37results about How to "Reduce crack propagation" patented technology

A steel product for oil country tubular good according to the invention comprises, in mass %, 0.10% to 0.35% C, 0.10% to 0.50% Si, 0.10% to 0.80% Mn, up to 0.030% P, up to 0.010% S, 0.30% to 1.20% Cr, 0.20% to 1.00% Mo, 0.005% to 0.40% V, 0.005% to 0. 100% Al, up to 0.0100% N, up to 0.0010% H, 0 to 0.01% Ca, 0 to 0.050% Ti, 0 to 0.050% Nb, and 0 to 0.0050% B, and the balance of Fe and impurities. The Cr, Mo, and V contents and the grain size GS satisfy expression (1): 0.7≦(1.5×Cr+2.5×Mo+V)−GS / 10≦2.6   (1)

The present invention comprises a novel formulation for marking trafficways, for example roads, which when compared with the prior art have improved mechanical properties and improved heat resistance during curing. The invention also relates to improved reactive resins for other applications than roadmarkings. The present invention in particular relates to reactive resins which comprise core-shell particles.

The invention discloses anticorrosive coating for a low surface treatment stainless steel substrate and a preparation method thereof and belongs to the technical field of the anticorrosive coating. The anticorrosive coating for the low surface treatment stainless steel substrate is prepared from a component A and a component B, wherein the weight ratio of the component A to the component B is 100 to (15 to 25); the component A is prepared from the following components: epoxy resin with low epoxy value, aminosilane, epoxy resin with high epoxy value, aluminum tripolyphosphate, compound zinc phosphate, precipitated barium sulfate, organic soil slurry, polyacrylate and a first solvent, wherein the first solvent comprises xylol, n-butyl alcohol and methyl isobutyl ketone; the component B is prepared from the following components in percentage by weight: polyamide resin, carboxyl-terminated nitrile butadiene rubber and a second solvent, wherein the second solvent comprises xylol and n-butyl alcohol. The anticorrosive coating disclosed by the invention is convenient to use and pre-treatment including sand blasting, electroplating, phosphatization and the like does not need to be carried out on a stainless steel product; a construction technology is simple and is suitable for stainless steel products or components with various sizes and shapes.

A turbine engine part coated in at least a first ceramic layer forming a thermal barrier and including a ceramic material with first ceramic fibers dispersed in the first layer. The first layer may have a chemical composition gradient between a material for forming a thermal barrier and a material for providing protection against calcium and magnesium aluminosilicates, which is present at a greater content in an outer zone of the first layer, and / or the first layer may be porous and may present a porosity gradient such that an outer portion of the first layer presents lower porosity.

A method for fabricating a composite structure. A first section for the composite structure is formed in which the first section has a first end with a chevron shape, wherein first composite layers in the first section has a first step pattern at the first end. A second section for the composite structure is formed in which the second section has a second end with a counterpart shape to the chevron shape and in which second composite layers in the second section have a second step pattern at the second end. The first end the second end are positioned such that a first composite layer in the first composite layers in the first step pattern overlap the second composite layers in the second step pattern at a splice location.

A glass article includes: a glass phase including a first structure in which a silicon atom is covalently bonded to four first oxygen atoms; and a plurality of crystals dispersed in the glass phase. The crystals include beta-quartz crystals, each of the beta-quartz crystals includes the first structure and a second structure in which aluminum is covalently bonded to four second oxygen atoms, and a crystallinity of the beta-quartz crystals is in a range of about 40% to about 50%.