EP 0030309 B1 19850213 - HOT ROLLED STRIP OR PLATE OF DENITRIDED STEEL AND PROCESS FOR ITS PRODUCTION
Title (en)
HOT ROLLED STRIP OR PLATE OF DENITRIDED STEEL AND PROCESS FOR ITS PRODUCTION
Publication
Application
Priority
- DE 2949124 A 19791206
- DE 3030060 A 19800808
Abstract (en)
[origin: CA1149711A] HOT STRIPS OR HEAVY PLATES FROM A DENITRATED STEEL AND METHOD FOR THEIR MANUFACTURE In a method for the manufacture of hot strips or heavy plates from a denitrated steel composed of 0.04 to 0.16% carbon, 1.25 to 1.90% manganese, 0.2 to 0.55% silicon, 0.004 to 0.020% phosphorus, 0.002 to 0.015% sulfur, 0.02 to 0.08% aluminum, 0.02 to 0.08% niobium, the remainder iron and possibly contaminants, the improvement comprising the steps of having the hot strips or plates leaving the last finishing stand of rolls at a temperature of 750.degree.C to 820.degree.C, cooling the hot strips or plates to an intermidiate temperature of 450.degree.C to 570.degree.C at a cooling rate of 2 to 10.degree.C/S and then slowly cooling the hot strips or plates in air to room temperature in a coil or in a pile.
IPC 1-7
IPC 8 full level
C21D 8/02 (2006.01); C22C 38/04 (2006.01)
CPC (source: EP US)
C21D 8/0226 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C21D 8/0263 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
EP 0030309 A2 19810617; EP 0030309 A3 19820512; EP 0030309 B1 19850213; CA 1149711 A 19830712; DE 3070180 D1 19850328; US 4397697 A 19830809
DOCDB simple family (application)
EP 80107296 A 19801122; CA 366285 A 19801205; DE 3070180 T 19801122; US 21267580 A 19801203