JPS575818A - Punched parts of steel plate - Google Patents

Punched parts of steel plate

Info

Publication number
JPS575818A
JPS575818A JP7850880A JP7850880A JPS575818A JP S575818 A JPS575818 A JP S575818A JP 7850880 A JP7850880 A JP 7850880A JP 7850880 A JP7850880 A JP 7850880A JP S575818 A JPS575818 A JP S575818A
Authority
JP
Japan
Prior art keywords
steel plate
ratio
inclusion
punched parts
punched
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
JP7850880A
Other languages
Japanese (ja)
Inventor
Masaaki Ohashi
Satoshi Hanai
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
Toyota Motor Corp
Original Assignee
Nippon Steel Corp
Toyota Motor 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, Toyota Motor Corp filed Critical Nippon Steel Corp
Priority to JP7850880A priority Critical patent/JPS575818A/en
Publication of JPS575818A publication Critical patent/JPS575818A/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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation

Landscapes

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

Abstract

PURPOSE:To upgrade the ductility and working properties of the punched parts, by carrying out the shape adjustment of a sulfurized inclusion in response to a work hardening layer after the punching work of steel plate. CONSTITUTION:The elongation rate R of the sulfurized inclusion in the steel plate, that is, the ratio of the length l of the inclusion that is stretched in the rolling direction to the length c in a direction parpendicular to the rolling direction (l/c) is adjusted by the addition of Ca, REM, Zr, Ti, etc. to the steel. Next, the ratio of a punching work hardening layer to the plate thickness, d%, is affected by a punching work method and the characteristics of the material itself, particularly the tensile strength. Therefore, with a relationship, 10R+d<60, being established between the elongation ratio R and the ratio d%, the steel plate is punched. The punched parts thus obtained has excellent ductility and working properties.
JP7850880A 1980-06-11 1980-06-11 Punched parts of steel plate Pending JPS575818A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7850880A JPS575818A (en) 1980-06-11 1980-06-11 Punched parts of steel plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7850880A JPS575818A (en) 1980-06-11 1980-06-11 Punched parts of steel plate

Publications (1)

Publication Number Publication Date
JPS575818A true JPS575818A (en) 1982-01-12

Family

ID=13663876

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7850880A Pending JPS575818A (en) 1980-06-11 1980-06-11 Punched parts of steel plate

Country Status (1)

Country Link
JP (1) JPS575818A (en)

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