36results about How to "Increase hardening rate" patented technology

The invention provides a phenolic resin composition for a stemming and a preparation method of the composition. According to the method, 30-50wt% of thermosetting phenolic resin, 5-20wt% of organic solvent and the balance of a carbon-containing organic binder are mixed to obtain the phenolic resin composition for stemming. The invention further provides a stemming. The stemming comprises a refractory aggregate and a binding agent, wherein the binding agent is the phenolic resin composition provided by the invention. According to the phenolic resin composition for the stemming, the thermosetting phenolic resin and the carbon-containing organic binder are mixed and used together, and the proportions of the thermosetting phenolic resin and the carbon-containing organic binder are controlled in the specified ranges, and then an appropriate amount of the organic solvent is added, so that the stemming has a moderate curing speed. Moreover, the stemming comprising the phenolic resin composition provided by the invention has the advantages of good plasticity and cohesive property, proper porosity, small high-temperature volume shrinkage, good sintering performance, high strength, scouring resistance, erosion resistance, good opening performance and the like and hardly causes environmental pollution.

A photo-curing conductive adhesive for a touch panel includes an adhesive in an amount within the range of 20 to 30 wt % and the metal particle composition in an amount within the range of 70 to 80 wt %.

This document describes a process / strategy for age hardening nickel based alloys to create desirable properties with reduced energy expenditure. The inventive process introduces isolated atom nucleation sites to accelerate the nucleation rate by approximately 36 times, thereby permitting age hardening to occur in significantly less time and with significantly less energy expenditure.

The invention relates to an expansion alloy material and an expansion pipe device for petroleum oil wells. The composition of the expansion alloy material is: C: 0.03-0.5; Si: 0-6.0; Mn: 0-15; Cr: 0-20; Ni: 0-20; N: 0.02-0.08; P≤0.03; S≤0.03; mixed rare earth: 0.1; Ti: 0-0.8; Zr: 0-1.47; the balance is Fe. The total amount of TiC and ZrC carbides in the alloy is 0.1-1.5%. Its strong plasticity K=σ・δ can reach 3800MPa%; the shape memory connection of the expansion tube can still maintain a good sealing state after the diameter is expanded, and the internal pressure resistance of the expansion tube is close to 50MPa; the bullet piston, centralizer and hydraulic anchor fixing mechanism in the process device etc., simple in structure, stable in operation and easy to use. This invention is of great significance for oil drilling, well completion and repair of long well sections, and also has important popularization value for other pipeline repairs.

The present invention discloses one kind of coated low-nitrogen sand and its preparation process. The coated low-nitrogen sand consists of phenolic resin 1.5-4.0 wt% of the material, hexamethylene tetramine in 0-6 wt% of the phenolic resin, lubricant in 3-7 wt% of the phenolic resin, and raw sand for the rest. It has greatly lowered hexamethylene tetramine consumption, low nitrogen content and capacity of ensuring the surface quality of the casting. During its heated formation, the thermosetting phenolic resin can speed the curing, raise the hardening rate and raising the hot strength of the sand mold.

The invention discloses a peeling-resistant coated sand and a preparation method thereof. The shell-resistant coated sand is characterized in that it comprises raw sand, a binder accounting for 1 to 4% of the mass of the raw sand, 1 to 15% of a curing agent based on the mass of the binder, and 0.1 to 0.5% of Coupling agent, 0.1-1.0% additive. The additive added in the present invention can increase the curing rate of the curing agent to the binder, increase the hardening rate of the coated sand, and reduce the tendency of shelling. By optimizing the content of each component, the overall strength of the coated sand can be improved, and the gas generation of the coated sand can be greatly reduced, and core penetration defects can be reduced. The coated sand of the present invention has strong anti-shelling ability, high strength and low gas generation. It can significantly reduce or eliminate defects such as shelling and core penetration, effectively improve the quality of the inner and outer surfaces of the shell core, and is suitable for the production of shell core sand cores.

The invention relates to wear-resistant steel for an ore slurry delivering welded pipe line and a manufacturing method thereof. The wear-resistant steel comprises the following components in percentage by weight: 0.04-0.10% of C, 1.00-1.70% of Mn, 0.20-0.60% of Cr, no more than 0.025% of Ti, no more than 0.06% of Nb, 0.02-0.06% of V, 0.10-0.40% of Si, no more than 0.05% of Al, no more than 0.008% of N, no more than 0.015% of P, no more than 0.008% of S and the balance of Fe and inevitable impurities; Pcm is no more than 0.18%, the steel plate is in a multiphase complex tissue of acicular ferrite+bainite+MA, and micro VC second-phase high-hardness particles are dispersed and precipitated in the tissue; and the transverse yield strength Rt0.5 of the steel plate is 490-705 MPa, the transverse tensile strength Rm is 570-825 MPa, and the yield ratio is Rt0.5 / Rm(0.85, hardening index n)1.10. According to the invention, the steel plate is simple in chemical composition and low in production cost, and the low carbon equivalent is beneficial to weldability; and due to the low yield ratio, the steel plate has the characteristics of easy pipe forming, high hardening index, high wear resistance and the like, and the wear resistance is almost doubled in comparison with a common line pipe.