Steel material, its use and its manufacture

Details Steel material, its use and its manufacture Steel material, its use and its manufacture

C - Chemistry, Metallurgy

22

C

C22C 38/26 (2006.01) C21D 1/25 (2006.01) C22C 38/22 (2006.01) C22C 38/24 (2006.01) C22C 38/34 (2006.01) C22C 38/36 (2006.01)

Patent

CA 2381236

The invention concerns a steel material which consists of a steel having the following chemical composition in weigh-%: 1.0-1.9 C, 0.5-2.0 Si, 0.1-1.5 Mn, 4.0-5.5 Cr, 2.5-4.0 (Mo + W/2), however max 1.0 W, 2.0-4.5 (V +Nb/2), however max 1Ø Nb, balance iron and impurities in normal amounts in the form of residual elements from the manufacturing of the steel, and with a microstructure, which in the hardened and tempered condition of the steel contains 5-12 vol-% MC-carbides, at least about 80 vol-% of the carbides having a size which is larger than 3 µm but smaller than 25 µm, preferably smaller than 20 µm, and, prior to tempering, 0.50-0.70 weight-% carbon, which is dissolved in the martensite in the hardened condition of the steel. The material is intended for cold work tools, in the first place for homogenous rolls for cold rolling of metal strips.

L'invention concerne un matériau en acier composé d'un acier renfermant les compositions chimiques suivantes en poids: 1,0-1,9 % de C, 0,5-2,0 % de Si, 0,1-1,5 % de Mn, 4,0-5,5 % de Cr, 2,5-4,0 % de (Mo + <i>W</i>/2), avec un maximum de 1,0 % de W, 2,0-4,5 % de (V + <i>Nb</i>/2), avec un maximum de 1,0 % de Nb, le reste étant constitué de fer et d'impuretés en quantités normales présents sous la forme d'éléments résiduels issus de la fabrication de l'acier. Cet acier, durci et trempé, possède une microstructure contenant 5-12 % en volume de carbures MC, environ 80 % en volume au moins de carbures ayant une taille supérieure à 3 mu m mais inférieure à 25 mu m, de préférence inférieure à 20 mu m, et qui, avant la trempe, contient 0,50-0,70 % en poids de carbone, dissout dans le martensite, dans l'acier durci. Ledit matériau est destiné aux outils d'écrouissage, en premier lieu aux rouleaux homogènes destinés au laminage à froid de bandes métalliques.

Affiliated with

Also associated with

Rating

Steel material, its use and its manufacture does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Steel material, its use and its manufacture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Steel material, its use and its manufacture will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1946881