Forging method of H13 steel vertical continuous casting round billet

Abstract

The invention relates to a forging method of an H13 steel vertical continuous casting round billet. The method comprises the following steps: the continuous casting billet is subjected to heat preservation in a furnace of 450+ / -10 DEG C, the temperature is raised to 850+ / -10 DEG C at the speed of less than or equal to 60 DEG C / h and raised to 1270+ / -10 DEG C at the speed of less than or equal to 120 DEG C / h, the continuous casting billet is air-cooled for 20+ / -5 min, put into a furnace of 1200+ / -10 DEG C furnace for insulation and pulled up on an oil press for four passes, the first-pass reduction rate is 35-45%, then the continuous casting billet is turned over by 90 degrees for second pass, the reduction rate of the second pass is 30-40%, the continuous casting billet is turned over by 180 degrees for third pass, the reduction rate of the third pass is 25-35%, the continuous casting billet is turned over by 90 degrees for fourth pass, the reduction rate of the fourth pass is 20-30%,the blank is chamfered after the fourth pass is finished, put into a furnace of 1000-1150 DEG C for heat preservation, discharged from the furnace and sent to a radial forging machine for reciprocating forging, the last pass is a finishing pass, the drawing and beating speed is 1.3-1.5 m / min, the other passes are the main deformation passes, the reduction rate is 15-30%, and the drawing and beating speed is greater than or equal to 6 m / min. The yield of the continuous casting round billet is improved, the cost is reduced, and the problems of flaw detection and center loosening are solved.

Description

technical field [0001] The invention belongs to the technical field of iron and steel material manufacturing process control, and in particular relates to a H13 steel vertical forging that solves the problem of low yield rate of H13 steel vertical continuous casting round billets by using a special forging control method without increasing production costs and at the same quality level. The forging method of continuous casting round billet reaches the level of national standard high-quality H13 steel. Background technique [0002] Due to the high alloy content and fractional crystallization of H13 steel, internal defects such as relatively serious dendrite segregation, center looseness, and center cracks are likely to occur during the continuous pouring process of vertical continuous casting round billets. Most vertical continuous casting round billets can only be used as electrode base materials for electroslag remelting, which prolongs the production cycle and increases pr...

AI Technical Summary

Problems solved by technology

[0002] Due to the high alloy content and fractional crystallization of H13 steel, internal defects such as relatively serious dendrite segregation, center looseness, and center cracks are likely to occur during the continuous pouring process of vertical continuous casting round billets. Most vertical continuous casting round billets can only be used as electrode base materials for electroslag remelting, which prolongs the production cycle and increases production costs

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