39results about How to "Good solid solution strengthening" patented technology

The invention discloses a low-welding crack sensitivity steel board and manufacturing method, which comprises the following parts: not more than 0.07% C, 0.15-0.40% Si, 1.00-1.60% Mn, not more than 0.015% P, not more than 0.010% S, not more than 0.30% Cu, not more than 0.50% Ni, not more than 0.30% Cr, not more than 0.30% Mo, not more than 0.08% V, not more than 0.08% Nb, 0.010-0.020% Ti, not more than 0.003% B, Fe and inevitable impurity. The invention is characterized by the following: (1)displaying lower welding crack sensitivity component with Pcm not more than 0.20%; (2)mating the strength and flexibility reasonably with fitful yielding ratio; (3)making the price and property of the steel board superior to the congeneric import product; (4)making the maximum breadth of steel board to 4000mm; (5)simplifying the technique to ensure higher flatness without quenching water.

The invention discloses a plastic mold steel which comprises the following chemical components in percentage by weight: 0.25-0.29% of C, 1.30-1.50% of Mn, 0.40-0.60% of Si, 1.20-1.50% of Cr, 0.40-0.50% of Mo, 0.02-0.05% of Nb, less than or equal to 0.15% of Ni, less than or equal to 0.15% of Cu, less than or equal to 0.020% of P, less than or equal to 0.015% of S, less than or equal to 0.012% of N and the balance of iron and inevitable impurities. In the manufacture method of the plastic mold steel, a quenching and tempering heat treatment process is not used, and direct air cooling after forging is carried out, thus prehardened plastic mold steel with thickness above 600 mm and uniform hardness from core to surface is manufactured. According to the plastic mold steel disclosed by the invention, the limit that the existing non-quenched and tempered mold steel has thickness smaller than 400 mm is overcome, and the requirements of mold industries on low-cost high-quality large-sized prehardened plastic mold steel are reached.

The invention discloses a rare earth-contained heat-resistant magnesium alloy and a preparation method thereof, belongs to the technical field of magnesium alloy preparation. The heat-resistant magnesium alloy disclosed by the invention comprises the following materials by weight: 2 to 8 percent of Sm, 0.5 to 6 percent of Gd, 0.1 to 2 percent of Zn, 0.1 to 1.5 percent of Zr, and Mg and inevitable impurity elements in balancing amount, wherein the total weight of the impurity elements is equal to or smaller than 0.02 percent. By adding ally elements (Sm, Gd and Zn) to replace Y and Nd of WE series alloies, and adjusting corresponding heat treatment processes to ensure that the prepared magnesium alloy has excellent indoor temperature intensity, high-temperature strength and plasticity, the indoor temperature intensity, high-temperature strength and plasticity of the magnesium alloy prepared according to the preparation method are more excellent than those of the conventional WE series commercial magnesium alloies; the preparation method of the magnesium alloy prepared according to the preparation method is lower than that of the conventional WE series commercial magnesium alloies. The process is simple; industrialized application is facilitated.

The invention provides a degradable corrosion-resistant high-toughness Zn-Fe-X zinc alloy for a human body and application thereof and relates to the field of medical implant materials. The zinc alloy contains a Zn element, a Fe element and an X element, wherein the X element is at least one of Mg, Ca and Sr, the mass percent of Zn element is 89.92-99.997%, the mass percent of Fe element is 0.002-10%, and the mass percent of X element is 0.001-0.08%. According to the zinc alloy provided by the invention, the cost of added materials is low, degradation products of all ingredients of a prepared alloy material can be degraded through human body metabolism, the corrosion resistance is far higher than that of a magnesium alloy, the degradation rate is greatly lowered, a longer-time mechanical support can be provided, and the strength and toughness of the alloy material are good.

The invention discloses an ultrahigh steel Q960E thick plate, and relates to the field of ultrahigh-strength steel thick plate producing and manufacturing. The ultrahigh steel Q960E thick plate comprises chemical components including, by mass percent, 0.15%-0.18% of C, 0.20%-0.50% of Si, 0.80%-1.30% of Mn, smaller than or equal to 0.010% of P, smaller than or equal to 0.003% of S, 0.30%-0.50% of Cr, 0.40%-0.60% of Mo, 0.80%-1.0% of Ni, 0.008%-0.030% of Ti, 0.015%-0.050% of Nb, 0.0008%-0.0025% of B and the balance Fe and inevitable impurities. The medium-high carbon and alloying component design is adopted, controlled rolling and offline heat treatment methods are adopted for assistance, and the ultrahigh-strength steel thick plate with the thickness being 90 mm is provided.

The invention relates to a high-strength and heat-resisting rare earth aluminum alloy containing rare earth samarium and a preparing method of the high-strength and heat-resisting rare earth aluminumalloy and belongs to the technical field of alloys. The aluminum alloy comprises the following components including, by mass percent, 5%-6% of Zn, 2%-3% of Mg, 1%-2% of Cu, 0.1%-0.2% of Sm and the balance Al and inevitable impurities. Various second phases, uniform and fine microstructures and weak base plane textures are evenly distributed in the alloy, and therefore the alloy can have high strength and high plasticity. The invention further discloses a preparing method of the high-strength and heat-resisting rare earth aluminum alloy material, nano-order and micron-order second phases and grains with the size being relatively fine are evenly distributed in the tissue of the prepared aluminum alloy, and the mechanical performance of the aluminum alloy is obviously improved.

The invention discloses novel platinum-based high-temperature resistance strain alloy and a preparation method thereof. The alloy is prepared from the following chemical components in percentage by mass: 15 to 40 percent of Rh, 4 to 10 percent of Mo, 2 to 8 percent of Re, 0.5 to 3 percent of Cr, and the balance of Pt. The alloy can also be added with 0 to 2 percent of M (M is at least one of Ni, Zr, Y and Sc). A finish product is prepared by adopting the processes of preparing an alloy ingot in a high-frequency induction smelting furnace, hammer cogging at a high temperature, performing stableheat treatment and the like. The alloy material has high tensile strength and electrical resistivity, low resistance temperature coefficient, excellent high-temperature mechanical properties and oxidation resistance, and resistance-temperature characteristic is linear in the temperature range of 0 to 1,050 DEG C, the novel platinum-based high-temperature resistance strain alloy can be widely applied to the stress-strain test of a hot end component at over 1,000 DEG C in the fields, such as spaceflight, aviation, heavy machinery, petrochemical industry and nuclear industry, and ensures the safety and reliability of an operating system.

The invention relates to a preparation method for Fe-Mn-Al alloy, and belongs to the technical field of lightweight and high strength alloy preparation. The preparation method comprises the steps that by weight, 12.0-14.0% of Al, 18.0-30.0% of Mn and the balance Fe are mixed evenly and proportionally; mixed powder is subjected to tabletting and then is smelted under the protection of inert gas, melts are continuously stirred in the smelting process, and when the temperature of alloy melts reaches 1520-1550 DEG C, a water-cooling copper mold is adopted to cast a sample; the obtained sample is subjected to heat preservation at the 1000 DEG C for 2-3 hours under the protection of inert gas and then subjected to oil quenching, alloy after oil quenching continues to be heated to 550-650 DEG C at the atmosphere of inert gas and subjected to tempering treatment, after heat preservation is conducted for 2-4 hours, the alloy is cooled to the indoor temperature along with a furnace, and the Fe-Mn-Al lightweight and high strength alloy is obtained. The method is relatively simple and reliable, and the prepared Fe-Mn-Al alloy is high in strength, light, good in oxidation resistance and good in corrosion resistance.

The invention discloses a near-beta type titanium alloy with good matching of strength and plasticity and a preparation method thereof, and belongs to the field of titanium alloys. According to the preparation method, medium-sized crystal grains in the sintered alloy are crushed and refined after upsetting, drawing and cogging in a single-phase region. Then a rolled bar is subjected to one-step quasi-beta bar rolling at a phase transformation point by utilizing a relatively high phase transformation point caused by high oxygen content of the alloy, crystal grains are crushed again, and a coordinated structure of non-uniform crystal grains and a multi-stage layered second phase is realized by virtue of dynamic precipitation and partial recrystallization of the second phase under the actionof thermal coupling. Non-uniform mixed crystals comprise ultrafine beta crystal grains and coarse beta crystal grains, and the multi-stage layered second phase comprises a layered primary alpha phase,a strip-shaped grain boundary alpha phase and a beta transformation structure. After short-time heat treatment, the non-uniform mixed crystal structure is reserved, the multi-stage layered second phase is increased from ternary to quaternary through the separated fine-needle-shaped alpha phase, and the alloy maintains good plasticity while having high strength.

The invention relates to a powder metallurgy preparation method of a Fe-Mn-Al series alloy, and belongs to the technical field of powder metallurgy preparation. The powder metallurgy preparation method comprises the steps that firstly aluminum powder, manganese powder and iron powder are evenly mixed to obtain Fe-Mn-Al mixed powder; under the protection of argon, the obtained Fe-Mn-Al mixed powderis smelted to be qualified alloy liquid, then the alloy liquid is injected into a tundish located above an atomizing nozzle, the alloy liquid flows out from a leakage hole in the bottom of the tundish and encounters high-speed argon airflow with the pressure being 6 MPa to be atomized to be small droplets when passing through an HK-03 type annular hole nozzle, the atomized droplets are rapidly solidified in a closed atomizing cylinder to be Fe-Mn-Al alloy powder, and the Fe-Mn-Al alloy powder passes through a label screen which is 100 meshes; and the obtained Fe-Mn-Al alloy powder is subjected to pressing forming, in the hydrogen environment, temperature is improved to 800-1200 DEG C and sintering is conducted for 4-8 h, after sintering is completed, furnace cooling is conducted till thetemperature reaches the room temperature, and a block-shaped Fe-Mn-Al alloy is obtained. According to the powder metallurgy preparation method, the corrosion resistance, the specific strength, the high-temperature oxidation resistance and the like of the obtained Fe-Mn-Al alloy are greatly improved.