3results about How to "Improve solid solution strengthening" patented technology

This invention discloses an ultra-high strength heat-resistant titanium-based composite material and its preparation method. The preparation method includes: ball milling and mixing titanium alloy powder, reinforcing phase raw material, and β-stabilizing element powder to obtain a mixed powder, wherein the content of the β-stabilizing element in the mixed powder is 0.01 wt.%–9 wt.%; and using a laser melting deposition additive manufacturing method: delivering the mixed powder to a molten pool on the surface of a substrate via a powder feeding gas flow, melting and depositing it on the substrate surface under laser action, and obtaining the ultra-high strength heat-resistant titanium-based composite material through layer-by-layer deposition. The ultra-high strength heat-resistant titanium-based composite material prepared by this method achieves ultra-high strength, breaking through the performance bottleneck of the ultimate load-bearing capacity of titanium-based composite materials.

This invention provides a high-flatness copper-nickel-tin-zinc alloy and its preparation method, belonging to the field of copper alloy manufacturing technology. The high-flatness copper-nickel-tin-zinc alloy provided by this invention, by mass percentage, comprises the following chemical composition: Ni: 0.2-3.0%, Sn: 0.2-2.0%, Zn: 0.05-0.2%, Fe: 0.01-0.1%, P: 0.02-0.08%, Nb: 0.05-0.28%, Ta: 0.05-0.2%, La: 0.02-0.1%, and the balance Cu. The results of the examples show that the copper-nickel-tin-zinc alloy of this invention has a tensile strength >600 MPa and an elongation A... 11.3 The heat shrinkage rate is 5-7%, the hardness is >180HV, the conductivity is ≥40%IACS, the bending rate is 7-8mm / m, the flatness is ≤0.05mm, and the heat shrinkage rate is ≤0.006%.

The invention discloses a preparation method of a TiZrNbCr medium-entropy alloy with high-temperature strength and toughness, and relates to the technical field of medium-entropy alloys, the chemical formula of the medium-entropy alloy is recorded as (TiZrNb) xCry, x and y are the molar percentage of TiZrNb and Cr, x is larger than or equal to 95 and smaller than or equal to 99, and y is larger than or equal to 1 and smaller than or equal to 5. An alloy cast ingot, namely a TiZrNbCr medium-entropy alloy ingot, is obtained; secondly, the alloy ingot is subjected to wire cut electrical discharge machining to obtain a square alloy sheet; thirdly, the square alloy sheet is put into a rolling mill to be rolled, the TiZrNbCr medium-entropy alloy with high-temperature strength and toughness is obtained, a proper amount of Cr element is added into the TiZrNb alloy, solid solution strengthening is enhanced, and the strength of the alloy under the high-temperature condition is effectively improved; the structural stability is enhanced, and the alloy keeps good toughness at high temperature.