Galvannealed steel sheet having a steel substrate coated with a first alloy layer with iron and nickel directly topped by a second alloy layer based on zinc, the first and second alloyed layers being alloyed through diffusion such that the second alloy layer includes from 5 to 15 wt. % of iron, from 0 to 15 wt. % of nickel, a balance being zinc.

A blade for fluid catalytic cracking (FCC) flue hot gas expander with a layer of hard abrasive material localized on the blade tip that contributes to reducing the accumulation of FCC catalyst residuals in the expander.

A method of protecting slurry handling equipment is presented which involves (a) identifying one or more types of wear events (erosion, abrasion, corrosion) to which a surface of the slurry handling equipment is susceptible during operation; (b) estimating the severity of each type of wear event the surface will experience during operation; and (c) applying one or more of a thermal spray coating comprising a metal carbide or a metal nitride, and an erosion resistant organic coating to the surface. The types and severity of the wear events are predicted using one or more computational fluid dynamics models, and the application of either or both of the thermal spray coating and the erosion resistant organic coating to the surface is predicated on the types of wear events identified and their estimated severity. In addition, slurry handling equipment and components thereof protected using the method are provided.

A multilayer abradable coating includes at least one first abradable layer; and at least one second abradable layer, wherein the first abradable layer and the second abradable layer have different properties related to erosion resistance.

This disclosure describes various configurations and components for bimetallic and trimetallic claddings for use as a wall element separating nuclear material from an external environment. The cladding materials are suitable for use as cladding for nuclear fuel elements, particularly for fuel elements that will be exposed to sodium or other coolants or environments with a propensity to react with the nuclear fuel.

The sliding member includes a base and a coating layer formed on the base, in which the coating layer includes a particle aggregate containing first particles of a precipitation-hardening copper alloy.

The method for manufacturing the sliding member includes the step of spraying a first powder of the precipitation-hardening copper alloy or a mixed powder containing the first powder and a second powder harder than the first powder onto the base in an un melted state, so as to form the coating layer on the base.

In rolls of winding equipment in a hot-rolling factory, each roll includes a lower cladding layer formed on the surface of the roll barrel and a self-fluxing alloy layer formed on the lower cladding layer by thermal spraying and containing carbide particles dispersed therein. The lower cladding layer includes an Fe-based cladding layer which has a Shore hardness of 60 or greater and which contains, in terms of mass %, 0.1-0.4 C, up to 2.0 Si, up to 3.0 Mn, 1.0-15.0 Cr, and 2.5-5.0 Ni. The lower cladding layer further contains one or more of Mo, V, and Co, the contents of Mo, V, and Co being 0.1-5.0 mass %, 0.1-3.0 mass %, and 0.5-5.0 mass %, respectively.

A machine, such as a hauler at a mining site, includes one or more bolted (clamped) joints. Friction coatings are applied to surfaces of two or more materials being clamped to reduce clamp load loss. The friction coatings include one or more coated surfaces and one or more interstitial spaces between the coated surfaces. Various materials may be used as the friction coating including, but not limited to, a tungsten/carbide or stellite/carbide alloy, iron base alloys such as POLYMET alloys, including PMET 290 (an alloy of iron, chromium, boron, manganese, silicone, and nickel), a nickel chromium alloy, e.g., Ni-20Cr, aluminum oxide (Al.sub.2O.sub.3) particles, and various combinations of these and other suitable materials.

A method for repairing a blade wherein the blade comprises a metallic substrate shaped to define an airfoil having a tip. A coating is on the tip. The method comprises: machining to at least partially remove the coating; plating a nickel-based base layer; and plating an abrasive layer comprising a nickel-based matrix and an abrasive.

A method for applying an abrasive comprises: applying, to a substrate, the integral combination of a self-braze material, an abrasive, a matrix in which the abrasive is at least partially embedded, and an intermediate layer between the self-braze material and the matrix; and heating to cause the self-braze material to braze to the substrate.