and heat engines
WO2000000658A1 (en) * 1998-06-29 2000-01-06 Aubert & Duval Case hardened steel with high tempering temperature, method for obtaining same and parts formed with said steel
US6699333B1 (en) 1998-06-29 2004-03-02 Aubert & Duval Case hardened steel with high tempering temperature, method for obtaining same and parts formed with said steel

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees