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2 086 669

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IPC

(21) (22)

Application

94041129/02, 1994-11-10

(22)

Actual filing date

1994-11-10

(45)

Published

1997-08-10

(72)

Inventor

Kozlov N.P.Moiseev B.A.Sisev A.P.Stepanov V.P.Mel'Kumov I.N.Sidorina T.N.Tjurin A.V.

(73)

Holder

Aktsionernoe Obshchestvo Otkrytogo Tipa

MEFOD OF HEAT TREATMENT OF STEEL BLANKS Russian patent published in 1997 - IPC

Abstract RU 2086669 C1

FIELD: metallurgy. SUBSTANCE: invention focuses on removing hydrogen and increasing plasticity in steels, preferably those of bainite type. According to invention, blanks are cooled after hot plastic deformation first to temperatures A_c1 20-30 C with rate 15-60 C/min and then to temperatures by 10-20 C higher than that of the end of ferrite- perlite conversions with rate 1.0-4.5 C/min. Further anti-snowflake treatment is conducted in nonheated stack for 10-30 h followed by cooling in air. EFFECT: increased plasticity, eliminated crack formation, increased specific elongation and impact resistance. 1 tbl

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RU 2 086 669 C1

Authors

Kozlov N.P.

Moiseev B.A.

Sisev A.P.

Stepanov V.P.

Mel'Kumov I.N.

Sidorina T.N.

Tjurin A.V.

Dates

1997-08-10—Published

1994-11-10—Filed