A steel for high-strength aluminum clad substrate, comprising the following chemical elements by mass percent: C: 0.008-0.02%, 0<Si≤0.005%, Mn: 0.25-0.5%, P: 0.018-0.03%, Al≤0.005%, N: 0.0040-0.010%, Ti: 0.02-0.04%, O: 0.02-0.050%, and the balance being Fe and other inevitable impurities. The manufacturing method therefor comprises the steps of: (1) smelting and casting; (2) reheating: reheating a casting blank to 1180° C.-1250° C.; (3) rough rolling; (4) finish rolling; (5) coiling; and (6) cooling to room temperature. The steel for high-strength aluminum clad substrate has good strength and good plasticity.

Steel for coiled tubing with a low yield ratio and ultra-high strength and a preparation method thereof, wherein the chemical composition of the steel in mass percentage is: C: 0.05-0.16%, Si: 0.1-0.9%, Mn: 1.25-2.5%, P≤0.015%, S≤0.005%, Cr: 0.51-1.30%, Nb: 0.005-0.019%, V: 0.010-0.079%, Ti: 0.01-0.03%, Mo: 0.10-0.55%, Cu: 0.31-0.60%, Ni: 0.31-0.60%, Ca: 0.0010-0.0040%, Al: 0.01-0.05%, N≤0.008%, and the rest being Fe and inevitable impurity elements. The chemical composition combines the technologies of low temperature finishing rolling and low temperature coiling to obtain an MA constituent+bainite+ferrite multiphase structure. The steel has a low yield ratio and ultra-high strength with the following specific properties: yield strength≥620 MPa, tensile strength≥750 MPa, elongation≥11%, and yield ratio≤0.83, and is suitable for manufacturing coiled tubing with ultra-high strength having a grade of 110 ksi or higher.

According to an example, an apparatus may include a processor and a memory on which is stored instructions. The instructions may cause the processor to control at least one energy source to apply energy at a certain low energy level onto a layer of metallic particles, in which the metallic particles have micron-level dimensions, and in which application of the certain low energy level may sinter the metallic particles and may cause formation of physical connections between adjacent ones of the metallic particles. The instructions may also cause the processor to control the at least one energy source to apply energy at a certain high energy level onto the layer of metallic particles, in which application of the certain high energy level energy may melt and fuse the sintered metallic particles.

According to an example, an apparatus may include a processor and a memory on which is stored instructions. The instructions may cause the processor to control at least one energy source to apply energy at a certain low energy level onto a layer of metallic particles, in which the metallic particles have micron-level dimensions, and in which application of the certain low energy level may sinter the metallic particles and may cause formation of physical connections between adjacent ones of the metallic particles. The instructions may also cause the processor to control the at least one energy source to apply energy at a certain high energy level onto the layer of metallic particles, in which application of the certain high energy level energy may melt and fuse the sintered metallic particles.

An iron-based superalloy for high temperature 700° C. with coherent precipitation of cuboidal B2 nanoparticles, belongs to the field of heat-resistant stainless steel, including Fe, Cr, Ni, Al, Mo, W, Zr, B elements. C, Si, Mn, S, P, O, N are impurity elements. The weight percent (wt. %) of its alloy composition is Cr: 10.0˜12.0, Ni: 13.0˜15.0, Al: 6.0˜7.0, Mo: 2.0˜3.0, W: 0.3˜0.7, Zr: 0.03˜0.05, B: 0.004˜0.007, C≤0.02, Si≤0.20, Mn≤0.20, S≤0.01, P≤0.02, O≤0.005, N≤0.02, Fe: balance; and the atomic percent ratio of Zr/B is 1:1, the atomic percent ratio of Cr/(Mo+W) is 8:1, and the atomic percent ratio of Mo/W is 8:1. The coherent precipitation of cuboidal B2 nanoparticles in ferritic matrix through the alloy composition design.

An iron-based superalloy for high temperature 700° C. with coherent precipitation of cuboidal B2 nanoparticles, belongs to the field of heat-resistant stainless steel, including Fe, Cr, Ni, Al, Mo, W, Zr, B elements. C, Si, Mn, S, P, O, N are impurity elements. The weight percent (wt. %) of its alloy composition is Cr: 10.0˜12.0, Ni: 13.0˜15.0, Al: 6.0˜7.0, Mo: 2.0˜3.0, W: 0.3˜0.7, Zr: 0.03˜0.05, B: 0.004˜0.007, C≤0.02, Si≤0.20, Mn≤0.20, S≤0.01, P≤0.02, O≤0.005, N≤0.02, Fe: balance; and the atomic percent ratio of Zr/B is 1:1, the atomic percent ratio of Cr/(Mo+W) is 8:1, and the atomic percent ratio of Mo/W is 8:1. The coherent precipitation of cuboidal B2 nanoparticles in ferritic matrix through the alloy composition design.

Coated grain oriented electrical steel plates and methods of producing the same are provided. In an exemplary embodiment, a method includes producing molten steel with from about 2.5 to about 4 weight percent silicon, from about 0.005 to about 0.1 weight percent carbon, and from about 90 to about 97.5 weight percent iron. The molten steel is cast into a slab and then cold rolled into a plate having a surface. The plate is decarbonized using a decarbonization anneal, and then recrystallized using a recrystallization anneal to produce grain oriented electrical steel. A coating is applied overlying the surface, where the coating includes an organic radiation curable crosslinking agent and a photo-initiator. The coating is cured by exposing it to a radiation source.

Coated grain oriented electrical steel plates and methods of producing the same are provided. In an exemplary embodiment, a method includes producing molten steel with from about 2.5 to about 4 weight percent silicon, from about 0.005 to about 0.1 weight percent carbon, and from about 90 to about 97.5 weight percent iron. The molten steel is cast into a slab and then cold rolled into a plate having a surface. The plate is decarbonized using a decarbonization anneal, and then recrystallized using a recrystallization anneal to produce grain oriented electrical steel. A coating is applied overlying the surface, where the coating includes an organic radiation curable crosslinking agent and a photo-initiator. The coating is cured by exposing it to a radiation source.

The invention relates to the technical field of microstructure refinement and homogenization of bearing steel, and specifically relates to a high-carbon bearing steel and a method of preparing same. The high-carbon bearing steel of the invention has the following chemical composition: C: 0.80˜1.20 wt %, Cr: 0.40˜2.0 wt %, Mn: 0.15˜0.75 wt %, Si: 0.15˜0.75 wt %, Nb: 0˜0.20 wt %, Mo: 0˜0.20 wt %, V: 0˜0.20 wt %, P≤0.015 wt %, S≤0.01 wt %, the remaining is Fe and unavoidable impurities; the contents of Nb, Mo and V are not 0 at the same time. According to the invention, microalloying elements such as Nb, Mo and V, in combination with other elements, are added into the high-carbon bearing steel to effectively refine the bearing steel matrix and promote the precipitation of a large amount of nano-carbides, thereby enhancing the contact fatigue life of the high-carbon bearing steel.

The invention relates to the technical field of microstructure refinement and homogenization of bearing steel, and specifically relates to a high-carbon bearing steel and a method of preparing same. The high-carbon bearing steel of the invention has the following chemical composition: C: 0.80˜1.20 wt %, Cr: 0.40˜2.0 wt %, Mn: 0.15˜0.75 wt %, Si: 0.15˜0.75 wt %, Nb: 0˜0.20 wt %, Mo: 0˜0.20 wt %, V: 0˜0.20 wt %, P≤0.015 wt %, S≤0.01 wt %, the remaining is Fe and unavoidable impurities; the contents of Nb, Mo and V are not 0 at the same time. According to the invention, microalloying elements such as Nb, Mo and V, in combination with other elements, are added into the high-carbon bearing steel to effectively refine the bearing steel matrix and promote the precipitation of a large amount of nano-carbides, thereby enhancing the contact fatigue life of the high-carbon bearing steel.