JPS579829A - Method for removal of grain boundary oxidation layer of ni-containing cast steel product - Google Patents

Method for removal of grain boundary oxidation layer of ni-containing cast steel product

Info

Publication number
JPS579829A
JPS579829A JP8446080A JP8446080A JPS579829A JP S579829 A JPS579829 A JP S579829A JP 8446080 A JP8446080 A JP 8446080A JP 8446080 A JP8446080 A JP 8446080A JP S579829 A JPS579829 A JP S579829A
Authority
JP
Japan
Prior art keywords
cast steel
grain boundary
oxidized layer
removal
steel products
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
JP8446080A
Other languages
Japanese (ja)
Inventor
Koichi Kamishiro
Hiroaki Okajima
Fumio Matsuno
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
Sumitomo Metal Industries 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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP8446080A priority Critical patent/JPS579829A/en
Publication of JPS579829A publication Critical patent/JPS579829A/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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/001—Heat treatment of ferrous alloys containing Ni
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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 Articles (AREA)

Abstract

PURPOSE:To perform titled removal surely irrespectively of the shapes of Ni-contg. cast steel products having undergone casting, by heating and cooling said cast steel products under specific conditions. CONSTITUTION:An Ni-contg. cast steel product having undergone casting is heated to above 1,050 deg.C, and is held for one hour at that temp. Then, the grain boundary oxidized layer III having been produced in a tortoise-shell pattern within a base IV along the grain boundary of the base IV changes to intergranular oxidized layers such as an external oxidized layer I and a layer II (metallic grains+FeO) below the same. Next, the product is quenched down to below 600 deg.C at >=50 deg.C/H rates, by which it is passed quickly through the temp. region of 600-1,050 deg.C where the grain boundary oxidized layer III is likely to occur and eventually the residue of the oxidized layer III is obviated. Thence, the layers I, II are removed surely irrespectively of the shapes of cast steel products by an ordinary descaling method such as, for example, sand blasting.
JP8446080A 1980-06-20 1980-06-20 Method for removal of grain boundary oxidation layer of ni-containing cast steel product Pending JPS579829A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8446080A JPS579829A (en) 1980-06-20 1980-06-20 Method for removal of grain boundary oxidation layer of ni-containing cast steel product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8446080A JPS579829A (en) 1980-06-20 1980-06-20 Method for removal of grain boundary oxidation layer of ni-containing cast steel product

Publications (1)

Publication Number Publication Date
JPS579829A true JPS579829A (en) 1982-01-19

Family

ID=13831230

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8446080A Pending JPS579829A (en) 1980-06-20 1980-06-20 Method for removal of grain boundary oxidation layer of ni-containing cast steel product

Country Status (1)

Country Link
JP (1) JPS579829A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56160520A (en) * 1980-05-12 1981-12-10 Nippon Gas Giken Kk Gas accident preventing device
JP2005060768A (en) * 2003-08-12 2005-03-10 Jfe Steel Kk Method for manufacturing hot-rolled alloy steel material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56160520A (en) * 1980-05-12 1981-12-10 Nippon Gas Giken Kk Gas accident preventing device
JP2005060768A (en) * 2003-08-12 2005-03-10 Jfe Steel Kk Method for manufacturing hot-rolled alloy steel material

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