GB1446892A - Method for producing a high strength bolt - Google Patents

Method for producing a high strength bolt

Info

Publication number
GB1446892A
GB1446892A GB4137473A GB4137473A GB1446892A GB 1446892 A GB1446892 A GB 1446892A GB 4137473 A GB4137473 A GB 4137473A GB 4137473 A GB4137473 A GB 4137473A GB 1446892 A GB1446892 A GB 1446892A
Authority
GB
United Kingdom
Prior art keywords
steel
temperature
bolt
cold working
sectional area
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
GB4137473A
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel 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
Priority claimed from JP10777472A external-priority patent/JPS5317968B2/ja
Priority claimed from JP6850373A external-priority patent/JPS5424370B2/ja
Application filed by Kobe Steel Ltd filed Critical Kobe Steel Ltd
Publication of GB1446892A publication Critical patent/GB1446892A/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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (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 Steel (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

1446892 Heat-treating steel bolts KOBE STEEL Ltd 3 Sept 1973 [27 Oct 1972 18 June 1973] 41374/73 Heading C7A [Also in Division B3] A method of producing a high strength bolt from a carbon steel or a low alloy steel comprises cold working an elongate form of the steel to produce at least 10% reduction in cross-sectional area, rapidly heating the steel to a temperature in the range 450‹C to the A, transformation temperature, warm-forming the steel to a bolt shape, and cooling the bolt at least at normalizing rate. The bolt may then be retreated to a temperature in the range 450‹C to the A, transformation, maintained at the temperature for fuse members and again cooled at air cooling rate or faster. The initial steel, which contains up to 0.5% C, may be hot-rolled to provide a pearlitic structure which is then normalized or annealed before cold working, or it may be hotrolled and hardened and tempered to provide a tempered martensitic structure. The cross-sectional area of the steel is reduced by from 10 to 40% and the rapid heating is made at at least 50‹C/minute. The cold working is carried out by wire-drawing or working using roller discs.
GB4137473A 1972-10-27 1973-09-03 Method for producing a high strength bolt Expired GB1446892A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10777472A JPS5317968B2 (en) 1972-10-27 1972-10-27
JP6850373A JPS5424370B2 (en) 1973-06-18 1973-06-18

Publications (1)

Publication Number Publication Date
GB1446892A true GB1446892A (en) 1976-08-18

Family

ID=26409720

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4137473A Expired GB1446892A (en) 1972-10-27 1973-09-03 Method for producing a high strength bolt

Country Status (4)

Country Link
DE (1) DE2344027C3 (en)
FR (1) FR2204694B1 (en)
GB (1) GB1446892A (en)
NL (1) NL7314729A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2186290A (en) * 1986-02-11 1987-08-12 Avdel Ltd Pin of sorbitic tempered martensite
CN112322846A (en) * 2020-11-06 2021-02-05 安徽合力股份有限公司合肥铸锻厂 Clean heat treatment process for 42CrMo material high-strength bolt

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2719346B1 (en) * 1994-04-29 1996-06-07 Regie Autonome Transports Threaded fastening member in alloy steel with high fatigue resistance and method of manufacturing such a threaded member.
DE10014078C5 (en) * 2000-03-22 2007-04-05 Nelson Bolzenschweiß-Technik GmbH & Co. KG Method for producing a welding stud

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2186290A (en) * 1986-02-11 1987-08-12 Avdel Ltd Pin of sorbitic tempered martensite
GB2186290B (en) * 1986-02-11 1989-11-22 Avdel Ltd Pin for a fastener, and method of making same
CN112322846A (en) * 2020-11-06 2021-02-05 安徽合力股份有限公司合肥铸锻厂 Clean heat treatment process for 42CrMo material high-strength bolt

Also Published As

Publication number Publication date
DE2344027C3 (en) 1979-08-09
DE2344027A1 (en) 1974-05-22
DE2344027B2 (en) 1978-12-07
FR2204694B1 (en) 1976-06-18
FR2204694A1 (en) 1974-05-24
NL7314729A (en) 1974-05-01

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee