30results about How to "Obvious refinement" patented technology

The invention discloses a Ti-V composite microalloyed ultrafine bainite non-quenched and tempered steel and its controlled forging and controlled cooling process and production process. The Ti-V composite microalloyed ultrafine bainite non-quenched and tempered steel Steel includes the following chemical composition in weight percentage: C 0.20‑0.30%, Si 0.20‑0.40%, Mn 1.90‑2.10%, P≤0.010%, S 0.030‑0.050%, Cr 0.40‑0.60%, V 0.10‑0.20%, Ti 0.030‑0.050%, Ni≤0.20%, Mo≤0.20%, Al 0.015‑0.045%, N≤0.0070%, the rest is Fe and unavoidable impurity elements, and Ti‑3.43*N≥0.017% and Ti×N ≤0.00016%; through high Ti content alloying design, supplemented by V‑N microalloying, compared with ordinary bainitic non-quenched and tempered steel, this steel has obvious bainite structure refinement, and obtains a tempered Sorbitite structure, the strength and toughness are greatly improved.

The invention discloses a high-strength heat-conducting magnesium alloy and a preparation method thereof. The element content of the magnesium alloy is: Zr: 0.2-0.6wt.%, Zn: 4-6wt.%, Ca: 0.4-0.8wt.%. The amount is Mg. The preparation method of the magnesium alloy includes batching, adding magnesium ingots, adding intermediate alloys, refining, casting, solid solution treatment, extrusion deformation, solid solution treatment again and aging treatment. In order to promote the formation of alloy Zn-Ca clusters, different Zn-Ca master alloys are selected during smelting, and a short-term solution treatment of no more than 1h is performed after hot extrusion. The tensile strength of the alloy is greater than 325MPa, the yield strength is greater than 280MPa, the elongation is greater than 15%, and the thermal conductivity is greater than 120W·(m·K) ‑1 , the magnesium alloy has a high yield, good formability, easy industrialization, and can be used as a heat dissipation structural material for power supplies and electronic devices in the field of new generation aerospace.

The continuous thin plate blank casting and rolling process for producing high strength V-N micro alloy steel belt includes smelting and refining in electric furnace or converter, continuous casting, heating after solidification inside bottom heating furnace, hot rolling, laminated flow cooling and winding. The continuous thin plate blank casting and rolling process has the technological parameters of: furnace entering temperature of cast blank 900-1050 deg c, homogeneous heating temperature 1050-1250 deg c, initially rolling temperature 1000-1170 deg c, finally rolling temperature 840-950 deg c and winding temperature 530-670 deg c. The molten steel contains: C 0.03-0.08 wt%, Si 0.01-0.8 wt%, Mn 0.1-2.0 wt%, V 0.01-0.20 wt%, Al 0.01-0.06 wt% and N 0.002-0.03 wt%. The produced high strength and fine grain steel belt and plate has ferrite grain size smaller than 6.0 micron, yield strength of 420-700 MPa, and excellent toughness, welding performance and forming performance.

The invention discloses a composite modificator for regenerating an ADC12 aluminum alloy and a preparing method. The modificator comprises, by mass percent, 10%-20% of Te, 0.1%-10% of YbCl3 and the balance Al. After pure aluminum in a corundum crucible is melted and an Al-Te intermediate alloy and YbCl3 are added at the temperature ranging from 730 DEG C to 750 DEG C, heat preservation is conducted for 5-8 min, stirring is conducted for 3 min, and when the furnace temperature is reduced to 700-720 DEG C, argon inflation is conducted for refining, and heat preservation is conducted for 5-20 min; and surface dross is removed, and metal liquid is poured into a metal die to be solidified. The modificator can well avoid the action of alloy splitting due to mass thick needle-like iron-rich phases in the regenerated ADC12 aluminum alloy, the mechanical performance and machining performance of the regenerated ADC12 aluminum alloy are improved, gas in melt can be eliminated, generation of casting air holes is obviously reduced, and accordingly the product quality of castings is greatly improved.

A prepared method of semi-solid spherocrystal A-alloy is to treating the alloy fusant by the process of 'refining after metamorphism' or 'metamorphism after refining'; preparing the semi-solid by the reversible electromagnetic stirring; monitoring the temperature while stirring until the temperature is under the liquid phase 3-5 Deg C., then cooling and geting the product. The efficient of the process has been improved more greatly than the traditional one, and the alloy has been more available crystal nucleus.

A magnesium-air battery anode material and a preparation method thereof relate to the technical field of magnesium-air batteries. The anode material of the magnesium-air battery is Zn 1.0-5.0 wt.%, Ca 0.1-2.0 wt.%, and the rest is magnesium. Preparation method: (1) According to Zn 1.0~5.0wt.%, Ca 0.1~2.0wt.%, the rest is magnesium, weigh pure magnesium, pure zinc, Mg-Ca master alloy, and remove the oxide scale on the surface; (2) ) Preheat the alloy treated in (1) in a crucible, and then put it into the crucible for melting; (3) cast the melt in (2) at a suitable temperature in a metal mold to cool. The hydrogen evolution reaction of metal anodes in neutral NaCl solution is alleviated, and the 2 Mg 6 Zn 3 The formation position of the second phase optimizes the discharge process, reduces the accumulation thickness of the discharge products on the anode surface, and accelerates the shedding of the products.

The invention relates to a method for preparing a wear-resistant metal-multi-element ceramic composite modified coating on the surface of titanium alloy, which belongs to the technical field of surface engineering and comprises the following steps: (1) preparing pre-alloyed powder for use; (2) using industrial alcohol Clean the surface of the substrate to be clad, and then blacken the surface of the substrate; (3) Convey the pre-alloyed powder prepared in step (1) to the substrate to be clad in step (2) through coaxial powder feeding Laser cladding was carried out on the surface of the material to prepare a wear-resistant metal-multi-element ceramic composite modified coating on the titanium alloy surface. The composite modified coating prepared by the present invention has obvious grain refinement, which achieves the purpose of fine-grain strengthening, ensures that the coating has high toughness while having high hardness, thereby greatly improving the wear resistance of titanium alloys, and further improving the performance of titanium alloys. The service life of the alloy under complex working conditions.

The invention discloses an ultrahigh-strength aluminum alloy composite strip for an automobile water tank radiator and a manufacturing method for the ultrahigh-strength aluminum alloy composite strip. The composite strip is composed of a core material and a single-sided or double-sided braze welding layer, wherein the thickness of the welding layer on each surface accounts for 5-10% of the total thickness; the core material consists of the following components in percentage by weight: 0.12-0.26% of Fe, less than or equal to 0.12% of Si, 0.30-0.80% of Cu, 1.5-1.8% of Mn, less than or equal to 0.04% of Mg, 0.02-0.15% of Cr, 0.02-0.15% of Zr, 0.02-0.15% of Ti, less than or equal to 0.03% of each of other elements, less than or equal to 0.15% of contents of all other elements, and the balance of aluminum; the welding layer is made of an aluminum-silicon alloy which consists of the following components in percentage by weight: less than or equal to 0.20% of Fe, 8.0-11.0% of Si, less than or equal to 0.10% of Cu, less than or equal to 0.05% of Mn, 0.03-0.06% of Sr, less than or equal to 0.05% of Ti, less than or equal to 0.03% of each of other elements, less than or equal to 0.15% of all other elements, and the balance of aluminum. The ultrahigh-strength aluminum alloy composite strip has very excellent mechanical property after braze welding, and has yield strength which exceeds 70 MPa after braze welding.

The invention discloses a method for preparing a strengthened Cu-Nb composite wire. The method comprises: 1. annealing the Cu-Nb three-time composite wire prepared by a cluster drawing method after plastic drawing; 2. annealing The processed Cu-Nb three-time composite wire rod is carried out continuous multi-roller pass rolling to obtain the Cu-Nb composite wire rod intermediate; three, the Cu-Nb composite wire rod intermediate is subjected to plastic drawing processing to obtain a strengthened Cu-Nb composite wire rod wire. The present invention adopts the multi-roll pass rolling process for continuous rolling, which promotes the longitudinal deformation of the Cu-Nb tertiary composite wire rod, increases the amount of plastic deformation, and the distribution and deformation of the obtained strengthened Cu-Nb composite wire rod core wire are more uniform, The thinning of the core wire is more obvious, the plastic deformation ability is enhanced, the quality and performance of the reinforced Cu-Nb composite wire are improved, the mechanical properties and electrical conductivity are well matched, and the engineering application requirements are met.

The invention discloses a high-strength and tough magnesium alloy with controllable long-period phase size and a preparation method thereof. The method comprises the following steps: A. Cutting a Mg-Y-Zn alloy ingot into rods with a diameter of 10-14 mm The sample is placed in a mold with a cylindrical cavity with an inner diameter of 15 mm, and the sample is thermally compressed by the indenter to obtain an alloy rod in which the 18R long-period phase is twisted to varying degrees; B. The above alloy rod is subjected to multiple Sub-hot drawing process to obtain 18R long-period phase refinement and dispersion of high strength and toughness magnesium alloy. The present invention realizes the pre-kink of the 18R long-period phase by thermal compression, and realizes the control of the kink band density and degree by controlling the compression rate, and then utilizes subsequent large-strain multi-pass thermal drawing to make the long-period phase from kink With fracture refinement, 18R long-period phase refinement and size control are obtained, which significantly improves the strength and plasticity of the alloy.