JPS575818A - Punched parts of steel plate - Google Patents
Punched parts of steel plateInfo
- 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
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.
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) |
-
1980
- 1980-06-11 JP JP7850880A patent/JPS575818A/en active Pending
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