A kind of forging method of h13 steel vertical continuous casting round billet

Abstract

The invention relates to a forging method for vertical continuous casting round billets of H13 steel, which comprises the following steps: the continuous casting billets are kept warm in a furnace at 450±10°C, heated to 850±10°C at a rate of ≤60°C / h, and kept at ≤60°C 120°C / h speed rises to 1270±10°C for heat preservation, air cooling for 20±5min, enters 1200±10°C furnace for heat preservation, pulls four times on the hydraulic press, the reduction rate of the first pass is 35-45%, and the execution is over Turn over 90° for the second pass, the reduction rate is 30-40%, turn over 180° for the third pass at the end of execution, and perform the third pass with a reduction rate of 25-35%, turn over 90° for the fourth pass at the end of execution, and the reduction rate 20-30%, after the blank is chamfered, put it into a furnace at 1000-1150 ℃ for heat preservation, after the blank is out of the furnace, it is sent to a radial forging machine for reciprocating forging, the last pass is a finishing pass, and the drawing speed is 1.3-1.5m / min, the rest of the passes are mainly deformation passes, the reduction rate is 15-30%, and the drawing speed is ≥6m / min, which improves the yield of continuous casting round billets, reduces costs, and solves the problems of flaw detection and center porosity.

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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