Water cooling die casting process of polygonal steel ingots, and water cooling die casting device

Abstract

The invention relates to a water cooling die casting process of polygonal steel ingots, and a water cooling die casting device, belonging to the technical field of production of steel ingots. The water cooling die casting process is characterized in that: cavities of n-gon steel ingots are poured, wherein each of the cavities comprises n / 2 main dies and n / 2 corner dies; the main dies are regulated by oil cylinders so as to guarantee cooled parts of die bodies to be always attached on shells of the ingots when the steel ingots are subjected to volume shrinkage; during pouring, molten steel is subjected to heat exchange through a lining plate under water cooling condition; the molten steel is cooled rapidly, and then is crystallized and solidified to be the steel ingots. With use of the water cooling die casting process of polygonal steel ingots, and the water cooling die casting device disclosed by the invention, steel ingots such as carbon steel ingots, alloy steel ingots, die steel ingots and stainless steel ingots can be poured; and the specifications of the steel ingots are as follows: the diameter of circumcircle is less than or equal to 1, 510mm, the height of the ingots is less than or equal to 5, 000mm, and the yield of the steel ingots is greater than or equal to 95%; a test piece is cut along a casting head line, so no visible shrinkage cavity is formed; the center segregation, the center porosity, the intermediate crack, the cellular air bubbles, etc. of macrostructures of the steel ingots should be all less than 0.5 level; and equiaxial crystal ratio of a cross section is greater than or equal to 30%. According to the water cooling die casting process of polygonal steel ingots, and the water cooling die casting device disclosed by the invention, material utilization can be increased effectively, loss in steel ingot dies can be decreased, and the quality of the cast ingots can be improved.

Description

Technical field: [0001] The invention relates to a water-cooled die-casting method and a water-cooled die-casting device for a polygonal steel ingot, belonging to the technical field of steel ingot production, in particular to a hexagon with a large height-to-diameter ratio, no shrinkage cavity in the ingot body, and a cross-sectional equiaxed crystal ratio ≥ 30%. Shaped steel ingots. Background technique: [0002] At present, polygonal steel ingots for pressure processing such as forging and rolling are produced by cast iron ingot molds. Traditional cast iron molds and their production processes have many shortcomings and deficiencies: [0003] 1. The proportion of steel ingot risers is large, and the yield is low; [0004] 2. The height-to-diameter ratio of steel ingots is limited. [0005] 3. The surface of the steel ingot is prone to defects such as heavy skin, folds, and stuttering; [0006] 4. Quality problems such as shrinkage cavity, porosity, segregation, and dev...

AI Technical Summary

Problems solved by technology

[0003] 1. The proportion of steel ingot risers is large, and the yield is low;

[0004] 2. The height-to-diameter ratio of steel ingots is limited

[0005] 3. The surface of the steel ingot is prone to defects such as heavy skin, folds, and stuttering;

[0006] 4. Quality problems such as shrinkage cavity, porosity, segregation, and developed columnar crystals are prone to appear in the steel ingot;

[0007] 5. The life of the ingot mold is short and the cleaning is complicated;

[0008] 6. Poor working environment and high labor intensity

Therefore, this invention can only realize the casting of quadrilateral wide and thick slabs, and cannot mold cast steel ingots with more than six sides

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