Cold rolled steel sheets having improved spot weldability

Details Cold rolled steel sheets having improved spot weldability Cold rolled steel sheets having improved spot weldability

1989-09-21

1992-02-18

Yee, Deborah

Metal treatment

Stock

Ferrous

148330, C22C 3806, C22C 3814, C22C 3812

Patent

active

050890689

ABSTRACT:
An extra-low carbon cold rolled steel sheet useful for use in automobiles and the like, having an improved spot weldability is obtained by combining and adding Ti, Nb and B in predetermined amounts to an extra-low carbon steel to control the amount of fine Ti precipitate dispersed in steel to within a specified reasonable range. Furthermore, the spot weldability is improved by controlling the production conditions of the extra-low carbon steel sheet to within specified reasonable ranges.

REFERENCES:
patent: 4141761 (1979-02-01), Abraham et al.
patent: 4504326 (1985-03-01), Tokunaga et al.
patent: 4586966 (1986-05-01), Okamoto et al.
patent: 4615749 (1986-10-01), Satoh et al.

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