Production method for rolling and cogging big cast ingot of high-carbon high-alloy cold-working die steel

Abstract

The invention relates to a production method for rolling and cogging a big cast ingot of high-carbon high-alloy cold-working die steel. The production method comprises 1) hot charging the cast ingot of high-carbon high-alloy cold-working die steel; 2) homogenizing in a soaking pit including a first fire cast ingot heating procedure, which comprises (A) charging the cast ingot at temperature of 600-800 DEG C, and keeping warm for 100-150 minutes; (B) raising the temperature to 1,100-lower than 1,200 DEG C; (C) at the temperature of 1,100-lower than 1,200 DEG C, incubating for 2-5 hours; and (D) keeping the temperature difference of the female face and male face of the cast ingot smaller than 50 DEG C; and a second fire rolled piece melt-down heating, which comprises (A) heating and raising the temperature to 1,100-lower than 1,200 DEG C, and incubating for 2-3 hours; (B) keeping the temperature difference of the female face and male face of the cast ingot smaller than 50 DEG C; and 3) after the two heating procedures, respectively carrying out rolling; wherein (A) the preheating temperature of a roller is 100-200 DEG C; (B) initial rolling temperature is 1,100- lower than 1,200 DEG C, and the final rolling temperature is higher than 900 DEG C; and (C) the biting speed of the roller is 10-40r / min. The production method has the advantages that the process is simple; the ingot mold of the cast ingot is enlarged, and the production cycle is greatly shortened; the energy consumption is greatly reduced; and the cogging yield is increased.

Description

technical field [0001] The present invention relates to a production method for thermal processing of steel materials in the field of metallurgy. Specifically, the present invention relates to a production method for thermal processing of steel materials for cold-working dies. More specifically, the present invention relates to a high-carbon high-alloy cold-working The invention relates to a production method for thermal processing of large ingots of die steel. Background technique [0002] Die steel is a special alloy steel. According to its use, it can be divided into three categories: hot work die steel, cold work die steel and plastic die steel. Cold work die steel can generally be divided into two types: low alloy cold work die steel and high alloy cold work die steel (alloy content greater than 10%). [0003] High-carbon (carbon content ≥ 2%) high-alloy cold-work die steel is a special high-alloy cold-work die steel. High-carbon high-alloy cold-work die steel can with...

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Problems solved by technology

[0013] In order to solve the above-mentioned problems in the prior art, the object of the present invention is to provide a production method for hot-working and billeting of large ingots of high-carbon and high-alloy cold-work die steels. The high-carbon and high-alloy cold-work die steels are X210CrW12 High-carbon and high-alloy cold-working die steel, the weight of the large ingot is 2-5t, thus solving the problem that the high-carbon (carbon content ≥ 2%) high-alloy cold-working die steel X210CrW12 large ingot (weight greater than 2t) cannot be hot-processed The technical problem of rolling billets is to roll out qualified X210CrW12 steel billets. At the same time, according to the production method of hot-working billets of high-carbon and high-alloy cold-work die steel large ingots of the present invention, energy consumption and energy consumption can be greatly reduced. Production Costs for Metallurgical Manufacturing

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