3results about How to "Eliminate segregation" patented technology

This invention discloses a magnesium-lithium alloy cabin structure component and its forming method, belonging to the field of magnesium-lithium alloy forming technology. The method includes the following steps: S1. Pre-treatment of the magnesium-lithium alloy ingot, followed by free forging or extrusion to obtain a billet; S2. Die forging the billet and air-cooling it to room temperature to obtain a forging; S3. Holding the forging at 270~290℃ for 4~6 hours, then quenching it in cold water and performing T5 heat treatment; finally, aging strengthening by holding it at 180~220℃ for 8~12 hours. The forming method of this invention improves product uniformity through pre-treatment and enhances product strength and toughness through heat treatment. This forming method has broad application prospects and is expected to be industrialized.

This invention relates to the field of hot extrusion manufacturing technology, specifically to a high-strength weldable 6xxx series aluminum alloy profile, its manufacturing method, and its application. The aluminum alloy profile is composed of the following weight percentages: Si: 0.80%~1.2%, Fe≤0.20%, Cu: 0.40%~0.80%, Mn: 0.30%~0.70%, Mg: 0.70%~1.1%, Cr≤0.25%, Zn≤0.10%, Ti≤0.10%, Zr: 0.05%-0.20%, Pb<0.01%, with the balance being Al and unavoidable impurities. The profile meets the following performance requirements: tensile properties, R... m ≥420MPa, R p0.2 ≥330MPa, A 50mm ≥8.0%; Fatigue performance: at r=0.1, N=1×10 7 Under the same conditions, the fatigue strength σ of the smooth sample is ≥145MPa, realizing the lightweight manufacturing of high-speed trains.

This invention discloses a continuous casting and rolling process for high-strength copper alloys, relating to the field of metallurgical engineering technology, comprising the following steps: (a) heating the copper matrix containing tin, zinc, and nickel, and adding appropriate amounts of rare earth elements, in a melting furnace to 1200-1300°C until a uniform copper alloy melt is formed; (b) maintaining the copper alloy melt in an optimal casting temperature range of 1150-1200°C using a holding furnace with temperature control function; (c) continuously casting the held copper alloy melt into long strip billets using a continuous casting machine equipped with an electromagnetic stirring device. The technical solution provided by this invention ensures the fluidity and purity of the copper alloy melt, significantly reduces inclusions using electromagnetic stirring technology, effectively promotes uniform solid solution of alloying elements and the formation of fine, dispersed strengthening phases, introduces a homogenization treatment stage, eliminates component segregation, and improves the uniformity of the material.