51results about How to "Increase Fe content" patented technology

The invention provides a super-soft aluminum alloy conductor and a preparation method thereof. The aluminum alloy conductor comprises the following materials in percentage by weight: 0.3 to 1.5 percent of Fe, 0.001 to 0.3 percent of Be, 0.005 to 0.6 percent of Cu, 0.1 to 1.5 percent of rare earth, less than or equal to 0.08 percent of Si, less than or equal to 0.15 percent of total inevitable impurities, and the balance of aluminum. The aluminum alloy is drawn into an aluminum alloy wire by melting, continuous casting and continuous rolling, and the aluminum alloy wire is put into an annealing furnace and annealed for 20 to 40 hours at the temperature of between 380 and 420 DEG C to form the aluminum alloy conductor, wherein the annealing is performed in a sealed heat insulation device under the protection of nitrogen. The aluminum alloy has extremely good toughness and elongation performance, the coefficient of elongation reaches or exceeds 35 percent and even can reach 40 percent, and the electric conductivity can reach 60 percent IACS.

The invention relates to a high-saturation-magnetization iron-base amorphous nanocrystal soft magnetic alloy and a preparation method thereof. The alloy is expressed as FeaMbCucSixByPz, wherein M is one or more of Al, Cr, Mn, Ti and V; and 68<=a<=90, 0<=b<=6, 0<=c<=2, 3<=x<=20, 4<=y<=20, 0<=z<=10, and a+b+c+x+y+z=100. Compared with the prior art, the product has the advantages of high saturation magnetization and the like.

The invention discloses a low-cost, high-strength and high-plasticity metastable beta titanium alloy and a preparation method thereof. The titanium alloy comprises the following components in percentage by weight: 3-7% of Fe, 4-7.75% of Al, 3-5% of V, O not more than 0.2%, C not more than 0.08%, N not more than 0.05%, and the balance of titanium and inevitable impurities. The preparation method comprises the following steps: sponge titanium, an Al-V intermediate alloy, pure Al and pure Fe are weighed according to ratios; the raw materials are mixed to press as an electrode; a Ti-Al-Fe-V alloy cast blank is prepared by secondary smelting; the cogging and the primary forging are performed to obtain a large-scale forging; the secondary forging is performed to obtain a larger-size rod; the ternary forging is performed to obtain a small-size rod; the solid-solution treatment and the air cooling are performed; and then, the aging treatment and the air cooling are performed to obtain the low-cost, high-strength and high-plasticity metastable beta titanium alloy. The titanium alloy contains higher-content beta elements and stable elements Fe, and has such advantages as low cost, high strength and high plasticity.

The invention relates to a method for reducing cadmium content of rice seedling leaves, and a rice seedling nutrient solution recipe. The method comprises: (1) rice variety being Yangdao 6; (2) sowing seeds whose surfaces are disinfected to plugs which use vermiculite as medium, putting the plugs in a phytotron to culture for 1-2 weeks; (3) selecting rice seedlings to transplant in cultivating pots, the nutrient solution used for water planting being international rice nutrient solution and being added with microelements. Through discussing influence of external Fe and Mn on formation of rice seedling root iron plaque and on Cd absorption and transport and on rice seedling antioxidant enzyme activities, the method provides new thoughts for rice root iron plaque research and rice safety production on Cd polluted fields.

The invention belongs to the field of metal materials, and relates to an iron-based soft-magnet amorphous alloy with less components, low cost and high saturation magnetic induction intensity and a manufacturing process thereof. The iron-based soft-magnet amorphous alloy is prepared from the following components in atom percentage: greater than or equal to 5 percent and less than or equal to 12 percent of boron, greater than or equal to 3 percent and less than or equal to 10 percent of phosphorus, greater than or equal to 0.5 percent and less than or equal to 5 percent of tin, and greater than or equal to 80 percent and less than or equal to 84.5 percent of iron. The iron-based soft-magnet amorphous alloy is low in production cost, and is simple in process; the prepared iron-based soft-magnet amorphous alloy has the characteristics of high saturation magnetic induction intensity and low coercive force, is suitable for devices such as transformer cores, amorphous motors and the like, and is applied to the field of electric power, electronics, information, communication and the like.

The invention provides a super-strong high-plastic titanium alloy which comprises the following components in percentage by weight: 4.5 percent to 5.75 percent of Al, 3.0 percent to 5.0 percent of Mo,2.0 percent to 4.0 percent of Zr, 2.0 percent to 3.0 percent of Fe, 0.3 percent to 2.0 percent of Sn, 0.30 percent to 1.2 percent of Cr, less than or equal to 0.15 percent of O, and the balance Ti and trace impurities. The invention further provides a preparation method of the super-strong high-plastic titanium alloy. According to the super-strong high-plastic titanium alloy and the preparation method thereof provided by the invention, through simultaneously adding multiple multicomponent alloys, the tensile strength of the titanium alloy is improved to 1400MPa to 1550Mpa, meanwhile, the processing plasticity of the material is ensured, the elongation percentage is larger than 10 percent, and the reduction of cross sectional area is larger than 20 percent.

The present invention relates to utilization of nickel or copper smelting waste slag, particularly to a method for adopting nickel or copper smelting waste slag for ferrosilicon smelting. The method comprises: screening, wherein nickel or copper smelting waste slag is screened, and particles with a diameter of 2-5 mm are retained; smelting, wherein the screened nickel or copper smelting waste slag, silica, semi-coke and pellet ore are poured into a furnace to smelt; and iron discharging, wherein slag iron is separated. The method has the following effects that: the nickel or copper smelting waste slag for producing ferrosilicon is a good iron product furnace material; the waste resource reuse problem is well solved with the technical scheme; the Fe content in the nickel or copper smelting waste slag is high, such that consumption of steel chips, pellet ore or oxide skin and other iron products during the ferrosilicon smelting process is reduced so as to substantially reduce production cost and expand types of iron product furnace materials in ferrosilicon production; and positive effects are provided for ferrosilicon production and even the ferroalloy industry.

The invention discloses a heat-resistant regeneration die-cast aluminum alloy and a preparation method thereof, and belongs to the field of regeneration die-cast aluminum alloy preparation. The invention provides the heat-resistant regeneration die-cast aluminum alloy capable of reducing the preparation cost and the preparation method of the heat-resistant regeneration die-cast aluminum alloy. Chemical components of the heat-resistant regeneration die-cast aluminum alloy include 10.0%-12.0% of Si, 0.50%-0.75% of Ni, 0.95%-1.35% of Mg, 0.9%-1.4% of Fe, 0.20%-0.30% of Mn, 0.08%-0.12% of Cr, 0.015%-0.03% of B, smaller than or equal to 0.15% of an impurity element and the balance Al. The preparation method includes the steps that smelting is conducted; sampling is conducted to adjust the alloycomponents; refining is conducted after low-melting-point alloy addition; slag removal is conducted; and casting is conducted. According to the heat-resistant regeneration die-cast aluminum alloy andthe preparation method, Ni and Cu are replaced with the low-cost impurity element Fe, and the alloy cost is effectively reduced; and by means of the compound modification technology of the Mn, the Cr, the B and the like, the size of the iron-rich phase is refined, and the high-temperature strength of the alloy is ensured.

The invention discloses a planting method for improving growth and development and fruit quality of tomatoes. The planting method comprises the steps that tomato seedlings are cultivated; LED plant growth lamps are adopted as light sources to be arranged above the tomato seedlings for irradiation, and the light period every day is set to be 12 h illumination/12 h non-illumination or 16 h illumination/8 h non-illumination; when the tomatoes enter the flowering stage, an EDTA-Fe aqueous solution with the concentration of 100-200 [mu] mol.L <-1 > is sprayed to tomato plants, the EDTA-Fe aqueous solution is uniformly sprayed to the front and back surfaces of leaves once a week, and the tomato plants are irrigated with a nutrient solution containing no Fe element once every other month to ensure sufficient nutrients; and after the EDTA-Fe aqueous solution is sprayed for 55-65 days, when 80% of the tomatoes on the tomato plants turn red and peels are slightly soft, spraying of the EDTA-Fe aqueous solution is stopped. According to the planting method for improving growth and development and fruit quality of the tomatoes, the tomato quality improvement effect is optimal by spraying 100 to 150 [mu] mol.L <-1 > EDTA-Fe aqueous solution on the surfaces of the leaves in the photoperiod of 16 h illumination/8 h non-illumination.

The invention discloses a high Fe content Al-Mg2Si alloy prepared by laser selective melting and a preparation method. The Al-Mg2Si alloy is formed by Al-Mg2Si alloy raw material powder through a laser selective melting technology, the Al-Mg2Si alloy is composed of the following components by mass percentage: 5-5.5% of Mg, 2-2.2% of Si, 0.4-0.6% of Mn, 1-3% of Fe and the balance of aluminum, and the total mass percentage is 100%. According to the invention, the high Fe content Al-Mg2Si alloy is prepared by the laser selective melting technology skillfully, through using the characteristic thatthe cooling rate in the laser selective melting technology can reach 105-108 k/s, after alloy raw material powder is melted, the alloy is in non-equilibrium solidification at an extremely fast cooling rate, alloy elements are uniformly distributed, all elements have no segregation, and (Al+Mg2Si) ultrafine eutectic structures are uniformly formed, meanwhile, the formation of coarse Fe-rich intermetallic compounds is inhibited, fine Fe-rich intermetallic compounds are uniformly dispersed, and the high Fe content Al-Mg2Si alloy with excellent mechanical properties is obtained.

The invention discloses an aluminum alloy building formwork mainly comprising, by mass, 0.4%-1.0% of Si, 0.8%-1.3% of Mg, 0.05%-0.2% of Cu, 0.001%-0.15% of Mn, 0.2%-0.7% of Fe, less than or equal to 0.25% of Zn, 0.001%-0.1% of Cr, 0.03%-0.15% of Ti and the balance Al and inevitable impurities. The content of the inevitable impurities is less than or equal to 0.15%. Correspondingly, the invention further discloses a preparation method of the aluminum alloy building formwork. The aluminum alloy building formwork is excellent in mechanical property, the extrusion speed can reach 8-10 m/min, and the production efficiency is high.

The invention relates to a high-temperature alloy for a hydrogen fuel cell air compressor bearing, and a preparation method thereof. The high-temperature alloy adopts austenite with a disordered face-centered structure reinforced by adopting an ordered phase L12-gamma' and a body-centered tetragonal ordered structure gamma''-(Ni3Nb); the volume fraction of a reinforcement phase ranges from 10 percent to 25 percent; and the high-temperature alloy is prepared from the components in proportion by weight: 0.02 to 0.08 percent of C, 9 to 18 percent of Fe, 12 to 18 percent of Cr, 0.85 to 1.5 percentof Al, 1.2 to 2.25 percent of Ti, 3.5 to 5 percent of Nb, 2 to 5 percent of Mo, less than or equal to 0.05 percent of B, less than 0.25 percent of Si, less than 0.25 percent of Mn, and the balance Ni, so that the alloy has excellent high-temperature strength and structure stability, and favorable machinable property and economical efficiency. According to the alloy, a TCP phase is not precipitated obviously at the temperature below 760 DEG C, the tensile strength at the temperature being 760 DEG C is larger than 1000MPa, and the alloy is particularly suitable for preparing a medium-high temperature force-bearing part including a hydrogen cell of the hydrogen fuel cell air compressor bearing.

The invention belongs to the technical field of coal dry distillation engineering, and particularly relates to a method for depolymerizing coal by utilizing a novel biomass-based catalyst. Specifically, brown coal is pyrolyzed by using the novel Fe-Ni/Humus catalyst. The novel biomass-based catalyst Fe-Ni/Humus provided by the invention has the advantages of a high content of active component Fe,good thermal stability and oxidation resistance, better catalytic activity, cheapness and accessibility; and when the novel biomass-based catalyst is used for pyrolysis of the brown coal, the conversion rate of coal coke cracking can be improved, the catalyst can be regenerated, and a recycling pollution-free production conception is realized.