GB846477A - Improvements in or relating to the manufacture of thin iron castings - Google Patents

Improvements in or relating to the manufacture of thin iron castings

Info

Publication number
GB846477A
GB846477A GB5920/57A GB592057A GB846477A GB 846477 A GB846477 A GB 846477A GB 5920/57 A GB5920/57 A GB 5920/57A GB 592057 A GB592057 A GB 592057A GB 846477 A GB846477 A GB 846477A
Authority
GB
United Kingdom
Prior art keywords
temperature
casting
iron
relating
manufacture
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
GB5920/57A
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.)
Renault SAS
Regie Nationale des Usines Renault
Original Assignee
Renault SAS
Regie Nationale des Usines Renault
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 Renault SAS, Regie Nationale des Usines Renault filed Critical Renault SAS
Publication of GB846477A publication Critical patent/GB846477A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys

Landscapes

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

Abstract

A process for heat treating cast iron castings of at most 20mm thickness and containing at least one element which slows down the transformation of the iron selected from Cu, Ni, Ti, Al, Zr, Cr and Mo comprises rapidly cooling the casting from the casting temperature to room temperature, transforming the residual austentite to martensite by treatment at a temperature, transforming the residual austenite with nucleation of the graphite, and effecting graphitization at a temperature higher than the tempering temperature. The casting may be quenched from 800 DEG C. in a liquid medium and then treated in liquid nitrogen, followed by tempering at 440-450 DEG C., cooling in still air, and graphitizing at 875-890 DEG C The cast iron may have the following analysis: 1.18-3.5% C: 1-3% Si: 0.6-2% Mn: 0-3% Cu: 0-3% Ni: 0.05-0.15% S+P: 0-0.15% Ti: 0-0.15% Al: 0-0.3% Zr: 0-0.25% Cr: 0-0.20% Mo: the balance being iron.
GB5920/57A 1956-03-16 1957-02-21 Improvements in or relating to the manufacture of thin iron castings Expired GB846477A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR846477X 1956-03-16

Publications (1)

Publication Number Publication Date
GB846477A true GB846477A (en) 1960-08-31

Family

ID=9313349

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5920/57A Expired GB846477A (en) 1956-03-16 1957-02-21 Improvements in or relating to the manufacture of thin iron castings

Country Status (1)

Country Link
GB (1) GB846477A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1533337B1 (en) * 1965-09-20 1972-03-16 Quebec Iron Foundries Ltd ALLOY WHITE CAST IRON

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1533337B1 (en) * 1965-09-20 1972-03-16 Quebec Iron Foundries Ltd ALLOY WHITE CAST IRON

Similar Documents

Publication Publication Date Title
GB921838A (en) Steel alloy composition
GB1077979A (en) Stainless steel and method
GB802457A (en) Improvements in or relating to high temperature steels and ball or roller bearings made therefrom
GB1056561A (en) Chromium-nickel-aluminium steel and method for heat treatment thereof
GB1046300A (en) Alloy steel
GB846477A (en) Improvements in or relating to the manufacture of thin iron castings
GB1018674A (en) Stainless steel resistant to stress-corrosion cracking
GB904753A (en) Improvements in or relating to high toughness cast iron for relatively thick castings and method of heat treating same
GB1104932A (en) Improvements in or relating to safety razor blades
GB836026A (en) Improvements in or relating to martensitic stainless steels
GB1013735A (en) Steel alloys and method of preparing same
ES439398A1 (en) High elastic-limit weldable cast steels
GB666265A (en) Improvements in or relating to alloy steel
GB833536A (en) Austenitic stainless steel
GB813801A (en) Improvements relating to martensitic stainless steels
GB1027811A (en) Improvements in the production of stainless steel castings and in articles produced therefrom
GB1221546A (en) Improvements in the production of stainless steel castings and articles produced therefrom
GB791884A (en) Improvements in or relating to low alloy steels and articles thereof
GB961430A (en) Nickel-chromium- molybdenum steel
GB678487A (en) Improvements relating to cast iron
GB846481A (en) Improvements in and relating to spheroidal graphite cast iron
GB1049864A (en) Improvements in the production of stainless steel castings and in articles produced therefrom
GB972533A (en) Alloy steel
GB1013239A (en) Improved alloy steels
GB1023131A (en) High strength steel alloy compositions and process of producing super strength steel alloy body