GB210870A - Improvements in and relating to the cementation of iron and steel - Google Patents

Improvements in and relating to the cementation of iron and steel

Info

Publication number
GB210870A
GB210870A GB3056222A GB3056222A GB210870A GB 210870 A GB210870 A GB 210870A GB 3056222 A GB3056222 A GB 3056222A GB 3056222 A GB3056222 A GB 3056222A GB 210870 A GB210870 A GB 210870A
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GB
United Kingdom
Prior art keywords
parts
iron
cementation
water
potassium
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
GB3056222A
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
Priority to GB3056222A priority Critical patent/GB210870A/en
Publication of GB210870A publication Critical patent/GB210870A/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
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/60—Aqueous agents

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)
  • Chemical Treatment Of Metals (AREA)

Abstract

210,870. Gr÷nqvist, A. Nov. 8, 1922. Cementation.-Iron and steel which has been subjected to the usual cementation process is cooled to approximately 300‹ C. by dipping into a bath containing sulphite lixiviation water and metal salts which produce thereon a deposit of crystals in the form of a thick airtight crust. The iron &c. is then heated until the crust has been vaporized and is then quenched in the usual manner. The bath usually contains 8 parts of raw or inspissated sulphite lixiviation water of 35-38 BÚ. 3 parts of disodium phosphate, ¢ part of potassium ferrocyanide, part of caustic soda and 6-8 parts of water. The material used in the cementation process comprises 1/3 part of disodium phosphate added to a mixture of 3 parts of potassium ferricyanide, 1¢ parts of potassium chromate or bichromate, ¢ part of potassium ferrocyanide and 20-30 parts of charcoal.
GB3056222A 1922-11-08 1922-11-08 Improvements in and relating to the cementation of iron and steel Expired GB210870A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3056222A GB210870A (en) 1922-11-08 1922-11-08 Improvements in and relating to the cementation of iron and steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3056222A GB210870A (en) 1922-11-08 1922-11-08 Improvements in and relating to the cementation of iron and steel

Publications (1)

Publication Number Publication Date
GB210870A true GB210870A (en) 1924-02-08

Family

ID=10309583

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3056222A Expired GB210870A (en) 1922-11-08 1922-11-08 Improvements in and relating to the cementation of iron and steel

Country Status (1)

Country Link
GB (1) GB210870A (en)

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