3results about How to "Eliminate composition segregation" patented technology

A high-alloy steel electroslag ingot and its homogenization method are provided, comprising the following steps: S1, electroslag ingot pretreatment: removing surface oxide scale and crack defects, and grinding to a surface roughness Ra≤6.3μm; S2, staged heating: heating to 800-900℃ at a rate ≤100℃ / h and holding for 2-6h; heating to 1000-1100℃ at a rate ≤100℃ / h and holding for 2-6h; heating to 1200-1300℃ at a rate ≤150℃ / h and holding for 10h. -20h; S3, Stepped cooling: Turn off the heating device and cool with the furnace to 800-1000℃, hold for 2-6h; cool to 500-650℃ at a rate of ≤50℃ / h, hold for 2-6h; open the furnace door and introduce cooling air at a speed of 0.5-3m / s to cool to room temperature, obtaining homogenized high-alloy steel electroslag ingots; S4, Post-homogenization testing: the relative standard deviation of each alloying element is ≤5%; the average grain size is ≤10μm; the Brinell hardness fluctuation range is ≤15HBW. This invention eliminates component segregation, refines grain structure, optimizes process parameters, is highly efficient and energy-saving, easy to promote, and has strong practicality.

The application discloses a kind of self-adapting temperature control type energy-saving waste mould steel metal electroslag remelting device, it is related to metal electroslag remelting technical field, including remelting furnace body, the outside lower portion of remelting furnace body is provided with bearing base;The inside of remelting furnace body is provided with remelting mechanism, and remelting mechanism contains remelting material cylinder;Wherein, the inside central position of remelting material cylinder is fixedly installed with remelting vertical pipe;The inside of remelting furnace body is provided with temperature control mechanism, and temperature control mechanism contains temperature control lining cylinder.The self-adapting temperature control type energy-saving waste mould steel metal electroslag remelting device, by the temperature control lining cylinder of remelting furnace body and temperature control uniform rod, for remelting material cylinder realizes the dispersion of internal and external heat, cooperate with the rotating remelting material cylinder and material uniform support auxiliary promotion waste mould steel heating uniformity, while electric heating box realizes internal temperature detection to eliminate artificial intervention error, and after melting, it is taken out to realize cooling and deoxidizing refining.

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.