JPS5770258A - Cold rolled steel sheet to be drawn excellent in seizing harden ability and manufacture thereor - Google Patents
Cold rolled steel sheet to be drawn excellent in seizing harden ability and manufacture thereorInfo
- Publication number
- JPS5770258A JPS5770258A JP14595180A JP14595180A JPS5770258A JP S5770258 A JPS5770258 A JP S5770258A JP 14595180 A JP14595180 A JP 14595180A JP 14595180 A JP14595180 A JP 14595180A JP S5770258 A JPS5770258 A JP S5770258A
- Authority
- JP
- Japan
- Prior art keywords
- seizing
- steel sheet
- rolled steel
- cold rolled
- cold
- 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.)
- Granted
Links
Landscapes
- Heat Treatment Of Sheet Steel (AREA)
Abstract
PURPOSE: To produce a cold rolled steel sheet to be drawn excellent in the seizing hardenability, by subjecting a steel material containing specified proportions of C, Mn, Si, P, Al and Nb to cold rolling, continuous annealing and cooling under specified conditions.
CONSTITUTION: A hot rolled steel sheet is prepared from 0.002W0.008wt% of C, 0.005W1.2wt% of Mn, 0.5wt% or more of Si, 0.10wt% or less of P, 0.01W 0.08wt% of Al with the proviso that it is 8 × percentage of N or more, from 3 × percentage of C to 8 × percentage of C+0.02% by weight of Nb, and balance of substantially Fe. After the pickling thereof, it is cold-rolled with a rolling reduction of 60% or more. Then it is heated to a temperature in the range from 750W 900°C, and is retained at that temperature for at least 10sec to be continuously annealed, then is quenched at an average cooling rate of 10°C/sec at least to 650°C, and is slowly cooled after it is cooled to 650°C. Thus, a cold rolled is obrained which has an r value of 1.5 or more, an aging index of 4kg/mm2 or less, and a seizing hard- enability coefficient of 5kg/mm2 or more.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55145951A JPS6017004B2 (en) | 1980-10-18 | 1980-10-18 | Manufacturing method of cold-rolled steel sheet for drawing with excellent bake hardenability |
PCT/JP1981/000289 WO1982001566A1 (en) | 1980-10-18 | 1981-10-19 | Thin steel plate for draw working excellent in bake-hardening properties and process for manufacturing same |
US06/395,049 US4496400A (en) | 1980-10-18 | 1981-10-19 | Thin steel sheet having improved baking hardenability and adapted for drawing and a method of producing the same |
EP81902823A EP0064552B1 (en) | 1980-10-18 | 1981-10-19 | Thin steel plate for draw working excellent in bake-hardening properties and process for manufacturing same |
DE8181902823T DE3176792D1 (en) | 1980-10-18 | 1981-10-19 | Thin steel plate for draw working excellent in bake-hardening properties and process for manufacturing same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55145951A JPS6017004B2 (en) | 1980-10-18 | 1980-10-18 | Manufacturing method of cold-rolled steel sheet for drawing with excellent bake hardenability |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5770258A true JPS5770258A (en) | 1982-04-30 |
JPS6017004B2 JPS6017004B2 (en) | 1985-04-30 |
Family
ID=15396801
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55145951A Expired JPS6017004B2 (en) | 1980-10-18 | 1980-10-18 | Manufacturing method of cold-rolled steel sheet for drawing with excellent bake hardenability |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6017004B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6267120A (en) * | 1985-09-19 | 1987-03-26 | Kobe Steel Ltd | Manufacture of cold rolled steel sheet having superior baking hardenability and vertical cracking resistance further high r value |
US5853903A (en) * | 1996-05-07 | 1998-12-29 | Nkk Corporation | Steel sheet for excellent panel appearance and dent resistance after panel-forming |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS491969A (en) * | 1972-04-24 | 1974-01-09 | ||
JPS49130819A (en) * | 1973-04-24 | 1974-12-14 | ||
JPS54100920A (en) * | 1978-01-26 | 1979-08-09 | Kobe Steel Ltd | Excellently formable high strength cold rolled steel plate and method of producing same |
JPS54107415A (en) * | 1978-02-09 | 1979-08-23 | Nippon Kokan Kk <Nkk> | Cold rolled steel plate with baking hardenability for deep drawing |
JPS55115928A (en) * | 1979-02-27 | 1980-09-06 | Kawasaki Steel Corp | Production of non-aging cold rolled steel plate of excellent deep drawability |
JPS6017004A (en) * | 1983-07-07 | 1985-01-28 | Nippon Steel Corp | Operating method of blast furnace |
-
1980
- 1980-10-18 JP JP55145951A patent/JPS6017004B2/en not_active Expired
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS491969A (en) * | 1972-04-24 | 1974-01-09 | ||
JPS49130819A (en) * | 1973-04-24 | 1974-12-14 | ||
JPS54100920A (en) * | 1978-01-26 | 1979-08-09 | Kobe Steel Ltd | Excellently formable high strength cold rolled steel plate and method of producing same |
JPS54107415A (en) * | 1978-02-09 | 1979-08-23 | Nippon Kokan Kk <Nkk> | Cold rolled steel plate with baking hardenability for deep drawing |
JPS55115928A (en) * | 1979-02-27 | 1980-09-06 | Kawasaki Steel Corp | Production of non-aging cold rolled steel plate of excellent deep drawability |
JPS6017004A (en) * | 1983-07-07 | 1985-01-28 | Nippon Steel Corp | Operating method of blast furnace |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6267120A (en) * | 1985-09-19 | 1987-03-26 | Kobe Steel Ltd | Manufacture of cold rolled steel sheet having superior baking hardenability and vertical cracking resistance further high r value |
JPH0548284B2 (en) * | 1985-09-19 | 1993-07-21 | Kobe Steel Ltd | |
US5853903A (en) * | 1996-05-07 | 1998-12-29 | Nkk Corporation | Steel sheet for excellent panel appearance and dent resistance after panel-forming |
Also Published As
Publication number | Publication date |
---|---|
JPS6017004B2 (en) | 1985-04-30 |
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