49results about How to "Improve impact and wear resistance" patented technology

Disclosed is a preparing method for casting an inlaid ceramic/metal wear-resisting compound liner. A chemical vapor deposition method is adopted to prepare uniform, continuous and high-purity metal activation coatings on ceramic monomers in various shapes, the kind and the structure of the coatings are changed, wettability between ceramic and metal in the compound process is improved, and the compound quality is improved; finally, through the lost foam casting technology, that is, ceramic reinforcements with the metal activation coatings deposited are fixed into a polystyrene foam model, and casting molding of molten metal is carried out; solid ceramic serves the reinforcements, the ceramic reinforcements are subject to reasonable structural design, and volume fractions and distribution of the reinforcements are controlled; and through forming of the activation coatings on the surfaces of the ceramic reinforcements, the interface combination condition between the ceramic and the metal is improved, operation is simple, easy to implement and low in cost, and the inlaid ceramic/metal wear-resisting compound liner which is good in comprehensive performance and capable of meeting various complex working conditions can be prepared.

The invention provides an impact-resistant and anti-wear agent for hydraulic concrete, which mainly comprises a nano material, slag, latex powder, rubber powder, a water reducing agent, fibers, an exciting agent and a defoaming agent. The impact-resistant anti-wear agent is suitable for places such as water conservancy projects, roads and airport pavements requiring high impact-resistant and anti-wear concrete, has the functions of resisting crack, reducing water, reinforcing and reducing elasticity, and excellent mixing and constructing properties. The impact-resistant and anti-wear agent has the advantages of increasing concrete impact-resistant and anti-wear properties, prolonging maintenance period and reducing maintenance cost.

The invention relates to a method for preparation of rare earth-modified carbon nano-tube /polyimide composite, which consists of performing mat-forming treatment of modifying property to carbon nano-tube adopting rare earth modifier first, then laying the disposed carbon nano-tube into the ball grinder to mill, afterwards, mechanically blending the carbon nano-tube and the polyimide powder and controlling the percentage by weight of the carbon nano-tube to occupy 1-10 % of the mixed powder, then laying the mixed powder into the stainless steel die for press forming, finally preparing the composite by high-sintering. Thereinto, the rare earth modifier consists of rare-earth compound, alcohol, ethylene diamine tetraacetic acid, ammonii chloridum, aqua fortis and aquacare. The invention is of simple technique and low cost, is non-contamination, and the prepared composite possess good dynamic property and frictional behavior.

The invention discloses a high manganese steel which contains tungsten, and the high manganese steel contains chemical constituents in the following mass percent: C: 1.05%-1.35%, Si: 0.3%-0.9%, Mn: 11%-19%, W: 0.5%-1.5%, P<=0.070% and S<=0.045%, and the rest is Fe, furthermore, the high manganese steel also can contain a rare earth element RE, and the content of the RE is 0.01%-0.3%. The high manganese steel also can contain Cr and the content of the Cr is 1.2-2.5%. The high manganese steel which contains the tungsten of the invention is added with the elements of tungsten, rare earth element RE and chrome in particular when the content of the Mn is 16%-19%, which enables the whole high manganese steel to have the advantages of good toughness, high yield strength, high work hardening degree, better abrasive resistance and the like compared with the existing steel, and thereby the application range of the high manganese steel is enlarged. The high manganese steel of the invention is suitable for preparing fitting parts which are used in the working condition of abrasion and in particular to impact abrasion.

The invention discloses a modified cement-based antishock wear-resistant material and preparation and application methods thereof. The modified cement-based antishock wear-resistant material comprises the following components in percentage by mass: 5 to 10% of polyoxyethylene ether, 20 to 30% of anionic active agent, 30 to 40% of carrier and 30 to 40% of nanometer polar silicon modifying material. The preparation method comprises the following steps of: compositing polyoxyethylene ether and the anionic active agent onto the carrier; adding the nanometer polar silicon modifying material to the obtained composite; and homogenizing to obtain the modified cement-based antishock wear-resistant material. The application method comprises the following steps of: uniformly mixing weighed sand and aggregate; adding cement, fly ash and the modified cement-based antishock wear-resistant material; uniformly agitating; adding mixing water and a water reducing agent; and uniformly mixing to obtain concrete. The modified cement-based antishock wear-resistant material has high antishock wear-resistant performance; the preparation method is simple and mild in conditions; the process parameters are easily controlled; the yield is high; and the production cost is low.

The invention discloses boracic wear-resisting alloy steel and a preparation method thereof. The boracic wear-resisting alloy steel is prepared from, by mass percent, 0.20%-0.5% of C, 2%-6% of Cr, 0.4%-1.0% of Si, 3.0%-5.0% of Mn, 0.3%-2.5% of B, 0.2%-1.2% of Cu, 0.2%-0.6% of Ti, 0.05%-0.25% of Ca, 0.03%-0.3% of ReSiMg, 0.02%-0.18% of N, 0.05%-0.3% of Nb, 0.03%-0.08% of Al, 0.04%-0.13% of K, smaller than 0.03% of S, smaller than 0.04% of P and the balance Fe. Melting is carried out through an intermediate frequency furnace until the temperature ranges from 1,560 DEG C to 1,620 DEG C, ferrovanadium, ferrotitanium, potassium oxide, a silicon-calcium-barium alloy and nitrogen containing ferrochromium which are 60 meshes to 100 meshes, BC, BN, B2O3, Si3N4, Al and ReSiMg are matched according to the mass percent and then rolled into a metal cored wire with the diameter ranging from 8 mm to 15 mm through low-carbon steel with the thickness ranging from 0.12 mm to 0.25 mm, the metal cored wire is added into smelted molten steel as a boron supplying agent for boron supplying and metamorphic inoculation treatment, and the casting temperature of the molten steel ranges from 1,400 DEG C to 1,450 DEG C; and a casting is subjected to heat preservation for 2-4 hours at the temperature ranging from 920 DEG C to 1,150 DEG C, and air cooling is carried out to room temperature. The boracic wear-resisting alloy steel is good in strength, hardness, toughness, heat fatigue resistance and wear resistance and low in production cost.

The invention belongs to the technical field of wear-resisting metal materials, and discloses an anti-corrosion wear-resistance high chrome cast iron alloy and a preparing method thereof. The method comprises the steps of raw material preparing, atomizing mixing powder making, mould pressing blank making, variable temperature sintering, heat treatment cooling, mixture treatment, and finished product making. Through adjusting of the raw material proportion of the blank of the high chrome cast iron alloy, the corrosion resistance and impact resistance are improved, before casting, sulphur powderis used for hardening and tempering, in cooperation with the heat treatment process, the phenomenon that much carbide is precipitated from austenite is avoided, a condensation structure is fine, thegood mechanical property is achieved, the matrix structure, the graphite size, the graphite shape and graphite distribution are improved, corrosion resistance is obviously improved, and the hardness of the high chrome cast iron alloy blank can be improved; and through the mixture, the surface of the high chrome cast iron alloy is modified, the absorption impact resistance capacity of the high chrome cast iron alloy is improved while the hardness of the high chrome cast iron alloy is ensured, and accordingly the wear resistance is improved.

The invention relates to a reinforcing method of concrete structure beam column nodes, in particular to a method aiming at reinforcing beam column nodes in which both space structure and stress are complex. The reinforcing method of the concrete structure beam column nodes comprises the following steps: chopped fiber, concrete and water are mixed and stirred into a mixture and accelerator is added on a nozzle of an injection machine and injected to the beam column nodes. Alternatively, the reinforcing method of the concrete structure beam column nodes can comprise the following steps: chopped fiber reinforce plastic (FRP) fiber, epoxy resin and additive are mixed and stirred into a mixture and the mixture is injected to the beam column nodes by the injection machine to reinforce the nodes. The reinforcing method of the concrete structure beam column nodes can reinforce the beam column nodes which is complex in space structure without being affected by shape and scale of construction elements; intensity of an injection layer is high, and toughness is good; rebound rate of dry materials in the construction process is low, construction time is greatly shortened, loss of the dry materials is reduced, and environment is not polluted; no external template is needed to arrange in construction, anchorage and erecting reinforcement fabric is not needed, massive materials are saved, a template arranging procedure is removed, and construction is convenient, simple and rapid. The reinforcing method of the concrete structure beam column nodes can be applied not only to reinforcing beam column nodes but also to rapid repairing after an earthquake.

The invention discloses a high-tenacity boron-containing high-chromium abrasion-resistant alloy and a preparation method thereof. The high-tenacity boron-containing high-chromium abrasion-resistant alloy comprises, by mass, 0.20%-0.6% of C, 15%-20% of Cr, 0.5%-1.10% of Si, 3.5%-6.0% of Mn, 0.4%-2.3% of B, 0.4%-1.5% of Cu, 0.3%-1.2% of Ti, 0.10%-1.0% of V, 0.05%-0.3% of Nb, 0.05%-0.10% of Al, 0.10%-0.25% of Ca, 0.05%-0.2% of Y, 0.05%-0.3% of Ce, 0.04%-0.20% of N, 0.05%-0.15% of K, 0-0.03% of S, 0-0.04% P, and the balance Fe. Scrap steel and ferrochromium are smelted to the temperature of 1560 DEG C to 1620 DEG C by using an intermediate frequency furnace, after ferrovanadium, ferrotitanium, potassium oxide, silicon-calcium-barium alloy, ferrochromium containing nitrogen, Al, BC, BN, B2O3, Si3N4, Ce and Y in 60 meshes to 100 meshes are proportioned together according to the mass percent, the mixture is rolled into metal cored wires of which the diameters range from 8 mm to 15 mm through the adoption of low-carbon steel of which the thickness ranges from 0.12 mm to 0.25 mm, the metal cored wires serving as a boron supplying agent are added into smelted molten steel, then boron is added, and modifying inoculation is conducted. The molten steel pouring temperature is 1400 DEG C to 1450 DEG C, heat preservation is conducted on a casting for 2 h to 4 h at the temperature of 920 DEG C to 1150 DEG C, and then the casting is subjected to air cooling to the room temperature. The high-tenacity boron-containing high-chromium abrasion-resistant alloy has the advantages of being good in strength, hardness, tenacity, thermal-fatigue resistance and abrasion resistance and low in production cost.

The invention provides a vertical shaft slip form concrete calendaring device and calendaring method. The vertical shaft slip form concrete calendaring device comprises a vertical shaft slip form arranged in a vertical shaft and vertically sliding along the inner wall of the vertical shaft; an annular first working platform connected with the vertical shaft slip form is arranged under the verticalshaft slip form; the first working platform is provided with an arc-shaped track, and the arc-shaped track is coaxial with the vertical shaft; the vertical shaft slip form concrete calendaring deviceis further provided with a walking trolley moving along the arc-shaped track; the walking trolley is provided with a calendaring device used for performing calendaring on the inner wall of the vertical shaft; and the walking trolley is further provided with a spraying device used for performing spraying on the inner wall of the vertical shaft. The vertical shaft slip form concrete calendaring device and calendaring method meets the construction requirements of circular cross section curvature and finish degree of the vertical shaft, prevents hydraulic building concrete early shaping cracks and eliminates tiny air holes.

The invention provides a high-toughness impact-resistant and wear-resistant repairing material which is mainly prepared from 26.0 to 36.0 percent of portland cement, 5.0 to 7.5 percent of ultrafine powder, 52.0 to 61.0 percent of iron ore, 1.5 to 4.0 percent of fiber, 0.01 to 0.03 percent of a coupling agent, 0.1 to 0.3 percent of rubber powder, 0.8 to 1.2 percent of a volume stabilizer, 0.1 to 0.2 percent of a polycarboxylate water reducing agent, 0.01 to 0.03 percent of a defoaming agent and the like. The high-toughness impact-resistant and wear-resistant repairing material provided by the invention has the advantages of low price, convenient construction, high impact toughness, high impact strength, high bonding strength, low shrinkage and high crack resistance, has a linear expansion coefficient close to that of concrete, cannot fall off from a base material, and can replace organic materials such as epoxy resin mortar and the like.

The invention belongs to the technical field of wear-resistant metal materials, and particularly relates to high-strength high-toughness wear-resistant high-chromium cast iron and a preparation method thereof. The cast iron comprises the following chemical components in percentage by weight: 2.5 to 3.5 percent of C, 0.5 to 1.0 percent of Si, 15 to 18 percent of Cr, 0.4 to 0.6 percent of B, 0.3 to 0.5 percent of Nb, 0.3 to 0.5 percent of Ti, 0.6 to 1 percent of K/Na, 0.3 to 0.5 percent of Re and the balance of Fe. By adding effective alloy elements and carrying out modification treatment, the high-chromium cast iron provided by the invention can refine a matrix structure, improves the form and distribution of corresponding carbides to improve the strength and toughness of the high-chromium cast iron, and can improve the wear resistance of the high-chromium cast iron. The macrohardness of the cast iron provided by the invention is as high as 63 HRC to 66 HRC, and the impact toughness of the cast iron is as high as 13.5 J/cm<2> to17.5 J/cm<2>.