Powder metallurgy manufactured high speed steel

Details Powder metallurgy manufactured high speed steel Powder metallurgy manufactured high speed steel

C - Chemistry, Metallurgy

22

C

C22C 33/02 (2006.01) C21D 6/00 (2006.01) C22C 38/02 (2006.01) C22C 38/04 (2006.01) C22C 38/22 (2006.01) C22C 38/24 (2006.01) C22C 38/26 (2006.01) C22C 38/36 (2006.01) C22C 38/38 (2006.01)

Patent

CA 2376529

A powder metallurgy manufactured high speed steel with a high content of nitrogen in the form of a body formed through consolidation of alloyed metal power has the chemical composition in weight-%: 1-2.5 C, 1-3.5 N, 0.05-1.7 Mn, 0.05-1.2 Si, 3-6 Cr, 2-5 Mo, 0.05-5W, 6.2-1.7 (V + 2 Nb), balance iron and unavoidable impurities in normal amounts, wherein the amount of, on one hand, the carbon equivalent, Ceq, expressed as formula (1), and, on the other hand, the vanadium equivalent, Veq, espressed as Veq = V + 2 Nb, are balanced relative to each other such that the amounts of said elements, expressed in terms of said equivalent, will lie within the area A 1-B 1-C 1-D 1-A1 in the system of co-ordinates in the figure, in which the Ceq/Veq-co-ordinates of the points A1-D1 are: A1: 4.5/17; B1: 5.5/17; C1: 2.5/6.2; D1: 1.5/6.2. The structure of the steel in the hardened and tempered condition, contains 12-40 vol-% of hard matter consisting of particles of MX-type, which are evenly distributed in the matrix of the steel, where M in said hard matter of MX-type essentially consists of vanadium and/or niobium, and X consists of 30-50 weight-% carbon and 50-70 weight-% nitrogen.

L'invention concerne un acier rapide de la métallurgie des poudres contenant une grande quantité d'azote sous la forme d'un corps formé par consolidation d'un alliage de poudres métalliques, et présente la composition chimique suivante en % en poids : 1-2.5 C, 1-3.5 N, 0.05-1.7 Mn, 0.05-1.2 Si, 3-6 Cr, 2-5 Mo, 0.05-5 W, 6.2-1.7 (V+2Nb), le reste étant constitué de fer et d'impuretés en quantité normale. Les quantités, d'une part, de l'equivalent carbone Ceq selon la relation Ceq = C+(12/14)N, et d'autre part, de l'équivalent vanadium Veq selon la relation Veq = V+2Nb sont équilibrées l'une par rapport à l'autre de manière que les quantités desdits éléments, exprimées en termes desdits équivalents, se trouveront dans la zone A1-B1-C1-D1-A1 du système de coordonnées de la figure 1, dans laquelle les coordonnées Ceq/Veq des points A1-D1 sont : A1 : 4.5/17, B1 : 5.5/17, C1 : 2.5/6.2, D1 : 1.5/6.2. La structure de l'acier durci et trempé contient 12-40 % en volume de matière solide composée de particules du type MX, distribuées uniformément dans la matrice de l'acier, dans cette matière solide composée de particules du type MX, distribuées uniformément dans la matrice de l'acier, dans cette matière solide du type MX, M est essentiellement constitué de vanadium et/ou de niobium, et X est constitué de 30-50 % en poids de carbone et de 50-70 % en poids d'azote.

Affiliated with

Also associated with

Rating

Powder metallurgy manufactured high speed steel does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Powder metallurgy manufactured high speed steel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Powder metallurgy manufactured high speed steel will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1910339