37results about How to "Poor toughness" patented technology

A preform can be molded by resin transfer molding and yields a composite material having excellent strength and excellent interlaminar debonding resistance. The preform, which is for producing a fiber-reinforced composite, comprises layers of laminated structure of a reinforcing material comprising reinforcement fibers and has, between these layers, a layer comprising a thermoplastic resin and having space so as not to inhibit a liquid resin from flowing therethrough. The preform is molded to yield a fiber-reinforced composite material.

The invention provides a golf ball composed of a core, a cover having a plurality of dimples on an outside surface thereof, and an intermediate layer disposed between the core and the cover. The core has a deflection, when compressed under a final load of 130 kgf from an initial load of 10 kgf, of at least 3.0 mm but not more than 5.0 mm. The intermediate layer is formed of a highly neutralized resin material, and has a Shore D hardness of at least 40 but not more than 60 and a thickness of at least 1.7 mm but not more than 4.0 mm. The number of dimples is at least 272 but not more than 348. The golf ball, through a combination of dimples which do not cause a loss of lift in the low-velocity, low-spin rate region of the ball trajectory and a low-spin construction, travels farther and is therefore beneficial for competitive use by both skilled and amateur golfers.

The present invention discloses a polyvinyl chloride modifier, composition and a preparation method thereof. The composition comprises the following components by parts by weight: (a) polyvinyl chloride resin of 100 parts, and (b) a toughening modifier of 2-16 parts, the toughening modifier being rubber powder whose an elongation at break is greater than 2201% and which contains weight percentage of chlorine of 5-45 wt %. The elongation at break of the polyvinyl chloride composition of the present invention is greatly improved, and the defect of low elongations at break of polyvinyl chloride product is substantially solved accordingly, therefore, the application scope of polyvinyl chloride surely will be greatly widened.

The invention relates to the technical field of machining methods of deep hole machining equipment, in particular to a strengthening, toughening and straightening process for a deep hole machining gun-drill drill rod. The process includes the following steps that 1) material selection, pipe manufacturing and forming are conducted, and superior alloy steel or tool steel or carburizing steel is selected and machined to form the deep hole machining gun-drill drill rod before heat treatment; 2) heat treatment strengthening, toughening and straightening are integrated, the deep hole machining gun-drill drill rod before heat treatment is vertically hung on a tool, a balance weight is hung at the bottom end of the deep hole machining gun-drill drill rod, and carburizing, quenching, balance weight automatic straightening or quenching and automatic straightening are conducted; and 3) tempering, straightening and cooling are conducted. Compared with the prior art, the superior alloy steel or tool steel or carburizing steel is selected as raw materials, through heat treatment of a controlled atmosphere furnace, a vacuum furnace and a high-frequency furnace and under the gravity effect of the balance weight, automatic straightening or carburizing steel carburizing and quenching are conducted, the carbon content is increased, and toughness is enhanced; heat treatment strengthening, toughening and straightening are integrated, and automatic straightening is achieved in the tempering process.

The present invention relates to an aqueous epoxy resin blend dispersion of a high mw epoxy resin and a liquid epoxy resin with a dispersant having an interfacial tension such that a drop of the mixture of the dispersant in a melt of the epoxy resin blend against water is less than 2 dynes/cm, preferably less than 1 dyne/cm, and a process for preparing this epoxy resin blend dispersion. Specifically, the process is a solvent free melt kneading or shearing dispersion process wherein the dispersion is processed at from 50 to 150° C., and the resulting dispersion is stable.

The present invention discloses a polyvinyl chloride mixture and a preparation method thereof. The mixture comprises the following components in parts be weight: (a) polyvinyl chloride resin of 100 parts and (b) a toughening modifier of 2-20 parts, the toughening modifier being rubber powder whose elongation at break is 1601%-2200% and which contains the percentage of chlorine of 5-45 wt %. The elongation at break of the polyvinyl chloride mixture of the present inventions is greatly improved, and the defect of low elongation at break of the polyvinyl chloride product is substantially solved accordingly; therefore, the application scope of polyvinyl chloride surely will be greatly widened.

A welded steel pipe with excellent welded heat-affected zone toughness includes a butt weld formed by prior welding either an inner surface or an outer surface with a single layer for each of the inner and outer surfaces, wherein in the metallographic structure of a welded heat-affected zone, the martensite-austenite constituent (MA) area fraction is 4% or less, the average prior-austenite grain size is 400 μm or less, and the following items are taken into account: the average prior-austenite grain size of a welded heat-affected zone formed by prior welding, the average prior-austenite grain size of a welded heat-affected zone formed by subsequent welding, the bead width determined at a position 5 mm apart from the tip of a weld bead formed by subsequent welding, the fusion line tilt angle of a weld bead of prior welding, and the fusion line tilt angle of a weld bead of subsequent welding.

The invention discloses 1500MPa hot stamping part cold trimming and punching tool die steel and a preparation method thereof. The die steel comprises chemical components including, by weight percent, 0.65%-0.75% of C, 0.40%-0.60% of Si, 0.20%-0.40% of Mn, 4.50%-5.80% of Cr, 1.70%-1.90% of Mo, 0.55%-0.65% of V, less than or equal to 0.015% of P, less than or equal to 0.010% of S and the balance Fe and inevitable impurity elements. After being subjected to induction melting, electroslag remelting, forging, annealing and quenching and tempering heat treatment, the die steel has excellent anti-tipping and anti-cracking performance, and due to high hardness and high wear resistance, it is guaranteed that materials are not prone to abrasion or galling in the blanking process; and after a reasonable heat treatment process, good dimensional stability is achieved, and the size out-of-tolerance of a tool due to heat treatment is avoided.

The invention relates to a preparation method of a wear-resistant metal-multi-element ceramic composite modified coating on the surface of a titanium alloy, and belongs to the technical field of surface engineering. The preparation method of the wear-resistant metal-multi-element ceramic composite modified coating on the surface of the titanium alloy comprises the following steps: (1) preparing pre-alloyed powder for later use; (2) cleaning the to-be-clad surface of a base material by adopting industrial alcohol, and then carrying out blackening treatment on the surface of the base material; and (3) coaxially conveying the pre-alloyed powder prepared in the step (1) to the to-be-clad surface of a base material, which is treated in the step (2), carrying out laser cladding, and preparing to obtain the wear-resistant metal-multi-element ceramic composite modified coating on the surface of the titanium alloy. The composite modified coating prepared through the preparation method is obvious in grain refinement, the purpose of grain refinement strengthening is achieved, the coating is guaranteed to have high hardness and high toughness at the same time, and therefore the wear resistance of the titanium alloy can be greatly improved, and then the service life of the titanium alloy under a complex working condition is prolonged.

The present invention provides as steam barrier resin, a steam barrier coating agent, a steam barrier film, and a steam barrier laminate that exhibit an improved steam barrier property. The steam barrier resin of the present invention is obtained by reacting a carboxylic acid group and/or an acid anhydride group of a copolymer (C) with an organometallic complex (D). The copolymer (C) is obtained by polymerizing an unsaturated hydrocarbon monomer (A) and an unsaturated carboxylic acid and/or an unsaturated dicarboxylic anhydride (B). Further, the steam barrier resin includes metal bridging between the copolymers (C). The steam barrier coating agent of the present invention contains the steam barrier resin and a solvent (B). The steam barrier film of the present invention is a film containing the steam barrier resin of the present invention. The steam barrier laminate is obtained by laminating the steam barrier film of the present invention on at least one surface of a substrate film.

The invention relates to a preparation method of wheat germ blancmange. The preparation method comprises the following steps of taking 10 parts by weight of wheat germs, soaking the taken wheat germsin 90-100 parts by weight of water for 2 hours, and then performing superfine crushing to obtain micronized liquid of which the granularity D50 is smaller than or equal to 5[mu]m; adding 0.18-0.3 partby weight of a composite emulsifying agent and milk powder, performing placing in a homogenizing machine, and performing homogenizing twice so as to obtain homogenizing liquid; taking 0.72-1.0 part by weight of blancmange powder and 13.5-20 parts by weight of white granulated sugar, and performing mixing so as to obtain a mixture; adding the mixture to the homogenizing liquid, performing heatingto a boiling state, and maintaining the micro boiling state for 5-10min so as to obtain wheat germ blancmange liquid; and performing cooling to 50-60 DEG C, and adding 0.1-0.11 part by weight of a sour agent and 0.001-0.0011 part by weight of wheat-fragrance essence. The wheat germ blancmange prepared by the method has nutrient components of the wheat germs, and is fine and smooth in mouth feel, tender, smooth and plump in shape. Besides, the method is simple in steps, and the wheat germ blancmange is convenient to prepare.

A composite structure with porous metal comprises a porous metal structure and a carbon nanotube structure comprising a plurality of carbon nanotubes, the carbon nanotube structure is fixed on surface of the porous metal structure, and the porous metal structure and the carbon nanotube structure are shrunk together to form a plurality of wrinkled parts.

An end-use casting of a high chromium white iron, i.e. a casting that has been heat-treated, includes a ferrous matrix and Oat least two different chromium carbides dispersed in the matrix, with at least one of the chromium carbides including a transformation product of an as-cast chromium carbide.