Abstract:
The present invention relates to a method for manufacturing a hot rolling mill roll by laser cladding a reusable steel axe substrate having a rotational symmetry axis with a metal coating external layer, said metal coating external layer having a work tool steel composition, wherein the composition for said metal coating external layer comprises 0.5-3.5% C, 2-18% Cr, 0.5-7% Mo, 0.5-8% V, 0.2-7% W, 0-5% Nb, 0-1% Ti, 0.5-2% Mn, 0.2-3% Si and 0-3% Ni, the rest being Fe and inevitable impurities;characterised in that : - the composition for said metal coating external layer further comprises nitrogen in the range 200-2500ppm; - the sum of atomic contents (mass %) of MC carbides-forming elements, selected from the group consisting of Ti, Nb, and V, + 3/8 of the sum of atomic contents (mass %) of M23C6 and/or M2C forming elements, selected from the group consisting of Mo, W, and Cr, is lower than the sum of atomic contents (mass %) of interstitial elements C and N, + 0.01.
Abstract:
Materialzusammensetzung für eine Beschichtung für Bauteile von Brennkraftmaschinen, ausgewählt aus einer der drei in der folgenden Tabelle angegebenen Materialzusammensetzungen: Formula.
Abstract:
The present invention relates in one aspect to an iron-based alloy composition comprising: boron (B): 1. 6-2.4 wt.%; carbon (C): 2.2-3.0 wt.%; chromium (Cr): 3.5-5.0 wt.%; manganese (Mn): below 0.8 wt.%; molybdenum (Mo): 16.0-19.5 wt.%; nickel (Ni): 1.0-2.0 wt.%; silicon (Si): 0.2-2.0 wt.%; vanadium (V): 10.8-13.2 wt.%; and balanced with iron (Fe). In a further aspect the invention relates to an item comprising a substrate portion and a hardfacing coating bonded to the substrate portion, wherein the hardfacing coating is made by an overlay welding process using the iron-based alloy composition.
Abstract:
Disclosed herein are embodiments of non-magnetic, strong carbide forming alloys. In particular, the alloys can be advantageously used for powder manufacturing. Embodiments of the disclosure can have low FCC-BCC transition temperatures in combination with hard particles having a hardness of 1000 Vickers or greater. The alloys can be used in conjunction with, for example, drill pipe tool joints, drill collars, down hole stabilizers, or oilfield components, particularly as a hardbanding component.
Abstract:
A wear pad of a band saw guide exposed to wear from a moving band saw blade is produced in a powder metallurgical manner from a steel material having the following composition (1), in per cent by weight: and, further, 7.5 to 14 of (V + Nb/2), wherein the contents of N, on one hand, and of (V + Nb/2), the other hand, are balanced in relation to each other so that the contents of said elements are within an range I", F", G, H, I" in a perpendicular, plane coordinate system, where the content of N is the abscissa and the content of V + Nb/2 is the ordinate, and where the coordinates (2), for said points are: and max 7 of any of Ti, Zr, and A1; balance essentially only iron and unavoidable impurities.
Abstract translation:从具有以下组成(1)的钢材以粉末冶金方式制造暴露于移动带锯条磨损的带锯导向件的磨损垫,重量百分比:以及7.5至14的 (V + Nb / 2),其中一方面的N的含量和(V + Nb / 2)彼此平衡,使得所述元素的含量在一个范围内 I“,F”,G,H,I“,其中N的含量为横坐标,V + Nb / 2的含量为纵坐标,坐标(2)为 所述点为:Ti,Zr和A1中的任一种的最大值7;余量基本上仅为铁和不可避免的杂质。
Abstract:
The invention relates to a powder metallurgy press-sinter shaped part, more particularly a valve or valve part, exhibiting thermal and wear resistance and having the following composition by weight: 0.5 % to 2.0 % C; 5.0 % to 16 % Mo; 0.2 % to 1.0 % P; 0.1 % to 1.4 % Mn; 0 % to 5 % Cr; 0 % to 5 % S; 0 % to 7 % W; 0 % to 3 % V and
Abstract:
The invention relates to a powder metallurgy press-sinter shaped part, more particularly a valve or valve part, exhibiting thermal and wear resistance and having the following composition by weight: 0.5 % to 2.0 % C; 5.0 % to 16 % Mo; 0.2 % to 1.0 % P; 0.1 % to 1.4 % Mn; 0 % to 5 % Cr; 0 % to 5 % S; 0 % to 7 % W; 0 % to 3 % V and
Abstract:
In one aspect, the invention encompasses a method of forming a steel. A metallic glass is formed and at least a portion of the glass is converted to a crystalline steel material having a nanocrystalline scale grain size. In another aspect, the invention encompasses another method of forming a steel. A molten alloy is formed and cooled the alloy at a rate which forms a metallic glass. The metallic glass is devitrified to convert the glass to a crystalline steel material having a nanocrystalline scale grain size. In yet another aspect, the invention encompasses another method of forming a steel. A first metallic glass steel substrate is provided, and a molten alloy is formed over the first metallic glass steel substrate to heat and devitrify at least some of the underlying metallic glass of the substrate.