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JPS5547318A - Pretreating method for annealing of cr stainless steel - Google Patents

Pretreating method for annealing of cr stainless steel

Info

Publication number
JPS5547318A
JPS5547318A JP12043878A JP12043878A JPS5547318A JP S5547318 A JPS5547318 A JP S5547318A JP 12043878 A JP12043878 A JP 12043878A JP 12043878 A JP12043878 A JP 12043878A JP S5547318 A JPS5547318 A JP S5547318A
Authority
JP
Japan
Prior art keywords
stainless steel
annealing
scale
fecl2
fecl3
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.)
Pending
Application number
JP12043878A
Other languages
Japanese (ja)
Inventor
Wataru Murata
Jiro Tominaga
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP12043878A priority Critical patent/JPS5547318A/en
Publication of JPS5547318A publication Critical patent/JPS5547318A/en
Pending 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
    • C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
    • C21D1/72—Temporary coatings or embedding materials applied before or during heat treatment during chemical change of surfaces

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)
  • Heat Treatment Of Sheet Steel (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

PURPOSE:To extremely easily release the scale formed while the annealing process in the pickling bath, the pretreating the surface of stainless steel with the aqueous solution of iron chlorides at annealing the Cr stainless steel. CONSTITUTION:In case of annealing the Cr stainless steel including Cr more than 10% like as the ferrite stainless steel, martensite stainless steel, etc., the metal surface is previously treated with aqueous solution of FeCl2 or FeCl3. In case of employing FeCl2, the concentration of FeCl2 of the aqueous solution is specified to 2-15%; in case of FeCl3, the concentration of FeCl3 is specified to 1.2-15%. After immersing the stainless steel in this solution, the Cr stainless steel is dried up and is annealed at 600-950 deg.C. While this anealing process, chlorine gas is generated from the decomposition of chlorides, forming a scale excellent in the release property; hereby, the scale is easily released by the treatment with the 17.5% hydrochloric acid bath at 80-90 deg.C. The decomposition of chlorides generates Fe which reacts on O2 included in the atmosphere, and diminishes amount of the scale to be formed on the surface of the stainless steel.
JP12043878A 1978-10-02 1978-10-02 Pretreating method for annealing of cr stainless steel Pending JPS5547318A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12043878A JPS5547318A (en) 1978-10-02 1978-10-02 Pretreating method for annealing of cr stainless steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12043878A JPS5547318A (en) 1978-10-02 1978-10-02 Pretreating method for annealing of cr stainless steel

Publications (1)

Publication Number Publication Date
JPS5547318A true JPS5547318A (en) 1980-04-03

Family

ID=14786200

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12043878A Pending JPS5547318A (en) 1978-10-02 1978-10-02 Pretreating method for annealing of cr stainless steel

Country Status (1)

Country Link
JP (1) JPS5547318A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6233293A (en) * 1985-08-01 1987-02-13 Nippon Denso Co Ltd Heat pipe
JPH04191386A (en) * 1990-11-27 1992-07-09 Kawasaki Steel Corp Descaling method for steel strip
JPH0517888A (en) * 1991-07-11 1993-01-26 Kawasaki Steel Corp Manufacture of stainless steel strip
JP2017170489A (en) * 2016-03-24 2017-09-28 日新製鋼株式会社 Method for manufacturing ferritic stainless steel sheet
JP2018009202A (en) * 2016-07-11 2018-01-18 日本パーカライジング株式会社 Carbon steel before heat treatment having excellent scale removal property, carbon steel after heat treatment, manufacturing method of the same, scale removing method, and agent for easily forming descaling film

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6233293A (en) * 1985-08-01 1987-02-13 Nippon Denso Co Ltd Heat pipe
JPH04191386A (en) * 1990-11-27 1992-07-09 Kawasaki Steel Corp Descaling method for steel strip
JPH0517888A (en) * 1991-07-11 1993-01-26 Kawasaki Steel Corp Manufacture of stainless steel strip
JP2017170489A (en) * 2016-03-24 2017-09-28 日新製鋼株式会社 Method for manufacturing ferritic stainless steel sheet
JP2018009202A (en) * 2016-07-11 2018-01-18 日本パーカライジング株式会社 Carbon steel before heat treatment having excellent scale removal property, carbon steel after heat treatment, manufacturing method of the same, scale removing method, and agent for easily forming descaling film

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