40results about How to "Good cold deformation ability" patented technology

The invention discloses a 10.9-grade boron-containing spheroidizing-free cold heading steel wire rod and a manufacturing method thereof. The wire rod comprises the following components in percentage by weight: 0.23 to 0.33 percent of C, 0.02 to 0.20 percent of Si, 0.50 to 0.90 percent of Mn, less than or equal to 0.025 percent of P, less than or equal to 0.025 percent of S, 0.005 to 0.040 percent of Al, 0.005 to 0.050 percent of Ti, 0.0005 to 0.0035 percent of B, 0.58 to 1.50 percent of Cr, 0.01 to 0.05 percent of Ni and the balance of iron and impurities, and also comprises 0.01 to 0.05 weight percent of V preferably. The manufacturing method sequentially comprises the following steps of: smelting; refining outside a furnace; continuously casting; performing high-speed wire controlled rolling; and cooling. The wire rod has the advantages of low hardness, good plasticity, high cold deformability, high hardenability and the like; and the preparation process is simple, and low in cost. In the process of preparing a fastener from the wire rod, a spheroidizing process before drawing can be saved, and the effects of saving energy, reducing pollution, improving yield and reducing use cost are achieved. The product completely meets the production and use requirements of 10.9-grade fasteners.

The invention discloses a Cu-Fe in-situ composite with boron, silver and rare earth elements added and a preparation method thereof. The invention is characterized by adopting multimode comprehensive strengthening technology such as multi-micro alloying, solid solution strengthening, aging strengthening, fine grain strengthening, distortion strengthening, fiber strengthening and the like, using Cu as the base and adding a little Fe and trace Ag and B, rare earth or rare earth compounds to prepare the high strength and high conductivity copper alloy material through smelting, casting, hot forging or hot rolling, solid solution treatment, cold rolling or cold drawing, aging and the like. The prepared material has the advantages of high strength, good electric and thermal conductivity, simple preparation process and low cost, thus realizing wide application in the fields such as electronics, information, transportation, energy, metallurgy, electromechanics and the like.

This invention relates to a high-strength and high-toughness maraging stainless steel, whose chemical composition is: C less than or equal to 0.02 wt.%, Si less than or equal to 0.1 wt.%, Mn less than or equal to 0.1 wt.%, S less than or equal to 0.01 wt.%, P less than or equal to 0.01 wt.%, Cr 10.0-11.5 wt.%, Ni 11.7-12.5 wt.%, Mo 0.5-2.0 wt.%, Ti 1.2-1.7 wt.%, Al 0.02-0.5 wt.%, and Fe as balance. The strength of the maraging stainless steel is 1700-1800 MPa. The maraging stainless steel has such advantages as low cost, high strength, high fracture toughness, and high corrosion resistance.

This invention discloses a method of preparing NiAl shape memory alloy thin film through cold rolling ultrathin lamination alloying. Good plasticity, easy deformed Al foil, Ni foils are materials, and foil thickness is defined according to atom constitution formula Ni1-XAlX. Metal foils are alternating laid, sandwich structure is got after big deformation cold rolling, it is repeated again and again, and finally components uniform alloy film is got after diffusion annealing alloying. The reactant ratio is 0.30íœxíœ0.40. The film components made by this method is easy control, crystal grain is small, fatigue life is high, area is large and cost is low.

The invention relates to a drahtstahl for a fastening piece and a production method thereof, and the drahtstahl comprises the following components by weight percent: 0.39-0.48 % of C, 0.15-0.35% of Si, 0.30-0.90% of Mn, 0.60-1.20% of Cr, 0.010-0.07% of Als, less than or equal to 0.035% of P, less than or equal to 0.035% of S and the balance Fe and unavoidable impurity; and the production method comprises the following steps: smelting with a clean steel process and casting into a blank, and adding Si-Ca line in the refining; heating the continuous casting to 980-1,080 DEG C; rough rolling: controlling the deflection to be 70-80%; intermediate rolling: controlling the deflection to be 80-90%; pre-precision rolling: controlling the deflection to be 65-75%; water-cooling until the temperature is cooled to be 1,000-1,020 DEG C; precision rolling: controlling the deflection to be 60-90%; water-cooling for the second time until the temperature is cooled to be 800-900 DEG C; spinning; cooling to phase change initial temperature, namely the range from Ar3 to 50 DEG C higher than Ar3 by adopting an aerial fog mixed method; and continually cooling until the temperature is cooled to be 400-500 DEG C and naturally cooling to environment temperature. The invention can be drawn directly, has good cold deformation and is not easy to crack.

The invention was involved in the method to preparation of TiNiCu shaped memory alloy firm by cold roll ultrathin lamination alloying. Using Ti foil, Ni foil, Cu foil and NiCu foil as the rough material which has good plastic nature that easy to distortion. The thickness of foil determined according to Tix(Nil-yCuy)1-x. The foils were placed by mutual overlap, and the ultrathin sandwich structure formed by cool roll. The ultrathin structure was repeated cool rulled. The foil that has a homogeneous ingredient was gained after diffusion annealing. The ingredient has the quality of 0.45<=x<=0.55, 0<=y<=0.6. Its advantages: ingredients easy to be controlled and has a small crystal grain; has a long endurance life, a large area and a low cost.

The invention discloses a Cu-Cr in-situ composite with boron, silver and rare earth elements added and a preparation method thereof. The invention is characterized by adopting multimode comprehensive strengthening technology such as multi-micro alloying, solid solution strengthening, aging strengthening, fine grain strengthening, distortion strengthening, fiber strengthening and the like, using Cu as the base and adding a little Cr and trace Ag and B, rare earth or rare earth compounds to prepare the high performance copper alloy in-situ composite through smelting, casting, hot forging or hot rolling, solid solution treatment, cold rolling or cold drawing, aging and the like. The prepared material has the advantages of high strength, good electric and thermal conductivity, simple preparation process and low cost, thus realizing industrial application in the aspects such as electrician switches, contact materials, resistance electrodes, rotor conductors of large electrical high speed turbine generators, overhead conductors of electric cars and electric trains, lead frames of very large scale integrated circuits and the like.

A high-carbon steel wire has as steel composition: a carbon content ranging from 0.40 weight percent to 0.85 weight percent, a silicon content ranging from 1.0 weight percent to 2.0 weight percent, a manganese content ranging from 0.40 weight percent to 1.0 weight percent, and a chromium content ranging from 0.0 weight percent to 1.0 weight percent. The remainder is iron. This steel wire has as metallurgical structure a volume percentage of retained austenite ranging from 4 percent to 20 percent, while the remainder is tempered primary martensite and untempered secondary martensite. The steel wire is obtained by partitioning after quenching.

The invention discloses non-oriented electrical steel for a hub motor of a portable electric bicycle and a manufacturing method of the non-oriented electrical steel, and belongs to the field of non-oriented steel. In order to solve the problems of high processing difficulty and low efficiency of existing non-oriented steel for a small motor, the invention provides the non-oriented electrical steel for the hub motor of the portable electric bicycle. The non-oriented electrical steel for the hub motor of the portable electric bicycle is prepared from the following components in percentage by weight: 1.50-3.00% of Si, 0.50% to 2.00% of Als;, 0.20% to 1.00% of Mn, 0.01% to 0.20% of P, less than or equal to 0.005% of C, less than or equal to 0.03% of S, less than or equal to 0.03% of N, less than or equal to 0.005% of Ti, and the balance of iron and inevitable impurities, wherein the weight percentage of C, S, N and Ti meets the following formula: C% + S% + N% + Ti% is less than or equal to 0.01%. According to non-oriented electrical steel for the hub motor of the portable electric bicycle, the ductility of silicon steel is improved by reasonably controlling the element content, and machining is convenient. According to the manufacturing method of the non-oriented electrical steel, eddy current and magnetic hysteresis loss in a wound iron core is reduced, meanwhile, surface oxidation and surface nitride precipitation of a steel coil can be avoided, and the iron core loss is reduced; compared with existing non-oriented silicon steel with the same iron loss level, the elongation is higher, the subsequent cold machining performance is more excellent, and the machining is convenient while the excellent performance is ensured.

The invention opened thea. method to make TiNiPd shape-memory alloy firm by the cold-roll ultrathin laminated alloy. The method is to use the Ti foil, Ni foil or NiPd as the material, and decidethe thickness according to the Tix(Ni1-yPdy)1-x. The foil is interactively overlapped and cold-rooled to form the ultrathin laminated alloy. The content satisfies 0.48<=x<=0.5; 0.4<=y<=0.8 respectively. The alloy firm has the good features of fine crystal, long life, big area and low cost.

The invention provides a production process of an aluminum alloy gutter profile, and belongs to the technical field of aluminum alloy profile production. The production process comprises an ingot casting procedure, an extrusion forming procedure, a quenching treatment procedure, a stretching and straightening procedure and an aging treatment procedure which are sequentially carried out, wherein a preliminary heat treatment procedure is added between the ingot casting procedure and the extrusion forming procedure, and the preliminary heat treatment procedure comprises the following steps that a blank formed after the ingot casting procedure is heated to 610-630 DEG C, then the temperature is reduced to 585 +/- 5 DEG C, the heat preservation is carried out for 2.5-3.5 hours, and finally, the blank is rapidly cooled to the room temperature. According to the production process, after a bar material is formed in the ingot casting procedure, the bar material is subjected to the preliminary heat treatment procedure, so that the intracrystalline segregation can be eliminated or reduced, the thermal deformation and cold deformation capacity of the material is improved, the mechanical property of a product is improved, and the internal stress generated during solidification is eliminated.

The invention discloses a method for preparing a high silicon steel thin strip by powder extrusion. Reduced Fe powder and 50-70% of high-purity silicon iron powder are used as raw materials to form Fe-Si mixed powder with the Si content being 4.5-6.7%. The mixed powder is subjected to mold-pressing to form a square billet which is then heated to 950-1050 DEG C to achieve Fe phase austenitizing, and the square billet is hot-extruded into a slab with the deformation amount under the extrusion ratio of 8-16. The extruded slab is then subjected to vacuum or reducing atmosphere protective sinteringin a temperature range of 1060-1160 DEG C, so that Fe powder particles are metallurgically bonded, Si and Fe are partially alloyed, and dense poor-Si alpha-Fe crystal grains with plastic deformationcapacity and a brittle multi-phase structure high silicon steel billet with the high-Si phase are formed; and several times of cold rolling and low-temperature diffusion sintering are performed, thenvacuum or reducing atmosphere protective sintering is performed at the temperature of 1270-1320 DEG C, and the high silicon steel strip with 4.5-6.7% Si is obtained, and the thickness is 0.1-0.5mm andthe density is more than or equal to 7.39g/cm3.

This invention relates to an ultrahigh-strength and corrosion-resistant structural steel, whose chemical composition is: C less than or equal to 0.02 wt.%, Si less than or equal to 0.15 wt.%, Mn less than or equal to 0.15 wt.%, S less than or equal to 0.01 wt.%, P less than or equal to 0.01 wt.%, Cr 8.0-10.0 wt.%, Ni 11.5-14.5 wt.%, Mo 0.5-2.5 wt.%, Ti 1.0-2.0 wt.%, Al 0.02-0.5 wt.%, and Fe as balance. The strength of the structural steel is 1800-1900 MPa. The structural steel has such advantages as low cost, high strength, high fracture toughness, and high corrosion resistance.

The invention provides an anti-radiation dry-mixed mortar and a preparation method thereof. The anti-radiation dry-mixed mortar comprises, by weight, 25 to 32 parts of cement, 40 to 70 parts of barite sand, 2 to 33 parts of yellow sand, 1.3 to 2.3 parts of ternary hybrid fiber of iron-boron nanometer alloy fiber, glass-reinforced plastic fiber and Durafiber, and 0.5 to 2 parts of an additive. According to the invention, the ternary hybrid fiber of iron-boron nanometer alloy fiber, glass-reinforced plastic fiber and Durafiber used in the invention can effectively restrict generation and development of primary fractures formed in early-stage concrete due to factors like separation, bleeding and contraction, so generation of the primary fractures and the quantity and size of the primary fractures are reduced from a source, compactness of concrete is greatly improved, effective filling of different levels of fractures in a concrete matrix are realized, and the performance of an interface transition layer is further improved. Experiment results show that the anti-radiation dry-mixed mortar prepared in the invention has good radiation protection performance and mechanical properties.

This invention discloses a method of preparing NiTiHf shape memory alloy thin film through cold rolling ultrathin lamination alloying. Good plasticity, easy deformed Ni foil, Ti foil, Hf foil or TiHf alloy foil are materials, foil thickness is defined according to atom constitution formula NiX (Ti1-yHf1-y)1-X. metal foils are alternating laid, sandwich structure is got after big deformation cold rolling, it is repeated again and again, finally components uniform alloy film is got after diffusion annealing alloying. The reactant ratio is 0.04íœxíœ0.55, 0íœyíœ0.8. The film components made by this method is easy control, crystal grain is small, fatigue life is high, area is large and cost is low.

Disclosed is a method for preparing a high-silicon steel strip through high-temperature diffusion sintering and powder extrusion. The method comprises the steps that two kinds of industrial Fe powderof reduced Fe powder and water atomized Fe powder are selected and mixed according to the proportion of 4:6-6:4, then fine Si powder is added as raw powder, and thus Fe-Si mixed powder is formed withthe Si content being 4.5%-6.7%; a square blank is formed through die pressing, heating is conducted till the temperature reaches 950-1050 DEG C, thus a Fe phase is austenitized, and the square blank is subjected to hot extrusion into a slab through deformation with the extrusion ratio being 8-16; then the powder extruded slab is sintered under vacuum protection or reducing atmosphere protection atthe temperature of 1080-1180 DEG C for metallurgical bonding of Fe powder particles; and after the multiple times of cold rolling and low-temperature diffusion sintering, sintering is conducted undervacuum protection or reducing atmosphere protection at the temperature of 1280-1350 DEG C finally, homogeneous alloying of high-silicon steel is achieved, and thus the high-silicon steel strip with the Si content being 4.5%-6.7%, the thickness being 0.1-0.5 mm and the density being larger than or equal to 7.39 g/cm<3> is obtained.

The invention discloses a method for preparing a Fe-6.5% Si strip by powder extrusion and diffusion sintering processes. The method comprises the steps that reduced Fe powder and water atomized Fe powder are selected and mixed according to the ratio of 4:6-6:4, then high-purity ferrosilicon powder with the Si content of 70-80% is added to form Fe-4.5-6.7% Si mixed powder; and mold pressing is carried out to form a square blank, then the square blank is heated to 950-1050 DEG C to realize Fe-phase austenitizing, hot extrusion is carried out by using the deformation amount with the extrusion ratio being 8-16 to form a slab, then vacuum or reducing atmosphere protection sintering is carried out at the temperature of 1070-1170 DEG C to make Fe powder particles realize metallurgical bonding, cold rolling and low-temperature diffusion sintering are carried out for multiple times, finally vacuum or reducing atmosphere protection sintering is carried out at the temperature of 1275-1335 DEG C to realize homogenization alloying of the high silicon steel, and the high silicon steel strip with 4.5-6.7% of Si, the thickness of 0.1-0.5 mm and the density larger than or equal to 7.40g/cm<3> is obtained.

The invention discloses high-strength heat-conductive plastic and a preparation method thereof. The high-strength heat-conductive plastic comprises the following raw materials in parts by weight: 65-80 parts of unsaturated polyester, 11-15 parts of 2,3,6,7-tetracarboxylic acid dianhydride triptycene, 10-15 parts of 2,4-diamino-diphenylmethane, 3-7 parts of 4,4-dichlorodiphenyl sulfone, 4-8 parts of zinc dioxide, 5-10 parts of citric acid and 6-10 parts of green algae. The high-strength heat-conductive plastic provided by the invention has high mechanical strength and good heat deformation andcold deformation performance, can be used in a high temperature or low temperature environment, has wide application prospects, is simple in preparation method, and facilitates the realization of industrial production.

The invention provides a method for preparing a Fe-6.5%Si strip material by diffusion sintering and powder extrusion. The method for preparing the Fe-6.5%Si strip material by the diffusion sintering and the powder extrusion comprises the steps of selecting reduction Fe powders and water-atomized Fe powders, then mixing the reduction Fe powders and the water-atomized Fe powders in the ratio of 4:6- 6:4, and adding high-purity ferrosilicon powder with the Si content of 50-70% to form Fe-4.5-6.7%Si mixed powders; then die pressing the Fe-4.5-6.7%Si mixed powders into a square blank, then heatingthe blank to 950-1050 DEG C to realize the austenization of Fe phase, and hot extruding the blank into a plate blank by the deformation quantity with the extrusion ratio of 8-16; and conducting vacuum or reducing atmosphere protection sintering at the temperature of 1060-1160 DEG C and conducting cold rolling and low temperature diffusion sintering for many times; finally conducting vacuum or reducing atmosphere protection sintering at the temperature of 1260-1320 DEG C to realize the homogeneity alloying of high silicon steel and obtaining a high silicon steel strip material with the thickness of 4.5-6.7%Si being 0.1-0.5 mm and the density being equal to or greater than 7.41g/cm3.